From cc085755aa3fd79fb51ec8f1de8d46484df3a804 Mon Sep 17 00:00:00 2001
From: jrandom <jrandom>
Date: Sat, 21 Aug 2004 22:39:27 +0000
Subject: [PATCH] oOo's patch to add support for temporary name<-->destination
 assignment (w00t!) to use this, make a link going to
 http://some.name.i2p/some/path/blah?i2paddresshelper=base64Destination e.g.
 http://whitehouse.gov.i2p/?i2paddresshelper=FpCkYW5pwVz36sSHoBuRT4ZvGif9QC9oQUWfz-wu4zEnJ1ewlAvinPuw3YnXUKmgLFZ0UY3wB7wqd0eQYiW2ZV1bwVhXvsyGV5ZehzxGaFu05IspCJjyaMIe90z5fyda4KgzyBwHKqwjGX57SMyn2cZhXbCKF6aNuipWxYOnL65uATDbw3jShEtL9v9299ohhGA3EcrYk3u86FgLmsOdi2GZruxy2RzioA-VKhaZl4RSJs6dFHPUYWgeLF3gT7Ciy-HbMZdDuiLTEX7mUlO0UZwnzT8mjUDeeYfyWtv9arwv-rAMeXxAVUYm7X2dDHN8TvmQCZ~LiQrnGmGReSIDKVT4u59xZX2Qg0GZf0fA5LRSW1zHLrlZWDJfNeESW57RlOkA9DDDOxwSVSw8LUQN-hPsoz~AgwA-vDklNWULqvp4lLifEJUlr5ZmnWrviLr6W6cHhdJBl89VzMThoknb5UibIvwTnu~tfA0rkyILXX07hdaoXF~prptuOhMtEcV2AAAA
 this is better than the existing http://i2p/base64Destination/ since images
 at that page will now resolve the name is resolved only if/when the hosts.txt
 doesn't have a matching entry (aka no spoofing duck.i2p), but the name is
 *not* persisted to hosts.txt - if you restart your tunnel (or router, if
 they're in the same JVM), the address helper is lost

---
 .../i2p/i2ptunnel/I2PTunnelHTTPClient.java    | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelHTTPClient.java b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelHTTPClient.java
index 445d92680..5d4a85b11 100644
--- a/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelHTTPClient.java
+++ b/apps/i2ptunnel/java/src/net/i2p/i2ptunnel/I2PTunnelHTTPClient.java
@@ -13,6 +13,7 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 import java.util.StringTokenizer;
+import java.util.HashMap;
 
 import net.i2p.I2PAppContext;
 import net.i2p.I2PException;
@@ -48,6 +49,8 @@ public class I2PTunnelHTTPClient extends I2PTunnelClientBase implements Runnable
 
     private List proxyList;
 
+    private HashMap addressHelpers = new HashMap();
+
     private final static byte[] ERR_REQUEST_DENIED =
         ("HTTP/1.1 403 Access Denied\r\n"+
          "Content-Type: text/html; charset=iso-8859-1\r\n"+
@@ -196,6 +199,34 @@ public class I2PTunnelHTTPClient extends I2PTunnelClientBase implements Runnable
                     if (host.toLowerCase().endsWith(".i2p")) {
                         destination = host;
                         host = getHostName(destination);
+                        if (host == "i2p") {
+                            int pos2;
+                            if ((pos2 = line.indexOf("?")) != -1) {
+                                // Try to find an address helper in the fragments
+                                String fragments = line.substring(pos2 + 1);
+                                pos2 = fragments.indexOf(" ");
+                                fragments = fragments.substring(0, pos2);
+                                fragments = fragments + "&";
+                                String fragment;
+                                while(fragments.length() > 0) {
+                                    pos2 = fragments.indexOf("&");
+                                    fragment = fragments.substring(0, pos2);
+                                    fragments = fragments.substring(pos2 + 1);
+                                    if (fragment.startsWith("i2paddresshelper")) {
+                                        pos2 = fragment.indexOf("=");
+                                        if (pos2 >= 0) {
+                                            addressHelpers.put(destination,fragment.substring(pos2 + 1));
+                                        }
+                                    }
+                                }
+                            }
+
+                            String addressHelper = (String) addressHelpers.get(destination);
+                            if (addressHelper != null) {
+                                destination = addressHelper;
+                                host = getHostName(destination);
+                            }
+                        }
                         line = method + " " + request.substring(pos);
                     } else if (host.indexOf(".") != -1) {
                         // The request must be forwarded to a WWW proxy