Release 0.5.0

Add info about the default I2CP port to README.md

README.md

@@ -4,30 +4,38 @@ MuWire is an easy to use file-sharing program which offers anonymity using [I2P
 
 It is inspired by the LimeWire Gnutella client and developped by a former LimeWire developer.
 
-The current stable release - 0.2.5 is avaiable for download at http://muwire.com.  You can find technical documentation in the "doc" folder.
+The current stable release - 0.4.15 is avaiable for download at https://muwire.com.  You can find technical documentation in the "doc" folder.
 
 ### Building
 
-You need JRE 8 or newer.  After installing that and setting up the appropriate paths, just type
+You need JDK 8 or newer.  After installing that and setting up the appropriate paths, just type
 
 ```
-./gradlew assemble 
+./gradlew clean assemble
 ```
 
 If you want to run the unit tests, type
 ```
-./gradlew build
+./gradlew clean build
 ```
 
-Some of the UI tests will fail because they haven't been written yet :-/
+If you want to build binary bundles that do not depend on Java or I2P, see the https://github.com/zlatinb/muwire-pkg project
 
 ### Running
 
-You need to have an I2P router up and running on the same machine.  After you build the application, look inside "gui/build/distributions".  Untar/unzip one of the "shadow" files and then run the jar contained inside by typing "java -jar MuWire-x.y.z.jar" in a terminal or command prompt.  If you use a custom I2CP host and port, create a file $HOME/.MuWire/i2p.properties and put "i2cp.tcp.host=<host>" and "i2cp.tcp.port=<port>" in there.
+After you build the application, look inside `gui/build/distributions`.  Untar/unzip one of the `shadow` files and then run the jar contained inside by typing `java -jar gui-x.y.z.jar` in a terminal or command prompt.
 
-The first time you run MuWire it will ask you to select a nickname.  This nickname will be displayed with search results, so that others can verify the file was shared by you.  It is best to leave MuWire running all the time, just like I2P.
+If you have an I2P router running on the same machine that is all you need to do.  If you use a custom I2CP host and port, create a file `i2p.properties` and put `i2cp.tcp.host=<host>` and `i2cp.tcp.port=<port>` in there.  On Windows that file should go into `%HOME%\AppData\Roaming\MuWire`, on Mac into `$HOME/Library/Application Support/MuWire` and on Linux `$HOME/.MuWire`
+
+[Default I2CP port]\: `7654`
+
+### GPG Fingerprint
+
+```
+471B 9FD4 5517 A5ED 101F  C57D A728 3207 2D52 5E41
+```
+
+You can find the full key at https://keybase.io/zlatinb
 
 
-### Known bugs and limitations
-
-* Many UI features you would expect are not there yet
+[Default I2CP port]: https://geti2p.net/en/docs/ports

TODO.md

@@ -4,10 +4,6 @@ Not in any particular order yet
 
 ### Big Items
 
-##### Alternate Locations
-
-This helps peers discover new sources for a file while the download is in progress.  Also makes sharing of partial files possible.
-
 ##### Bloom Filters
 
 This reduces query traffic by not sending last hop queries to peers that definitely do not have the file
@@ -16,18 +12,6 @@ This reduces query traffic by not sending last hop queries to peers that definit
 
 This helps with scalability
 
-##### Trust List Sharing
-
-For helping users make better decisions whom to trust
-
-##### Content Control Panel
-
-To allow every user to not route queries for content they do not like.  This is mostly GUI work, the backend part is simple
-
-##### Packaging With JRE, Embedded Router
-
-For ease of deployment for new users, and so that users do not need to run a separate I2P router
-
 ##### Web UI, REST Interface, etc.
 
 Basically any non-gui non-cli user interface
@@ -38,8 +22,5 @@ To enable parsing of metadata from known file types and the user editing it or a
 
 ### Small Items
 
-* Detect if router is dead and show warning or exit
 * Wrapper of some kind for in-place upgrades
-* Download file sequentially
-* Unsharing of files
-* Multiple-selection download, Ctrl-A
+* Automatic adjustment of number of I2P tunnels

build.gradle

@@ -2,7 +2,7 @@ subprojects {
     apply plugin: 'groovy'
 
     dependencies {
-        compile 'net.i2p:i2p:0.9.40'
+        compile 'net.i2p:i2p:0.9.42'
         compile 'org.codehaus.groovy:groovy-all:2.4.15'
     }
 

cli/src/main/groovy/com/muwire/cli/Cli.groovy

@@ -35,7 +35,7 @@ class Cli {
 
         Core core
         try {
-            core = new Core(props, home, "0.2.9")
+            core = new Core(props, home, "0.5.0")
         } catch (Exception bad) {
             bad.printStackTrace(System.out)
             println "Failed to initialize core, exiting"

cli/src/main/groovy/com/muwire/cli/CliDownloader.groovy

@@ -53,7 +53,7 @@ class CliDownloader {
 
         Core core
         try {
-            core = new Core(props, home, "0.2.9")
+            core = new Core(props, home, "0.5.0")
         } catch (Exception bad) {
             bad.printStackTrace(System.out)
             println "Failed to initialize core, exiting"

core/build.gradle

@@ -2,8 +2,9 @@ apply plugin : 'application'
 mainClassName = 'com.muwire.core.Core'
 applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties']
 dependencies {
-    compile 'net.i2p.client:mstreaming:0.9.40'
-    compile 'net.i2p.client:streaming:0.9.40'
+    compile 'net.i2p:router:0.9.42'
+    compile 'net.i2p.client:mstreaming:0.9.42'
+    compile 'net.i2p.client:streaming:0.9.42'
 
     testCompile 'org.junit.jupiter:junit-jupiter-api:5.4.2'    
     testCompile 'junit:junit:4.12'

core/src/main/groovy/com/muwire/core/Constants.groovy

@@ -1,15 +0,0 @@
-package com.muwire.core
-
-import net.i2p.crypto.SigType
-
-class Constants {
-    public static final byte PERSONA_VERSION = (byte)1
-    public static final SigType SIG_TYPE = SigType.EdDSA_SHA512_Ed25519 
-    
-    public static final int MAX_HEADER_SIZE = 0x1 << 14
-    public static final int MAX_HEADERS = 16
-    
-    public static final float DOWNLOAD_SEQUENTIAL_RATIO = 0.8f
-    
-    public static final String SPLIT_PATTERN = "[\\.,_-]"
-}

core/src/main/groovy/com/muwire/core/Core.groovy

@@ -1,6 +1,7 @@
 package com.muwire.core
 
 import java.nio.charset.StandardCharsets
+import java.util.concurrent.atomic.AtomicBoolean
 
 import com.muwire.core.connection.ConnectionAcceptor
 import com.muwire.core.connection.ConnectionEstablisher
@@ -12,10 +13,14 @@ import com.muwire.core.connection.I2PConnector
 import com.muwire.core.connection.LeafConnectionManager
 import com.muwire.core.connection.UltrapeerConnectionManager
 import com.muwire.core.download.DownloadManager
+import com.muwire.core.download.SourceDiscoveredEvent
 import com.muwire.core.download.UIDownloadCancelledEvent
 import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.download.UIDownloadPausedEvent
+import com.muwire.core.download.UIDownloadResumedEvent
 import com.muwire.core.files.FileDownloadedEvent
 import com.muwire.core.files.FileHashedEvent
+import com.muwire.core.files.FileHashingEvent
 import com.muwire.core.files.FileHasher
 import com.muwire.core.files.FileLoadedEvent
 import com.muwire.core.files.FileManager
@@ -23,20 +28,29 @@ import com.muwire.core.files.FileSharedEvent
 import com.muwire.core.files.FileUnsharedEvent
 import com.muwire.core.files.HasherService
 import com.muwire.core.files.PersisterService
+import com.muwire.core.files.UIPersistFilesEvent
+import com.muwire.core.files.AllFilesLoadedEvent
+import com.muwire.core.files.DirectoryUnsharedEvent
 import com.muwire.core.files.DirectoryWatcher
 import com.muwire.core.hostcache.CacheClient
 import com.muwire.core.hostcache.HostCache
 import com.muwire.core.hostcache.HostDiscoveredEvent
+import com.muwire.core.mesh.MeshManager
 import com.muwire.core.search.QueryEvent
 import com.muwire.core.search.ResultsEvent
 import com.muwire.core.search.ResultsSender
 import com.muwire.core.search.SearchEvent
 import com.muwire.core.search.SearchManager
+import com.muwire.core.search.UIResultBatchEvent
 import com.muwire.core.trust.TrustEvent
 import com.muwire.core.trust.TrustService
+import com.muwire.core.trust.TrustSubscriber
+import com.muwire.core.trust.TrustSubscriptionEvent
 import com.muwire.core.update.UpdateClient
 import com.muwire.core.upload.UploadManager
 import com.muwire.core.util.MuWireLogManager
+import com.muwire.core.content.ContentControlEvent
+import com.muwire.core.content.ContentManager
 
 import groovy.util.logging.Log
 import net.i2p.I2PAppContext
@@ -45,6 +59,7 @@ import net.i2p.client.I2PSession
 import net.i2p.client.streaming.I2PSocketManager
 import net.i2p.client.streaming.I2PSocketManagerFactory
 import net.i2p.client.streaming.I2PSocketOptions
+import net.i2p.client.streaming.I2PSocketManager.DisconnectListener
 import net.i2p.crypto.DSAEngine
 import net.i2p.crypto.SigType
 import net.i2p.data.Destination
@@ -52,6 +67,9 @@ import net.i2p.data.PrivateKey
 import net.i2p.data.Signature
 import net.i2p.data.SigningPrivateKey
 
+import net.i2p.router.Router
+import net.i2p.router.RouterContext
+
 @Log
 public class Core {
 
@@ -62,6 +80,7 @@ public class Core {
     final MuWireSettings muOptions
 
     private final TrustService trustService
+    private final TrustSubscriber trustSubscriber
     private final PersisterService persisterService
     private final HostCache hostCache
     private final ConnectionManager connectionManager
@@ -73,23 +92,16 @@ public class Core {
     private final DownloadManager downloadManager
     private final DirectoryWatcher directoryWatcher
     final FileManager fileManager
+    final UploadManager uploadManager
+    final ContentManager contentManager
+
+    private final Router router
+
+    final AtomicBoolean shutdown = new AtomicBoolean()
 
     public Core(MuWireSettings props, File home, String myVersion) {
         this.home = home
         this.muOptions = props
-        log.info "Initializing I2P context"
-        I2PAppContext.getGlobalContext().logManager()
-        I2PAppContext.getGlobalContext()._logManager = new MuWireLogManager()
-        
-		log.info("initializing I2P socket manager")
-		def i2pClient = new I2PClientFactory().createClient()
-		File keyDat = new File(home, "key.dat")
-		if (!keyDat.exists()) {
-			log.info("Creating new key.dat")
-			keyDat.withOutputStream { 
-				i2pClient.createDestination(it, Constants.SIG_TYPE)
-			}
-		}
 
         i2pOptions = new Properties()
         def i2pOptionsFile = new File(home,"i2p.properties")
@@ -104,13 +116,53 @@ public class Core {
             i2pOptions["inbound.nickname"] = "MuWire"
             i2pOptions["outbound.nickname"] = "MuWire"
             i2pOptions["inbound.length"] = "3"
-            i2pOptions["inbound.quantity"] = "2"
+            i2pOptions["inbound.quantity"] = "4"
             i2pOptions["outbound.length"] = "3"
-            i2pOptions["outbound.quantity"] = "2"
+            i2pOptions["outbound.quantity"] = "4"
             i2pOptions["i2cp.tcp.host"] = "127.0.0.1"
             i2pOptions["i2cp.tcp.port"] = "7654"
+            Random r = new Random()
+            int port = r.nextInt(60000) + 4000
+            i2pOptions["i2np.ntcp.port"] = String.valueOf(port)
+            i2pOptions["i2np.udp.port"] = String.valueOf(port)
+            i2pOptionsFile.withOutputStream { i2pOptions.store(it, "") }
         }
 
+        if (!props.embeddedRouter) {
+            log.info "Initializing I2P context"
+            I2PAppContext.getGlobalContext().logManager()
+            I2PAppContext.getGlobalContext()._logManager = new MuWireLogManager()
+            router = null
+        } else {
+            log.info("launching embedded router")
+            Properties routerProps = new Properties()
+            routerProps.setProperty("i2p.dir.base", home.getAbsolutePath())
+            routerProps.setProperty("i2p.dir.config", home.getAbsolutePath())
+            routerProps.setProperty("router.excludePeerCaps", "KLM")
+            routerProps.setProperty("i2np.inboundKBytesPerSecond", String.valueOf(props.inBw))
+            routerProps.setProperty("i2np.outboundKBytesPerSecond", String.valueOf(props.outBw))
+            routerProps.setProperty("i2cp.disableInterface", "true")
+            routerProps.setProperty("i2np.ntcp.port", i2pOptions["i2np.ntcp.port"])
+            routerProps.setProperty("i2np.udp.port", i2pOptions["i2np.udp.port"])
+            routerProps.setProperty("i2np.udp.internalPort", i2pOptions["i2np.udp.port"])
+            router = new Router(routerProps)
+            router.getContext().setLogManager(new MuWireLogManager())
+            router.runRouter()
+            while(!router.isRunning())
+                Thread.sleep(100)
+        }
+
+        log.info("initializing I2P socket manager")
+        def i2pClient = new I2PClientFactory().createClient()
+        File keyDat = new File(home, "key.dat")
+        if (!keyDat.exists()) {
+            log.info("Creating new key.dat")
+            keyDat.withOutputStream {
+                i2pClient.createDestination(it, Constants.SIG_TYPE)
+            }
+        }
+
+
         // options like tunnel length and quantity
         I2PSession i2pSession
         I2PSocketManager socketManager
@@ -119,6 +171,7 @@ public class Core {
         }
         socketManager.getDefaultOptions().setReadTimeout(60000)
         socketManager.getDefaultOptions().setConnectTimeout(30000)
+        socketManager.addDisconnectListener({eventBus.publish(new RouterDisconnectedEvent())} as DisconnectListener)
         i2pSession = socketManager.getSession()
 
         def destination = new Destination()
@@ -162,10 +215,16 @@ public class Core {
         eventBus.register(FileDownloadedEvent.class, fileManager)
         eventBus.register(FileUnsharedEvent.class, fileManager)
         eventBus.register(SearchEvent.class, fileManager)
+        eventBus.register(DirectoryUnsharedEvent.class, fileManager)
+
+        log.info("initializing mesh manager")
+        MeshManager meshManager = new MeshManager(fileManager, home, props)
+        eventBus.register(SourceDiscoveredEvent.class, meshManager)
 
         log.info "initializing persistence service"
-		persisterService = new PersisterService(new File(home, "files.json"), eventBus, 15000, fileManager)
+        persisterService = new PersisterService(new File(home, "files.json"), eventBus, 60000, fileManager)
         eventBus.register(UILoadedEvent.class, persisterService)
+        eventBus.register(UIPersistFilesEvent.class, persisterService)
 
         log.info("initializing host cache")
         File hostStorage = new File(home, "hosts.json")
@@ -186,7 +245,9 @@ public class Core {
         cacheClient = new CacheClient(eventBus,hostCache, connectionManager, i2pSession, props, 10000)
 
         log.info("initializing update client")
-        updateClient = new UpdateClient(eventBus, i2pSession, myVersion, props)
+        updateClient = new UpdateClient(eventBus, i2pSession, myVersion, props, fileManager, me)
+        eventBus.register(FileDownloadedEvent.class, updateClient)
+        eventBus.register(UIResultBatchEvent.class, updateClient)
 
         log.info("initializing connector")
         I2PConnector i2pConnector = new I2PConnector(socketManager)
@@ -200,14 +261,17 @@ public class Core {
         eventBus.register(ResultsEvent.class, searchManager)
 
         log.info("initializing download manager")
-        downloadManager = new DownloadManager(eventBus, i2pConnector, home, me)
+        downloadManager = new DownloadManager(eventBus, trustService, meshManager, props, i2pConnector, home, me)
         eventBus.register(UIDownloadEvent.class, downloadManager)
         eventBus.register(UILoadedEvent.class, downloadManager)
         eventBus.register(FileDownloadedEvent.class, downloadManager)
         eventBus.register(UIDownloadCancelledEvent.class, downloadManager)
+        eventBus.register(SourceDiscoveredEvent.class, downloadManager)
+        eventBus.register(UIDownloadPausedEvent.class, downloadManager)
+        eventBus.register(UIDownloadResumedEvent.class, downloadManager)
 
         log.info("initializing upload manager")
-        UploadManager uploadManager = new UploadManager(eventBus, fileManager)
+        uploadManager = new UploadManager(eventBus, fileManager, meshManager, downloadManager)
 
         log.info("initializing connection establisher")
         connectionEstablisher = new ConnectionEstablisher(eventBus, i2pConnector, props, connectionManager, hostCache)
@@ -218,17 +282,30 @@ public class Core {
             i2pAcceptor, hostCache, trustService, searchManager, uploadManager, connectionEstablisher)
 
         log.info("initializing directory watcher")
-        directoryWatcher = new DirectoryWatcher(eventBus, fileManager)
+        directoryWatcher = new DirectoryWatcher(eventBus, fileManager, home, props)
         eventBus.register(FileSharedEvent.class, directoryWatcher)
+        eventBus.register(AllFilesLoadedEvent.class, directoryWatcher)
+        eventBus.register(DirectoryUnsharedEvent.class, directoryWatcher)
 
         log.info("initializing hasher service")
         hasherService = new HasherService(new FileHasher(), eventBus, fileManager)
         eventBus.register(FileSharedEvent.class, hasherService)
+        eventBus.register(FileUnsharedEvent.class, hasherService)
+        eventBus.register(DirectoryUnsharedEvent.class, hasherService)
+
+        log.info("initializing trust subscriber")
+        trustSubscriber = new TrustSubscriber(eventBus, i2pConnector, props)
+        eventBus.register(UILoadedEvent.class, trustSubscriber)
+        eventBus.register(TrustSubscriptionEvent.class, trustSubscriber)
+        
+        log.info("initializing content manager")
+        contentManager = new ContentManager()
+        eventBus.register(ContentControlEvent.class, contentManager)
+        eventBus.register(QueryEvent.class, contentManager)
     }
 
     public void startServices() {
         hasherService.start()
-        directoryWatcher.start()
         trustService.start()
         trustService.waitForLoad()
         hostCache.start()
@@ -241,6 +318,12 @@ public class Core {
     }
 
     public void shutdown() {
+        if (!shutdown.compareAndSet(false, true)) {
+            log.info("already shutting down")
+            return
+        }
+        log.info("shutting down trust subscriber")
+        trustSubscriber.stop()
         log.info("shutting down download manageer")
         downloadManager.shutdown()
         log.info("shutting down connection acceeptor")
@@ -249,8 +332,14 @@ public class Core {
         connectionEstablisher.stop()
         log.info("shutting down directory watcher")
         directoryWatcher.stop()
+        log.info("shutting down cache client")
+        cacheClient.stop()
         log.info("shutting down connection manager")
         connectionManager.shutdown()
+        if (router != null) {
+            log.info("shutting down embedded router")
+            router.shutdown(0)
+        }
     }
 
     static main(args) {
@@ -277,7 +366,7 @@ public class Core {
             }
         }
 
-        Core core = new Core(props, home, "0.2.9")
+        Core core = new Core(props, home, "0.5.0")
         core.startServices()
 
         // ... at the end, sleep or execute script

core/src/main/groovy/com/muwire/core/EventBus.groovy

@@ -48,4 +48,9 @@ class EventBus {
         }
         currentHandlers.add handler
     }
+    
+    synchronized void unregister(Class<? extends Event> eventType, def handler) {
+        log.info("Unregistering $handler for type $eventType")
+        handlers[eventType]?.remove(handler)
+    }
 }

core/src/main/groovy/com/muwire/core/MuWireSettings.groovy

@@ -6,18 +6,32 @@ import com.muwire.core.hostcache.CrawlerResponse
 import com.muwire.core.util.DataUtil
 
 import net.i2p.data.Base64
+import net.i2p.util.ConcurrentHashSet
 
 class MuWireSettings {
 
     final boolean isLeaf
     boolean allowUntrusted
+    boolean searchExtraHop
+    boolean allowTrustLists
+    int trustListInterval
+    Set<Persona> trustSubscriptions
     int downloadRetryInterval
     int updateCheckInterval
+    boolean autoDownloadUpdate
+    String updateType
     String nickname
     File downloadLocation
     CrawlerResponse crawlerResponse
     boolean shareDownloadedFiles
     Set<String> watchedDirectories
+    float downloadSequentialRatio
+    int hostClearInterval, hostHopelessInterval, hostRejectInterval
+    int meshExpiration
+    boolean embeddedRouter
+    int inBw, outBw
+    Set<String> watchedKeywords
+    Set<String> watchedRegexes
 
     MuWireSettings() {
         this(new Properties())
@@ -25,20 +39,39 @@ class MuWireSettings {
 
     MuWireSettings(Properties props) {
         isLeaf = Boolean.valueOf(props.get("leaf","false"))
-		allowUntrusted = Boolean.valueOf(props.get("allowUntrusted","true"))
+        allowUntrusted = Boolean.valueOf(props.getProperty("allowUntrusted","true"))
+        searchExtraHop = Boolean.valueOf(props.getProperty("searchExtraHop","false"))
+        allowTrustLists = Boolean.valueOf(props.getProperty("allowTrustLists","true"))
+        trustListInterval = Integer.valueOf(props.getProperty("trustListInterval","1"))
         crawlerResponse = CrawlerResponse.valueOf(props.get("crawlerResponse","REGISTERED"))
         nickname = props.getProperty("nickname","MuWireUser")
         downloadLocation = new File((String)props.getProperty("downloadLocation",
             System.getProperty("user.home")))
-        downloadRetryInterval = Integer.parseInt(props.getProperty("downloadRetryInterval","5"))
-        updateCheckInterval = Integer.parseInt(props.getProperty("updateCheckInterval","36"))
+        downloadRetryInterval = Integer.parseInt(props.getProperty("downloadRetryInterval","60"))
+        updateCheckInterval = Integer.parseInt(props.getProperty("updateCheckInterval","24"))
+        autoDownloadUpdate = Boolean.parseBoolean(props.getProperty("autoDownloadUpdate","true"))
+        updateType = props.getProperty("updateType","jar")
         shareDownloadedFiles = Boolean.parseBoolean(props.getProperty("shareDownloadedFiles","true"))
+        downloadSequentialRatio = Float.valueOf(props.getProperty("downloadSequentialRatio","0.8"))
+        hostClearInterval = Integer.valueOf(props.getProperty("hostClearInterval","15"))
+        hostHopelessInterval = Integer.valueOf(props.getProperty("hostHopelessInterval", "1440"))
+        hostRejectInterval = Integer.valueOf(props.getProperty("hostRejectInterval", "1"))
+        meshExpiration = Integer.valueOf(props.getProperty("meshExpiration","60"))
+        embeddedRouter = Boolean.valueOf(props.getProperty("embeddedRouter","false"))
+        inBw = Integer.valueOf(props.getProperty("inBw","256"))
+        outBw = Integer.valueOf(props.getProperty("outBw","128"))
 
-        watchedDirectories = new HashSet<>()
-        if (props.containsKey("watchedDirectories")) {
-            String[] encoded = props.getProperty("watchedDirectories").split(",")
-            encoded.each { watchedDirectories << DataUtil.readi18nString(Base64.decode(it)) }
+        watchedDirectories = readEncodedSet(props, "watchedDirectories")
+        watchedKeywords = readEncodedSet(props, "watchedKeywords")
+        watchedRegexes = readEncodedSet(props, "watchedRegexes")
+
+        trustSubscriptions = new HashSet<>()
+        if (props.containsKey("trustSubscriptions")) {
+            props.getProperty("trustSubscriptions").split(",").each {
+                trustSubscriptions.add(new Persona(new ByteArrayInputStream(Base64.decode(it))))
             }
+        }
+        
         
     }
 
@@ -46,23 +79,58 @@ class MuWireSettings {
         Properties props = new Properties()
         props.setProperty("leaf", isLeaf.toString())
         props.setProperty("allowUntrusted", allowUntrusted.toString())
+        props.setProperty("searchExtraHop", String.valueOf(searchExtraHop))
+        props.setProperty("allowTrustLists", String.valueOf(allowTrustLists))
+        props.setProperty("trustListInterval", String.valueOf(trustListInterval))
         props.setProperty("crawlerResponse", crawlerResponse.toString())
         props.setProperty("nickname", nickname)
         props.setProperty("downloadLocation", downloadLocation.getAbsolutePath())
         props.setProperty("downloadRetryInterval", String.valueOf(downloadRetryInterval))
         props.setProperty("updateCheckInterval", String.valueOf(updateCheckInterval))
+        props.setProperty("autoDownloadUpdate", String.valueOf(autoDownloadUpdate))
+        props.setProperty("updateType",String.valueOf(updateType))
         props.setProperty("shareDownloadedFiles", String.valueOf(shareDownloadedFiles))
+        props.setProperty("downloadSequentialRatio", String.valueOf(downloadSequentialRatio))
+        props.setProperty("hostClearInterval", String.valueOf(hostClearInterval))
+        props.setProperty("hostHopelessInterval", String.valueOf(hostHopelessInterval))
+        props.setProperty("hostRejectInterval", String.valueOf(hostRejectInterval))
+        props.setProperty("meshExpiration", String.valueOf(meshExpiration))
+        props.setProperty("embeddedRouter", String.valueOf(embeddedRouter))
+        props.setProperty("inBw", String.valueOf(inBw))
+        props.setProperty("outBw", String.valueOf(outBw))
 
-        if (!watchedDirectories.isEmpty()) {
-            String encoded = watchedDirectories.stream().
-                map({Base64.encode(DataUtil.encodei18nString(it))}).
+        writeEncodedSet(watchedDirectories, "watchedDirectories", props)
+        writeEncodedSet(watchedKeywords, "watchedKeywords", props)
+        writeEncodedSet(watchedRegexes, "watchedRegexes", props)
+
+        if (!trustSubscriptions.isEmpty()) {
+            String encoded = trustSubscriptions.stream().
+                map({it.toBase64()}).
                 collect(Collectors.joining(","))
-            props.setProperty("watchedDirectories", encoded)
+            props.setProperty("trustSubscriptions", encoded)
         }
 
         props.store(out, "")
     }
     
+    private static Set<String> readEncodedSet(Properties props, String property) {
+        Set<String> rv = new ConcurrentHashSet<>()
+        if (props.containsKey(property)) {
+            String[] encoded = props.getProperty(property).split(",")
+            encoded.each { rv << DataUtil.readi18nString(Base64.decode(it)) }
+        }
+        rv
+    }
+    
+    private static void writeEncodedSet(Set<String> set, String property, Properties props) {
+        if (set.isEmpty())
+            return
+        String encoded = set.stream().
+            map({Base64.encode(DataUtil.encodei18nString(it))}).
+            collect(Collectors.joining(","))
+        props.setProperty(property, encoded)
+    }
+
     boolean isLeaf() {
         isLeaf
     }

core/src/main/groovy/com/muwire/core/Persona.groovy

@@ -82,4 +82,13 @@ public class Persona {
         Persona other = (Persona)o
         name.equals(other.name) && destination.equals(other.destination)
     }
+
+    public static void main(String []args) {
+        if (args.length != 1) {
+            println "This utility decodes a bas64-encoded persona"
+            System.exit(1)
+        }
+        Persona p = new Persona(new ByteArrayInputStream(Base64.decode(args[0])))
+        println p.getHumanReadableName()
+    }
 }

core/src/main/groovy/com/muwire/core/RouterDisconnectedEvent.groovy

@@ -0,0 +1,4 @@
+package com.muwire.core
+
+class RouterDisconnectedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/SplitPattern.groovy

@@ -0,0 +1,7 @@
+package com.muwire.core
+
+class SplitPattern {
+    
+    public static final String SPLIT_PATTERN = "[\\*\\+\\-,\\.:;\\(\\)=_/\\\\\\!\\\"\\\'\\\$%\\|\\[\\]\\{\\}\\?]";
+    
+}

core/src/main/groovy/com/muwire/core/connection/Connection.groovy

@@ -22,6 +22,9 @@ import net.i2p.data.Destination
 @Log
 abstract class Connection implements Closeable {
 
+    private static final int SEARCHES = 10
+    private static final long INTERVAL = 1000
+
     final EventBus eventBus
     final Endpoint endpoint
     final boolean incoming
@@ -32,6 +35,7 @@ abstract class Connection implements Closeable {
     private final AtomicBoolean running = new AtomicBoolean()
     private final BlockingQueue messages = new LinkedBlockingQueue()
     private final Thread reader, writer
+    private final LinkedList<Long> searchTimestamps = new LinkedList<>()
 
     protected final String name
 
@@ -156,7 +160,25 @@ abstract class Connection implements Closeable {
         }
     }
 
+    private boolean throttleSearch() {
+        final long now = System.currentTimeMillis()
+        if (searchTimestamps.size() < SEARCHES) {
+            searchTimestamps.addLast(now)
+            return false
+        }
+        Long oldest = searchTimestamps.getFirst()
+        if (now - oldest.longValue() < INTERVAL)
+            return true
+        searchTimestamps.addLast(now)
+        searchTimestamps.removeFirst()
+        false
+    }
+
     protected void handleSearch(def search) {
+        if (throttleSearch()) {
+            log.info("dropping excessive search")
+            return
+        }
         UUID uuid = UUID.fromString(search.uuid)
         byte [] infohash = null
         if (search.infohash != null) {

core/src/main/groovy/com/muwire/core/connection/ConnectionAcceptor.groovy

@@ -14,6 +14,7 @@ import com.muwire.core.hostcache.HostCache
 import com.muwire.core.trust.TrustLevel
 import com.muwire.core.trust.TrustService
 import com.muwire.core.upload.UploadManager
+import com.muwire.core.util.DataUtil
 import com.muwire.core.search.InvalidSearchResultException
 import com.muwire.core.search.ResultsParser
 import com.muwire.core.search.SearchManager
@@ -125,6 +126,9 @@ class ConnectionAcceptor {
                 case (byte)'P':
                     processPOST(e)
                     break
+                case (byte)'T':
+                    processTRUST(e)
+                    break
                 default:
                     throw new Exception("Invalid read $read")
             }
@@ -243,4 +247,43 @@ class ConnectionAcceptor {
         }
     }
 
+    private void processTRUST(Endpoint e) {
+        byte[] RUST = new byte[6]
+        DataInputStream dis = new DataInputStream(e.getInputStream())
+        dis.readFully(RUST)
+        if (RUST != "RUST\r\n".getBytes(StandardCharsets.US_ASCII))
+            throw new IOException("Invalid TRUST connection")
+        String header
+        while ((header = DataUtil.readTillRN(dis)) != ""); // ignore headers for now
+
+        OutputStream os = e.getOutputStream()
+        if (!settings.allowTrustLists) {
+            os.write("403 Not Allowed\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+            os.flush()
+            e.close()
+            return
+        }
+
+        os.write("200 OK\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+        List<Persona> good = new ArrayList<>(trustService.good.values())
+        int size = Math.min(Short.MAX_VALUE * 2, good.size())
+        good = good.subList(0, size)
+        DataOutputStream dos = new DataOutputStream(os)
+        dos.writeShort(size)
+        good.each {
+            it.write(dos)
+        }
+
+        List<Persona> bad = new ArrayList<>(trustService.bad.values())
+        size = Math.min(Short.MAX_VALUE * 2, bad.size())
+        bad = bad.subList(0, size)
+        dos.writeShort(size)
+        bad.each {
+            it.write(dos)
+        }
+
+        dos.flush()
+        e.close()
+    }
+
 }

core/src/main/groovy/com/muwire/core/connection/ConnectionEstablisher.groovy

@@ -31,7 +31,7 @@ class ConnectionEstablisher {
     final HostCache hostCache
 
     final Timer timer
-	final ExecutorService executor
+    final ExecutorService executor, closer
 
     final Set inProgress = new ConcurrentHashSet()
 
@@ -51,6 +51,8 @@ class ConnectionEstablisher {
             rv.setName("connector-${System.currentTimeMillis()}")
             rv
         } as ThreadFactory)
+        
+        closer = Executors.newSingleThreadExecutor()
     }
 
     void start() {
@@ -60,6 +62,7 @@ class ConnectionEstablisher {
     void stop() {
         timer.cancel()
         executor.shutdownNow()
+        closer.shutdown()
     }
 
     private void connectIfNeeded() {
@@ -120,8 +123,10 @@ class ConnectionEstablisher {
     }
 
     private void fail(Endpoint endpoint) {
+        closer.execute {
             endpoint.close()
             eventBus.publish(new ConnectionEvent(endpoint: endpoint, incoming: false, leaf: false, status: ConnectionAttemptStatus.FAILED))
+        } as Runnable
     }
 
     private void readK(Endpoint e) {
@@ -175,7 +180,7 @@ class ConnectionEstablisher {
             log.log(Level.WARNING,"Problem parsing post-rejection payload",ignore)
         } finally {
             // the end
-			e.close()
+            closer.execute({e.close()} as Runnable)
         }
     }
 

core/src/main/groovy/com/muwire/core/content/ContentControlEvent.groovy

@@ -0,0 +1,9 @@
+package com.muwire.core.content
+
+import com.muwire.core.Event
+
+class ContentControlEvent extends Event {
+    String term
+    boolean regex
+    boolean add
+}

core/src/main/groovy/com/muwire/core/content/ContentManager.groovy

@@ -0,0 +1,30 @@
+package com.muwire.core.content
+
+import java.util.concurrent.ConcurrentHashMap
+
+import com.muwire.core.search.QueryEvent
+
+import net.i2p.util.ConcurrentHashSet
+
+class ContentManager {
+
+    Set<Matcher> matchers = new ConcurrentHashSet()    
+    
+    void onContentControlEvent(ContentControlEvent e) {
+        Matcher m
+        if (e.regex)
+            m = new RegexMatcher(e.term)
+        else
+            m = new KeywordMatcher(e.term)
+        if (e.add)
+            matchers.add(m)
+        else
+            matchers.remove(m)
+    }
+    
+    void onQueryEvent(QueryEvent e) {
+        if (e.searchEvent.searchTerms == null)
+            return
+        matchers.each { it.process(e) }
+    }
+}

core/src/main/groovy/com/muwire/core/content/KeywordMatcher.groovy

@@ -0,0 +1,36 @@
+package com.muwire.core.content
+
+class KeywordMatcher extends Matcher {
+    private final String keyword
+    KeywordMatcher(String keyword) {
+        this.keyword = keyword
+    }
+    
+    @Override
+    protected boolean match(List<String> searchTerms) {
+        boolean found = false
+        searchTerms.each { 
+            if (keyword == it)
+                found = true
+        }
+        found
+    }
+    
+    @Override
+    public String getTerm() {
+        keyword
+    }
+    
+    @Override
+    public int hashCode() {
+        keyword.hashCode()
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (!(o instanceof KeywordMatcher))
+            return false
+        KeywordMatcher other = (KeywordMatcher) o
+        keyword.equals(other.keyword)
+    }
+}

core/src/main/groovy/com/muwire/core/content/Match.groovy

@@ -0,0 +1,9 @@
+package com.muwire.core.content
+
+import com.muwire.core.Persona
+
+class Match {
+    Persona persona
+    String [] keywords
+    long timestamp
+}

core/src/main/groovy/com/muwire/core/content/Matcher.groovy

@@ -0,0 +1,20 @@
+package com.muwire.core.content
+
+import com.muwire.core.search.QueryEvent
+
+abstract class Matcher {
+    final List<Match> matches = Collections.synchronizedList(new ArrayList<>())
+    final Set<UUID> uuids = new HashSet<>()
+    
+    protected abstract boolean match(List<String> searchTerms);
+    
+    public abstract String getTerm();
+    
+    public void process(QueryEvent qe) {
+        def terms = qe.searchEvent.searchTerms
+        if (match(terms) && uuids.add(qe.searchEvent.uuid)) {
+            long now = System.currentTimeMillis()
+            matches << new Match(persona : qe.originator, keywords : terms, timestamp : now)
+        }
+    }
+}

core/src/main/groovy/com/muwire/core/content/RegexMatcher.groovy

@@ -0,0 +1,35 @@
+package com.muwire.core.content
+
+import java.util.regex.Pattern
+import java.util.stream.Collectors
+
+class RegexMatcher extends Matcher {
+    private final Pattern pattern
+    RegexMatcher(String pattern) {
+        this.pattern = Pattern.compile(pattern)
+    }
+    
+    @Override
+    protected boolean match(List<String> keywords) {
+        String combined = keywords.join(" ")
+        return pattern.matcher(combined).find()
+    }
+    
+    @Override
+    public String getTerm() {
+        pattern.pattern()
+    }
+    
+    @Override
+    public int hashCode() {
+        pattern.pattern().hashCode()
+    }
+    
+    @Override
+    public boolean equals(Object o) {
+        if (!(o instanceof RegexMatcher))
+            return false
+        RegexMatcher other = (RegexMatcher) o
+        pattern.pattern() == other.pattern.pattern()
+    }
+}

core/src/main/groovy/com/muwire/core/download/DownloadManager.groovy

@@ -3,6 +3,10 @@ package com.muwire.core.download
 import com.muwire.core.connection.I2PConnector
 import com.muwire.core.files.FileDownloadedEvent
 import com.muwire.core.files.FileHasher
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.mesh.MeshManager
+import com.muwire.core.trust.TrustLevel
+import com.muwire.core.trust.TrustService
 import com.muwire.core.util.DataUtil
 
 import groovy.json.JsonBuilder
@@ -14,24 +18,33 @@ import net.i2p.util.ConcurrentHashSet
 
 import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
 import com.muwire.core.UILoadedEvent
 
+import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.Executor
 import java.util.concurrent.Executors
 
 public class DownloadManager {
 
     private final EventBus eventBus
+    private final TrustService trustService
+    private final MeshManager meshManager
+    private final MuWireSettings muSettings
     private final I2PConnector connector
     private final Executor executor
     private final File incompletes, home
     private final Persona me
 
-    private final Set<Downloader> downloaders = new ConcurrentHashSet<>()
+    private final Map<InfoHash, Downloader> downloaders = new ConcurrentHashMap<>()
 
-    public DownloadManager(EventBus eventBus, I2PConnector connector, File home, Persona me) {
+    public DownloadManager(EventBus eventBus, TrustService trustService, MeshManager meshManager, MuWireSettings muSettings,
+        I2PConnector connector, File home, Persona me) {
         this.eventBus = eventBus
+        this.trustService = trustService
+        this.meshManager = meshManager
+        this.muSettings = muSettings
         this.connector = connector
         this.incompletes = new File(home,"incompletes")
         this.home = home
@@ -61,17 +74,27 @@ public class DownloadManager {
         destinations.addAll(e.sources)
         destinations.remove(me.destination)
 
+        Pieces pieces = getPieces(infohash, size, pieceSize, e.sequential)
+
         def downloader = new Downloader(eventBus, this, me, e.target, size,
             infohash, pieceSize, connector, destinations,
-            incompletes)
-        downloaders.add(downloader)
+            incompletes, pieces)
+        downloaders.put(infohash, downloader)
         persistDownloaders()
         executor.execute({downloader.download()} as Runnable)
         eventBus.publish(new DownloadStartedEvent(downloader : downloader))
     }
 
     public void onUIDownloadCancelledEvent(UIDownloadCancelledEvent e) {
-        downloaders.remove(e.downloader)
+        downloaders.remove(e.downloader.infoHash)
+        persistDownloaders()
+    }
+
+    public void onUIDownloadPausedEvent(UIDownloadPausedEvent e) {
+        persistDownloaders()
+    }
+
+    public void onUIDownloadResumedEvent(UIDownloadResumedEvent e) {
         persistDownloaders()
     }
 
@@ -99,23 +122,58 @@ public class DownloadManager {
                 byte [] root = Base64.decode(json.hashRoot)
                 infoHash = new InfoHash(root)
             }
+            
+            boolean sequential = false
+            if (json.sequential != null)
+                sequential = json.sequential
+
+            Pieces pieces = getPieces(infoHash, (long)json.length, json.pieceSizePow2, sequential)
+
             def downloader = new Downloader(eventBus, this, me, file, (long)json.length,
-                infoHash, json.pieceSizePow2, connector, destinations, incompletes)
-            downloaders.add(downloader)
+                infoHash, json.pieceSizePow2, connector, destinations, incompletes, pieces)
+            if (json.paused != null)
+                downloader.paused = json.paused
+            downloaders.put(infoHash, downloader)
+            downloader.readPieces()
+            if (!downloader.paused)
                 downloader.download()
             eventBus.publish(new DownloadStartedEvent(downloader : downloader))
         }
     }
 
+    private Pieces getPieces(InfoHash infoHash, long length, int pieceSizePow2, boolean sequential) {
+        int pieceSize = 0x1 << pieceSizePow2
+        int nPieces = (int)(length / pieceSize)
+        if (length % pieceSize != 0)
+            nPieces++
+        Mesh mesh = meshManager.getOrCreate(infoHash, nPieces, sequential)
+        mesh.pieces
+    }
+
+    void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+        Downloader downloader = downloaders.get(e.infoHash)
+        if (downloader == null)
+            return
+        boolean ok = false
+        switch(trustService.getLevel(e.source.destination)) {
+            case TrustLevel.TRUSTED: ok = true; break
+            case TrustLevel.NEUTRAL: ok = muSettings.allowUntrusted; break
+            case TrustLevel.DISTRUSTED: ok = false; break
+        }
+
+        if (ok)
+            downloader.addSource(e.source.destination)
+    }
+
     void onFileDownloadedEvent(FileDownloadedEvent e) {
-        downloaders.remove(e.downloader)
+        downloaders.remove(e.downloader.infoHash)
         persistDownloaders()
     }
 
     private void persistDownloaders() {
         File downloadsFile = new File(home,"downloads.json")
         downloadsFile.withPrintWriter { writer ->
-            downloaders.each { downloader ->
+            downloaders.values().each { downloader ->
                 if (!downloader.cancelled) {
                     def json = [:]
                     json.file = Base64.encode(DataUtil.encodei18nString(downloader.file.getAbsolutePath()))
@@ -132,6 +190,11 @@ public class DownloadManager {
                         json.hashList = Base64.encode(infoHash.hashList)
                     else
                         json.hashRoot = Base64.encode(infoHash.getRoot())
+
+                    json.paused = downloader.paused
+                    
+                    json.sequential = downloader.pieces.ratio == 0f
+                    
                     writer.println(JsonOutput.toJson(json))
                 }
             }
@@ -139,7 +202,7 @@ public class DownloadManager {
     }
 
     public void shutdown() {
-        downloaders.each { it.stop() }
+        downloaders.values().each { it.stop() }
         Downloader.executorService.shutdownNow()
     }
 }

core/src/main/groovy/com/muwire/core/download/DownloadSession.groovy

@@ -3,13 +3,18 @@ package com.muwire.core.download;
 import net.i2p.data.Base64
 
 import com.muwire.core.Constants
+import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.Persona
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.util.DataUtil
+
 import static com.muwire.core.util.DataUtil.readTillRN
 
 import groovy.util.logging.Log
 
 import java.nio.ByteBuffer
+import java.nio.MappedByteBuffer
 import java.nio.channels.FileChannel
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
@@ -21,8 +26,7 @@ import java.util.logging.Level
 @Log
 class DownloadSession {
 
-    private static int SAMPLES = 10
-    
+    private final EventBus eventBus
     private final String meB64
     private final Pieces pieces
     private final InfoHash infoHash
@@ -30,15 +34,17 @@ class DownloadSession {
     private final File file
     private final int pieceSize
     private final long fileLength
+    private final Set<Integer> available
     private final MessageDigest digest
 
-    private final LinkedList<Long> timestamps = new LinkedList<>()
-    private final LinkedList<Integer> reads = new LinkedList<>()
+    private long lastSpeedRead = System.currentTimeMillis()
+    private long dataSinceLastRead
 
-    private ByteBuffer mapped
+    private MappedByteBuffer mapped
 
-    DownloadSession(String meB64, Pieces pieces, InfoHash infoHash, Endpoint endpoint, File file, 
-        int pieceSize, long fileLength) {
+    DownloadSession(EventBus eventBus, String meB64, Pieces pieces, InfoHash infoHash, Endpoint endpoint, File file,
+        int pieceSize, long fileLength, Set<Integer> available) {
+        this.eventBus = eventBus
         this.meB64 = meB64
         this.pieces = pieces
         this.endpoint = endpoint
@@ -46,6 +52,7 @@ class DownloadSession {
         this.file = file
         this.pieceSize = pieceSize
         this.fileLength = fileLength
+        this.available = available
         try {
             digest = MessageDigest.getInstance("SHA-256")
         } catch (NoSuchAlgorithmException impossible) {
@@ -63,60 +70,100 @@ class DownloadSession {
         OutputStream os = endpoint.getOutputStream()
         InputStream is = endpoint.getInputStream()
 
-        int piece = pieces.claim()
-        if (piece == -1)
+        int[] pieceAndPosition
+        if (available.isEmpty())
+            pieceAndPosition = pieces.claim()
+        else
+            pieceAndPosition = pieces.claim(new HashSet<>(available))
+        if (pieceAndPosition == null)
             return false
+        int piece = pieceAndPosition[0]
+        int position = pieceAndPosition[1]
+        boolean steal = pieceAndPosition[2] == 1
         boolean unclaim = true
 
-        log.info("will download piece $piece")
-        
-        long start = piece * pieceSize
-        long end = Math.min(fileLength, start + pieceSize) - 1
-        long length = end - start + 1
+        log.info("will download piece $piece from position $position steal $steal")
 
+        long pieceStart = piece * ((long)pieceSize)
+        long end = Math.min(fileLength, pieceStart + pieceSize) - 1
+        long start = pieceStart + position
         String root = Base64.encode(infoHash.getRoot())
 
         try {
             os.write("GET $root\r\n".getBytes(StandardCharsets.US_ASCII))
             os.write("Range: $start-$end\r\n".getBytes(StandardCharsets.US_ASCII))
-            os.write("X-Persona: $meB64\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+            os.write("X-Persona: $meB64\r\n".getBytes(StandardCharsets.US_ASCII))
+            String xHave = DataUtil.encodeXHave(pieces.getDownloaded(), pieces.nPieces)
+            os.write("X-Have: $xHave\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
             os.flush()
-            String code = readTillRN(is)
-            if (code.startsWith("404 ")) {
+            String codeString = readTillRN(is)
+            int space = codeString.indexOf(' ')
+            if (space > 0)
+                codeString = codeString.substring(0, space)
+
+            int code = Integer.parseInt(codeString.trim())
+
+            if (code == 404) {
                 log.warning("file not found")
                 endpoint.close()
                 return false
             }
 
-            if (code.startsWith("416 ")) {
-                log.warning("range $start-$end cannot be satisfied")
-                return // leave endpoint open
-            }
-            
-            if (!code.startsWith("200 ")) {
+            if (!(code == 200 || code == 416)) {
                 log.warning("unknown code $code")
                 endpoint.close()
                 return false
             }
 
             // parse all headers
-            Set<String> headers = new HashSet<>()
+            Map<String,String> headers = new HashMap<>()
             String header
-            while((header = readTillRN(is)) != "" && headers.size() < Constants.MAX_HEADERS) 
-                headers.add(header)
-
-            long receivedStart = -1
-            long receivedEnd = -1
-            for (String receivedHeader : headers) {
-                def group = (receivedHeader =~ /^Content-Range: (\d+)-(\d+)$/)
-                if (group.size() != 1) {
-                    log.info("ignoring header $receivedHeader")
-                    continue
+            while((header = readTillRN(is)) != "" && headers.size() < Constants.MAX_HEADERS) {
+                int colon = header.indexOf(':')
+                if (colon == -1 || colon == header.length() - 1)
+                    throw new IOException("invalid header $header")
+                String key = header.substring(0, colon)
+                String value = header.substring(colon + 1)
+                headers[key] = value.trim()
             }
 
-                receivedStart = Long.parseLong(group[0][1])
-                receivedEnd = Long.parseLong(group[0][2])
+            // prase X-Alt if present
+            if (headers.containsKey("X-Alt")) {
+                headers["X-Alt"].split(",").each {
+                    if (it.length() > 0) {
+                        byte [] raw = Base64.decode(it)
+                        Persona source = new Persona(new ByteArrayInputStream(raw))
+                        eventBus.publish(new SourceDiscoveredEvent(infoHash : infoHash, source : source))
                     }
+                }
+            }
+
+            // parse X-Have if present
+            if (headers.containsKey("X-Have")) {
+                DataUtil.decodeXHave(headers["X-Have"]).each {
+                    available.add(it)
+                }
+                if (!available.contains(piece))
+                    return true // try again next time
+            } else {
+                if (code != 200)
+                    throw new IOException("Code $code but no X-Have")
+                available.clear()
+            }
+
+            if (code != 200)
+                return true
+
+            String range = headers["Content-Range"]
+            if (range == null)
+                throw new IOException("Code 200 but no Content-Range")
+
+            def group = (range =~ /^(\d+)-(\d+)$/)
+            if (group.size() != 1)
+                throw new IOException("invalid Content-Range header $range")
+
+            long receivedStart = Long.parseLong(group[0][1])
+            long receivedEnd = Long.parseLong(group[0][2])
 
             if (receivedStart != start || receivedEnd != end) {
                 log.warning("We don't support mismatching ranges yet")
@@ -128,8 +175,9 @@ class DownloadSession {
             FileChannel channel
             try {
                 channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ, StandardOpenOption.WRITE,
-                        StandardOpenOption.SPARSE, StandardOpenOption.CREATE)) // TODO: double-check, maybe CREATE_NEW
-                mapped = channel.map(FileChannel.MapMode.READ_WRITE, start, end - start + 1)
+                        StandardOpenOption.SPARSE, StandardOpenOption.CREATE)) 
+                mapped = channel.map(FileChannel.MapMode.READ_WRITE, pieceStart, end - pieceStart + 1)
+                mapped.position(position)
 
                 byte[] tmp = new byte[0x1 << 13]
                 while(mapped.hasRemaining()) {
@@ -140,13 +188,8 @@ class DownloadSession {
                         throw new IOException()
                     synchronized(this) {
                         mapped.put(tmp, 0, read)
-
-                        if (timestamps.size() == SAMPLES) {
-                            timestamps.removeFirst()
-                            reads.removeFirst()
-                        }
-                        timestamps.addLast(System.currentTimeMillis())
-                        reads.addLast(read)
+                        dataSinceLastRead += read
+                        pieces.markPartial(piece, mapped.position())
                     }
                 }
 
@@ -155,15 +198,18 @@ class DownloadSession {
                 byte [] hash = digest.digest()
                 byte [] expected = new byte[32]
                 System.arraycopy(infoHash.getHashList(), piece * 32, expected, 0, 32)
-                if (hash != expected)
-                    throw new BadHashException()
+                if (hash != expected) {
+                    pieces.markPartial(piece, 0)
+                    throw new BadHashException("bad hash on piece $piece")
+                }
             } finally {
                 try { channel?.close() } catch (IOException ignore) {}
+                DataUtil.tryUnmap(mapped)
             }
             pieces.markDownloaded(piece)
             unclaim = false
         } finally {
-            if (unclaim)
+            if (unclaim && !steal) 
                 pieces.unclaim(piece)
         }
         return true
@@ -176,24 +222,11 @@ class DownloadSession {
     }
 
     synchronized int speed() {
-        if (timestamps.size() < SAMPLES)
-            return 0
-        int totalRead = 0
-        int idx = 0
         final long now = System.currentTimeMillis()
-        
-        while(idx < SAMPLES && timestamps.get(idx) < now - 1000)
-            idx++
-        if (idx == SAMPLES)
-            return 0
-        if (idx == SAMPLES - 1)
-            return reads[idx]
-            
-        long interval = timestamps.last - timestamps[idx]
-        if (interval == 0) 
-            interval = 1
-        for (int i = idx; i < SAMPLES; i++)
-            totalRead += reads[idx]
-        (int)(totalRead * 1000.0 / interval)
+        long interval = Math.max(1000, now - lastSpeedRead)
+        lastSpeedRead = now;
+        int rv = (int) (dataSinceLastRead * 1000.0 / interval)
+        dataSinceLastRead = 0
+        rv
     }
 }

core/src/main/groovy/com/muwire/core/download/Downloader.groovy

@@ -7,6 +7,7 @@ import com.muwire.core.connection.Endpoint
 import java.nio.file.AtomicMoveNotSupportedException
 import java.nio.file.Files
 import java.nio.file.StandardCopyOption
+import java.time.Instant
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
@@ -18,6 +19,7 @@ import com.muwire.core.DownloadedFile
 import com.muwire.core.EventBus
 import com.muwire.core.connection.I2PConnector
 import com.muwire.core.files.FileDownloadedEvent
+import com.muwire.core.util.DataUtil
 
 import groovy.util.logging.Log
 import net.i2p.data.Destination
@@ -25,7 +27,7 @@ import net.i2p.util.ConcurrentHashSet
 
 @Log
 public class Downloader {
-    public enum DownloadState { CONNECTING, HASHLIST, DOWNLOADING, FAILED, CANCELLED, FINISHED }
+    public enum DownloadState { CONNECTING, HASHLIST, DOWNLOADING, FAILED, CANCELLED, PAUSED, FINISHED }
     private enum WorkerState { CONNECTING, HASHLIST, DOWNLOADING, FINISHED}
 
     private static final ExecutorService executorService = Executors.newCachedThreadPool({r ->
@@ -53,14 +55,19 @@ public class Downloader {
     private final Set<Destination> successfulDestinations = new ConcurrentHashSet<>()
 
 
-    private volatile boolean cancelled
+    private volatile boolean cancelled, paused
     private final AtomicBoolean eventFired = new AtomicBoolean()
     private boolean piecesFileClosed
 
+    private ArrayList speedArr = new ArrayList<Integer>()
+    private int speedPos = 0
+    private int speedAvg = 0
+    private long timestamp = Instant.now().toEpochMilli()
+
     public Downloader(EventBus eventBus, DownloadManager downloadManager,
         Persona me, File file, long length, InfoHash infoHash,
         int pieceSizePow2, I2PConnector connector, Set<Destination> destinations,
-        File incompletes) {
+        File incompletes, Pieces pieces) {
         this.eventBus = eventBus
         this.me = me
         this.downloadManager = downloadManager
@@ -73,15 +80,12 @@ public class Downloader {
         this.incompleteFile = new File(incompletes, file.getName()+".part")
         this.pieceSizePow2 = pieceSizePow2
         this.pieceSize = 1 << pieceSizePow2
+        this.pieces = pieces
+        this.nPieces = pieces.nPieces
 
-        int nPieces
-        if (length % pieceSize == 0)
-            nPieces = length / pieceSize
-        else
-            nPieces = length / pieceSize + 1
-        this.nPieces = nPieces
-        
-        pieces = new Pieces(nPieces, Constants.DOWNLOAD_SEQUENTIAL_RATIO)
+        // default size suitable for an average of 5 seconds / 5 elements / 5 interval units
+        // it's easily adjustable by resizing the size of speedArr
+        this.speedArr = [ 0, 0, 0, 0, 0 ]
     }
 
     public synchronized InfoHash getInfoHash() {
@@ -107,8 +111,14 @@ public class Downloader {
         if (!piecesFile.exists())
             return
         piecesFile.eachLine {
-            int piece = Integer.parseInt(it)
+            String [] split = it.split(",")
+            int piece = Integer.parseInt(split[0])
+            if (split.length == 1)
                 pieces.markDownloaded(piece)
+            else {
+                int position = Integer.parseInt(split[1])
+                pieces.markPartial(piece, position)
+            }
         }
     }
 
@@ -117,9 +127,7 @@ public class Downloader {
             if (piecesFileClosed)
                 return
             piecesFile.withPrintWriter { writer ->
-                pieces.getDownloaded().each { piece ->
-                    writer.println(piece)
-                }
+                pieces.write(writer)
             }
         }
     }
@@ -130,19 +138,43 @@ public class Downloader {
 
 
     public int speed() {
-        int total = 0
+        int currSpeed = 0
         if (getCurrentState() == DownloadState.DOWNLOADING) {
             activeWorkers.values().each {
                 if (it.currentState == WorkerState.DOWNLOADING)
-                    total += it.speed()
+                    currSpeed += it.speed()
             }
         }
-        total
+
+        // normalize to speedArr.size
+        currSpeed /= speedArr.size()
+
+        // compute new speedAvg and update speedArr
+        if ( speedArr[speedPos] > speedAvg ) {
+            speedAvg = 0
+        } else {
+            speedAvg -= speedArr[speedPos]
+        }
+        speedAvg += currSpeed
+        speedArr[speedPos] = currSpeed
+        // this might be necessary due to rounding errors
+        if (speedAvg < 0)
+            speedAvg = 0
+
+        // rolling index over the speedArr
+        speedPos++
+        if (speedPos >= speedArr.size())
+            speedPos=0
+
+        speedAvg
     }
 
     public DownloadState getCurrentState() {
         if (cancelled)
             return DownloadState.CANCELLED
+        if (paused)
+            return DownloadState.PAUSED
+
         boolean allFinished = true
         activeWorkers.values().each {
             allFinished &= it.currentState == WorkerState.FINISHED
@@ -187,6 +219,12 @@ public class Downloader {
             piecesFile.delete()
         }
         incompleteFile.delete()
+        pieces.clearAll()
+    }
+
+    public void pause() {
+        paused = true
+        stop()
     }
 
     void stop() {
@@ -205,6 +243,8 @@ public class Downloader {
     }
 
     public void resume() {
+        paused = false
+        readPieces()
         destinations.each { destination ->
             def worker = activeWorkers.get(destination)
             if (worker != null) {
@@ -221,12 +261,21 @@ public class Downloader {
         }
     }
 
+    void addSource(Destination d) {
+        if (activeWorkers.containsKey(d))
+            return
+        DownloadWorker newWorker = new DownloadWorker(d)
+        activeWorkers.put(d, newWorker)
+        executorService.submit(newWorker)
+    }
+
     class DownloadWorker implements Runnable {
         private final Destination destination
         private volatile WorkerState currentState
         private volatile Thread downloadThread
         private Endpoint endpoint
         private volatile DownloadSession currentSession
+        private final Set<Integer> available = new HashSet<>()
 
         DownloadWorker(Destination destination) {
             this.destination = destination
@@ -247,7 +296,8 @@ public class Downloader {
                 currentState = WorkerState.DOWNLOADING
                 boolean requestPerformed
                 while(!pieces.isComplete()) {
-                    currentSession = new DownloadSession(me.toBase64(), pieces, getInfoHash(), endpoint, incompleteFile, pieceSize, length)
+                    currentSession = new DownloadSession(eventBus, me.toBase64(), pieces, getInfoHash(),
+                        endpoint, incompleteFile, pieceSize, length, available)
                     requestPerformed = currentSession.request()
                     if (!requestPerformed)
                         break
@@ -255,14 +305,19 @@ public class Downloader {
                     writePieces()
                 }
             } catch (Exception bad) {
-                log.log(Level.WARNING,"Exception while downloading",bad)
+                log.log(Level.WARNING,"Exception while downloading",DataUtil.findRoot(bad))
             } finally {
+                writePieces()
                 currentState = WorkerState.FINISHED
                 if (pieces.isComplete() && eventFired.compareAndSet(false, true)) {
                     synchronized(piecesFile) {
                         piecesFileClosed = true
                         piecesFile.delete()
                     }
+                    activeWorkers.values().each { 
+                        if (it.destination != destination)
+                            it.cancel()
+                    }
                     try {
                         Files.move(incompleteFile.toPath(), file.toPath(), StandardCopyOption.ATOMIC_MOVE)
                     } catch (AtomicMoveNotSupportedException e) {
@@ -271,7 +326,7 @@ public class Downloader {
                     }
                     eventBus.publish(
                         new FileDownloadedEvent(
-                            downloadedFile : new DownloadedFile(file, getInfoHash(), pieceSizePow2, successfulDestinations),
+                            downloadedFile : new DownloadedFile(file.getCanonicalFile(), getInfoHash(), pieceSizePow2, successfulDestinations),
                         downloader : Downloader.this))
 
                 }

core/src/main/groovy/com/muwire/core/download/Pieces.groovy

@@ -5,6 +5,7 @@ class Pieces {
     private final int nPieces
     private final float ratio
     private final Random random = new Random()
+    private final Map<Integer,Integer> partials = new HashMap<>()
 
     Pieces(int nPieces) {
         this(nPieces, 1.0f)
@@ -17,16 +18,22 @@ class Pieces {
         claimed = new BitSet(nPieces)
     }
     
-    synchronized int claim() {
+    synchronized int[] claim() {
         int claimedCardinality = claimed.cardinality()
-        if (claimedCardinality == nPieces)
-            return -1
+        if (claimedCardinality == nPieces) {
+            // steal
+            int downloadedCardinality = done.cardinality()
+            if (downloadedCardinality == nPieces)
+                return null
+            int rv = done.nextClearBit(0)
+            return [rv, partials.getOrDefault(rv, 0), 1]
+        }
 
         // if fuller than ratio just do sequential
-        if ( (1.0f * claimedCardinality) / nPieces > ratio) {
+        if ( (1.0f * claimedCardinality) / nPieces >= ratio) {
             int rv = claimed.nextClearBit(0)
             claimed.set(rv)
-            return rv
+            return [rv, partials.getOrDefault(rv, 0), 0]
         }
 
         while(true) {
@@ -34,10 +41,31 @@ class Pieces {
             if (claimed.get(start))
                 continue
             claimed.set(start)
-            return start
+            return [start, partials.getOrDefault(start,0), 0]
         }
     }
 
+    synchronized int[] claim(Set<Integer> available) {
+        for (int i = done.nextSetBit(0); i >= 0; i = done.nextSetBit(i+1))
+            available.remove(i)
+        if (available.isEmpty())
+            return null
+        Set<Integer> availableCopy = new HashSet<>(available)
+        for (int i = claimed.nextSetBit(0); i >= 0; i = claimed.nextSetBit(i+1))
+            availableCopy.remove(i)
+        if (availableCopy.isEmpty()) {
+            // steal
+            int rv = available.first()
+            return [rv, partials.getOrDefault(rv, 0), 1]
+        }
+        List<Integer> toList = availableCopy.toList()
+        if (ratio > 0f)
+            Collections.shuffle(toList)
+        int rv = toList[0]
+        claimed.set(rv)
+        [rv, partials.getOrDefault(rv, 0), 0]
+    }
+
     synchronized def getDownloaded() {
         def rv = []
         for (int i = done.nextSetBit(0); i >= 0; i = done.nextSetBit(i+1)) {
@@ -49,6 +77,11 @@ class Pieces {
     synchronized void markDownloaded(int piece) {
         done.set(piece)
         claimed.set(piece)
+        partials.remove(piece)
+    }
+    
+    synchronized void markPartial(int piece, int position) {
+        partials.put(piece, position)
     }
 
     synchronized void unclaim(int piece) {
@@ -62,4 +95,23 @@ class Pieces {
     synchronized int donePieces() {
         done.cardinality()
     }
+
+    synchronized boolean isDownloaded(int piece) {
+        done.get(piece)
+    }
+
+    synchronized void clearAll() {
+        done.clear()
+        claimed.clear()
+        partials.clear()
+    }
+    
+    synchronized void write(PrintWriter writer) {
+        for (int i = done.nextSetBit(0); i >= 0; i = done.nextSetBit(i+1)) {
+            writer.println(i)
+        }
+        partials.each { piece, position ->
+            writer.println("$piece,$position")
+        }
+    }
 }

core/src/main/groovy/com/muwire/core/download/SourceDiscoveredEvent.groovy

@@ -0,0 +1,10 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+
+class SourceDiscoveredEvent extends Event {
+    InfoHash infoHash
+    Persona source
+}

core/src/main/groovy/com/muwire/core/download/UIDownloadEvent.groovy

@@ -10,4 +10,5 @@ class UIDownloadEvent extends Event {
     UIResultEvent[] result
     Set<Destination> sources
     File target
+    boolean sequential
 }

core/src/main/groovy/com/muwire/core/download/UIDownloadPausedEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+
+class UIDownloadPausedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/download/UIDownloadResumedEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.download
+
+import com.muwire.core.Event
+
+class UIDownloadResumedEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/files/DirectoryUnsharedEvent.groovy

@@ -0,0 +1,7 @@
+package com.muwire.core.files
+
+import com.muwire.core.Event
+
+class DirectoryUnsharedEvent extends Event {
+    File directory
+}

core/src/main/groovy/com/muwire/core/files/DirectoryWatcher.groovy

@@ -13,6 +13,7 @@ import java.nio.file.WatchService
 import java.util.concurrent.ConcurrentHashMap
 
 import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
 import com.muwire.core.SharedFile
 
 import groovy.util.logging.Log
@@ -31,14 +32,19 @@ class DirectoryWatcher {
             kinds = [ENTRY_CREATE, ENTRY_MODIFY, ENTRY_DELETE]
     }
 
+    private final File home
+    private final MuWireSettings muOptions
     private final EventBus eventBus
     private final FileManager fileManager
     private final Thread watcherThread, publisherThread
     private final Map<File, Long> waitingFiles = new ConcurrentHashMap<>()
+    private final Map<File, WatchKey> watchedDirectories = new ConcurrentHashMap<>()
     private WatchService watchService
     private volatile boolean shutdown
 
-    DirectoryWatcher(EventBus eventBus, FileManager fileManager) {
+    DirectoryWatcher(EventBus eventBus, FileManager fileManager, File home, MuWireSettings muOptions) {
+        this.home = home
+        this.muOptions = muOptions
         this.eventBus = eventBus
         this.fileManager = fileManager
         this.watcherThread = new Thread({watch() } as Runnable, "directory-watcher")
@@ -47,7 +53,7 @@ class DirectoryWatcher {
         publisherThread.setDaemon(true)
     }
 
-    void start() {
+    void onAllFilesLoadedEvent(AllFilesLoadedEvent e) {
         watchService = FileSystems.getDefault().newWatchService()
         watcherThread.start()
         publisherThread.start()
@@ -55,17 +61,36 @@ class DirectoryWatcher {
 
     void stop() {
         shutdown = true
-        watcherThread.interrupt()
-        publisherThread.interrupt()
-        watchService.close()
+        watcherThread?.interrupt()
+        publisherThread?.interrupt()
+        watchService?.close()
     }
 
     void onFileSharedEvent(FileSharedEvent e) {
         if (!e.file.isDirectory())
             return
-        Path path = e.file.getCanonicalFile().toPath()
-        path.register(watchService, kinds)
+        File canonical = e.file.getCanonicalFile()
+        Path path = canonical.toPath()
+        WatchKey wk = path.register(watchService, kinds)
+        watchedDirectories.put(canonical, wk)
         
+        if (muOptions.watchedDirectories.add(canonical.toString()))
+            saveMuSettings()
+    }
+
+    void onDirectoryUnsharedEvent(DirectoryUnsharedEvent e) {
+        WatchKey wk = watchedDirectories.remove(e.directory)
+        wk?.cancel()
+        
+        if (muOptions.watchedDirectories.remove(e.directory.toString()))
+            saveMuSettings()
+    }
+    
+    private void saveMuSettings() {
+        File muSettingsFile = new File(home, "MuWire.properties")
+        muSettingsFile.withOutputStream {
+            muOptions.write(it)
+        }
     }
 
     private void watch() {
@@ -113,7 +138,7 @@ class DirectoryWatcher {
 
     private static File join(Path parent, Path path) {
         File parentFile = parent.toFile().getCanonicalFile()
-        new File(parentFile, path.toFile().getName())
+        new File(parentFile, path.toFile().getName()).getCanonicalFile()
     }
 
     private void publish() {

core/src/main/groovy/com/muwire/core/files/FileHashedEvent.groovy

@@ -7,4 +7,10 @@ class FileHashedEvent extends Event {
 
     SharedFile sharedFile
     String error
+
+    @Override
+    public String toString() {
+        super.toString() + " sharedFile " + sharedFile?.file.getAbsolutePath() + " error: $error"
+    }
+
 }

core/src/main/groovy/com/muwire/core/files/FileHasher.groovy

@@ -1,6 +1,7 @@
 package com.muwire.core.files
 
 import com.muwire.core.InfoHash
+import com.muwire.core.util.DataUtil
 
 import net.i2p.data.Base64
 
@@ -18,6 +19,8 @@ class FileHasher {
     /**
      * @param size of the file to be shared
      * @return the size of each piece in power of 2
+     * piece size is minimum 128 KBytees and maximum 16 MBytes in power of 2 steps (2^17 - 2^24)
+     * there can be up to 8192 pieces maximum per file
      */
     static int getPieceSize(long size) {
         if (size <= 0x1 << 30)
@@ -57,6 +60,7 @@ class FileHasher {
             for (int i = 0; i < numPieces - 1; i++) {
                 buf = raf.getChannel().map(MapMode.READ_ONLY, ((long)size) * i, size)
                 digest.update buf
+                DataUtil.tryUnmap(buf)
                 output.write(digest.digest(), 0, 32)
             }
             def lastPieceLength = length - (numPieces - 1) * ((long)size)

core/src/main/groovy/com/muwire/core/files/FileHashingEvent.groovy

@@ -0,0 +1,15 @@
+package com.muwire.core.files
+
+import com.muwire.core.Event
+import com.muwire.core.SharedFile
+
+class FileHashingEvent extends Event {
+
+    File hashingFile
+
+    @Override
+    public String toString() {
+        super.toString() + " hashingFile " + hashingFile.getAbsolutePath()
+    }
+
+}

core/src/main/groovy/com/muwire/core/files/FileManager.groovy

@@ -135,4 +135,16 @@ class FileManager {
         }
         rv
     }
+
+    void onDirectoryUnsharedEvent(DirectoryUnsharedEvent e) {
+        e.directory.listFiles().each {
+            if (it.isDirectory())
+                eventBus.publish(new DirectoryUnsharedEvent(directory : it))
+            else {
+                SharedFile sf = fileToSharedFile.get(it)
+                if (sf != null)
+                    eventBus.publish(new FileUnsharedEvent(unsharedFile : sf))
+            }
+        }
+    }
 }

core/src/main/groovy/com/muwire/core/files/FileSharedEvent.groovy

@@ -5,4 +5,9 @@ import com.muwire.core.Event
 class FileSharedEvent extends Event {
 
     File file
+
+    @Override
+    public String toString() {
+        return super.toString() + " file: "+file.getAbsolutePath()
+    }
 }

core/src/main/groovy/com/muwire/core/files/HasherService.groovy

@@ -11,6 +11,7 @@ class HasherService {
     final FileHasher hasher
     final EventBus eventBus
     final FileManager fileManager
+    final Set<File> hashed = new HashSet<>()
     Executor executor
 
     HasherService(FileHasher hasher, EventBus eventBus, FileManager fileManager) {
@@ -24,13 +25,22 @@ class HasherService {
     }
 
     void onFileSharedEvent(FileSharedEvent evt) {
-        if (fileManager.fileToSharedFile.containsKey(evt.file))
+        File canonical = evt.file.getCanonicalFile()
+        if (fileManager.fileToSharedFile.containsKey(canonical)) 
             return
-		executor.execute( { -> process(evt.file) } as Runnable)
+        if (hashed.add(canonical))
+            executor.execute( { -> process(canonical) } as Runnable)
+    }
+    
+    void onFileUnsharedEvent(FileUnsharedEvent evt) {
+        hashed.remove(evt.unsharedFile.file)
+    }
+    
+    void onDirectoryUnsharedEvent(DirectoryUnsharedEvent evt) {
+        hashed.remove(evt.directory)
     }
 
     private void process(File f) {
-		f = f.getCanonicalFile()
         if (f.isDirectory()) {
             f.listFiles().each {eventBus.publish new FileSharedEvent(file: it) }
         } else {
@@ -39,6 +49,7 @@ class HasherService {
             } else if (f.length() > FileHasher.MAX_SIZE) {
                 eventBus.publish new FileHashedEvent(error: "$f is too large to be shared ${f.length()}")
             } else {
+                eventBus.publish new FileHashingEvent(hashingFile: f)
                 def hash = hasher.hashFile f
                 eventBus.publish new FileHashedEvent(sharedFile: new SharedFile(f, hash, FileHasher.getPieceSize(f.length())))
             }

core/src/main/groovy/com/muwire/core/files/PersisterService.groovy

@@ -3,6 +3,9 @@ package com.muwire.core.files
 import java.nio.file.CopyOption
 import java.nio.file.Files
 import java.nio.file.StandardCopyOption
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+import java.util.concurrent.ThreadFactory
 import java.util.logging.Level
 import java.util.stream.Collectors
 
@@ -28,13 +31,16 @@ class PersisterService extends Service {
     final int interval
     final Timer timer
     final FileManager fileManager
+    final ExecutorService persisterExecutor = Executors.newSingleThreadExecutor({ r -> 
+        new Thread(r, "file persister")
+    } as ThreadFactory)
 
     PersisterService(File location, EventBus listener, int interval, FileManager fileManager) {
         this.location = location
         this.listener = listener
         this.interval = interval
         this.fileManager = fileManager
-		timer = new Timer("file persister", true)
+        timer = new Timer("file persister timer", true)
     }
 
     void stop() {
@@ -45,8 +51,15 @@ class PersisterService extends Service {
         timer.schedule({load()} as TimerTask, 1)
     }
     
+    void onUIPersistFilesEvent(UIPersistFilesEvent e) {
+        persistFiles()
+    }
+
     void load() {
+        Thread.currentThread().setPriority(Thread.MIN_PRIORITY)
+
         if (location.exists() && location.isFile()) {
+            int loaded = 0
             def slurper = new JsonSlurper()
             try {
                 location.eachLine {
@@ -56,6 +69,9 @@ class PersisterService extends Service {
                         if (event != null) {
                             log.fine("loaded file $event.loadedFile.file")
                             listener.publish event
+                            loaded++
+                            if (loaded % 10 == 0)
+                                Thread.sleep(20)
                         }
                     }
                 }
@@ -109,16 +125,19 @@ class PersisterService extends Service {
             List sources = (List)json.sources
             Set<Destination> sourceSet = sources.stream().map({d -> new Destination(d.toString())}).collect Collectors.toSet()
             DownloadedFile df = new DownloadedFile(file, ih, pieceSize, sourceSet)
+            df.setComment(json.comment)
             return new FileLoadedEvent(loadedFile : df)
         }
 
 
         SharedFile sf = new SharedFile(file, ih, pieceSize)
+        sf.setComment(json.comment)
         return new FileLoadedEvent(loadedFile: sf)
 
     }
 
     private void persistFiles() {
+        persisterExecutor.submit( {
             def sharedFiles = fileManager.getSharedFiles()
 
             File tmp = File.createTempFile("muwire-files", "tmp")
@@ -132,21 +151,18 @@ class PersisterService extends Service {
             }
             Files.copy(tmp.toPath(), location.toPath(), StandardCopyOption.REPLACE_EXISTING)
             tmp.delete()
+        } as Runnable)
     }
 
     private def toJson(File f, SharedFile sf) {
         def json = [:]
-		json.file = Base64.encode DataUtil.encodei18nString(f.getCanonicalFile().toString())
-		json.length = f.length()
+        json.file = sf.getB64EncodedFileName()
+        json.length = sf.getCachedLength()
         InfoHash ih = sf.getInfoHash()
-		json.infoHash = Base64.encode ih.getRoot()
+        json.infoHash = sf.getB64EncodedHashRoot()
         json.pieceSize = sf.getPieceSize()
-		byte [] tmp = new byte [32]
-		json.hashList = []
-		for (int i = 0;i < ih.getHashList().length / 32; i++) {
-			System.arraycopy(ih.getHashList(), i * 32, tmp, 0, 32)
-			json.hashList.add Base64.encode(tmp)
-		}
+        json.hashList = sf.getB64EncodedHashList()
+        json.comment = sf.getComment()
 
         if (sf instanceof DownloadedFile) {
             json.sources = sf.sources.stream().map( {d -> d.toBase64()}).collect(Collectors.toList())

core/src/main/groovy/com/muwire/core/files/UIPersistFilesEvent.groovy

@@ -0,0 +1,6 @@
+package com.muwire.core.files
+
+import com.muwire.core.Event
+
+class UIPersistFilesEvent extends Event {
+}

core/src/main/groovy/com/muwire/core/hostcache/CacheServers.groovy

@@ -6,7 +6,12 @@ class CacheServers {
 
     private static final int TO_GIVE = 3
     private static Set<Destination> CACHES = [
-			new Destination("Wddh2E6FyyXBF7SvUYHKdN-vjf3~N6uqQWNeBDTM0P33YjiQCOsyedrjmDZmWFrXUJfJLWnCb5bnKezfk4uDaMyj~uvDG~yvLVcFgcPWSUd7BfGgym-zqcG1q1DcM8vfun-US7YamBlmtC6MZ2j-~Igqzmgshita8aLPCfNAA6S6e2UMjjtG7QIXlxpMec75dkHdJlVWbzrk9z8Qgru3YIk0UztYgEwDNBbm9wInsbHhr3HtAfa02QcgRVqRN2PnQXuqUJs7R7~09FZPEviiIcUpkY3FeyLlX1sgQFBeGeA96blaPvZNGd6KnNdgfLgMebx5SSxC-N4KZMSMBz5cgonQF3~m2HHFRSI85zqZNG5X9bJN85t80ltiv1W1es8ZnQW4es11r7MrvJNXz5bmSH641yJIvS6qI8OJJNpFVBIQSXLD-96TayrLQPaYw~uNZ-eXaE6G5dYhiuN8xHsFI1QkdaUaVZnvDGfsRbpS5GtpUbBDbyLkdPurG0i7dN1wAAAA")
+            // zlatinb
+            new Destination("Wddh2E6FyyXBF7SvUYHKdN-vjf3~N6uqQWNeBDTM0P33YjiQCOsyedrjmDZmWFrXUJfJLWnCb5bnKezfk4uDaMyj~uvDG~yvLVcFgcPWSUd7BfGgym-zqcG1q1DcM8vfun-US7YamBlmtC6MZ2j-~Igqzmgshita8aLPCfNAA6S6e2UMjjtG7QIXlxpMec75dkHdJlVWbzrk9z8Qgru3YIk0UztYgEwDNBbm9wInsbHhr3HtAfa02QcgRVqRN2PnQXuqUJs7R7~09FZPEviiIcUpkY3FeyLlX1sgQFBeGeA96blaPvZNGd6KnNdgfLgMebx5SSxC-N4KZMSMBz5cgonQF3~m2HHFRSI85zqZNG5X9bJN85t80ltiv1W1es8ZnQW4es11r7MrvJNXz5bmSH641yJIvS6qI8OJJNpFVBIQSXLD-96TayrLQPaYw~uNZ-eXaE6G5dYhiuN8xHsFI1QkdaUaVZnvDGfsRbpS5GtpUbBDbyLkdPurG0i7dN1wAAAA"),
+            // sNL
+            new Destination("JC63wJNOqSJmymkj4~UJWywBTvDGikKMoYP0HX2Wz9c5l3otXSkwnxWAFL4cKr~Ygh3BNNi2t93vuLIiI1W8AsE42kR~PwRx~Y-WvIHXR6KUejRmOp-n8WidtjKg9k4aDy428uSOedqXDxys5mpoeQXwDsv1CoPTTwnmb1GWFy~oTGIsCguCl~aJWGnqiKarPO3GJQ~ev-NbvAQzUfC3HeP1e6pdI5CGGjExahTCID5UjpJw8GaDXWlGmYWWH303Xu4x-vAHQy1dJLsOBCn8dZravsn5BKJk~j0POUon45CCx-~NYtaPe0Itt9cMdD2ciC76Rep1D0X0sm1SjlSs8sZ52KmF3oaLZ6OzgI9QLMIyBUrfi41sK5I0qTuUVBAkvW1xr~L-20dYJ9TrbOaOb2-vDIfKaxVi6xQOuhgQDiSBhd3qv2m0xGu-BM9DQYfNA0FdMjnZmqjmji9RMavzQSsVFIbQGLbrLepiEFlb7TseCK5UtRp8TxnG7L4gbYevBQAEAAcAAA=="),
+            // dark_trion
+            new Destination("Gec9L29FVcQvYDgpcYuEYdltJn06PPoOWAcAM8Af-gDm~ehlrJcwlLXXs0hidq~yP2A0X7QcDi6i6shAfuEofTchxGJl8LRNqj9lio7WnB7cIixXWL~uCkD7Np5LMX0~akNX34oOb9RcBYVT2U5rFGJmJ7OtBv~IBkGeLhsMrqaCjahd0jdBO~QJ-t82ZKZhh044d24~JEfF9zSJxdBoCdAcXzryGNy7sYtFVDFsPKJudAxSW-UsSQiGw2~k-TxyF0r-iAt1IdzfNu8Lu0WPqLdhDYJWcPldx2PR5uJorI~zo~z3I5RX3NwzarlbD4nEP5s65ahPSfVCEkzmaJUBgP8DvBqlFaX89K4nGRYc7jkEjJ8cX4L6YPXUpTPWcfKkW259WdQY3YFh6x7rzijrGZewpczOLCrt-bZRYgDrUibmZxKZmNhy~lQu4gYVVjkz1i4tL~DWlhIc4y0x2vItwkYLArPPi~ejTnt-~Lhb7oPMXRcWa3UrwGKpFvGZY4NXBQAEAAcAAA==")
         ]
 
     static List<Destination> getCacheServers() {

core/src/main/groovy/com/muwire/core/hostcache/Host.groovy

@@ -5,22 +5,37 @@ import net.i2p.data.Destination
 class Host {
 
     private static final int MAX_FAILURES = 3
-    private static final int CLEAR_INTERVAL = 60 * 60 * 1000
 
     final Destination destination
+    private final int clearInterval, hopelessInterval, rejectionInterval
     int failures,successes
     long lastAttempt
+    long lastSuccessfulAttempt
+    long lastRejection
 
-	public Host(Destination destination) {
+    public Host(Destination destination, int clearInterval, int hopelessInterval, int rejectionInterval) {
         this.destination = destination
+        this.clearInterval = clearInterval
+        this.hopelessInterval = hopelessInterval
+        this.rejectionInterval = rejectionInterval
     }
     
-	synchronized void onConnect() {
+    private void connectSuccessful() {
         failures = 0
         successes++
         lastAttempt = System.currentTimeMillis()
     }
 
+    synchronized void onConnect() {
+        connectSuccessful()
+        lastSuccessfulAttempt = lastAttempt
+    }
+    
+    synchronized void onReject() {
+        connectSuccessful()
+        lastRejection = lastAttempt;
+    }
+
     synchronized void onFailure() {
         failures++
         successes = 0
@@ -39,7 +54,17 @@ class Host {
         failures = 0
     }
 
-    synchronized void canTryAgain() {
-        System.currentTimeMillis() - lastAttempt > CLEAR_INTERVAL
+    synchronized boolean canTryAgain() {
+        lastSuccessfulAttempt > 0 && 
+            System.currentTimeMillis() - lastAttempt > (clearInterval * 60 * 1000)
+    }
+    
+    synchronized boolean isHopeless() {
+        isFailed() && 
+            System.currentTimeMillis() - lastSuccessfulAttempt > (hopelessInterval * 60 * 1000)
+    }
+    
+    synchronized boolean isRecentlyRejected() {
+        System.currentTimeMillis() - lastRejection < (rejectionInterval * 60 * 1000)
     }
 }

core/src/main/groovy/com/muwire/core/hostcache/HostCache.groovy

@@ -52,7 +52,7 @@ class HostCache extends Service {
             hosts.get(e.destination).clearFailures()
             return
         }
-		Host host = new Host(e.destination)
+        Host host = new Host(e.destination, settings.hostClearInterval, settings.hostHopelessInterval, settings.hostRejectInterval)
         if (allowHost(host)) {
             hosts.put(e.destination, host)
         }
@@ -64,15 +64,17 @@ class HostCache extends Service {
         Destination dest = e.endpoint.destination
         Host host = hosts.get(dest)
         if (host == null) {
-			host = new Host(dest)
+            host = new Host(dest, settings.hostClearInterval, settings.hostHopelessInterval, settings.hostRejectInterval)
             hosts.put(dest, host)
         }
 
         switch(e.status) {
             case ConnectionAttemptStatus.SUCCESSFUL:
-			case ConnectionAttemptStatus.REJECTED:
                 host.onConnect()
                 break
+            case ConnectionAttemptStatus.REJECTED:
+                host.onReject()
+                break
             case ConnectionAttemptStatus.FAILED:
                 host.onFailure()
                 break
@@ -82,6 +84,10 @@ class HostCache extends Service {
     List<Destination> getHosts(int n) {
         List<Destination> rv = new ArrayList<>(hosts.keySet())
         rv.retainAll {allowHost(hosts[it])}
+        rv.removeAll {
+            def h = hosts[it]; 
+            (h.isFailed() && !h.canTryAgain()) || h.isRecentlyRejected()
+        }
         if (rv.size() <= n)
             return rv
         Collections.shuffle(rv)
@@ -106,11 +112,15 @@ class HostCache extends Service {
             storage.eachLine {
                 def entry = slurper.parseText(it)
                 Destination dest = new Destination(entry.destination)
-				Host host = new Host(dest)
+                Host host = new Host(dest, settings.hostClearInterval, settings.hostHopelessInterval, settings.hostRejectInterval)
                 host.failures = Integer.valueOf(String.valueOf(entry.failures))
                 host.successes = Integer.valueOf(String.valueOf(entry.successes))
                 if (entry.lastAttempt != null)
                     host.lastAttempt = entry.lastAttempt
+                if (entry.lastSuccessfulAttempt != null)
+                    host.lastSuccessfulAttempt = entry.lastSuccessfulAttempt
+                if (entry.lastRejection != null)
+                    host.lastRejection = entry.lastRejection
                 if (allowHost(host)) 
                     hosts.put(dest, host)
             }
@@ -120,8 +130,6 @@ class HostCache extends Service {
     }
 
     private boolean allowHost(Host host) {
-		if (host.isFailed() && !host.canTryAgain())
-			return false
         if (host.destination == myself)
             return false
         TrustLevel trust = trustService.getLevel(host.destination)
@@ -140,12 +148,14 @@ class HostCache extends Service {
         storage.delete()
         storage.withPrintWriter { writer ->
             hosts.each { dest, host ->
-				if (allowHost(host)) {
+                if (allowHost(host) && !host.isHopeless()) {
                     def map = [:]
                     map.destination = dest.toBase64()
                     map.failures = host.failures
                     map.successes = host.successes
                     map.lastAttempt = host.lastAttempt
+                    map.lastSuccessfulAttempt = host.lastSuccessfulAttempt
+                    map.lastRejection = host.lastRejection
                     def json = JsonOutput.toJson(map)
                     writer.println json
                 }

core/src/main/groovy/com/muwire/core/mesh/Mesh.groovy

@@ -0,0 +1,28 @@
+package com.muwire.core.mesh
+
+import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+import com.muwire.core.download.Pieces
+
+import net.i2p.data.Destination
+import net.i2p.util.ConcurrentHashSet
+
+class Mesh {
+    private final InfoHash infoHash
+    private final Set<Persona> sources = new ConcurrentHashSet<>()
+    private final Pieces pieces
+
+    Mesh(InfoHash infoHash, Pieces pieces) {
+        this.infoHash = infoHash
+        this.pieces = pieces
+    }
+
+    Set<Persona> getRandom(int n, Persona exclude) {
+        List<Persona> tmp = new ArrayList<>(sources)
+        tmp.remove(exclude)
+        Collections.shuffle(tmp)
+        if (tmp.size() < n)
+            return tmp
+        tmp[0..n-1]
+    }
+}

core/src/main/groovy/com/muwire/core/mesh/MeshManager.groovy

@@ -0,0 +1,103 @@
+package com.muwire.core.mesh
+
+import java.util.stream.Collectors
+
+import com.muwire.core.Constants
+import com.muwire.core.InfoHash
+import com.muwire.core.MuWireSettings
+import com.muwire.core.Persona
+import com.muwire.core.download.Pieces
+import com.muwire.core.download.SourceDiscoveredEvent
+import com.muwire.core.files.FileManager
+import com.muwire.core.util.DataUtil
+
+import groovy.json.JsonOutput
+import groovy.json.JsonSlurper
+import net.i2p.data.Base64
+
+class MeshManager {
+
+    private final Map<InfoHash, Mesh> meshes = Collections.synchronizedMap(new HashMap<>())
+    private final FileManager fileManager
+    private final File home
+    private final MuWireSettings settings
+
+    MeshManager(FileManager fileManager, File home, MuWireSettings settings) {
+        this.fileManager = fileManager
+        this.home = home
+        this.settings = settings
+        load()
+    }
+
+    Mesh get(InfoHash infoHash) {
+        meshes.get(infoHash)
+    }
+
+    Mesh getOrCreate(InfoHash infoHash, int nPieces, boolean sequential) {
+        synchronized(meshes) {
+            if (meshes.containsKey(infoHash))
+                return meshes.get(infoHash)
+            float ratio = sequential ? 0f : settings.downloadSequentialRatio
+            Pieces pieces = new Pieces(nPieces, ratio)
+            if (fileManager.rootToFiles.containsKey(infoHash)) {
+                for (int i = 0; i < nPieces; i++)
+                    pieces.markDownloaded(i)
+            }
+            Mesh rv = new Mesh(infoHash, pieces)
+            meshes.put(infoHash, rv)
+            return rv
+        }
+    }
+
+    void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+        Mesh mesh = meshes.get(e.infoHash)
+        if (mesh == null)
+            return
+       mesh.sources.add(e.source)
+       save()
+    }
+
+    private void save() {
+        File meshFile = new File(home, "mesh.json")
+        synchronized(meshes) {
+            meshFile.withPrintWriter { writer ->
+                meshes.values().each { mesh ->
+                    def json = [:]
+                    json.timestamp = System.currentTimeMillis()
+                    json.infoHash = Base64.encode(mesh.infoHash.getRoot())
+                    json.sources = mesh.sources.stream().map({it.toBase64()}).collect(Collectors.toList())
+                    json.nPieces = mesh.pieces.nPieces
+                    json.xHave = DataUtil.encodeXHave(mesh.pieces.downloaded, mesh.pieces.nPieces)
+                    writer.println(JsonOutput.toJson(json))
+                }
+            }
+        }
+    }
+
+    private void load() {
+        File meshFile = new File(home, "mesh.json")
+        if (!meshFile.exists())
+            return
+        long now = System.currentTimeMillis()
+        JsonSlurper slurper = new JsonSlurper()
+        meshFile.eachLine {
+            def json = slurper.parseText(it)
+            if (now - json.timestamp > settings.meshExpiration * 60 * 1000)
+                return
+            InfoHash infoHash = new InfoHash(Base64.decode(json.infoHash))
+            Pieces pieces = new Pieces(json.nPieces, settings.downloadSequentialRatio)
+
+            Mesh mesh = new Mesh(infoHash, pieces)
+            json.sources.each { source ->
+                Persona persona = new Persona(new ByteArrayInputStream(Base64.decode(source)))
+                mesh.sources.add(persona)
+            }
+
+            if (json.xHave != null)
+                DataUtil.decodeXHave(json.xHave).each { pieces.markDownloaded(it) }
+
+            if (!mesh.sources.isEmpty())
+                meshes.put(infoHash, mesh)
+        }
+    }
+}

core/src/main/groovy/com/muwire/core/search/ResultsParser.groovy

@@ -91,12 +91,17 @@ class ResultsParser {
             if (json.sources != null)
                 sources = json.sources.stream().map({new Destination(it)}).collect(Collectors.toSet())
                 
+            String comment = null
+            if (json.comment != null)
+                comment = DataUtil.readi18nString(Base64.decode(json.comment))
+
             return new UIResultEvent( sender : p,
                 name : name,
                 size : size,
                 infohash : new InfoHash(infoHash),
                 pieceSize : pieceSize,
                 sources : sources,
+                comment : comment,
                 uuid: uuid)
         } catch (Exception e) {
             throw new InvalidSearchResultException("parsing search result failed",e)

core/src/main/groovy/com/muwire/core/search/ResultsSender.groovy

@@ -4,6 +4,7 @@ import com.muwire.core.SharedFile
 import com.muwire.core.connection.Endpoint
 import com.muwire.core.connection.I2PConnector
 import com.muwire.core.files.FileHasher
+import com.muwire.core.util.DataUtil
 import com.muwire.core.Persona
 
 import java.nio.charset.StandardCharsets
@@ -11,6 +12,7 @@ import java.util.concurrent.Executor
 import java.util.concurrent.Executors
 import java.util.concurrent.ThreadFactory
 import java.util.concurrent.atomic.AtomicInteger
+import java.util.logging.Level
 import java.util.stream.Collectors
 
 import com.muwire.core.DownloadedFile
@@ -59,13 +61,18 @@ class ResultsSender {
                 Set<Destination> suggested = Collections.emptySet()
                 if (it instanceof DownloadedFile)
                     suggested = it.sources
+                def comment = null
+                if (it.getComment() != null) {
+                    comment = DataUtil.readi18nString(Base64.decode(it.getComment()))
+                }
                 def uiResultEvent = new UIResultEvent( sender : me,
                     name : it.getFile().getName(),
                     size : length,
                     infohash : it.getInfoHash(),
                     pieceSize : pieceSize,
                     uuid : uuid,
-                    sources : suggested
+                    sources : suggested,
+                    comment : comment
                     )
                     eventBus.publish(uiResultEvent)
             }
@@ -83,6 +90,7 @@ class ResultsSender {
 
         @Override
         public void run() {
+            try {
                 byte [] tmp = new byte[InfoHash.SIZE]
                 JsonOutput jsonOutput = new JsonOutput()
                 Endpoint endpoint = null;
@@ -120,6 +128,9 @@ class ResultsSender {
                         if (it instanceof DownloadedFile)
                             obj.sources = it.sources.stream().map({dest -> dest.toBase64()}).collect(Collectors.toSet())
                             
+                        if (it.getComment() != null)
+                            obj.comment = it.getComment()
+
                         def json = jsonOutput.toJson(obj)
                         os.writeShort((short)json.length())
                         os.write(json.getBytes(StandardCharsets.US_ASCII))
@@ -128,6 +139,9 @@ class ResultsSender {
                 } finally {
                     endpoint?.close()
                 }
+            } catch (Exception e) {
+                log.log(Level.WARNING, "problem sending results",e)
+            }
         }
     }
 }

core/src/main/groovy/com/muwire/core/search/SearchIndex.groovy

@@ -1,6 +1,6 @@
 package com.muwire.core.search
 
-import com.muwire.core.Constants
+import com.muwire.core.SplitPattern
 
 class SearchIndex {
 
@@ -32,8 +32,11 @@ class SearchIndex {
     }
 
     private static String[] split(String source) {
-		source = source.replaceAll(Constants.SPLIT_PATTERN, " ").toLowerCase()
-		source.split(" ")
+        source = source.replaceAll(SplitPattern.SPLIT_PATTERN, " ").toLowerCase()
+        String [] split = source.split(" ")
+        def rv = []
+        split.each { if (it.length() > 0) rv << it }
+        rv.toArray(new String[0])
     }
 
     String[] search(List<String> terms) {

core/src/main/groovy/com/muwire/core/search/UIResultEvent.groovy

@@ -14,6 +14,7 @@ class UIResultEvent extends Event {
     long size
     InfoHash infohash
     int pieceSize
+    String comment
 
     @Override
     public String toString() {

core/src/main/groovy/com/muwire/core/trust/RemoteTrustList.groovy

@@ -0,0 +1,31 @@
+package com.muwire.core.trust
+
+import java.util.concurrent.ConcurrentHashMap
+
+import com.muwire.core.Persona
+
+import net.i2p.util.ConcurrentHashSet
+
+class RemoteTrustList {
+    public enum Status { NEW, UPDATING, UPDATED, UPDATE_FAILED }
+
+    private final Persona persona
+    private final Set<Persona> good, bad
+    volatile long timestamp
+    volatile boolean forceUpdate
+    Status status = Status.NEW
+
+    RemoteTrustList(Persona persona) {
+        this.persona = persona
+        good = new ConcurrentHashSet<>()
+        bad = new ConcurrentHashSet<>()
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (!(o instanceof RemoteTrustList))
+            return false
+        RemoteTrustList other = (RemoteTrustList)o
+        persona == other.persona
+    }
+}

core/src/main/groovy/com/muwire/core/trust/TrustSubscriber.groovy

@@ -0,0 +1,161 @@
+package com.muwire.core.trust
+
+import java.nio.charset.StandardCharsets
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+import java.util.logging.Level
+
+import com.muwire.core.EventBus
+import com.muwire.core.MuWireSettings
+import com.muwire.core.Persona
+import com.muwire.core.UILoadedEvent
+import com.muwire.core.connection.Endpoint
+import com.muwire.core.connection.I2PConnector
+import com.muwire.core.util.DataUtil
+
+import groovy.util.logging.Log
+import net.i2p.data.Destination
+
+@Log
+class TrustSubscriber {
+    private final EventBus eventBus
+    private final I2PConnector i2pConnector
+    private final MuWireSettings settings
+
+    private final Map<Destination, RemoteTrustList> remoteTrustLists = new ConcurrentHashMap<>()
+
+    private final Object waitLock = new Object()
+    private volatile boolean shutdown
+    private volatile Thread thread
+    private final ExecutorService updateThreads = Executors.newCachedThreadPool()
+
+    TrustSubscriber(EventBus eventBus, I2PConnector i2pConnector, MuWireSettings settings) {
+        this.eventBus = eventBus
+        this.i2pConnector = i2pConnector
+        this.settings = settings
+    }
+
+    void onUILoadedEvent(UILoadedEvent e) {
+        thread = new Thread({checkLoop()} as Runnable, "trust-subscriber")
+        thread.setDaemon(true)
+        thread.start()
+    }
+
+    void stop() {
+        shutdown = true
+        thread?.interrupt()
+        updateThreads.shutdownNow()
+    }
+
+    void onTrustSubscriptionEvent(TrustSubscriptionEvent e) {
+        if (!e.subscribe) {
+            remoteTrustLists.remove(e.persona.destination)
+        } else {
+            RemoteTrustList trustList = remoteTrustLists.putIfAbsent(e.persona.destination, new RemoteTrustList(e.persona))
+            trustList?.forceUpdate = true
+            synchronized(waitLock) {
+                waitLock.notify()
+            }
+        }
+    }
+
+    private void checkLoop() {
+        try {
+            while(!shutdown) {
+                synchronized(waitLock) {
+                    waitLock.wait(60 * 1000)
+                }
+                final long now = System.currentTimeMillis()
+                remoteTrustLists.values().each { trustList ->
+                    if (trustList.status == RemoteTrustList.Status.UPDATING)
+                        return
+                    if (!trustList.forceUpdate &&
+                        now - trustList.timestamp < settings.trustListInterval * 60 * 60 * 1000)
+                        return
+                    trustList.forceUpdate = false
+                    updateThreads.submit(new UpdateJob(trustList))
+                }
+            }
+        } catch (InterruptedException e) {
+            if (!shutdown)
+                throw e
+        }
+    }
+
+    private class UpdateJob implements Runnable {
+
+        private final RemoteTrustList trustList
+
+        UpdateJob(RemoteTrustList trustList) {
+            this.trustList = trustList
+        }
+
+        public void run() {
+            trustList.status = RemoteTrustList.Status.UPDATING
+            eventBus.publish(new TrustSubscriptionUpdatedEvent(trustList : trustList))
+            if (check(trustList, System.currentTimeMillis()))
+                trustList.status = RemoteTrustList.Status.UPDATED
+            else
+                trustList.status = RemoteTrustList.Status.UPDATE_FAILED
+            eventBus.publish(new TrustSubscriptionUpdatedEvent(trustList : trustList))
+        }
+    }
+
+    private boolean check(RemoteTrustList trustList, long now) {
+        log.info("fetching trust list from ${trustList.persona.getHumanReadableName()}")
+        Endpoint endpoint = null
+        try {
+            endpoint = i2pConnector.connect(trustList.persona.destination)
+            OutputStream os = endpoint.getOutputStream()
+            InputStream is = endpoint.getInputStream()
+            os.write("TRUST\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+            os.flush()
+
+            String codeString = DataUtil.readTillRN(is)
+            int space = codeString.indexOf(' ')
+            if (space > 0)
+                codeString = codeString.substring(0,space)
+            int code = Integer.parseInt(codeString.trim())
+
+            if (code != 200) {
+                log.info("couldn't fetch trust list, code $code")
+                return false
+            }
+
+            // swallow any headers
+            String header
+            while (( header = DataUtil.readTillRN(is)) != "");
+
+            DataInputStream dis = new DataInputStream(is)
+
+            Set<Persona> good = new HashSet<>()
+            int nGood = dis.readUnsignedShort()
+            for (int i = 0; i < nGood; i++) {
+                Persona p = new Persona(dis)
+                good.add(p)
+            }
+
+            Set<Persona> bad = new HashSet<>()
+            int nBad = dis.readUnsignedShort()
+            for (int i = 0; i < nBad; i++) {
+                Persona p = new Persona(dis)
+                bad.add(p)
+            }
+
+            trustList.timestamp = now
+            trustList.good.clear()
+            trustList.good.addAll(good)
+            trustList.bad.clear()
+            trustList.bad.addAll(bad)
+
+            return true
+        } catch (Exception e) {
+            log.log(Level.WARNING,"exception fetching trust list from ${trustList.persona.getHumanReadableName()}",e)
+            return false
+        } finally {
+            endpoint?.close()
+        }
+
+    }
+}

core/src/main/groovy/com/muwire/core/trust/TrustSubscriptionEvent.groovy

@@ -0,0 +1,9 @@
+package com.muwire.core.trust
+
+import com.muwire.core.Event
+import com.muwire.core.Persona
+
+class TrustSubscriptionEvent extends Event {
+    Persona persona
+    boolean subscribe
+}

core/src/main/groovy/com/muwire/core/trust/TrustSubscriptionUpdatedEvent.groovy

@@ -0,0 +1,7 @@
+package com.muwire.core.trust
+
+import com.muwire.core.Event
+
+class TrustSubscriptionUpdatedEvent extends Event {
+    RemoteTrustList trustList
+}

core/src/main/groovy/com/muwire/core/update/UpdateClient.groovy

@@ -3,7 +3,15 @@ package com.muwire.core.update
 import java.util.logging.Level
 
 import com.muwire.core.EventBus
+import com.muwire.core.InfoHash
 import com.muwire.core.MuWireSettings
+import com.muwire.core.Persona
+import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.files.FileDownloadedEvent
+import com.muwire.core.files.FileManager
+import com.muwire.core.search.QueryEvent
+import com.muwire.core.search.SearchEvent
+import com.muwire.core.search.UIResultBatchEvent
 
 import groovy.json.JsonOutput
 import groovy.json.JsonSlurper
@@ -13,6 +21,7 @@ import net.i2p.client.I2PSessionMuxedListener
 import net.i2p.client.SendMessageOptions
 import net.i2p.client.datagram.I2PDatagramDissector
 import net.i2p.client.datagram.I2PDatagramMaker
+import net.i2p.data.Base64
 import net.i2p.util.VersionComparator
 
 @Log
@@ -21,16 +30,24 @@ class UpdateClient {
     final I2PSession session
     final String myVersion
     final MuWireSettings settings
+    final FileManager fileManager
+    final Persona me
 
     private final Timer timer
 
     private long lastUpdateCheckTime
 
-    UpdateClient(EventBus eventBus, I2PSession session, String myVersion, MuWireSettings settings) {
+    private volatile InfoHash updateInfoHash
+    private volatile String version, signer
+    private volatile boolean updateDownloading
+
+    UpdateClient(EventBus eventBus, I2PSession session, String myVersion, MuWireSettings settings, FileManager fileManager, Persona me) {
         this.eventBus = eventBus
         this.session = session
         this.myVersion = myVersion
         this.settings = settings
+        this.fileManager = fileManager
+        this.me = me
         timer = new Timer("update-client",true)
     }
 
@@ -43,6 +60,24 @@ class UpdateClient {
         timer.cancel()
     }
 
+    void onUIResultBatchEvent(UIResultBatchEvent results) {
+        if (results.results[0].infohash != updateInfoHash)
+            return
+        if (updateDownloading)
+            return
+        updateDownloading = true
+        def file = new File(settings.downloadLocation, results.results[0].name)
+        def downloadEvent = new UIDownloadEvent(result: results.results[0], sources : results.results[0].sources, target : file)
+        eventBus.publish(downloadEvent)
+    }
+
+    void onFileDownloadedEvent(FileDownloadedEvent e) {
+        if (e.downloadedFile.infoHash != updateInfoHash)
+            return
+        updateDownloading = false
+        eventBus.publish(new UpdateDownloadedEvent(version : version, signer : signer))
+    }
+
     private void checkUpdate() {
         final long now = System.currentTimeMillis()
         if (lastUpdateCheckTime > 0) {
@@ -106,8 +141,32 @@ class UpdateClient {
                     return
                 }
 
+                String infoHash
+                if (settings.updateType == "jar") {
+                    infoHash = payload.infoHash
+                } else
+                    infoHash = payload[settings.updateType]
+
+
+                if (!settings.autoDownloadUpdate) {
                     log.info("new version $payload.version available, publishing event")
-                eventBus.publish(new UpdateAvailableEvent(version : payload.version, signer : payload.signer, infoHash : payload.infoHash))
+                    eventBus.publish(new UpdateAvailableEvent(version : payload.version, signer : payload.signer, infoHash : infoHash))
+                } else {
+                    log.info("new version $payload.version available")
+                    updateInfoHash = new InfoHash(Base64.decode(infoHash))
+                    if (fileManager.rootToFiles.containsKey(updateInfoHash))
+                        eventBus.publish(new UpdateDownloadedEvent(version : payload.version, signer : payload.signer))
+                    else {
+                        updateDownloading = false
+                        version = payload.version
+                        signer = payload.signer
+                        log.info("starting search for new version hash $payload.infoHash")
+                        def searchEvent = new SearchEvent(searchHash : updateInfoHash.getRoot(), uuid : UUID.randomUUID(), oobInfohash : true)
+                        def queryEvent = new QueryEvent(searchEvent : searchEvent, firstHop : true, replyTo : me.destination,
+                            receivedOn : me.destination, originator : me)
+                        eventBus.publish(queryEvent)
+                    }
+                }
 
             } catch (Exception e) {
                 log.log(Level.WARNING,"Invalid datagram",e)

core/src/main/groovy/com/muwire/core/update/UpdateDownloadedEvent.groovy

@@ -0,0 +1,8 @@
+package com.muwire.core.update
+
+import com.muwire.core.Event
+
+class UpdateDownloadedEvent extends Event {
+    String version
+    String signer
+}

core/src/main/groovy/com/muwire/core/update/UpdateServers.groovy

@@ -3,5 +3,5 @@ package com.muwire.core.update
 import net.i2p.data.Destination
 
 class UpdateServers {
-    static final Destination UPDATE_SERVER = new Destination("pSWieSRB3czCl3Zz4WpKp4Z8tjv-05zbogRDS7SEnKcSdWOupVwjzQ92GsgQh1VqgoSRk1F8dpZOnHxxz5HFy9D7ri0uFdkMyXdSKoB7IgkkvCfTAyEmeaPwSYnurF3Zk7u286E7YG2rZkQZgJ77tow7ZS0mxFB7Z0Ti-VkZ9~GeGePW~howwNm4iSQACZA0DyTpI8iv5j4I0itPCQRgaGziob~Vfvjk49nd8N4jtaDGo9cEcafikVzQ2OgBgYWL6LRbrrItwuGqsDvITUHWaElUYIDhRQYUq8gYiUA6rwAJputfhFU0J7lIxFR9vVY7YzRvcFckfr0DNI4VQVVlPnRPkUxQa--BlldMaCIppWugjgKLwqiSiHywKpSMlBWgY2z1ry4ueEBo1WEP-mEf88wRk4cFQBCKtctCQnIG2GsnATqTl-VGUAsuzeNWZiFSwXiTy~gQ094yWx-K06fFZUDt4CMiLZVhGlixiInD~34FCRC9LVMtFcqiFB2M-Ql2AAAA")
+    static final Destination UPDATE_SERVER = new Destination("VJYAiCPZHNLraWvLkeRLxRiT4PHAqNqRO1nH240r7u1noBw8Pa~-lJOhKR7CccPkEN8ejSi4H6XjqKYLC8BKLVLeOgnAbedUVx81MV7DETPDdPEGV4RVu6YDFri7-tJOeqauGHxtlXT44YWuR69xKrTG3u4~iTWgxKnlBDht9Q3aVpSPFD2KqEizfVxolqXI0zmAZ2xMi8jfl0oe4GbgHrD9hR2FYj6yKfdqcUgHVobY4kDdJt-u31QqwWdsQMEj8Y3tR2XcNaITEVPiAjoKgBrYwB4jddWPNaT4XdHz76d9p9Iqes7dhOKq3OKpk6kg-bfIKiEOiA1mY49fn5h8pNShTqV7QBhh4CE4EDT3Szl~WsLdrlHUKJufSi7erEMh3coF7HORpF1wah2Xw7q470t~b8dKGKi7N7xQsqhGruDm66PH9oE9Kt9WBVBq2zORdPRtRM61I7EnrwDlbOkL0y~XpvQ3JKUQKdBQ3QsOJt8CHlhHHXMMbvqhntR61RSDBQAEAAcAAA==")
 }

core/src/main/groovy/com/muwire/core/upload/ContentRequest.groovy

@@ -2,4 +2,5 @@ package com.muwire.core.upload
 
 class ContentRequest extends Request {
     Range range
+    int have
 }

core/src/main/groovy/com/muwire/core/upload/ContentUploader.groovy

@@ -5,34 +5,58 @@ import java.nio.channels.FileChannel
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
 import java.nio.file.StandardOpenOption
+import java.util.stream.Collectors
 
+import com.muwire.core.Persona
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.util.DataUtil
+
+import net.i2p.data.Destination
 
 class ContentUploader extends Uploader {
 
     private final File file
     private final ContentRequest request
+    private final Mesh mesh
+    private final int pieceSize
 
-    ContentUploader(File file, ContentRequest request, Endpoint endpoint) {
+    ContentUploader(File file, ContentRequest request, Endpoint endpoint, Mesh mesh, int pieceSize) {
         super(endpoint)
         this.file = file
         this.request = request
+        this.mesh = mesh
+        this.pieceSize = pieceSize
     }
 
     @Override
     void respond() {
         OutputStream os = endpoint.getOutputStream()
         Range range = request.getRange()
-        if (range.start >= file.length() || range.end >= file.length()) {
-            os.write("416 Range Not Satisfiable\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+        boolean satisfiable = true
+        final long length = file.length()
+        if (range.start >= length || range.end >= length)
+            satisfiable = false
+        if (satisfiable) {
+            int startPiece = range.start / (0x1 << pieceSize)
+            int endPiece = range.end / (0x1 << pieceSize)
+            for (int i = startPiece; i <= endPiece; i++)
+                satisfiable &= mesh.pieces.isDownloaded(i)
+        }
+        if (!satisfiable) {
+            os.write("416 Range Not Satisfiable\r\n".getBytes(StandardCharsets.US_ASCII))
+            writeMesh(request.downloader)
+            os.write("\r\n".getBytes(StandardCharsets.US_ASCII))
             os.flush()
             return
         }
 
         os.write("200 OK\r\n".getBytes(StandardCharsets.US_ASCII))
-        os.write("Content-Range: $range.start-$range.end\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+        os.write("Content-Range: $range.start-$range.end\r\n".getBytes(StandardCharsets.US_ASCII))
+        writeMesh(request.downloader)
+        os.write("\r\n".getBytes(StandardCharsets.US_ASCII))
 
-        FileChannel channel
+        FileChannel channel = null
         try {
             channel = Files.newByteChannel(file.toPath(), EnumSet.of(StandardOpenOption.READ))
             mapped = channel.map(FileChannel.MapMode.READ_ONLY, range.start, range.end - range.start + 1)
@@ -48,6 +72,21 @@ class ContentUploader extends Uploader {
         } finally {
             try {channel?.close() } catch (IOException ignored) {}
             endpoint.getOutputStream().flush()
+            synchronized(this) {
+                DataUtil.tryUnmap(mapped)
+                mapped = null
+            }
+        }
+    }
+
+    private void writeMesh(Persona toExclude) {
+        String xHave = DataUtil.encodeXHave(mesh.pieces.getDownloaded(), mesh.pieces.nPieces)
+        endpoint.getOutputStream().write("X-Have: $xHave\r\n".getBytes(StandardCharsets.US_ASCII))
+
+        Set<Persona> sources = mesh.getRandom(9, toExclude)
+        if (!sources.isEmpty()) {
+            String xAlts = sources.stream().map({ it.toBase64() }).collect(Collectors.joining(","))
+            endpoint.getOutputStream().write("X-Alt: $xAlts\r\n".getBytes(StandardCharsets.US_ASCII))
         }
     }
 
@@ -70,4 +109,18 @@ class ContentUploader extends Uploader {
         request.downloader.getHumanReadableName()
     }
 
+    @Override
+    public int getDonePieces() {
+        return request.have;
+    }
+
+    @Override
+    public int getTotalPieces() {
+        return mesh.pieces.nPieces;
+    }
+
+    @Override
+    public long getTotalSize() {
+        return file.length();
+    }
 }

core/src/main/groovy/com/muwire/core/upload/HashListUploader.groovy

@@ -51,5 +51,18 @@ class HashListUploader extends Uploader {
         request.downloader.getHumanReadableName()
     }
 
+    @Override
+    public int getDonePieces() {
+        return 0;
+    }
 
+    @Override
+    public int getTotalPieces() {
+        return 1;
+    }
+
+    @Override
+    public long getTotalSize() {
+        return -1;
+    }
 }

core/src/main/groovy/com/muwire/core/upload/Request.groovy

@@ -5,6 +5,7 @@ import java.nio.charset.StandardCharsets
 import com.muwire.core.Constants
 import com.muwire.core.InfoHash
 import com.muwire.core.Persona
+import com.muwire.core.util.DataUtil
 
 import groovy.util.logging.Log
 import net.i2p.data.Base64
@@ -48,8 +49,14 @@ class Request {
             def decoded = Base64.decode(encoded)
             downloader = new Persona(new ByteArrayInputStream(decoded))
         }
+
+        int have = 0
+        if (headers.containsKey("X-Have")) {
+            def encoded = headers["X-Have"].trim()
+            have = DataUtil.decodeXHave(encoded).size()
+        }
         new ContentRequest( infoHash : infoHash, range : new Range(start, end),
-            headers : headers, downloader : downloader)
+            headers : headers, downloader : downloader, have : have)
     }
 
     static Request parseHashListRequest(InfoHash infoHash, InputStream is) throws IOException {

core/src/main/groovy/com/muwire/core/upload/UploadManager.groovy

@@ -6,7 +6,12 @@ import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
 import com.muwire.core.SharedFile
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.download.DownloadManager
+import com.muwire.core.download.Downloader
+import com.muwire.core.download.SourceDiscoveredEvent
 import com.muwire.core.files.FileManager
+import com.muwire.core.mesh.Mesh
+import com.muwire.core.mesh.MeshManager
 
 import groovy.util.logging.Log
 import net.i2p.data.Base64
@@ -15,12 +20,17 @@ import net.i2p.data.Base64
 public class UploadManager {
     private final EventBus eventBus
     private final FileManager fileManager
+    private final MeshManager meshManager
+    private final DownloadManager downloadManager
 
     public UploadManager() {}
 
-    public UploadManager(EventBus eventBus, FileManager fileManager) {
+    public UploadManager(EventBus eventBus, FileManager fileManager,
+        MeshManager meshManager, DownloadManager downloadManager) {
         this.eventBus = eventBus
         this.fileManager = fileManager
+        this.meshManager = meshManager
+        this.downloadManager = downloadManager
     }
 
     public void processGET(Endpoint e) throws IOException {
@@ -44,8 +54,10 @@ public class UploadManager {
             log.info("Responding to upload request for root $infoHashString")
 
             byte [] infoHashRoot = Base64.decode(infoHashString)
+            InfoHash infoHash = new InfoHash(infoHashRoot)
             Set<SharedFile> sharedFiles = fileManager.getSharedFiles(infoHashRoot)
-            if (sharedFiles == null || sharedFiles.isEmpty()) {
+            Downloader downloader = downloadManager.downloaders.get(infoHash)
+            if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
                 log.info "file not found"
                 e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
                 e.getOutputStream().flush()
@@ -61,13 +73,31 @@ public class UploadManager {
                 return
             }
 
-            Request request = Request.parseContentRequest(new InfoHash(infoHashRoot), e.getInputStream())
+            ContentRequest request = Request.parseContentRequest(infoHash, e.getInputStream())
             if (request.downloader != null && request.downloader.destination != e.destination) {
                 log.info("Downloader persona doesn't match their destination")
                 e.close()
                 return
             }
-            Uploader uploader = new ContentUploader(sharedFiles.iterator().next().file, request, e)
+
+            if (request.have > 0)
+                eventBus.publish(new SourceDiscoveredEvent(infoHash : request.infoHash, source : request.downloader))
+
+            Mesh mesh
+            File file
+            int pieceSize
+            if (downloader != null) {
+                mesh = meshManager.get(infoHash)
+                file = downloader.incompleteFile
+                pieceSize = downloader.pieceSizePow2
+            } else {
+                SharedFile sharedFile = sharedFiles.iterator().next();
+                mesh = meshManager.getOrCreate(request.infoHash, sharedFile.NPieces, false)
+                file = sharedFile.file
+                pieceSize = sharedFile.pieceSize
+            }
+
+            Uploader uploader = new ContentUploader(file, request, e, mesh, pieceSize)
             eventBus.publish(new UploadEvent(uploader : uploader))
             try {
                 uploader.respond()
@@ -85,8 +115,10 @@ public class UploadManager {
         log.info("Responding to hashlist request for root $infoHashString")
 
         byte [] infoHashRoot = Base64.decode(infoHashString)
+        InfoHash infoHash = new InfoHash(infoHashRoot)
+        Downloader downloader = downloadManager.downloaders.get(infoHash)
         Set<SharedFile> sharedFiles = fileManager.getSharedFiles(infoHashRoot)
-        if (sharedFiles == null || sharedFiles.isEmpty()) {
+        if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
             log.info "file not found"
             e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
             e.getOutputStream().flush()
@@ -102,13 +134,30 @@ public class UploadManager {
             return
         }
 
-        Request request = Request.parseHashListRequest(new InfoHash(infoHashRoot), e.getInputStream())
+        Request request = Request.parseHashListRequest(infoHash, e.getInputStream())
         if (request.downloader != null && request.downloader.destination != e.destination) {
             log.info("Downloader persona doesn't match their destination")
             e.close()
             return
         }
-        Uploader uploader = new HashListUploader(e, sharedFiles.iterator().next().infoHash, request)
+
+        InfoHash fullInfoHash
+        if (downloader == null) {
+            fullInfoHash = sharedFiles.iterator().next().infoHash
+        } else {
+            byte [] hashList = downloader.getInfoHash().getHashList()
+            if (hashList != null && hashList.length > 0)
+                fullInfoHash = downloader.getInfoHash()
+            else {
+                log.info("infohash not found in downloader")
+                e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
+                e.getOutputStream().flush()
+                e.close()
+                return
+            }
+        }
+
+        Uploader uploader = new HashListUploader(e, fullInfoHash, request)
         eventBus.publish(new UploadEvent(uploader : uploader))
         try {
             uploader.respond()
@@ -130,8 +179,10 @@ public class UploadManager {
             log.info("Responding to upload request for root $infoHashString")
 
             infoHashRoot = Base64.decode(infoHashString)
+            infoHash = new InfoHash(infoHashRoot)
             sharedFiles = fileManager.getSharedFiles(infoHashRoot)
-            if (sharedFiles == null || sharedFiles.isEmpty()) {
+            downloader = downloadManager.downloaders.get(infoHash)
+            if (downloader == null && (sharedFiles == null || sharedFiles.isEmpty())) {
                 log.info "file not found"
                 e.getOutputStream().write("404 File Not Found\r\n\r\n".getBytes(StandardCharsets.US_ASCII))
                 e.getOutputStream().flush()
@@ -153,7 +204,25 @@ public class UploadManager {
                 e.close()
                 return
             }
-            uploader = new ContentUploader(sharedFiles.iterator().next().file, request, e)
+
+            if (request.have > 0)
+                eventBus.publish(new SourceDiscoveredEvent(infoHash : request.infoHash, source : request.downloader))
+
+            Mesh mesh
+            File file
+            int pieceSize
+            if (downloader != null) {
+                mesh = meshManager.get(infoHash)
+                file = downloader.incompleteFile
+                pieceSize = downloader.pieceSizePow2
+            } else {
+                SharedFile sharedFile = sharedFiles.iterator().next();
+                mesh = meshManager.getOrCreate(request.infoHash, sharedFile.NPieces, false)
+                file = sharedFile.file
+                pieceSize = sharedFile.pieceSize
+            }
+
+            uploader = new ContentUploader(file, request, e, mesh, pieceSize)
             eventBus.publish(new UploadEvent(uploader : uploader))
             try {
                 uploader.respond()

core/src/main/groovy/com/muwire/core/upload/Uploader.groovy

@@ -32,4 +32,10 @@ abstract class Uploader {
     abstract int getProgress();
 
     abstract String getDownloader();
+
+    abstract int getDonePieces();
+
+    abstract int getTotalPieces();
+
+    abstract long getTotalSize();
 }

core/src/main/groovy/com/muwire/core/util/DataUtil.groovy

@@ -1,82 +0,0 @@
-package com.muwire.core.util
-
-import java.nio.charset.StandardCharsets
-
-import com.muwire.core.Constants
-
-class DataUtil {
-	
-	private final static int MAX_SHORT = (0x1 << 16) - 1
-
-	static void writeUnsignedShort(int value, OutputStream os) {
-		if (value > MAX_SHORT || value < 0)
-			throw new IllegalArgumentException("$value invalid")
-		
-		byte lsb = (byte) (value & 0xFF)
-		byte msb = (byte) (value >> 8)
-		
-		os.write(msb)
-		os.write(lsb)	
-	}
-	
-	private final static int MAX_HEADER = 0x7FFFFF
-	
-	static void packHeader(int length, byte [] header) {
-		if (header.length != 3)
-			throw new IllegalArgumentException("header length $header.length")
-		if (length < 0 || length > MAX_HEADER)
-			throw new IllegalArgumentException("length $length")
-		
-		header[2] = (byte) (length & 0xFF)
-		header[1] = (byte) ((length >> 8) & 0xFF)
-		header[0] = (byte) ((length >> 16) & 0x7F)
-	}
-	
-	static int readLength(byte [] header) {
-		if (header.length != 3)
-			throw new IllegalArgumentException("header length $header.length")
-			
-		return (((int)(header[0] & 0x7F)) << 16) |
-				(((int)(header[1] & 0xFF) << 8)) |
-				((int)header[2] & 0xFF)
-	}
-    
-    static String readi18nString(byte [] encoded) {
-        if (encoded.length < 2)
-            throw new IllegalArgumentException("encoding too short $encoded.length")
-        int length = ((encoded[0] & 0xFF) << 8) | (encoded[1] & 0xFF)
-        if (encoded.length != length + 2)
-            throw new IllegalArgumentException("encoding doesn't match length, expected $length found $encoded.length")
-        byte [] string = new byte[length]
-        System.arraycopy(encoded, 2, string, 0, length)
-        new String(string, StandardCharsets.UTF_8) 
-    }
-    
-    static byte[] encodei18nString(String string) {
-        byte [] utf8 = string.getBytes(StandardCharsets.UTF_8)
-        if (utf8.length > Short.MAX_VALUE)
-            throw new IllegalArgumentException("String in utf8 too long $utf8.length")
-        def baos = new ByteArrayOutputStream()
-        def daos = new DataOutputStream(baos)
-        daos.writeShort((short) utf8.length)
-        daos.write(utf8) 
-        daos.close()
-        baos.toByteArray()
-    }
-    
-    public static String readTillRN(InputStream is) {
-        def baos = new ByteArrayOutputStream()
-        while(baos.size() < (Constants.MAX_HEADER_SIZE)) {
-            byte read = is.read()
-            if (read == -1)
-                throw new IOException()
-            if (read == '\r') {
-                if (is.read() != '\n')
-                    throw new IOException("invalid header")
-                break
-            }
-            baos.write(read)
-        }
-        new String(baos.toByteArray(), StandardCharsets.US_ASCII)
-    }
-}

core/src/main/java/com/muwire/core/Constants.java

@@ -0,0 +1,11 @@
+package com.muwire.core;
+
+import net.i2p.crypto.SigType;
+
+public class Constants {
+    public static final byte PERSONA_VERSION = (byte)1;
+    public static final SigType SIG_TYPE = SigType.EdDSA_SHA512_Ed25519;
+
+    public static final int MAX_HEADER_SIZE = 0x1 << 14;
+    public static final int MAX_HEADERS = 16;
+}

core/src/main/java/com/muwire/core/DownloadedFile.java

@@ -1,6 +1,7 @@
 package com.muwire.core;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.Set;
 
 import net.i2p.data.Destination;
@@ -9,7 +10,8 @@ public class DownloadedFile extends SharedFile {
 
     private final Set<Destination> sources;
 
-	public DownloadedFile(File file, InfoHash infoHash, int pieceSize, Set<Destination> sources) {
+    public DownloadedFile(File file, InfoHash infoHash, int pieceSize, Set<Destination> sources)
+    throws IOException {
         super(file, infoHash, pieceSize);
         this.sources = sources;
     }

core/src/main/java/com/muwire/core/SharedFile.java

@@ -1,6 +1,13 @@
 package com.muwire.core;
 
 import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.muwire.core.util.DataUtil;
+
+import net.i2p.data.Base64;
 
 public class SharedFile {
 
@@ -8,10 +15,31 @@ public class SharedFile {
     private final InfoHash infoHash;
     private final int pieceSize;
 
-	public SharedFile(File file, InfoHash infoHash, int pieceSize) {
+    private final String cachedPath;
+    private final long cachedLength;
+    
+    private final String b64EncodedFileName;
+    private final String b64EncodedHashRoot;
+    private final List<String> b64EncodedHashList;
+    
+    private volatile String comment;
+
+    public SharedFile(File file, InfoHash infoHash, int pieceSize) throws IOException {
         this.file = file;
         this.infoHash = infoHash;
         this.pieceSize = pieceSize;
+        this.cachedPath = file.getAbsolutePath();
+        this.cachedLength = file.length();
+        this.b64EncodedFileName = Base64.encode(DataUtil.encodei18nString(file.toString()));
+        this.b64EncodedHashRoot = Base64.encode(infoHash.getRoot());
+        
+        List<String> b64List = new ArrayList<String>();
+        byte[] tmp = new byte[32];
+        for (int i = 0; i < infoHash.getHashList().length / 32; i++) {
+            System.arraycopy(infoHash.getHashList(), i * 32, tmp, 0, 32);
+            b64List.add(Base64.encode(tmp));
+        }
+        this.b64EncodedHashList = b64List;
     }
 
     public File getFile() {
@@ -26,6 +54,43 @@ public class SharedFile {
         return pieceSize;
     }
 
+    public int getNPieces() {
+        long length = file.length();
+        int rawPieceSize = 0x1 << pieceSize;
+        int rv = (int) (length / rawPieceSize);
+        if (length % rawPieceSize != 0)
+            rv++;
+        return rv;
+    }
+    
+    public String getB64EncodedFileName() {
+        return b64EncodedFileName;
+    }
+    
+    public String getB64EncodedHashRoot() {
+        return b64EncodedHashRoot;
+    }
+    
+    public List<String> getB64EncodedHashList() {
+        return b64EncodedHashList;
+    }
+
+    public String getCachedPath() {
+        return cachedPath;
+    }
+
+    public long getCachedLength() {
+        return cachedLength;
+    }
+    
+    public void setComment(String comment) {
+        this.comment = comment;
+    }
+    
+    public String getComment() {
+        return comment;
+    }
+
     @Override
     public int hashCode() {
         return file.hashCode() ^ infoHash.hashCode();

core/src/main/java/com/muwire/core/util/DataUtil.java

@@ -0,0 +1,168 @@
+package com.muwire.core.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.muwire.core.Constants;
+
+import net.i2p.data.Base64;
+
+public class DataUtil {
+
+    private final static int MAX_SHORT = (0x1 << 16) - 1;
+
+    static void writeUnsignedShort(int value, OutputStream os) throws IOException {
+        if (value > MAX_SHORT || value < 0)
+            throw new IllegalArgumentException("$value invalid");
+
+        byte lsb = (byte) (value & 0xFF);
+        byte msb = (byte) (value >> 8);
+
+        os.write(msb);
+        os.write(lsb);
+    }
+
+    private final static int MAX_HEADER = 0x7FFFFF;
+
+    static void packHeader(int length, byte [] header) {
+        if (header.length != 3)
+            throw new IllegalArgumentException("header length $header.length");
+        if (length < 0 || length > MAX_HEADER)
+            throw new IllegalArgumentException("length $length");
+
+        header[2] = (byte) (length & 0xFF);
+        header[1] = (byte) ((length >> 8) & 0xFF);
+        header[0] = (byte) ((length >> 16) & 0x7F);
+    }
+
+    static int readLength(byte [] header) {
+        if (header.length != 3)
+            throw new IllegalArgumentException("header length $header.length");
+
+        return (((int)(header[0] & 0x7F)) << 16) |
+                (((int)(header[1] & 0xFF) << 8)) |
+                ((int)header[2] & 0xFF);
+    }
+
+    static String readi18nString(byte [] encoded) {
+        if (encoded.length < 2)
+            throw new IllegalArgumentException("encoding too short $encoded.length");
+        int length = ((encoded[0] & 0xFF) << 8) | (encoded[1] & 0xFF);
+        if (encoded.length != length + 2)
+            throw new IllegalArgumentException("encoding doesn't match length, expected $length found $encoded.length");
+        byte [] string = new byte[length];
+        System.arraycopy(encoded, 2, string, 0, length);
+        return new String(string, StandardCharsets.UTF_8);
+    }
+
+    public static byte[] encodei18nString(String string) {
+        byte [] utf8 = string.getBytes(StandardCharsets.UTF_8);
+        if (utf8.length > Short.MAX_VALUE)
+            throw new IllegalArgumentException("String in utf8 too long $utf8.length");
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        DataOutputStream daos = new DataOutputStream(baos);
+        try {
+            daos.writeShort((short) utf8.length);
+            daos.write(utf8);
+            daos.close();
+        } catch (IOException impossible) {
+            throw new IllegalStateException(impossible);
+        }
+        return baos.toByteArray();
+    }
+
+    public static String readTillRN(InputStream is) throws IOException {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        while(baos.size() < (Constants.MAX_HEADER_SIZE)) {
+            int read = is.read();
+            if (read == -1)
+                throw new IOException();
+            if (read == '\r') {
+                if (is.read() != '\n')
+                    throw new IOException("invalid header");
+                break;
+            }
+            baos.write(read);
+        }
+        return new String(baos.toByteArray(), StandardCharsets.US_ASCII);
+    }
+
+    public static String encodeXHave(List<Integer> pieces, int totalPieces) {
+        int bytes = totalPieces / 8;
+        if (totalPieces % 8 != 0)
+            bytes++;
+        byte[] raw = new byte[bytes];
+        for (int it : pieces) {
+            int byteIdx = it / 8;
+            int offset = it % 8;
+            int mask = 0x80 >>> offset;
+            raw[byteIdx] |= mask;
+        }
+        return Base64.encode(raw);
+    }
+
+    public static List<Integer> decodeXHave(String xHave) {
+        byte [] availablePieces = Base64.decode(xHave);
+        List<Integer> available = new ArrayList<>();
+        for (int i = 0; i < availablePieces.length; i ++) {
+            byte b = availablePieces[i];
+            for (int j = 0; j < 8 ; j++) {
+                byte mask = (byte) (0x80 >>> j);
+                if ((b & mask) == mask) {
+                    available.add(i * 8 + j);
+                }
+            }
+        }
+        return available;
+    }
+
+    public static Throwable findRoot(Throwable e) {
+        while(e.getCause() != null)
+            e = e.getCause();
+        return e;
+    }
+
+    public static void tryUnmap(ByteBuffer cb) {
+        if (cb==null || !cb.isDirect()) return;
+        // we could use this type cast and call functions without reflection code,
+        // but static import from sun.* package is risky for non-SUN virtual machine.
+        //try { ((sun.nio.ch.DirectBuffer)cb).cleaner().clean(); } catch (Exception ex) { }
+
+        // JavaSpecVer: 1.6, 1.7, 1.8, 9, 10
+        boolean isOldJDK = System.getProperty("java.specification.version","99").startsWith("1.");
+        try {
+            if (isOldJDK) {
+                Method cleaner = cb.getClass().getMethod("cleaner");
+                cleaner.setAccessible(true);
+                Method clean = Class.forName("sun.misc.Cleaner").getMethod("clean");
+                clean.setAccessible(true);
+                clean.invoke(cleaner.invoke(cb));
+            } else {
+                Class unsafeClass;
+                try {
+                    unsafeClass = Class.forName("sun.misc.Unsafe");
+                } catch(Exception ex) {
+                    // jdk.internal.misc.Unsafe doesn't yet have an invokeCleaner() method,
+                    // but that method should be added if sun.misc.Unsafe is removed.
+                    unsafeClass = Class.forName("jdk.internal.misc.Unsafe");
+                }
+                Method clean = unsafeClass.getMethod("invokeCleaner", ByteBuffer.class);
+                clean.setAccessible(true);
+                Field theUnsafeField = unsafeClass.getDeclaredField("theUnsafe");
+                theUnsafeField.setAccessible(true);
+                Object theUnsafe = theUnsafeField.get(null);
+                clean.invoke(theUnsafe, cb);
+            }
+        } catch(Exception ex) { }
+        cb = null;
+    }
+}

core/src/test/groovy/com/muwire/core/download/DownloadSessionTest.groovy

@@ -1,21 +1,31 @@
 package com.muwire.core.download
 
+import static org.junit.Assert.fail
+
 import org.junit.After
+import org.junit.Before
+import org.junit.Ignore
 import org.junit.Test
 
+import com.muwire.core.EventBus
 import com.muwire.core.InfoHash
+import com.muwire.core.Persona
+import com.muwire.core.Personas
 import com.muwire.core.connection.Endpoint
 import com.muwire.core.files.FileHasher
 import static com.muwire.core.util.DataUtil.readTillRN
+import static com.muwire.core.util.DataUtil.encodeXHave
 
 import net.i2p.data.Base64
+import net.i2p.util.ConcurrentHashSet
 
 class DownloadSessionTest {
 
+    private EventBus eventBus
     private File source, target
     private InfoHash infoHash
     private Endpoint endpoint
-    private Pieces pieces, claimed
+    private Pieces pieces
     private String rootBase64
 
     private DownloadSession session
@@ -24,6 +34,16 @@ class DownloadSessionTest {
     private InputStream fromDownloader, fromUploader
     private OutputStream toDownloader, toUploader
 
+    private volatile boolean performed
+    private Set<Integer> available = new ConcurrentHashSet<>()
+    private volatile IOException thrown
+
+
+    @Before
+    public void setUp() {
+        eventBus = new EventBus()
+    }
+
     private void initSession(int size, def claimedPieces = []) {
         Random r = new Random()
         byte [] content = new byte[size]
@@ -48,8 +68,7 @@ class DownloadSessionTest {
         else
             nPieces = size / pieceSize + 1
         pieces = new Pieces(nPieces)
-        claimed = new Pieces(nPieces)
-        claimedPieces.each {claimed.markDownloaded(it)}
+        claimedPieces.each {pieces.claimed.set(it)}
 
         fromDownloader = new PipedInputStream()
         fromUploader = new PipedInputStream()
@@ -57,12 +76,20 @@ class DownloadSessionTest {
         toUploader = new PipedOutputStream(fromDownloader)
         endpoint = new Endpoint(null, fromUploader, toUploader, null)
 
-        session = new DownloadSession("",pieces, claimed, infoHash, endpoint, target, pieceSize, size)
-        downloadThread = new Thread( { session.request() } as Runnable)
+        session = new DownloadSession(eventBus, "",pieces, infoHash, endpoint, target, pieceSize, size, available)
+        downloadThread = new Thread( { perform() } as Runnable)
         downloadThread.setDaemon(true)
         downloadThread.start()
     }
 
+    private void perform() {
+        try {
+            performed = session.request()
+        } catch (IOException e) {
+            thrown = e
+        }
+    }
+
     @After
     public void teardown() {
         source?.delete()
@@ -77,6 +104,7 @@ class DownloadSessionTest {
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         assert "Range: 0-19" == readTillRN(fromDownloader)
         readTillRN(fromDownloader)
+        readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
 
         toDownloader.write("200 OK\r\n".bytes)
@@ -88,6 +116,9 @@ class DownloadSessionTest {
 
         assert pieces.isComplete()
         assert target.bytes == source.bytes
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
 
     @Test
@@ -99,6 +130,7 @@ class DownloadSessionTest {
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         readTillRN(fromDownloader)
         readTillRN(fromDownloader)
+        readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
 
         toDownloader.write("200 OK\r\n".bytes)
@@ -109,6 +141,9 @@ class DownloadSessionTest {
         Thread.sleep(150)
         assert pieces.isComplete()
         assert target.bytes == source.bytes
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
 
     @Test
@@ -126,6 +161,7 @@ class DownloadSessionTest {
         assert (start == 0 && end == ((1 << pieceSize) - 1)) ||
             (start == (1 << pieceSize) && end == (1 << pieceSize))
 
+        readTillRN(fromDownloader)
         readTillRN(fromDownloader)
         assert "" == readTillRN(fromDownloader)
 
@@ -139,14 +175,21 @@ class DownloadSessionTest {
         Thread.sleep(150)
         assert !pieces.isComplete()
         assert 1 == pieces.donePieces()
+        assert performed
+        assert available.isEmpty()
+        assert thrown == null
     }
 
     @Test
+    @Ignore // this needs to be rewritten with stealing in mind
     public void testSmallFileClaimed() {
         initSession(20, [0])
         long now = System.currentTimeMillis()
-        downloadThread.join(100)
-        assert 100 > (System.currentTimeMillis() - now)
+        downloadThread.join(150)
+        assert 100 >= (System.currentTimeMillis() - now)
+        assert !performed
+        assert available.isEmpty()
+        assert thrown == null
     }
 
     @Test
@@ -154,7 +197,7 @@ class DownloadSessionTest {
         int pieceSize = FileHasher.getPieceSize(1)
         int size = (1 << pieceSize) * 10
         initSession(size, [1,2,3,4,5,6,7,8,9])
-        assert !claimed.isMarked(0)
+        assert !pieces.claimed.get(0)
 
         assert "GET $rootBase64" == readTillRN(fromDownloader)
         String range = readTillRN(fromDownloader)
@@ -162,7 +205,131 @@ class DownloadSessionTest {
         int start = Integer.parseInt(matcher[0][1])
         int end = Integer.parseInt(matcher[0][2])
 
-        assert claimed.isMarked(0)
+        assert pieces.claimed.get(0)
         assert start == 0 && end == (1 << pieceSize) - 1
     }
+
+    @Test
+    public void test416NoHave() {
+        initSession(20)
+        readAllHeaders(fromDownloader)
+
+        toDownloader.write("416 don't have it\r\n\r\n".bytes)
+        toDownloader.flush()
+        Thread.sleep(150)
+        assert !performed
+        assert available.isEmpty()
+        assert thrown != null
+    }
+
+    @Test
+    public void test416Have() {
+        initSession(20)
+        readAllHeaders(fromDownloader)
+
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([0], 1)}\r\n\r\n".bytes)
+        toDownloader.flush()
+
+        Thread.sleep(150)
+        assert performed
+        assert available.contains(0)
+        assert thrown == null
+    }
+
+    @Test
+    public void test416Have2Pieces() {
+        int pieceSize = FileHasher.getPieceSize(1)
+        int size = (1 << pieceSize) + 1
+        initSession(size)
+        readAllHeaders(fromDownloader)
+
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([1], 2)}\r\n\r\n".bytes)
+        toDownloader.flush()
+
+        Thread.sleep(150)
+        assert performed
+        assert available.contains(1)
+        assert thrown == null
+    }
+
+    @Test
+    public void test200TwoPieces1Available() {
+        int pieceSize = FileHasher.getPieceSize(1)
+        int size = (1 << pieceSize) * 9 + 1
+        initSession(size)
+
+        Set<String> headers = readAllHeaders(fromDownloader)
+        def matcher = null
+        headers.each {
+            if (it.startsWith("Range"))
+                matcher = (it =~ /^Range: (\d+)-(\d+)$/)
+        }
+        assert matcher.groupCount() > 0
+        int start = Integer.parseInt(matcher[0][1])
+        int end = Integer.parseInt(matcher[0][2])
+
+        if (start == 0)
+            fail("inconlcusive")
+
+        toDownloader.write("416 don't have it \r\n".bytes)
+        toDownloader.write("X-Have: ${encodeXHave([0],2)}\r\n\r\n".bytes)
+        toDownloader.flush()
+        downloadThread.join()
+
+        assert performed
+        performed = false
+        assert available.contains(0)
+        assert thrown == null
+
+        // request same session
+        downloadThread = new Thread( { perform() } as Runnable)
+        downloadThread.setDaemon(true)
+        downloadThread.start()
+
+        Thread.sleep(150)
+
+        headers = readAllHeaders(fromDownloader)
+        matcher = null
+        headers.each {
+            if (it.startsWith("Range"))
+            matcher = (it =~ /^Range: (\d+)-(\d+)$/)
+        }
+        assert matcher.groupCount() > 0
+        start = Integer.parseInt(matcher[0][1])
+        end = Integer.parseInt(matcher[0][2])
+        assert start == 0
+    }
+
+    @Test
+    public void testXAlt() throws Exception {
+        Personas personas = new Personas()
+        def sources = []
+        def listener = new Object() {
+            public void onSourceDiscoveredEvent(SourceDiscoveredEvent e) {
+                sources << e.source
+            }
+        }
+        eventBus.register(SourceDiscoveredEvent.class, listener)
+
+        initSession(20)
+        readAllHeaders(fromDownloader)
+        toDownloader.write("416 don't have it\r\n".bytes)
+        toDownloader.write("X-Alt: ${personas.persona1.toBase64()},${personas.persona2.toBase64()}\r\n\r\n".bytes)
+        toDownloader.flush()
+
+        Thread.sleep(150)
+        assert sources.contains(personas.persona1)
+        assert sources.contains(personas.persona2)
+        assert 2 == sources.size()
+    }
+
+    private static Set<String> readAllHeaders(InputStream is) {
+        Set<String> rv = new HashSet<>()
+        String header
+        while((header = readTillRN(is)) != "")
+            rv.add(header)
+        rv
+    }
 }

core/src/test/groovy/com/muwire/core/download/PiecesTest.groovy

@@ -16,7 +16,7 @@ class PiecesTest {
     public void testSinglePiece() {
         pieces = new Pieces(1)
         assert !pieces.isComplete()
-        assert pieces.getRandomPiece() == 0
+        assert pieces.claim() == [0,0,0]
         pieces.markDownloaded(0)
         assert pieces.isComplete()
     }
@@ -25,13 +25,28 @@ class PiecesTest {
     public void testTwoPieces() {
         pieces = new Pieces(2)
         assert !pieces.isComplete()
-        int piece = pieces.getRandomPiece()
-        assert piece == 0 || piece == 1
-        pieces.markDownloaded(piece)
+        int[] piece = pieces.claim()
+        assert piece[0] == 0 || piece[0] == 1
+        pieces.markDownloaded(piece[0])
         assert !pieces.isComplete()
-        int piece2 = pieces.getRandomPiece()
-        assert piece != piece2
-        pieces.markDownloaded(piece2)
+        int[] piece2 = pieces.claim()
+        assert piece[0] != piece2[0]
+        pieces.markDownloaded(piece2[0])
         assert pieces.isComplete()
     }
+
+    @Test
+    public void testClaimAvailable() {
+        pieces = new Pieces(2)
+        int[] claimed = pieces.claim([0].toSet())
+        assert claimed == [0,0,0]
+        assert [0,0,1] == pieces.claim([0].toSet())
+    }
+
+    @Test
+    public void testClaimNoneAvailable() {
+        pieces = new Pieces(20)
+        int[] claimed = pieces.claim()
+        assert [0,0,0] == pieces.claim(claimed.toSet())
+    }
 }

core/src/test/groovy/com/muwire/core/files/FileHasherTest.groovy

@@ -26,7 +26,7 @@ class FileHasherTest extends GroovyTestCase {
     void testPieceSize() {
         assert 17 == FileHasher.getPieceSize(1000000)
         assert 17 == FileHasher.getPieceSize(100000000)
-		assert 27 == FileHasher.getPieceSize(FileHasher.MAX_SIZE)
+        assert 24 == FileHasher.getPieceSize(FileHasher.MAX_SIZE)
         shouldFail IllegalArgumentException, {
             FileHasher.getPieceSize(Long.MAX_VALUE)
         }

core/src/test/groovy/com/muwire/core/files/HasherServiceTest.groovy

@@ -27,6 +27,7 @@ class HasherServiceTest {
         hasher = new FileHasher()
         service = new HasherService(hasher, eventBus, new FileManager(eventBus, new MuWireSettings()))
         eventBus.register(FileHashedEvent.class, listener)
+        eventBus.register(FileSharedEvent.class, service)
         service.start()
     }
 

core/src/test/groovy/com/muwire/core/files/PersisterServiceLoadingTest.groovy

@@ -78,7 +78,7 @@ class PersisterServiceLoadingTest {
         persisted.write json
 
         PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(2000)
 
         assert listener.publishedFiles.size() == 1
@@ -121,7 +121,7 @@ class PersisterServiceLoadingTest {
         persisted.write json
 
         PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(2000)
 
         assert listener.publishedFiles.size() == 1
@@ -163,7 +163,7 @@ class PersisterServiceLoadingTest {
         persisted.append "$json2\n"
 
         PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(2000)
 
         assert listener.publishedFiles.size() == 2
@@ -195,7 +195,7 @@ class PersisterServiceLoadingTest {
         persisted.write json1
 
         PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(2000)
 
         assert listener.publishedFiles.size() == 1

core/src/test/groovy/com/muwire/core/files/PersisterServiceSavingTest.groovy

@@ -58,7 +58,7 @@ class PersisterServiceSavingTest {
         sf = new SharedFile(f, ih, 0)
 
         ps = new PersisterService(persisted, eventBus, 100, fileSource)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(1500)
 
         JsonSlurper jsonSlurper = new JsonSlurper()
@@ -77,7 +77,7 @@ class PersisterServiceSavingTest {
         sf = new DownloadedFile(f, ih, 0, new HashSet([dests.dest1, dests.dest2]))
 
         ps = new PersisterService(persisted, eventBus, 100, fileSource)
-		ps.start()
+        ps.onUILoadedEvent(null)
         Thread.sleep(1500)
 
         JsonSlurper jsonSlurper = new JsonSlurper()

core/src/test/groovy/com/muwire/core/hostcache/HostCacheTest.groovy

@@ -72,6 +72,9 @@ class HostCacheTest {
             TrustLevel.NEUTRAL
         }
         settingsMock.ignore.allowUntrusted { true }
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
 
         initMocks()
 
@@ -91,6 +94,10 @@ class HostCacheTest {
             TrustLevel.DISTRUSTED
         }
 
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
 
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
@@ -104,6 +111,9 @@ class HostCacheTest {
             TrustLevel.NEUTRAL
         }
         settingsMock.ignore.allowUntrusted { false }
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
 
         initMocks()
 
@@ -123,6 +133,9 @@ class HostCacheTest {
         }
         trustMock.demand.getLevel{ d -> TrustLevel.TRUSTED }
         trustMock.demand.getLevel{ d -> TrustLevel.TRUSTED }
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
 
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
@@ -139,6 +152,14 @@ class HostCacheTest {
             assert d == destinations.dest1
             TrustLevel.TRUSTED
         }
+        trustMock.demand.getLevel { d ->
+            assert d == destinations.dest1
+            TrustLevel.TRUSTED
+        }
+
+        settingsMock.ignore.getHostClearInterval { 100 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
         
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
@@ -158,6 +179,10 @@ class HostCacheTest {
             TrustLevel.TRUSTED
         }
 
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
 
@@ -183,6 +208,10 @@ class HostCacheTest {
             TrustLevel.TRUSTED
         }
 
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
 
@@ -214,6 +243,10 @@ class HostCacheTest {
             TrustLevel.TRUSTED
         }
 
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
@@ -229,6 +262,11 @@ class HostCacheTest {
             assert d == destinations.dest1
             TrustLevel.TRUSTED
         }
+        
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
         cache.onHostDiscoveredEvent(new HostDiscoveredEvent(destination: destinations.dest1))
         Thread.sleep(150)
@@ -260,6 +298,10 @@ class HostCacheTest {
             TrustLevel.TRUSTED
         }
 
+        settingsMock.ignore.getHostClearInterval { 0 }
+        settingsMock.ignore.getHostHopelessInterval { 0 }
+        settingsMock.ignore.getHostRejectInterval { 0 }
+        
         initMocks()
         def rv = cache.getHosts(5)
         assert rv.size() == 1

core/src/test/groovy/com/muwire/core/search/SearchIndexTest.groovy

@@ -83,4 +83,11 @@ class SearchIndexTest {
         assert found.size() == 1
         assert found.contains("b c.d")
     }
+
+    @Test
+    void testDuplicateTerm() {
+        initIndex(["MuWire-0.3.3.jar"])
+        def found = index.search(["muwire", "0", "3", "jar"])
+        assert found.size() == 1
+    }
 }

core/src/test/groovy/com/muwire/core/upload/RequestParsingTest.groovy

@@ -9,18 +9,18 @@ import com.muwire.core.InfoHash
 
 class RequestParsingTest {
 
-    Request request
+    ContentRequest request
 
     private void fromString(String requestString) {
         def is = new ByteArrayInputStream(requestString.getBytes(StandardCharsets.US_ASCII))
-        request = Request.parse(new InfoHash(new byte[InfoHash.SIZE]), is)
+        request = Request.parseContentRequest(new InfoHash(new byte[InfoHash.SIZE]), is)
     }
 
 
     private static void failed(String requestString) {
         try {
             def is = new ByteArrayInputStream(requestString.getBytes(StandardCharsets.US_ASCII))
-            Request.parse(new InfoHash(new byte[InfoHash.SIZE]), is)
+            Request.parseContentRequest(new InfoHash(new byte[InfoHash.SIZE]), is)
             assert false
         } catch (IOException expected) {}
     }

core/src/test/groovy/com/muwire/core/upload/UploaderTest.groovy

@@ -9,6 +9,9 @@ import org.junit.Test
 
 import com.muwire.core.InfoHash
 import com.muwire.core.connection.Endpoint
+import com.muwire.core.download.Pieces
+import com.muwire.core.files.FileHasher
+import com.muwire.core.mesh.Mesh
 
 class UploaderTest {
 
@@ -19,7 +22,7 @@ class UploaderTest {
     InputStream is
     OutputStream os
 
-    Request request
+    ContentRequest request
     Uploader uploader
 
     byte[] inFile
@@ -52,7 +55,13 @@ class UploaderTest {
     }
 
     private void startUpload() {
-        uploader = new Uploader(file, request, endpoint)
+        def hasher = new FileHasher()
+        InfoHash infoHash = hasher.hashFile(file)
+        Pieces pieces = new Pieces(FileHasher.getPieceSize(file.length()))
+        for (int i = 0; i < pieces.nPieces; i++)
+            pieces.markDownloaded(i)
+        Mesh mesh = new Mesh(infoHash, pieces)
+        uploader = new ContentUploader(file, request, endpoint, mesh, FileHasher.getPieceSize(file.length()))
         uploadThread = new Thread(uploader.respond() as Runnable)
         uploadThread.setDaemon(true)
         uploadThread.start()
@@ -77,10 +86,11 @@ class UploaderTest {
     @Test
     public void testSmallFile() {
         fillFile(20)
-        request = new Request(range : new Range(0,19))
+        request = new ContentRequest(range : new Range(0,19))
         startUpload()
         assert "200 OK" == readUntilRN()
         assert "Content-Range: 0-19" == readUntilRN()
+        assert readUntilRN().startsWith("X-Have")
         assert "" == readUntilRN()
 
         byte [] data = new byte[20]
@@ -92,10 +102,11 @@ class UploaderTest {
     @Test
     public void testRequestMiddle() {
         fillFile(20)
-        request = new Request(range : new Range(5,15))
+        request = new ContentRequest(range : new Range(5,15))
         startUpload()
         assert "200 OK" == readUntilRN()
         assert "Content-Range: 5-15" == readUntilRN()
+        assert readUntilRN().startsWith("X-Have")
         assert "" == readUntilRN()
 
         byte [] data = new byte[11]
@@ -108,9 +119,10 @@ class UploaderTest {
     @Test
     public void testOutOfRange() {
         fillFile(20)
-        request = new Request(range : new Range(0,20))
+        request = new ContentRequest(range : new Range(0,20))
         startUpload()
         assert "416 Range Not Satisfiable" == readUntilRN()
+        assert readUntilRN().startsWith("X-Have")
         assert "" == readUntilRN()
     }
 
@@ -118,11 +130,12 @@ class UploaderTest {
     public void testLargeFile() {
         final int length = 0x1 << 14
         fillFile(length)
-        request = new Request(range : new Range(0, length - 1))
+        request = new ContentRequest(range : new Range(0, length - 1))
         startUpload()
         readUntilRN()
         readUntilRN()
         readUntilRN()
+        readUntilRN()
 
         byte [] data = new byte[length]
         DataInputStream dis = new DataInputStream(is)

doc/design.md

@@ -49,7 +49,7 @@ Files are transferred over HTTP1.1 protocol with some custom headers added for d
 
 ### Mesh management
 
-Download mesh management is identical to Gnutella, except instead of ip addresses MuWire personas are used.  [More information](http://rfc-gnutella.sourceforge.net/developer/tmp/download-mesh.html) 
+Download mesh management is a simplified version of Gnutella's "Alternate Location" system.  For more information see the "download-mesh" document.
 
 ### In-Network updates
 

doc/download-mesh.md

@@ -0,0 +1,15 @@
+# Download Mesh / Partial Sharing
+
+MuWire uses a system similar to Gnutella's "Alternate Location" download mesh management system, however it is simplified to account for I2P's strengths and borrows a bit from BitTorrent's "Have" message.
+
+### "X-Have" header
+
+With every request a downloader makes it sends an "X-Have" header containing the Base64-encoded representation of a bitfield where bits set to 1 represent pieces of the file that the downloader already has.  To make partial file sharing possible, if the uploader does not have the complete file it also sends this header in every response.  If the header is missing it is assumed the uploader has the complete file.
+
+### "X-Alt" header
+
+The uploader can recommend other uploaders to the downloader via the "X-Alt" header.  The format of this header is a comma-separated list of Base64-encoded Personas that have previously reported having at least one piece of the file to the uploader via the "X-Have" header.
+
+### Differences from Gnutella
+
+Unlike Gnutella the uploader is the sole repository where possible sources of the file are tracked.  There is no negative "X-Nalt" header to prevent attacking the download mesh by mass downvoting of sources.

gradle.properties

@@ -1,8 +1,20 @@
 group         = com.muwire
-version       = 0.2.9
+version       = 0.5.0
 groovyVersion = 2.4.15
 slf4jVersion  = 1.7.25
 spockVersion  = 1.1-groovy-2.4
+grailsVersion=4.0.0
+gorm.version=7.0.2.RELEASE
 
 sourceCompatibility=1.8
 targetCompatibility=1.8
+
+# plugin properties
+author = zab@mail.i2p
+signer = zab@mail.i2p
+i2pVersion=0.9.41
+keystorePassword=changeit
+websiteURL=http://muwire.i2p
+updateURLsu3=http://muwire.i2p/MuWire.su3
+
+pack200=true

gradlew

@@ -11,21 +11,21 @@
 PRG="$0"
 # Need this for relative symlinks.
 while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
+    ls=$(ls -ld "$PRG")
+    link=$(expr "$ls" : '.*-> \(.*\)$')
     if expr "$link" : '/.*' > /dev/null; then
         PRG="$link"
     else
-        PRG=`dirname "$PRG"`"/$link"
+        PRG=$(dirname "$PRG")"/$link"
     fi
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
+SAVED="$(pwd)"
+cd "$(dirname "$PRG")/" >/dev/null
+APP_HOME="$(pwd -P)"
 cd "$SAVED" >/dev/null
 
 APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
+APP_BASE_NAME=$(basename "$0")
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS=""
@@ -49,7 +49,7 @@ cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
+case "$(uname)" in
   CYGWIN* )
     cygwin=true
     ;;
@@ -90,7 +90,7 @@ fi
 
 # Increase the maximum file descriptors if we can.
 if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
+    MAX_FD_LIMIT=$(ulimit -H -n)
     if [ $? -eq 0 ] ; then
         if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
             MAX_FD="$MAX_FD_LIMIT"
@@ -111,12 +111,12 @@ fi
 
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
+    APP_HOME=$(cygpath --path --mixed "$APP_HOME")
+    CLASSPATH=$(cygpath --path --mixed "$CLASSPATH")
+    JAVACMD=$(cygpath --unix "$JAVACMD")
 
     # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    ROOTDIRSRAW=$(find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null)
     SEP=""
     for dir in $ROOTDIRSRAW ; do
         ROOTDIRS="$ROOTDIRS$SEP$dir"
@@ -130,13 +130,13 @@ if $cygwin ; then
     # Now convert the arguments - kludge to limit ourselves to /bin/sh
     i=0
     for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+        CHECK=$(echo "$arg"|egrep -c "$OURCYGPATTERN" -)
+        CHECK2=$(echo "$arg"|egrep -c "^-")                                ### Determine if an option
 
         if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+            eval $(echo args$i)=$(cygpath --path --ignore --mixed "$arg")
         else
-            eval `echo args$i`="\"$arg\""
+            eval $(echo args$i)="\"$arg\""
         fi
         i=$((i+1))
     done

gui/build.gradle

@@ -44,9 +44,9 @@ mainClassName = 'com.muwire.gui.Launcher'
 applicationDefaultJvmArgs = ['-Djava.util.logging.config.file=logging.properties']
 
 apply from: 'gradle/publishing.gradle'
-apply from: 'gradle/code-coverage.gradle'
-apply from: 'gradle/code-quality.gradle'
-apply from: 'gradle/integration-test.gradle'
+// apply from: 'gradle/code-coverage.gradle'
+// apply from: 'gradle/code-quality.gradle'
+// apply from: 'gradle/integration-test.gradle'
 // apply from: 'gradle/package.gradle'
 apply from: 'gradle/docs.gradle'
 apply plugin: 'com.github.johnrengelman.shadow'
@@ -119,6 +119,7 @@ if (hasProperty('debugRun') && ((project.debugRun as boolean))) {
     }
 }
 
+/*
 task jacocoRootMerge(type: org.gradle.testing.jacoco.tasks.JacocoMerge, dependsOn: [test, jacocoTestReport, jacocoIntegrationTestReport]) {
     executionData = files(jacocoTestReport.executionData, jacocoIntegrationTestReport.executionData)
     destinationFile = file("${buildDir}/jacoco/root.exec")
@@ -138,4 +139,5 @@ task jacocoRootReport(dependsOn: jacocoRootMerge, type: JacocoReport) {
         xml.destination = file("${buildDir}/reports/jacoco/root/root.xml")
     }
 }
+*/
 

gui/griffon-app/conf/Config.groovy

@@ -26,4 +26,34 @@ mvcGroups {
         view = 'com.muwire.gui.OptionsView'
         controller = 'com.muwire.gui.OptionsController'
     }
+    "mu-wire-status" {
+        model = 'com.muwire.gui.MuWireStatusModel'
+        view = 'com.muwire.gui.MuWireStatusView'
+        controller = 'com.muwire.gui.MuWireStatusController'
+    }
+    'i-2-p-status' {
+        model = 'com.muwire.gui.I2PStatusModel'
+        view = 'com.muwire.gui.I2PStatusView'
+        controller = 'com.muwire.gui.I2PStatusController'
+    }
+    'trust-list' {
+        model = 'com.muwire.gui.TrustListModel'
+        view = 'com.muwire.gui.TrustListView'
+        controller = 'com.muwire.gui.TrustListController'
+    }
+    'content-panel' {
+        model = 'com.muwire.gui.ContentPanelModel'
+        view = 'com.muwire.gui.ContentPanelView'
+        controller = 'com.muwire.gui.ContentPanelController'
+    }
+    'show-comment' {
+        model = 'com.muwire.gui.ShowCommentModel'
+        view = 'com.muwire.gui.ShowCommentView'
+        controller = 'com.muwire.gui.ShowCommentController'
+    }
+    'add-comment' {
+        model = 'com.muwire.gui.AddCommentModel'
+        view = 'com.muwire.gui.AddCommentView'
+        controller = 'com.muwire.gui.AddCommentController'
+    }
 }

gui/griffon-app/controllers/com/muwire/gui/AddCommentController.groovy

@@ -0,0 +1,39 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import net.i2p.data.Base64
+
+import javax.annotation.Nonnull
+
+import com.muwire.core.util.DataUtil
+
+@ArtifactProviderFor(GriffonController)
+class AddCommentController {
+    @MVCMember @Nonnull
+    AddCommentModel model
+    @MVCMember @Nonnull
+    AddCommentView view
+
+    @ControllerAction
+    void save() {
+        String comment = view.textarea.getText()
+        if (comment.trim().length() == 0)
+            comment = null
+        else
+            comment = Base64.encode(DataUtil.encodei18nString(comment))
+        model.selectedFiles.each {
+            it.setComment(comment)
+        }
+        mvcGroup.parentGroup.view.refreshSharedFiles()
+        cancel()
+    }
+    
+    @ControllerAction
+    void cancel() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/ContentPanelController.groovy

@@ -0,0 +1,105 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+import com.muwire.core.EventBus
+import com.muwire.core.content.ContentControlEvent
+import com.muwire.core.content.Match
+import com.muwire.core.content.Matcher
+import com.muwire.core.content.RegexMatcher
+import com.muwire.core.trust.TrustEvent
+import com.muwire.core.trust.TrustLevel
+
+@ArtifactProviderFor(GriffonController)
+class ContentPanelController {
+    @MVCMember @Nonnull
+    ContentPanelModel model
+    @MVCMember @Nonnull
+    ContentPanelView view
+    
+    Core core
+
+    @ControllerAction
+    void addRule() {
+        def term = view.ruleTextField.text
+        
+        if (model.regex)
+            core.muOptions.watchedRegexes.add(term)
+        else
+            core.muOptions.watchedKeywords.add(term)
+        saveMuWireSettings()
+           
+        core.eventBus.publish(new ContentControlEvent(term : term, regex : model.regex, add:true))
+    }
+    
+    @ControllerAction
+    void deleteRule() {
+        int rule = view.getSelectedRule()
+        if (rule < 0)
+            return
+        Matcher matcher = model.rules[rule]
+        String term = matcher.getTerm()
+        if (matcher instanceof RegexMatcher) 
+            core.muOptions.watchedRegexes.remove(term)
+        else
+            core.muOptions.watchedKeywords.remove(term)
+        saveMuWireSettings()
+        
+        core.eventBus.publish(new ContentControlEvent(term : term, regex : (matcher instanceof RegexMatcher), add: false))
+    }
+    
+    @ControllerAction
+    void keyword() {
+        model.regex = false
+    }
+    
+    @ControllerAction
+    void regex() {
+        model.regex = true
+    }
+    
+    @ControllerAction
+    void refresh() {
+        model.refresh()
+    }
+    
+    @ControllerAction
+    void clearHits() {
+        int selectedRule = view.getSelectedRule()
+        if (selectedRule < 0)
+            return
+        Matcher matcher = model.rules[selectedRule]
+        matcher.matches.clear()
+        model.refresh()
+    }
+    
+    @ControllerAction
+    void trust() {
+        int selectedHit = view.getSelectedHit()
+        if (selectedHit < 0)
+            return
+        Match m = model.hits[selectedHit]
+        core.eventBus.publish(new TrustEvent(persona : m.persona, level : TrustLevel.TRUSTED))
+    }
+    
+    @ControllerAction
+    void distrust() {
+        int selectedHit = view.getSelectedHit()
+        if (selectedHit < 0)
+            return
+        Match m = model.hits[selectedHit]
+        core.eventBus.publish(new TrustEvent(persona : m.persona, level : TrustLevel.DISTRUSTED))
+    }
+    
+    void saveMuWireSettings() {
+        File f = new File(core.home, "MuWire.properties")
+        f.withOutputStream {
+            core.muOptions.write(it)
+        }
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/I2PStatusController.groovy

@@ -0,0 +1,41 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import net.i2p.router.Router
+
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+
+@ArtifactProviderFor(GriffonController)
+class I2PStatusController {
+    @MVCMember @Nonnull
+    I2PStatusModel model
+    @MVCMember @Nonnull
+    I2PStatusView view
+
+    @ControllerAction
+    void refresh() {
+        Core core = application.context.get("core")
+        Router router = core.router
+        model.networkStatus = router._context.commSystem().status.toStatusString()
+        model.floodfill = router._context.netDb().floodfillEnabled()
+        model.ntcpConnections = router._context.commSystem().getTransports()["NTCP"].countPeers()
+        model.ssuConnections = router._context.commSystem().getTransports()["SSU"].countPeers()
+        model.participatingTunnels = router._context.tunnelManager().getParticipatingCount()
+        model.activePeers = router._context.profileOrganizer().countActivePeers()
+        model.receiveBps = router._context.bandwidthLimiter().getReceiveBps15s()
+        model.sendBps = router._context.bandwidthLimiter().getSendBps15s()
+        model.participatingBW = router._context.bandwidthLimiter().getCurrentParticipatingBandwidth()
+
+    }
+
+    @ControllerAction
+    void close() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -11,16 +11,27 @@ import net.i2p.data.Base64
 
 import javax.annotation.Nonnull
 import javax.inject.Inject
+import javax.swing.JTable
 
-import com.muwire.core.Constants
 import com.muwire.core.Core
+import com.muwire.core.Persona
+import com.muwire.core.SharedFile
+import com.muwire.core.SplitPattern
+import com.muwire.core.download.Downloader
 import com.muwire.core.download.DownloadStartedEvent
 import com.muwire.core.download.UIDownloadCancelledEvent
 import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.download.UIDownloadPausedEvent
+import com.muwire.core.download.UIDownloadResumedEvent
+import com.muwire.core.files.DirectoryUnsharedEvent
+import com.muwire.core.files.FileUnsharedEvent
+import com.muwire.core.files.UIPersistFilesEvent
 import com.muwire.core.search.QueryEvent
 import com.muwire.core.search.SearchEvent
+import com.muwire.core.trust.RemoteTrustList
 import com.muwire.core.trust.TrustEvent
 import com.muwire.core.trust.TrustLevel
+import com.muwire.core.trust.TrustSubscriptionEvent
 
 @ArtifactProviderFor(GriffonController)
 class MainFrameController {
@@ -30,6 +41,8 @@ class MainFrameController {
 
     @MVCMember @Nonnull
     MainFrameModel model
+    @MVCMember @Nonnull
+    MainFrameView view
 
     private volatile Core core
 
@@ -42,10 +55,13 @@ class MainFrameController {
         search = search.trim()
         if (search.length() == 0)
             return
+        if (search.length() > 128)
+            search = search.substring(0,128)
         def uuid = UUID.randomUUID()
         Map<String, Object> params = new HashMap<>()
         params["search-terms"] = search
         params["uuid"] = uuid.toString()
+        params["core"] = core
         def group = mvcGroup.createMVCGroup("SearchTab", uuid.toString(), params)
         model.results[uuid.toString()] = group
 
@@ -65,11 +81,14 @@ class MainFrameController {
             searchEvent = new SearchEvent(searchHash : root, uuid : uuid, oobInfohash: true)
         } else {
             // this can be improved a lot
-            def replaced = search.toLowerCase().trim().replaceAll(Constants.SPLIT_PATTERN, " ")
+            def replaced = search.toLowerCase().trim().replaceAll(SplitPattern.SPLIT_PATTERN, " ")
             def terms = replaced.split(" ")
-            searchEvent = new SearchEvent(searchTerms : terms, uuid : uuid, oobInfohash: true)
+            def nonEmpty = []
+            terms.each { if (it.length() > 0) nonEmpty << it }
+            searchEvent = new SearchEvent(searchTerms : nonEmpty, uuid : uuid, oobInfohash: true)
         }
-        core.eventBus.publish(new QueryEvent(searchEvent : searchEvent, firstHop : true, 
+        boolean firstHop = core.muOptions.allowUntrusted || core.muOptions.searchExtraHop
+        core.eventBus.publish(new QueryEvent(searchEvent : searchEvent, firstHop : firstHop,
             replyTo: core.me.destination, receivedOn: core.me.destination,
             originator : core.me))
     }
@@ -81,6 +100,7 @@ class MainFrameController {
         Map<String, Object> params = new HashMap<>()
         params["search-terms"] = tabTitle
         params["uuid"] = uuid.toString()
+        params["core"] = core
         def group = mvcGroup.createMVCGroup("SearchTab", uuid.toString(), params)
         model.results[uuid.toString()] = group
 
@@ -91,20 +111,6 @@ class MainFrameController {
             originator : core.me))
     }
 
-    private def selectedResult() {
-        def selected = builder.getVariable("result-tabs").getSelectedComponent()
-        def group = selected.getClientProperty("mvc-group")
-        def table = selected.getClientProperty("results-table")
-        int row = table.getSelectedRow()
-        if (row == -1)
-            return
-        def sortEvt = group.view.lastSortEvent
-        if (sortEvt != null) {
-            row = group.view.resultsTable.rowSorter.convertRowIndexToModel(row)
-        } 
-        group.model.results[row]        
-    }
-    
     private int selectedDownload() {
         def downloadsTable = builder.getVariable("downloads-table")
         def selected = downloadsTable.getSelectedRow()
@@ -115,39 +121,21 @@ class MainFrameController {
     }
 
     @ControllerAction
-    void download() {
-        def result = selectedResult()
-        if (result == null)
+    void trustPersonaFromSearch() {
+        int selected = builder.getVariable("searches-table").getSelectedRow()
+        if (selected < 0)
             return
-        
-        if (!model.canDownload(result.infohash))
-            return   
-             
-        def file = new File(application.context.get("muwire-settings").downloadLocation, result.name)
-        
-        def selected = builder.getVariable("result-tabs").getSelectedComponent()
-        def group = selected.getClientProperty("mvc-group")
-        
-        def resultsBucket = group.model.hashBucket[result.infohash]
-        def sources = group.model.sourcesBucket[result.infohash]
-         
-        core.eventBus.publish(new UIDownloadEvent(result : resultsBucket, sources: sources, target : file))
+        Persona p = model.searches[selected].originator
+        core.eventBus.publish( new TrustEvent(persona : p, level : TrustLevel.TRUSTED) )
     }
 
     @ControllerAction
-    void trust() {
-        def result = selectedResult()
-        if (result == null)
-            return // TODO disable button
-        core.eventBus.publish( new TrustEvent(persona : result.sender, level : TrustLevel.TRUSTED))
-    }
-    
-    @ControllerAction
-    void distrust() {
-        def result = selectedResult()
-        if (result == null)
-            return // TODO disable button
-        core.eventBus.publish( new TrustEvent(persona : result.sender, level : TrustLevel.DISTRUSTED))
+    void distrustPersonaFromSearch() {
+        int selected = builder.getVariable("searches-table").getSelectedRow()
+        if (selected < 0)
+            return
+        Persona p = model.searches[selected].originator
+        core.eventBus.publish( new TrustEvent(persona : p, level : TrustLevel.DISTRUSTED) )
     }
 
     @ControllerAction
@@ -162,37 +150,145 @@ class MainFrameController {
     void resume() {
         def downloader = model.downloads[selectedDownload()].downloader
         downloader.resume()
+        core.eventBus.publish(new UIDownloadResumedEvent())
+    }
+
+    @ControllerAction
+    void pause() {
+        def downloader = model.downloads[selectedDownload()].downloader
+        downloader.pause()
+        core.eventBus.publish(new UIDownloadPausedEvent())
+    }
+
+    @ControllerAction
+    void clear() {
+        def toRemove = []
+        model.downloads.each {
+             if (it.downloader.getCurrentState() == Downloader.DownloadState.CANCELLED) {
+                 toRemove << it
+             } else if (it.downloader.getCurrentState() == Downloader.DownloadState.FINISHED) {
+                 toRemove << it
+             }
+         }
+         toRemove.each {
+             model.downloads.remove(it)
+         }
+         model.clearButtonEnabled = false
+
     }
 
     private void markTrust(String tableName, TrustLevel level, def list) {
-        int row = builder.getVariable(tableName).getSelectedRow()
+        int row = view.getSelectedTrustTablesRow(tableName)
         if (row < 0)
             return
+        builder.getVariable(tableName).model.fireTableDataChanged()
         core.eventBus.publish(new TrustEvent(persona : list[row], level : level))
     }
 
     @ControllerAction
     void markTrusted() {
         markTrust("distrusted-table", TrustLevel.TRUSTED, model.distrusted)
+        model.markTrustedButtonEnabled = false
+        model.markNeutralFromDistrustedButtonEnabled = false
     }
 
     @ControllerAction
     void markNeutralFromDistrusted() {
         markTrust("distrusted-table", TrustLevel.NEUTRAL, model.distrusted)
+        model.markTrustedButtonEnabled = false
+        model.markNeutralFromDistrustedButtonEnabled = false
     }
 
     @ControllerAction
     void markDistrusted() {
         markTrust("trusted-table", TrustLevel.DISTRUSTED, model.trusted)
+        model.subscribeButtonEnabled = false
+        model.markDistrustedButtonEnabled = false
+        model.markNeutralFromTrustedButtonEnabled = false
     }
 
     @ControllerAction
     void markNeutralFromTrusted() {
         markTrust("trusted-table", TrustLevel.NEUTRAL, model.trusted)
+        model.subscribeButtonEnabled = false
+        model.markDistrustedButtonEnabled = false
+        model.markNeutralFromTrustedButtonEnabled = false
     }
 
-    void unshareSelectedFiles() {
-        println "unsharing selected files"
+    @ControllerAction
+    void subscribe() {
+        int row = view.getSelectedTrustTablesRow("trusted-table")
+        if (row < 0)
+            return
+        Persona p = model.trusted[row]
+        core.muOptions.trustSubscriptions.add(p)
+        saveMuWireSettings()
+        core.eventBus.publish(new TrustSubscriptionEvent(persona : p, subscribe : true))
+        model.subscribeButtonEnabled = false
+        model.markDistrustedButtonEnabled = false
+        model.markNeutralFromTrustedButtonEnabled = false
+    }
+
+    @ControllerAction
+    void review() {
+        RemoteTrustList list = getSelectedTrustList()
+        if (list == null)
+            return
+        Map<String,Object> env = new HashMap<>()
+        env["trustList"] = list
+        env["trustService"] = core.trustService
+        env["eventBus"] = core.eventBus
+        mvcGroup.createMVCGroup("trust-list", env)
+
+    }
+
+    @ControllerAction
+    void update() {
+        RemoteTrustList list = getSelectedTrustList()
+        if (list == null)
+            return
+        core.eventBus.publish(new TrustSubscriptionEvent(persona : list.persona, subscribe : true))
+    }
+
+    @ControllerAction
+    void unsubscribe() {
+        RemoteTrustList list = getSelectedTrustList()
+        if (list == null)
+            return
+        core.muOptions.trustSubscriptions.remove(list.persona)
+        saveMuWireSettings()
+        model.subscriptions.remove(list)
+        JTable table = builder.getVariable("subscription-table")
+        table.model.fireTableDataChanged()
+        core.eventBus.publish(new TrustSubscriptionEvent(persona : list.persona, subscribe : false))
+    }
+
+    private RemoteTrustList getSelectedTrustList() {
+        int row = view.getSelectedTrustTablesRow("subscription-table")
+        if (row < 0)
+            return null
+        model.subscriptions[row]
+    }
+
+    void unshareSelectedFile() {
+        def sf = view.selectedSharedFiles()
+        if (sf == null)
+            return
+        sf.each {  
+            core.eventBus.publish(new FileUnsharedEvent(unsharedFile : it))
+        }
+        core.eventBus.publish(new UIPersistFilesEvent())
+    }
+    
+    @ControllerAction
+    void addComment() {
+        def selectedFiles = view.selectedSharedFiles()
+        if (selectedFiles == null || selectedFiles.isEmpty())
+            return
+        
+        Map<String, Object> params = new HashMap<>()
+        params['selectedFiles'] = selectedFiles
+        mvcGroup.createMVCGroup("add-comment", "Add Comment", params)
     }
 
     void saveMuWireSettings() {

gui/griffon-app/controllers/com/muwire/gui/MuWireStatusController.groovy

@@ -0,0 +1,45 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+
+@ArtifactProviderFor(GriffonController)
+class MuWireStatusController {
+    @MVCMember @Nonnull
+    MuWireStatusModel model
+    @MVCMember @Nonnull
+    MuWireStatusView view
+
+    @ControllerAction
+    void refresh() {
+        Core core = application.context.get("core")
+
+        int incoming = 0
+        int outgoing = 0
+        core.connectionManager.getConnections().each {
+            if (it.incoming)
+                incoming++
+            else
+                outgoing++
+        }
+        model.incomingConnections = incoming
+        model.outgoingConnections = outgoing
+
+        model.knownHosts = core.hostCache.hosts.size()
+
+        model.sharedFiles = core.fileManager.fileToSharedFile.size()
+
+        model.downloads = core.downloadManager.downloaders.size()
+    }
+
+    @ControllerAction
+    void close() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/OptionsController.groovy

@@ -4,9 +4,15 @@ import griffon.core.artifact.GriffonController
 import griffon.core.controller.ControllerAction
 import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
+import groovy.util.logging.Log
+
+import java.util.logging.Level
+
 import javax.annotation.Nonnull
+import javax.swing.JFileChooser
 
 import com.muwire.core.Core
+import com.muwire.core.MuWireSettings
 
 @ArtifactProviderFor(GriffonController)
 class OptionsController {
@@ -19,6 +25,7 @@ class OptionsController {
     void save() {
         String text
         Core core = application.context.get("core")
+        MuWireSettings settings = application.context.get("muwire-settings")
 
         def i2pProps = core.i2pOptions
 
@@ -38,6 +45,17 @@ class OptionsController {
         model.outboundLength = text
         i2pProps["outbound.length"] = text
 
+        if (settings.embeddedRouter) {
+            text = view.i2pNTCPPortField.text
+            model.i2pNTCPPort = text
+            i2pProps["i2np.ntcp.port"] = text
+
+            text = view.i2pUDPPortField.text
+            model.i2pUDPPort = text
+            i2pProps["i2np.udp.port"] = text
+        }
+
+
         File i2pSettingsFile = new File(core.home, "i2p.properties")
         i2pSettingsFile.withOutputStream {
             i2pProps.store(it,"")
@@ -46,21 +64,50 @@ class OptionsController {
         text = view.retryField.text
         model.downloadRetryInterval = text
 
-        def settings = application.context.get("muwire-settings")
         settings.downloadRetryInterval = Integer.valueOf(text)
 
         text = view.updateField.text
         model.updateCheckInterval = text
         settings.updateCheckInterval = Integer.valueOf(text)
 
-        boolean onlyTrusted = view.allowUntrustedCheckbox.model.isSelected()
-        model.onlyTrusted = onlyTrusted
-        settings.setAllowUntrusted(!onlyTrusted)
+        boolean autoDownloadUpdate = view.autoDownloadUpdateCheckbox.model.isSelected()
+        model.autoDownloadUpdate = autoDownloadUpdate
+        settings.autoDownloadUpdate = autoDownloadUpdate
+
 
         boolean shareDownloaded = view.shareDownloadedCheckbox.model.isSelected()
         model.shareDownloadedFiles = shareDownloaded
         settings.shareDownloadedFiles = shareDownloaded
 
+        String downloadLocation = model.downloadLocation
+        settings.downloadLocation = new File(downloadLocation)
+
+        if (settings.embeddedRouter) {
+            text = view.inBwField.text
+            model.inBw = text
+            settings.inBw = Integer.valueOf(text)
+            text = view.outBwField.text
+            model.outBw = text
+            settings.outBw = Integer.valueOf(text)
+        }
+
+
+        boolean onlyTrusted = view.allowUntrustedCheckbox.model.isSelected()
+        model.onlyTrusted = onlyTrusted
+        settings.setAllowUntrusted(!onlyTrusted)
+
+        boolean searchExtraHop = view.searchExtraHopCheckbox.model.isSelected()
+        model.searchExtraHop = searchExtraHop
+        settings.searchExtraHop = searchExtraHop
+        
+        boolean trustLists = view.allowTrustListsCheckbox.model.isSelected()
+        model.trustLists = trustLists
+        settings.allowTrustLists = trustLists
+
+        String trustListInterval = view.trustListIntervalField.text
+        model.trustListInterval = trustListInterval
+        settings.trustListInterval = Integer.parseInt(trustListInterval)
+
         File settingsFile = new File(core.home, "MuWire.properties")
         settingsFile.withOutputStream {
             settings.write(it)
@@ -77,9 +124,9 @@ class OptionsController {
         model.font = text
         uiSettings.font = text
 
-        boolean showMonitor = view.monitorCheckbox.model.isSelected()
-        model.showMonitor = showMonitor
-        uiSettings.showMonitor = showMonitor
+//        boolean showMonitor = view.monitorCheckbox.model.isSelected()
+//        model.showMonitor = showMonitor
+//        uiSettings.showMonitor = showMonitor
 
         boolean clearCancelledDownloads = view.clearCancelledDownloadsCheckbox.model.isSelected()
         model.clearCancelledDownloads = clearCancelledDownloads
@@ -93,9 +140,9 @@ class OptionsController {
         model.excludeLocalResult = excludeLocalResult
         uiSettings.excludeLocalResult = excludeLocalResult
 
-        boolean showSearchHashes = view.showSearchHashesCheckbox.model.isSelected()
-        model.showSearchHashes = showSearchHashes
-        uiSettings.showSearchHashes = showSearchHashes
+//        boolean showSearchHashes = view.showSearchHashesCheckbox.model.isSelected()
+//        model.showSearchHashes = showSearchHashes
+//        uiSettings.showSearchHashes = showSearchHashes
         
         File uiSettingsFile = new File(core.home, "gui.properties")
         uiSettingsFile.withOutputStream {
@@ -110,4 +157,15 @@ class OptionsController {
         view.d.setVisible(false)
         mvcGroup.destroy()
     }
+
+    @ControllerAction
+    void downloadLocation() {
+        def chooser = new JFileChooser()
+        chooser.setFileHidingEnabled(false)
+        chooser.setDialogTitle("Select location for downloaded files")
+        chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY)
+        int rv = chooser.showOpenDialog(null)
+        if (rv == JFileChooser.APPROVE_OPTION)
+            model.downloadLocation = chooser.getSelectedFile().getAbsolutePath()
+    }    
 }

gui/griffon-app/controllers/com/muwire/gui/SearchTabController.groovy

@@ -6,6 +6,83 @@ import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
 import javax.annotation.Nonnull
 
+import com.muwire.core.Core
+import com.muwire.core.download.UIDownloadEvent
+import com.muwire.core.search.UIResultEvent
+import com.muwire.core.trust.TrustEvent
+import com.muwire.core.trust.TrustLevel
+
 @ArtifactProviderFor(GriffonController)
 class SearchTabController {
-}
+
+    @MVCMember @Nonnull
+    SearchTabModel model
+    @MVCMember @Nonnull
+    SearchTabView view
+
+    Core core
+
+    private def selectedResults() {
+        int[] rows = view.resultsTable.getSelectedRows()
+        if (rows.length == 0)
+            return null
+        def sortEvt = view.lastSortEvent
+        if (sortEvt != null) {
+            for (int i = 0; i < rows.length; i++) {
+                rows[i] = view.resultsTable.rowSorter.convertRowIndexToModel(rows[i])
+            }
+        }
+        List<UIResultEvent> results = new ArrayList<>()
+        rows.each { results.add(model.results[it]) }
+            results
+        }
+
+        @ControllerAction
+        void download() {
+            def results = selectedResults()
+            if (results == null)
+                return
+
+            results.removeAll {
+                !mvcGroup.parentGroup.model.canDownload(it.infohash)
+            }
+
+            results.each { result ->
+                def file = new File(application.context.get("muwire-settings").downloadLocation, result.name)
+
+                def resultsBucket = model.hashBucket[result.infohash]
+                def sources = model.sourcesBucket[result.infohash]
+
+                core.eventBus.publish(new UIDownloadEvent(result : resultsBucket, sources: sources,
+                target : file, sequential : view.sequentialDownloadCheckbox.model.isSelected()))
+            }
+            mvcGroup.parentGroup.view.showDownloadsWindow.call()
+        }
+
+        @ControllerAction
+        void trust() {
+            int row = view.selectedSenderRow()
+            if (row < 0)
+                return
+            def sender = model.senders[row]
+            core.eventBus.publish( new TrustEvent(persona : sender, level : TrustLevel.TRUSTED))
+        }
+
+        @ControllerAction
+        void distrust() {
+            int row = view.selectedSenderRow()
+            if (row < 0)
+                return
+            def sender = model.senders[row]
+            core.eventBus.publish( new TrustEvent(persona : sender, level : TrustLevel.DISTRUSTED))
+        }
+
+        @ControllerAction
+        void neutral() {
+            int row = view.selectedSenderRow()
+            if (row < 0)
+                return
+            def sender = model.senders[row]
+            core.eventBus.publish( new TrustEvent(persona : sender, level : TrustLevel.NEUTRAL))
+        }
+    }

gui/griffon-app/controllers/com/muwire/gui/ShowCommentController.groovy

@@ -0,0 +1,19 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+@ArtifactProviderFor(GriffonController)
+class ShowCommentController {
+    @MVCMember @Nonnull
+    ShowCommentView view
+
+    @ControllerAction
+    void dismiss() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/TrustListController.groovy

@@ -0,0 +1,62 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+import com.muwire.core.EventBus
+import com.muwire.core.Persona
+import com.muwire.core.trust.TrustEvent
+import com.muwire.core.trust.TrustLevel
+
+@ArtifactProviderFor(GriffonController)
+class TrustListController {
+    @MVCMember @Nonnull
+    TrustListModel model
+    @MVCMember @Nonnull
+    TrustListView view
+
+    EventBus eventBus
+
+    @ControllerAction
+    void trustFromTrusted() {
+        int selectedRow = view.getSelectedRow("trusted-table")
+        if (selectedRow < 0)
+            return
+        Persona p = model.trusted[selectedRow]
+        eventBus.publish(new TrustEvent(persona : p, level : TrustLevel.TRUSTED))
+        view.fireUpdate("trusted-table")
+    }
+
+    @ControllerAction
+    void trustFromDistrusted() {
+        int selectedRow = view.getSelectedRow("distrusted-table")
+        if (selectedRow < 0)
+            return
+        Persona p = model.distrusted[selectedRow]
+        eventBus.publish(new TrustEvent(persona : p, level : TrustLevel.TRUSTED))
+        view.fireUpdate("distrusted-table")
+    }
+
+    @ControllerAction
+    void distrustFromTrusted() {
+        int selectedRow = view.getSelectedRow("trusted-table")
+        if (selectedRow < 0)
+            return
+        Persona p = model.trusted[selectedRow]
+        eventBus.publish(new TrustEvent(persona : p, level : TrustLevel.DISTRUSTED))
+        view.fireUpdate("trusted-table")
+    }
+
+    @ControllerAction
+    void distrustFromDistrusted() {
+        int selectedRow = view.getSelectedRow("distrusted-table")
+        if (selectedRow < 0)
+            return
+        Persona p = model.distrusted[selectedRow]
+        eventBus.publish(new TrustEvent(persona : p, level : TrustLevel.DISTRUSTED))
+        view.fireUpdate("distrusted-table")
+    }
+}

gui/griffon-app/lifecycle/Initialize.groovy

@@ -43,6 +43,8 @@ class Initialize extends AbstractLifecycleHandler {
 
         application.context.put("muwire-home", home.getAbsolutePath())
 
+        System.getProperties().setProperty("awt.useSystemAAFontSettings", "gasp")
+
         def guiPropsFile = new File(home, "gui.properties")
         UISettings uiSettings
         if (guiPropsFile.exists()) {
@@ -84,6 +86,8 @@ class Initialize extends AbstractLifecycleHandler {
                 }
             } else {
                 LookAndFeel chosen = lookAndFeel('system', 'gtk')
+                if (chosen == null)
+                    chosen = lookAndFeel('metal')
                 uiSettings.lnf = chosen.getID()
                 log.info("ended up applying $chosen.name")
             }

gui/griffon-app/lifecycle/Ready.groovy

@@ -48,6 +48,8 @@ class Ready extends AbstractLifecycleHandler {
         } else {
             log.info("creating new properties")
             props = new MuWireSettings()
+            props.embeddedRouter = Boolean.parseBoolean(System.getProperties().getProperty("embeddedRouter"))
+            props.updateType = System.getProperty("updateType","jar")
             def nickname
             while (true) {
                 nickname = JOptionPane.showInputDialog(null,
@@ -74,6 +76,7 @@ class Ready extends AbstractLifecycleHandler {
                 props.downloadLocation = new File(portableDownloads)
             } else {
                 def chooser = new JFileChooser()
+                chooser.setFileHidingEnabled(false)
                 chooser.setDialogTitle("Select a directory where downloads will be saved")
                 chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY)
                 int rv = chooser.showOpenDialog(null)
@@ -98,6 +101,9 @@ class Ready extends AbstractLifecycleHandler {
                 "Can't connect to I2P router", JOptionPane.WARNING_MESSAGE)
             System.exit(0)
         }
+        Runtime.getRuntime().addShutdownHook({
+            core.shutdown()
+        })
         core.startServices()
         application.context.put("muwire-settings", props)
         application.context.put("core",core)

gui/griffon-app/models/com/muwire/gui/AddCommentModel.groovy

@@ -0,0 +1,12 @@
+package com.muwire.gui
+
+import com.muwire.core.SharedFile
+
+import griffon.core.artifact.GriffonModel
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class AddCommentModel {
+    List<SharedFile> selectedFiles
+}

gui/griffon-app/models/com/muwire/gui/ContentPanelModel.groovy

@@ -0,0 +1,59 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import com.muwire.core.Core
+import com.muwire.core.EventBus
+import com.muwire.core.content.ContentControlEvent
+import com.muwire.core.content.ContentManager
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class ContentPanelModel {
+    
+    @MVCMember @Nonnull
+    ContentPanelView view
+    
+    Core core
+    
+    private ContentManager contentManager
+    
+    def rules = []
+    def hits = []
+    
+    @Observable boolean regex
+    @Observable boolean deleteButtonEnabled
+    @Observable boolean trustButtonsEnabled
+    
+    void mvcGroupInit(Map<String,String> args) {
+        contentManager = application.context.get("core").contentManager
+        rules.addAll(contentManager.matchers)
+        core.eventBus.register(ContentControlEvent.class, this)
+    }
+    
+    void mvcGroupDestroy() {
+        core.eventBus.unregister(ContentControlEvent.class, this)
+    }
+    
+    void refresh() {
+        int selectedRule = view.getSelectedRule()
+        rules.clear()
+        rules.addAll(contentManager.matchers)
+        hits.clear()
+        view.rulesTable.model.fireTableDataChanged()
+        view.hitsTable.model.fireTableDataChanged()
+        if (selectedRule >= 0) {
+            view.rulesTable.selectionModel.setSelectionInterval(selectedRule,selectedRule)
+        }
+    }
+    
+    void onContentControlEvent(ContentControlEvent e) {
+        runInsideUIAsync {
+            refresh()
+        }
+    }
+}

gui/griffon-app/models/com/muwire/gui/I2PStatusModel.groovy

@@ -0,0 +1,28 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class I2PStatusModel {
+    @MVCMember @Nonnull
+    I2PStatusController controller
+
+    @Observable int ntcpConnections
+    @Observable int ssuConnections
+    @Observable String networkStatus
+    @Observable boolean floodfill
+    @Observable int participatingTunnels
+    @Observable int activePeers
+    @Observable int receiveBps
+    @Observable int sendBps
+    @Observable int participatingBW
+
+    void mvcGroupInit(Map<String,String> args) {
+        controller.refresh()
+    }
+}

gui/griffon-app/models/com/muwire/gui/MainFrameModel.groovy

@@ -1,23 +1,36 @@
 package com.muwire.gui
 
 import java.util.concurrent.ConcurrentHashMap
+import java.nio.file.Path
+import java.nio.file.Paths
+import java.util.Calendar
+import java.util.UUID
 
 import javax.annotation.Nonnull
 import javax.inject.Inject
 import javax.swing.JOptionPane
 import javax.swing.JTable
+import javax.swing.tree.DefaultMutableTreeNode
+import javax.swing.tree.DefaultTreeModel
+import javax.swing.tree.TreeNode
 
 import com.muwire.core.Core
 import com.muwire.core.InfoHash
 import com.muwire.core.MuWireSettings
 import com.muwire.core.Persona
+import com.muwire.core.RouterDisconnectedEvent
+import com.muwire.core.SharedFile
 import com.muwire.core.connection.ConnectionAttemptStatus
 import com.muwire.core.connection.ConnectionEvent
 import com.muwire.core.connection.DisconnectionEvent
+import com.muwire.core.content.ContentControlEvent
 import com.muwire.core.download.DownloadStartedEvent
 import com.muwire.core.download.Downloader
+import com.muwire.core.files.AllFilesLoadedEvent
+import com.muwire.core.files.DirectoryUnsharedEvent
 import com.muwire.core.files.FileDownloadedEvent
 import com.muwire.core.files.FileHashedEvent
+import com.muwire.core.files.FileHashingEvent
 import com.muwire.core.files.FileLoadedEvent
 import com.muwire.core.files.FileSharedEvent
 import com.muwire.core.files.FileUnsharedEvent
@@ -26,7 +39,10 @@ import com.muwire.core.search.UIResultBatchEvent
 import com.muwire.core.search.UIResultEvent
 import com.muwire.core.trust.TrustEvent
 import com.muwire.core.trust.TrustService
+import com.muwire.core.trust.TrustSubscriptionEvent
+import com.muwire.core.trust.TrustSubscriptionUpdatedEvent
 import com.muwire.core.update.UpdateAvailableEvent
+import com.muwire.core.update.UpdateDownloadedEvent
 import com.muwire.core.upload.UploadEvent
 import com.muwire.core.upload.UploadFinishedEvent
 
@@ -48,31 +64,56 @@ class MainFrameModel {
     FactoryBuilderSupport builder
     @MVCMember @Nonnull
     MainFrameController controller
+    @MVCMember @Nonnull
+    MainFrameView view
     @Inject @Nonnull GriffonApplication application
     @Observable boolean coreInitialized = false
+    @Observable boolean routerPresent
 
     def results = new ConcurrentHashMap<>()
     def downloads = []
     def uploads = []
-    def shared = []
-    def watched = []
+    boolean treeVisible = true
+    def shared 
+    def sharedTree 
+    def treeRoot
+    final Map<SharedFile, TreeNode> fileToNode = new HashMap<>()
     def connectionList = []
     def searches = new LinkedList()
     def trusted = []
     def distrusted = []
+    def subscriptions = []
 
     @Observable int connections
     @Observable String me
-    @Observable boolean downloadActionEnabled
-    @Observable boolean trustButtonsEnabled
+    @Observable int loadedFiles
+    @Observable File hashingFile
     @Observable boolean cancelButtonEnabled
     @Observable boolean retryButtonEnabled
+    @Observable boolean pauseButtonEnabled
+    @Observable boolean clearButtonEnabled
+    @Observable String resumeButtonText
+    @Observable boolean addCommentButtonEnabled
+    @Observable boolean subscribeButtonEnabled
+    @Observable boolean markNeutralFromTrustedButtonEnabled
+    @Observable boolean markDistrustedButtonEnabled
+    @Observable boolean markNeutralFromDistrustedButtonEnabled
+    @Observable boolean markTrustedButtonEnabled
+    @Observable boolean reviewButtonEnabled
+    @Observable boolean updateButtonEnabled
+    @Observable boolean unsubscribeButtonEnabled
     
-    private final Set<InfoHash> infoHashes = new HashSet<>()
+    @Observable boolean searchesPaneButtonEnabled
+    @Observable boolean downloadsPaneButtonEnabled
+    @Observable boolean uploadsPaneButtonEnabled
+    @Observable boolean monitorPaneButtonEnabled
+    @Observable boolean trustPaneButtonEnabled
+    
+    @Observable Downloader downloader
 
     private final Set<InfoHash> downloadInfoHashes = new HashSet<>()
 
-    volatile Core core    
+    @Observable volatile Core core
 
     private long lastRetryTime = System.currentTimeMillis()
 
@@ -81,7 +122,12 @@ class MainFrameModel {
     void updateTablePreservingSelection(String tableName) {
         def downloadTable = builder.getVariable(tableName)
         int selectedRow = downloadTable.getSelectedRow()
+        while(true) {
+            try {
                 downloadTable.model.fireTableDataChanged()
+                break
+            } catch (IllegalArgumentException iae) {} // caused by underlying model changing while table is sorted
+        }
         downloadTable.selectionModel.setSelectionInterval(selectedRow,selectedRow)
     }
 
@@ -89,6 +135,10 @@ class MainFrameModel {
 
         uiSettings = application.context.get("ui-settings")
         
+        shared = []
+        treeRoot = new DefaultMutableTreeNode()
+        sharedTree = new DefaultTreeModel(treeRoot)
+
         Timer timer = new Timer("download-pumper", true)
         timer.schedule({
             runInsideUIAsync {
@@ -96,18 +146,27 @@ class MainFrameModel {
                     return
 
                 // remove cancelled or finished downloads
+                if (!clearButtonEnabled || uiSettings.clearCancelledDownloads || uiSettings.clearFinishedDownloads) {
                     def toRemove = []
                     downloads.each {
-                    if (uiSettings.clearCancelledDownloads &&
-                        it.downloader.getCurrentState() == Downloader.DownloadState.CANCELLED)
+                        if (it.downloader.getCurrentState() == Downloader.DownloadState.CANCELLED) {
+                            if (uiSettings.clearCancelledDownloads) {
                                 toRemove << it
-                    if (uiSettings.clearFinishedDownloads &&
-                        it.downloader.getCurrentState() == Downloader.DownloadState.FINISHED)
+                            } else {
+                                clearButtonEnabled = true
+                            }
+                        } else if (it.downloader.getCurrentState() == Downloader.DownloadState.FINISHED) {
+                            if (uiSettings.clearFinishedDownloads) {
                                 toRemove << it
+                            } else {
+                                clearButtonEnabled = true
+                            }
+                        }
                     }
                     toRemove.each {
                         downloads.remove(it)
                     }
+                }
 
                 builder.getVariable("uploads-table")?.model.fireTableDataChanged()
 
@@ -120,6 +179,7 @@ class MainFrameModel {
         application.addPropertyChangeListener("core", {e ->
             coreInitialized = (e.getNewValue() != null)
             core = e.getNewValue()
+            routerPresent = core.router != null
             me = core.me.getHumanReadableName()
             core.eventBus.register(UIResultEvent.class, this)
             core.eventBus.register(UIResultBatchEvent.class, this)
@@ -127,6 +187,7 @@ class MainFrameModel {
             core.eventBus.register(ConnectionEvent.class, this)
             core.eventBus.register(DisconnectionEvent.class, this)
             core.eventBus.register(FileHashedEvent.class, this)
+            core.eventBus.register(FileHashingEvent.class, this)
             core.eventBus.register(FileLoadedEvent.class, this)
             core.eventBus.register(UploadEvent.class, this)
             core.eventBus.register(UploadFinishedEvent.class, this)
@@ -135,11 +196,24 @@ class MainFrameModel {
             core.eventBus.register(UpdateAvailableEvent.class, this)
             core.eventBus.register(FileDownloadedEvent.class, this)
             core.eventBus.register(FileUnsharedEvent.class, this)
+            core.eventBus.register(RouterDisconnectedEvent.class, this)
+            core.eventBus.register(AllFilesLoadedEvent.class, this)
+            core.eventBus.register(UpdateDownloadedEvent.class, this)
+            core.eventBus.register(TrustSubscriptionUpdatedEvent.class, this)
+
+            core.muOptions.watchedKeywords.each {
+                core.eventBus.publish(new ContentControlEvent(term : it, regex: false, add: true))
+            }
+            core.muOptions.watchedRegexes.each {
+                core.eventBus.publish(new ContentControlEvent(term : it, regex: true, add: true))
+            }
             
             timer.schedule({
+                if (core.shutdown.get())
+                    return
                 int retryInterval = core.muOptions.downloadRetryInterval
                 if (retryInterval > 0) {
-                    retryInterval *= 60000
+                    retryInterval *= 1000
                     long now = System.currentTimeMillis()
                     if (now - lastRetryTime > retryInterval) {
                         lastRetryTime = now
@@ -155,20 +229,41 @@ class MainFrameModel {
 
                     }
                 }
-            }, 60000, 60000)
+            }, 1000, 1000)
 
             runInsideUIAsync {
                 trusted.addAll(core.trustService.good.values())
                 distrusted.addAll(core.trustService.bad.values())
 
-                watched.addAll(core.muOptions.watchedDirectories)
-                builder.getVariable("watched-directories-table").model.fireTableDataChanged()
-                watched.each { core.eventBus.publish(new FileSharedEvent(file : new File(it))) }
+                resumeButtonText = "Retry"
+                
+                searchesPaneButtonEnabled = false
+                downloadsPaneButtonEnabled = true
+                uploadsPaneButtonEnabled = true
+                monitorPaneButtonEnabled = true
+                trustPaneButtonEnabled = true
             }
         })
 
     }
 
+    void onAllFilesLoadedEvent(AllFilesLoadedEvent e) {
+        runInsideUIAsync {
+            core.muOptions.watchedDirectories.each { core.eventBus.publish(new FileSharedEvent(file : new File(it))) }
+
+            core.muOptions.trustSubscriptions.each {
+                core.eventBus.publish(new TrustSubscriptionEvent(persona : it, subscribe : true))
+            }
+        }
+    }
+
+    void onUpdateDownloadedEvent(UpdateDownloadedEvent e) {
+        runInsideUIAsync {
+            JOptionPane.showMessageDialog(null, "MuWire $e.version has been downloaded.  You can update now",
+                "Update Downloaded", JOptionPane.INFORMATION_MESSAGE)
+        }
+    }
+
     void onUIResultEvent(UIResultEvent e) {
         MVCGroup resultsGroup = results.get(e.uuid)
         resultsGroup?.model.handleResult(e)
@@ -176,7 +271,7 @@ class MainFrameModel {
 
     void onUIResultBatchEvent(UIResultBatchEvent e) {
         MVCGroup resultsGroup = results.get(e.uuid)
-        resultsGroup?.model.handleResultBatch(e.results)
+        resultsGroup?.model?.handleResultBatch(e.results)
     }
 
     void onDownloadStartedEvent(DownloadStartedEvent e) {
@@ -220,38 +315,63 @@ class MainFrameModel {
         }
     }
 
+    void onFileHashingEvent(FileHashingEvent e) {
+        runInsideUIAsync {
+            hashingFile = e.hashingFile
+        }
+    }
+
     void onFileHashedEvent(FileHashedEvent e) {
+        runInsideUIAsync {
+            hashingFile = null
+        }
         if (e.error != null)
             return // TODO do something
-        if (infoHashes.contains(e.sharedFile.infoHash))
-            return    
-        infoHashes.add(e.sharedFile.infoHash)
         runInsideUIAsync {
             shared << e.sharedFile
+            loadedFiles = shared.size()
             JTable table = builder.getVariable("shared-files-table")
             table.model.fireTableDataChanged()
+            insertIntoTree(e.sharedFile)
+            loadedFiles = fileToNode.size()
         }
     }
 
     void onFileLoadedEvent(FileLoadedEvent e) {
-        if (infoHashes.contains(e.loadedFile.infoHash))
-            return
-        infoHashes.add(e.loadedFile.infoHash)
         runInsideUIAsync {
             shared << e.loadedFile
+            loadedFiles = shared.size()
             JTable table = builder.getVariable("shared-files-table")
             table.model.fireTableDataChanged()
+            insertIntoTree(e.loadedFile)
+            loadedFiles = fileToNode.size()
         }
     }
 
     void onFileUnsharedEvent(FileUnsharedEvent e) {
-        InfoHash infohash = e.unsharedFile.infoHash
-        if (!infoHashes.remove(infohash))
-            return
         runInsideUIAsync {
             shared.remove(e.unsharedFile)
-            JTable table = builder.getVariable("shared-files-table")
-            table.model.fireTableDataChanged()
+            loadedFiles = shared.size()
+            
+            def dmtn = fileToNode.remove(e.unsharedFile)
+            if (dmtn != null) {
+                loadedFiles = fileToNode.size()
+                while (true) {
+                    def parent = dmtn.getParent()
+                    parent.remove(dmtn)
+                    if (parent == treeRoot)
+                        break
+                    if (parent.getChildCount() == 0) {
+                        File file = parent.getUserObject().file
+                        if (core.muOptions.watchedDirectories.contains(file.toString()))
+                            core.eventBus.publish(new DirectoryUnsharedEvent(directory : parent.getUserObject().file))
+                        dmtn = parent
+                        continue
+                    }
+                    break
+                }
+            } 
+            view.refreshSharedFiles()
         }
     }
 
@@ -282,11 +402,21 @@ class MainFrameModel {
             updateTablePreservingSelection("trusted-table")
             updateTablePreservingSelection("distrusted-table")
 
-            results.values().each { 
-                it.view.pane.getClientProperty("results-table")?.model.fireTableDataChanged()
+            results.values().each { MVCGroup group ->
+                if (group.alive) {
+                    group.view.pane.getClientProperty("results-table")?.model.fireTableDataChanged()
                 }
             }
         }
+    }
+
+    void onTrustSubscriptionUpdatedEvent(TrustSubscriptionUpdatedEvent e) {
+        runInsideUIAsync {
+            if (!subscriptions.contains(e.trustList))
+                subscriptions << e.trustList
+            updateTablePreservingSelection("subscription-table")
+        }
+    }
 
     void onQueryEvent(QueryEvent e) {
         if (e.replyTo == core.me.destination)
@@ -309,10 +439,32 @@ class MainFrameModel {
                 return
         }
         runInsideUIAsync {
-            searches.addFirst(new IncomingSearch(search : search, replyTo : e.replyTo, originator : e.originator))
+            JTable table = builder.getVariable("searches-table")
+
+            Boolean searchFound = false
+            Iterator searchIter = searches.iterator()
+            while ( searchIter.hasNext() ) {
+                IncomingSearch searchEle = searchIter.next()
+                if ( searchEle.search == search
+                        && searchEle.originator == e.originator
+                        && searchEle.uuid == e.searchEvent.getUuid() ) {
+                    searchIter.remove()
+                    table.model.fireTableDataChanged()
+                    searchFound = true
+                    searchEle.count++
+                    searchEle.timestamp = Calendar.getInstance()
+                    searches.addFirst(searchEle)
+                    break
+                }
+            }
+
+            if (!searchFound) {
+                searches.addFirst(new IncomingSearch(search, e.replyTo, e.originator, e.searchEvent.getUuid()))
+            }
+
             while(searches.size() > 200)
                 searches.removeLast()
-            JTable table = builder.getVariable("searches-table")
+
             table.model.fireTableDataChanged()
         }
     }
@@ -321,6 +473,18 @@ class MainFrameModel {
         String search
         Destination replyTo
         Persona originator
+        long count
+        UUID uuid
+        Calendar timestamp
+
+        IncomingSearch( String search, Destination replyTo, Persona originator, UUID uuid ) {
+            this.search = search
+            this.replyTo = replyTo
+            this.originator = originator
+            this.uuid = uuid
+            this.count = 1
+            this.timestamp = Calendar.getInstance()
+        }
     }
 
     void onUpdateAvailableEvent(UpdateAvailableEvent e) {
@@ -335,17 +499,60 @@ class MainFrameModel {
         }
     }
 
+    void onRouterDisconnectedEvent(RouterDisconnectedEvent e) {
+        runInsideUIAsync {
+            JOptionPane.showMessageDialog(null, "MuWire lost connection to the I2P router and will now exit.",
+                "Connection to I2P router lost", JOptionPane.WARNING_MESSAGE)
+            System.exit(0)
+        }
+    }
+
     void onFileDownloadedEvent(FileDownloadedEvent e) {
         if (!core.muOptions.shareDownloadedFiles)
             return
-        infoHashes.add(e.downloadedFile.infoHash)
         runInsideUIAsync {
             shared << e.downloadedFile
             JTable table = builder.getVariable("shared-files-table")
             table.model.fireTableDataChanged()
+            insertIntoTree(e.downloadedFile)
+            loadedFiles = fileToNode.size()
         }
     }
     
+    private void insertIntoTree(SharedFile file) {
+        List<File> parents = new ArrayList<>()
+        File tmp = file.file.getParentFile()
+        while(tmp.getParent() != null) {
+            parents << tmp
+            tmp = tmp.getParentFile()
+        }
+        Collections.reverse(parents)
+        TreeNode node = treeRoot
+        for(File path : parents) {
+            boolean exists = false
+            def children = node.children()
+            def child = null
+            while(children.hasMoreElements()) {
+                child = children.nextElement()
+                def userObject = child.getUserObject()
+                if (userObject != null && userObject.file == path) {
+                    exists = true
+                    break
+                }
+            }
+            if (!exists) {
+                child = new DefaultMutableTreeNode(new InterimTreeNode(path))
+                node.add(child)
+            }
+            node = child
+        }
+        
+        def dmtn = new DefaultMutableTreeNode(file)
+        fileToNode.put(file, dmtn)
+        node.add(dmtn)
+        view.refreshSharedFiles()
+    }
+
     private static class UIConnection {
         Destination destination
         boolean incoming

gui/griffon-app/models/com/muwire/gui/MuWireStatusModel.groovy

@@ -0,0 +1,25 @@
+package com.muwire.gui
+
+import javax.annotation.Nonnull
+
+import griffon.core.artifact.GriffonModel
+import griffon.inject.MVCMember
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class MuWireStatusModel {
+
+    @MVCMember @Nonnull
+    MuWireStatusController controller
+
+    @Observable int incomingConnections
+    @Observable int outgoingConnections
+    @Observable int knownHosts
+    @Observable int sharedFiles
+    @Observable int downloads
+
+    void mvcGroupInit(Map<String,String> args) {
+        controller.refresh()
+    }
+}