zzz
efdc8e5df0
- Put B32 instead of B64 in Host: header, saves 450 bytes
- Eliminate some redundant lookups
- Fix http://i2p/b64/ and /eepproxy/site/ requests
- Disallow a port specified for an i2p address
- Cleanup and comments
1048 lines
48 KiB
Java
1048 lines
48 KiB
Java
/* I2PTunnel is GPL'ed (with the exception mentioned in I2PTunnel.java)
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* (c) 2003 - 2004 mihi
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*/
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package net.i2p.i2ptunnel;
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import java.io.ByteArrayOutputStream;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.OutputStream;
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import java.net.Socket;
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import java.net.SocketException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Properties;
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import java.util.StringTokenizer;
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import net.i2p.I2PAppContext;
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import net.i2p.I2PException;
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import net.i2p.client.streaming.I2PSocket;
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import net.i2p.client.streaming.I2PSocketManager;
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import net.i2p.client.streaming.I2PSocketOptions;
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import net.i2p.data.Base32;
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import net.i2p.data.DataFormatException;
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import net.i2p.data.DataHelper;
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import net.i2p.data.Destination;
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import net.i2p.util.EventDispatcher;
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import net.i2p.util.FileUtil;
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import net.i2p.util.Log;
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import net.i2p.util.Translate;
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/**
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* Act as a mini HTTP proxy, handling various different types of requests,
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* forwarding them through I2P appropriately, and displaying the reply. Supported
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* request formats are: <pre>
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* $method http://$site[$port]/$path $protocolVersion
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* or
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* $method $path $protocolVersion\nHost: $site
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* or
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* $method http://i2p/$b64key/$path $protocolVersion
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* or
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* $method /$site/$path $protocolVersion
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* or (deprecated)
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* $method /eepproxy/$site/$path $protocolVersion
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* </pre>
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*
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* Note that http://i2p/$b64key/... and /eepproxy/$site/... are not recommended
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* in browsers or other user-visible applications, as relative links will not
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* resolve correctly, cookies won't work, etc.
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*
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* If the $site resolves with the I2P naming service, then it is directed towards
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* that eepsite, otherwise it is directed towards this client's outproxy (typically
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* "squid.i2p"). Only HTTP is supported (no HTTPS, ftp, mailto, etc). Both GET
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* and POST have been tested, though other $methods should work.
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*
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*/
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public class I2PTunnelHTTPClient extends I2PTunnelClientBase implements Runnable {
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private static final Log _log = new Log(I2PTunnelHTTPClient.class);
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protected final List proxyList = new ArrayList();
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private HashMap addressHelpers = new HashMap();
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/**
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* These are backups if the xxx.ht error page is missing.
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*/
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private final static byte[] ERR_REQUEST_DENIED =
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("HTTP/1.1 403 Access Denied\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: REQUEST DENIED</H1>"+
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"You attempted to connect to a non-I2P website or location.<BR>")
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.getBytes();
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private final static byte[] ERR_DESTINATION_UNKNOWN =
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("HTTP/1.1 503 Service Unavailable\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: DESTINATION NOT FOUND</H1>"+
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"That I2P Destination was not found. Perhaps you pasted in the "+
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"wrong BASE64 I2P Destination or the link you are following is "+
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"bad. The host (or the WWW proxy, if you're using one) could also "+
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"be temporarily offline. You may want to <b>retry</b>. "+
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"Could not find the following Destination:<BR><BR><div>")
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.getBytes();
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/*****
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private final static byte[] ERR_TIMEOUT =
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("HTTP/1.1 504 Gateway Timeout\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n\r\n"+
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"<html><body><H1>I2P ERROR: TIMEOUT</H1>"+
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"That Destination was reachable, but timed out getting a "+
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"response. This is likely a temporary error, so you should simply "+
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"try to refresh, though if the problem persists, the remote "+
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"destination may have issues. Could not get a response from "+
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"the following Destination:<BR><BR>")
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.getBytes();
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*****/
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private final static byte[] ERR_NO_OUTPROXY =
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("HTTP/1.1 503 Service Unavailable\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: No outproxy found</H1>"+
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"Your request was for a site outside of I2P, but you have no "+
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"HTTP outproxy configured. Please configure an outproxy in I2PTunnel")
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.getBytes();
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private final static byte[] ERR_AHELPER_CONFLICT =
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("HTTP/1.1 409 Conflict\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: Destination key conflict</H1>"+
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"The addresshelper link you followed specifies a different destination key "+
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"than a host entry in your host database. "+
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"Someone could be trying to impersonate another eepsite, "+
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"or people have given two eepsites identical names.<p>"+
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"You can resolve the conflict by considering which key you trust, "+
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"and either discarding the addresshelper link, "+
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"discarding the host entry from your host database, "+
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"or naming one of them differently.<p>")
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.getBytes();
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private final static byte[] ERR_BAD_PROTOCOL =
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("HTTP/1.1 403 Bad Protocol\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: NON-HTTP PROTOCOL</H1>"+
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"The request uses a bad protocol. "+
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"The I2P HTTP Proxy supports http:// requests ONLY. Other protocols such as https:// and ftp:// are not allowed.<BR>")
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.getBytes();
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private final static byte[] ERR_LOCALHOST =
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("HTTP/1.1 403 Access Denied\r\n"+
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"Content-Type: text/html; charset=iso-8859-1\r\n"+
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"Cache-control: no-cache\r\n"+
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"\r\n"+
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"<html><body><H1>I2P ERROR: REQUEST DENIED</H1>"+
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"Your browser is misconfigured. Do not use the proxy to access the router console or other localhost destinations.<BR>")
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.getBytes();
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/** used to assign unique IDs to the threads / clients. no logic or functionality */
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private static volatile long __clientId = 0;
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private static final File _errorDir = new File(I2PAppContext.getGlobalContext().getBaseDir(), "docs");
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public I2PTunnelHTTPClient(int localPort, Logging l, I2PSocketManager sockMgr, I2PTunnel tunnel, EventDispatcher notifyThis, long clientId) {
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super(localPort, l, sockMgr, tunnel, notifyThis, clientId);
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// proxyList = new ArrayList();
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setName(getLocalPort() + " -> HTTPClient [NO PROXIES]");
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startRunning();
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notifyEvent("openHTTPClientResult", "ok");
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}
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/**
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* @throws IllegalArgumentException if the I2PTunnel does not contain
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* valid config to contact the router
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*/
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public I2PTunnelHTTPClient(int localPort, Logging l, boolean ownDest,
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String wwwProxy, EventDispatcher notifyThis,
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I2PTunnel tunnel) throws IllegalArgumentException {
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super(localPort, ownDest, l, notifyThis, "HTTPHandler " + (++__clientId), tunnel);
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//proxyList = new ArrayList(); // We won't use outside of i2p
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if (waitEventValue("openBaseClientResult").equals("error")) {
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notifyEvent("openHTTPClientResult", "error");
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return;
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}
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if (wwwProxy != null) {
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StringTokenizer tok = new StringTokenizer(wwwProxy, ", ");
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while (tok.hasMoreTokens())
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proxyList.add(tok.nextToken().trim());
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}
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setName(getLocalPort() + " -> HTTPClient [WWW outproxy list: " + wwwProxy + "]");
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startRunning();
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notifyEvent("openHTTPClientResult", "ok");
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}
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private String getPrefix(long requestId) { return "Client[" + _clientId + "/" + requestId + "]: "; }
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private String selectProxy() {
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synchronized (proxyList) {
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int size = proxyList.size();
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if (size <= 0) {
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if (_log.shouldLog(Log.INFO))
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_log.info("Proxy list is empty - no outproxy available");
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l.log("Proxy list is emtpy - no outproxy available");
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return null;
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}
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int index = I2PAppContext.getGlobalContext().random().nextInt(size);
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String proxy = (String)proxyList.get(index);
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return proxy;
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}
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}
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private static final int DEFAULT_READ_TIMEOUT = 60*1000;
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/**
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* create the default options (using the default timeout, etc)
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* unused?
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*/
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@Override
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protected I2PSocketOptions getDefaultOptions() {
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Properties defaultOpts = getTunnel().getClientOptions();
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if (!defaultOpts.contains(I2PSocketOptions.PROP_READ_TIMEOUT))
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defaultOpts.setProperty(I2PSocketOptions.PROP_READ_TIMEOUT, ""+DEFAULT_READ_TIMEOUT);
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//if (!defaultOpts.contains("i2p.streaming.inactivityTimeout"))
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// defaultOpts.setProperty("i2p.streaming.inactivityTimeout", ""+DEFAULT_READ_TIMEOUT);
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I2PSocketOptions opts = sockMgr.buildOptions(defaultOpts);
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if (!defaultOpts.containsKey(I2PSocketOptions.PROP_CONNECT_TIMEOUT))
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opts.setConnectTimeout(DEFAULT_CONNECT_TIMEOUT);
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return opts;
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}
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/**
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* create the default options (using the default timeout, etc)
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*
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*/
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@Override
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protected I2PSocketOptions getDefaultOptions(Properties overrides) {
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Properties defaultOpts = getTunnel().getClientOptions();
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defaultOpts.putAll(overrides);
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if (!defaultOpts.contains(I2PSocketOptions.PROP_READ_TIMEOUT))
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defaultOpts.setProperty(I2PSocketOptions.PROP_READ_TIMEOUT, ""+DEFAULT_READ_TIMEOUT);
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if (!defaultOpts.contains("i2p.streaming.inactivityTimeout"))
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defaultOpts.setProperty("i2p.streaming.inactivityTimeout", ""+DEFAULT_READ_TIMEOUT);
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// delayed start
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verifySocketManager();
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I2PSocketOptions opts = sockMgr.buildOptions(defaultOpts);
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if (!defaultOpts.containsKey(I2PSocketOptions.PROP_CONNECT_TIMEOUT))
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opts.setConnectTimeout(DEFAULT_CONNECT_TIMEOUT);
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return opts;
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}
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private InternalSocketRunner isr;
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/**
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* Actually start working on incoming connections.
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* Overridden to start an internal socket too.
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*
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*/
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@Override
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public void startRunning() {
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super.startRunning();
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this.isr = new InternalSocketRunner(this);
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}
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/**
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* Overridden to close internal socket too.
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*/
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@Override
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public boolean close(boolean forced) {
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boolean rv = super.close(forced);
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if (this.isr != null)
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this.isr.stopRunning();
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return rv;
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}
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private static final boolean DEFAULT_GZIP = true;
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// all default to false
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public static final String PROP_REFERER = "i2ptunnel.httpclient.sendReferer";
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public static final String PROP_USER_AGENT = "i2ptunnel.httpclient.sendUserAgent";
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public static final String PROP_VIA = "i2ptunnel.httpclient.sendVia";
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public static final String PROP_JUMP_SERVERS = "i2ptunnel.httpclient.jumpServers";
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private static long __requestId = 0;
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protected void clientConnectionRun(Socket s) {
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InputStream in = null;
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OutputStream out = null;
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String targetRequest = null;
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boolean usingWWWProxy = false;
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boolean usingInternalServer = false;
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String currentProxy = null;
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long requestId = ++__requestId;
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try {
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out = s.getOutputStream();
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InputReader reader = new InputReader(s.getInputStream());
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String line, method = null, protocol = null, host = null, destination = null;
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StringBuilder newRequest = new StringBuilder();
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int ahelper = 0;
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while ((line = reader.readLine(method)) != null) {
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line = line.trim();
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if (_log.shouldLog(Log.DEBUG))
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_log.debug(getPrefix(requestId) + "Line=[" + line + "]");
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String lowercaseLine = line.toLowerCase();
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if (lowercaseLine.startsWith("connection: ") ||
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lowercaseLine.startsWith("keep-alive: ") ||
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lowercaseLine.startsWith("proxy-connection: "))
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continue;
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if (method == null) { // first line (GET /base64/realaddr)
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if (_log.shouldLog(Log.DEBUG))
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_log.debug(getPrefix(requestId) + "First line [" + line + "]");
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int pos = line.indexOf(" ");
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if (pos == -1) break;
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method = line.substring(0, pos);
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// TODO use Java URL class to make all this simpler and more robust
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// That will also fix IPV6 [a:b:c]
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String request = line.substring(pos + 1);
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if (request.startsWith("/") && getTunnel().getClientOptions().getProperty("i2ptunnel.noproxy") != null) {
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// what is this for ???
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request = "http://i2p" + request;
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} else if (request.startsWith("/eepproxy/")) {
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// /eepproxy/foo.i2p/bar/baz.html HTTP/1.0
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String subRequest = request.substring("/eepproxy/".length());
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int protopos = subRequest.indexOf(" ");
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String uri = subRequest.substring(0, protopos);
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if (uri.indexOf("/") == -1) {
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uri = uri + "/";
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}
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// "http://" + "foo.i2p/bar/baz.html" + " HTTP/1.0"
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request = "http://" + uri + subRequest.substring(protopos);
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} else if (request.toLowerCase().startsWith("http://i2p/")) {
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// http://i2p/b64key/bar/baz.html HTTP/1.0
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String subRequest = request.substring("http://i2p/".length());
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int protopos = subRequest.indexOf(" ");
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String uri = subRequest.substring(0, protopos);
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if (uri.indexOf("/") == -1) {
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uri = uri + "/";
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}
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// "http://" + "b64key/bar/baz.html" + " HTTP/1.0"
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request = "http://" + uri + subRequest.substring(protopos);
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}
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pos = request.indexOf("//");
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if (pos == -1) {
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method = null;
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break;
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}
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protocol = request.substring(0, pos + 2);
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request = request.substring(pos + 2);
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targetRequest = request;
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// pos is the start of the path
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pos = request.indexOf("/");
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if (pos == -1) {
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method = null;
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break;
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}
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host = request.substring(0, pos);
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// parse port
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int posPort = host.indexOf(":");
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int port = 80;
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if(posPort != -1) {
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String[] parts = host.split(":");
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host = parts[0];
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try {
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port = Integer.parseInt(parts[1]);
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} catch(Exception exc) {
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// TODO: log this
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}
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}
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// Go through the various types of host names, set
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// the host and destination variables accordingly,
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// and transform the first line.
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// For all i2p network hosts, ensure that the host is a
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// Base 32 hostname so that we do not reveal our name for it
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// in our addressbook (all naming is local),
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// and it is removed from the request line.
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if (host.length() >= 516 && host.indexOf(".") < 0) {
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// http://b64key/bar/baz.html
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destination = host;
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host = getHostName(destination);
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line = method + ' ' + request.substring(pos);
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} else if (host.toLowerCase().equals("proxy.i2p")) {
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// so we don't do any naming service lookups
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destination = host;
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usingInternalServer = true;
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} else if (host.toLowerCase().endsWith(".i2p")) {
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// Destination gets the host name
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destination = host;
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// Host becomes the destination key
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host = getHostName(destination);
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int pos2;
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if ((pos2 = request.indexOf("?")) != -1) {
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// Try to find an address helper in the fragments
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// and split the request into it's component parts for rebuilding later
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String ahelperKey = null;
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boolean ahelperConflict = false;
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String fragments = request.substring(pos2 + 1);
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String uriPath = request.substring(0, pos2);
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pos2 = fragments.indexOf(" ");
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String protocolVersion = fragments.substring(pos2 + 1);
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String urlEncoding = "";
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fragments = fragments.substring(0, pos2);
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String initialFragments = fragments;
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fragments = fragments + "&";
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String fragment;
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while(fragments.length() > 0) {
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pos2 = fragments.indexOf("&");
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fragment = fragments.substring(0, pos2);
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fragments = fragments.substring(pos2 + 1);
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// Fragment looks like addresshelper key
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if (fragment.startsWith("i2paddresshelper=")) {
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pos2 = fragment.indexOf("=");
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ahelperKey = fragment.substring(pos2 + 1);
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// Key contains data, lets not ignore it
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if (ahelperKey != null) {
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// Host resolvable only with addresshelper
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if ( (host == null) || ("i2p".equals(host)) )
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{
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// Cannot check, use addresshelper key
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addressHelpers.put(destination,ahelperKey);
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} else {
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// Host resolvable from database, verify addresshelper key
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// Silently bypass correct keys, otherwise alert
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if (!host.equals(ahelperKey))
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{
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// Conflict: handle when URL reconstruction done
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ahelperConflict = true;
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if (_log.shouldLog(Log.WARN))
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_log.warn(getPrefix(requestId) + "Addresshelper key conflict for site [" + destination + "], trusted key [" + host + "], specified key [" + ahelperKey + "].");
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}
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}
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}
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} else {
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// Other fragments, just pass along
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// Append each fragment to urlEncoding
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if ("".equals(urlEncoding)) {
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urlEncoding = "?" + fragment;
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} else {
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urlEncoding = urlEncoding + "&" + fragment;
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}
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}
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}
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// Reconstruct the request minus the i2paddresshelper GET var
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request = uriPath + urlEncoding + " " + protocolVersion;
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// Did addresshelper key conflict?
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if (ahelperConflict)
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{
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if (out != null) {
|
|
long alias = I2PAppContext.getGlobalContext().random().nextLong();
|
|
String trustedURL = protocol + uriPath + urlEncoding;
|
|
String conflictURL = protocol + alias + ".i2p/?" + initialFragments;
|
|
byte[] header = getErrorPage("ahelper-conflict", ERR_AHELPER_CONFLICT);
|
|
out.write(header);
|
|
out.write(_("To visit the destination in your host database, click <a href=\"{0}\">here</a>. To visit the conflicting addresshelper link by temporarily giving it a random alias, click <a href=\"{1}\">here</a>.", trustedURL, conflictURL).getBytes("UTF-8"));
|
|
out.write(("<p></div>").getBytes());
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
}
|
|
}
|
|
|
|
String addressHelper = (String) addressHelpers.get(destination);
|
|
if (addressHelper != null) {
|
|
destination = addressHelper;
|
|
host = getHostName(destination);
|
|
ahelper = 1;
|
|
}
|
|
|
|
line = method + " " + request.substring(pos);
|
|
} else if (host.toLowerCase().equals("localhost") || host.equals("127.0.0.1")) {
|
|
if (out != null) {
|
|
out.write(getErrorPage("localhost", ERR_LOCALHOST));
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
} else if (host.indexOf(".") != -1) {
|
|
// rebuild host
|
|
host = host + ":" + port;
|
|
// The request must be forwarded to a WWW proxy
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug("Before selecting outproxy for " + host);
|
|
currentProxy = selectProxy();
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug("After selecting outproxy for " + host + ": " + currentProxy);
|
|
if (currentProxy == null) {
|
|
if (_log.shouldLog(Log.WARN))
|
|
_log.warn(getPrefix(requestId) + "Host wants to be outproxied, but we dont have any!");
|
|
l.log("No HTTP outproxy found for the request.");
|
|
if (out != null) {
|
|
out.write(getErrorPage("noproxy", ERR_NO_OUTPROXY));
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
}
|
|
destination = currentProxy;
|
|
usingWWWProxy = true;
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug(getPrefix(requestId) + "Host doesnt end with .i2p and it contains a period [" + host + "]: wwwProxy!");
|
|
} else {
|
|
// what is left for here? a hostname with no dots, and != "i2p"
|
|
// and not a destination ???
|
|
// Perhaps something in privatehosts.txt ...
|
|
request = request.substring(pos + 1);
|
|
pos = request.indexOf("/");
|
|
if (pos < 0) {
|
|
l.log("Invalid request url [" + request + "]");
|
|
if (out != null) {
|
|
out.write(getErrorPage("denied", ERR_REQUEST_DENIED));
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
}
|
|
destination = request.substring(0, pos);
|
|
host = getHostName(destination);
|
|
line = method + " " + request.substring(pos);
|
|
} // end host name processing
|
|
|
|
if (port != 80 && !usingWWWProxy) {
|
|
if (out != null) {
|
|
out.write(getErrorPage("denied", ERR_REQUEST_DENIED));
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
}
|
|
|
|
boolean isValid = usingWWWProxy || usingInternalServer || isSupportedAddress(host, protocol);
|
|
if (!isValid) {
|
|
if (_log.shouldLog(Log.INFO)) _log.info(getPrefix(requestId) + "notValid(" + host + ")");
|
|
method = null;
|
|
destination = null;
|
|
break;
|
|
}
|
|
|
|
// don't do this, it forces yet another hostname lookup,
|
|
// and in all cases host was already set above
|
|
//if ((!usingWWWProxy) && (!usingInternalServer)) {
|
|
// String oldhost = host;
|
|
// host = getHostName(destination); // hide original host
|
|
// if (_log.shouldLog(Log.INFO))
|
|
// _log.info(getPrefix(requestId) + " oldhost " + oldhost + " newhost " + host + " dest " + destination);
|
|
//}
|
|
|
|
if (_log.shouldLog(Log.DEBUG)) {
|
|
_log.debug(getPrefix(requestId) + "METHOD: \"" + method + "\"");
|
|
_log.debug(getPrefix(requestId) + "PROTOC: \"" + protocol + "\"");
|
|
_log.debug(getPrefix(requestId) + "HOST : \"" + host + "\"");
|
|
_log.debug(getPrefix(requestId) + "DEST : \"" + destination + "\"");
|
|
}
|
|
|
|
// end first line processing
|
|
|
|
} else {
|
|
if (lowercaseLine.startsWith("host: ") && !usingWWWProxy) {
|
|
// Note that we only pass the original Host: line through to the outproxy
|
|
// But we don't create a Host: line if it wasn't sent to us
|
|
line = "Host: " + host;
|
|
if (_log.shouldLog(Log.INFO))
|
|
_log.info(getPrefix(requestId) + "Setting host = " + host);
|
|
} else if (lowercaseLine.startsWith("user-agent: ") &&
|
|
!Boolean.valueOf(getTunnel().getClientOptions().getProperty(PROP_USER_AGENT)).booleanValue()) {
|
|
line = null;
|
|
continue;
|
|
} else if (lowercaseLine.startsWith("accept")) {
|
|
// strip the accept-blah headers, as they vary dramatically from
|
|
// browser to browser
|
|
line = null;
|
|
continue;
|
|
} else if (lowercaseLine.startsWith("referer: ") &&
|
|
!Boolean.valueOf(getTunnel().getClientOptions().getProperty(PROP_REFERER)).booleanValue()) {
|
|
// Shouldn't we be more specific, like accepting in-site referers ?
|
|
//line = "Referer: i2p";
|
|
line = null;
|
|
continue; // completely strip the line
|
|
} else if (lowercaseLine.startsWith("via: ") &&
|
|
!Boolean.valueOf(getTunnel().getClientOptions().getProperty(PROP_VIA)).booleanValue()) {
|
|
//line = "Via: i2p";
|
|
line = null;
|
|
continue; // completely strip the line
|
|
} else if (lowercaseLine.startsWith("from: ")) {
|
|
//line = "From: i2p";
|
|
line = null;
|
|
continue; // completely strip the line
|
|
}
|
|
}
|
|
|
|
if (line.length() == 0) {
|
|
|
|
String ok = getTunnel().getClientOptions().getProperty("i2ptunnel.gzip");
|
|
boolean gzip = DEFAULT_GZIP;
|
|
if (ok != null)
|
|
gzip = Boolean.valueOf(ok).booleanValue();
|
|
if (gzip && !usingInternalServer) {
|
|
// according to rfc2616 s14.3, this *should* force identity, even if
|
|
// an explicit q=0 for gzip doesn't. tested against orion.i2p, and it
|
|
// seems to work.
|
|
newRequest.append("Accept-Encoding: \r\n");
|
|
newRequest.append("X-Accept-Encoding: x-i2p-gzip;q=1.0, identity;q=0.5, deflate;q=0, gzip;q=0, *;q=0\r\n");
|
|
}
|
|
if (!Boolean.valueOf(getTunnel().getClientOptions().getProperty(PROP_USER_AGENT)).booleanValue())
|
|
newRequest.append("User-Agent: MYOB/6.66 (AN/ON)\r\n");
|
|
newRequest.append("Connection: close\r\n\r\n");
|
|
break;
|
|
} else {
|
|
newRequest.append(line).append("\r\n"); // HTTP spec
|
|
}
|
|
} // end header processing
|
|
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug(getPrefix(requestId) + "NewRequest header: [" + newRequest.toString() + "]");
|
|
|
|
if (method == null || destination == null) {
|
|
//l.log("No HTTP method found in the request.");
|
|
if (out != null) {
|
|
if ("http://".equalsIgnoreCase(protocol))
|
|
out.write(getErrorPage("denied", ERR_REQUEST_DENIED));
|
|
else
|
|
out.write(getErrorPage("protocol", ERR_BAD_PROTOCOL));
|
|
writeFooter(out);
|
|
}
|
|
s.close();
|
|
return;
|
|
}
|
|
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug(getPrefix(requestId) + "Destination: " + destination);
|
|
|
|
// Serve local proxy files (images, css linked from error pages)
|
|
// Ignore all the headers
|
|
if (usingInternalServer) {
|
|
serveLocalFile(out, method, targetRequest);
|
|
s.close();
|
|
return;
|
|
}
|
|
|
|
// If the host is "i2p", the getHostName() lookup failed, don't try to
|
|
// look it up again as the naming service does not do negative caching
|
|
// so it will be slow.
|
|
|
|
Destination clientDest;
|
|
if ("i2p".equals(host))
|
|
clientDest = null;
|
|
else
|
|
clientDest = I2PTunnel.destFromName(destination);
|
|
|
|
if (clientDest == null) {
|
|
//l.log("Could not resolve " + destination + ".");
|
|
if (_log.shouldLog(Log.WARN))
|
|
_log.warn("Unable to resolve " + destination + " (proxy? " + usingWWWProxy + ", request: " + targetRequest);
|
|
byte[] header;
|
|
String jumpServers = null;
|
|
if (usingWWWProxy)
|
|
header = getErrorPage("dnfp", ERR_DESTINATION_UNKNOWN);
|
|
else if(ahelper != 0)
|
|
header = getErrorPage("dnfb", ERR_DESTINATION_UNKNOWN);
|
|
else if (destination.length() == 60 && destination.endsWith(".b32.i2p"))
|
|
header = getErrorPage("dnf", ERR_DESTINATION_UNKNOWN);
|
|
else {
|
|
header = getErrorPage("dnfh", ERR_DESTINATION_UNKNOWN);
|
|
jumpServers = getTunnel().getClientOptions().getProperty(PROP_JUMP_SERVERS);
|
|
if (jumpServers == null)
|
|
jumpServers = DEFAULT_JUMP_SERVERS;
|
|
}
|
|
writeErrorMessage(header, out, targetRequest, usingWWWProxy, destination, jumpServers);
|
|
s.close();
|
|
return;
|
|
}
|
|
String remoteID;
|
|
|
|
Properties opts = new Properties();
|
|
//opts.setProperty("i2p.streaming.inactivityTimeout", ""+120*1000);
|
|
// 1 == disconnect. see ConnectionOptions in the new streaming lib, which i
|
|
// dont want to hard link to here
|
|
//opts.setProperty("i2p.streaming.inactivityTimeoutAction", ""+1);
|
|
I2PSocket i2ps = createI2PSocket(clientDest, getDefaultOptions(opts));
|
|
byte[] data = newRequest.toString().getBytes("ISO-8859-1");
|
|
Runnable onTimeout = new OnTimeout(s, s.getOutputStream(), targetRequest, usingWWWProxy, currentProxy, requestId);
|
|
I2PTunnelRunner runner = new I2PTunnelHTTPClientRunner(s, i2ps, sockLock, data, mySockets, onTimeout);
|
|
} catch (SocketException ex) {
|
|
_log.info(getPrefix(requestId) + "Error trying to connect", ex);
|
|
l.log(ex.getMessage());
|
|
handleHTTPClientException(ex, out, targetRequest, usingWWWProxy, currentProxy, requestId);
|
|
closeSocket(s);
|
|
} catch (IOException ex) {
|
|
_log.info(getPrefix(requestId) + "Error trying to connect", ex);
|
|
l.log(ex.getMessage());
|
|
handleHTTPClientException(ex, out, targetRequest, usingWWWProxy, currentProxy, requestId);
|
|
closeSocket(s);
|
|
} catch (I2PException ex) {
|
|
_log.info("getPrefix(requestId) + Error trying to connect", ex);
|
|
l.log(ex.getMessage());
|
|
handleHTTPClientException(ex, out, targetRequest, usingWWWProxy, currentProxy, requestId);
|
|
closeSocket(s);
|
|
} catch (OutOfMemoryError oom) {
|
|
IOException ex = new IOException("OOM");
|
|
_log.info("getPrefix(requestId) + Error trying to connect", ex);
|
|
l.log(ex.getMessage());
|
|
handleHTTPClientException(ex, out, targetRequest, usingWWWProxy, currentProxy, requestId);
|
|
closeSocket(s);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read the first line unbuffered.
|
|
* After that, switch to a BufferedReader, unless the method is "POST".
|
|
* We can't use BufferedReader for POST because we can't have readahead,
|
|
* since we are passing the stream on to I2PTunnelRunner for the POST data.
|
|
*
|
|
*/
|
|
private static class InputReader {
|
|
BufferedReader _br;
|
|
InputStream _s;
|
|
public InputReader(InputStream s) {
|
|
_br = null;
|
|
_s = s;
|
|
}
|
|
String readLine(String method) throws IOException {
|
|
if (method == null || "POST".equals(method))
|
|
return DataHelper.readLine(_s);
|
|
if (_br == null)
|
|
_br = new BufferedReader(new InputStreamReader(_s, "ISO-8859-1"));
|
|
return _br.readLine();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return b32hash.b32.i2p, or "i2p" on lookup failure.
|
|
* Prior to 0.7.12, returned b64 key
|
|
*/
|
|
private final static String getHostName(String host) {
|
|
if (host == null) return null;
|
|
if (host.length() == 60 && host.toLowerCase().endsWith(".b32.i2p"))
|
|
return host;
|
|
try {
|
|
Destination dest = I2PTunnel.destFromName(host);
|
|
if (dest == null) return "i2p";
|
|
return Base32.encode(dest.calculateHash().getData()) + ".b32.i2p";
|
|
} catch (DataFormatException dfe) {
|
|
return "i2p";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* foo => errordir/foo-header_xx.ht for lang xx, or errordir/foo-header.ht,
|
|
* or the backup byte array on fail.
|
|
*
|
|
* .ht files must be UTF-8 encoded and use \r\n terminators so the
|
|
* HTTP headers are conformant.
|
|
* We can't use FileUtil.readFile() because it strips \r
|
|
*
|
|
* @return non-null
|
|
*/
|
|
private byte[] getErrorPage(String base, byte[] backup) {
|
|
return getErrorPage(getTunnel().getContext(), base, backup);
|
|
}
|
|
|
|
private static byte[] getErrorPage(I2PAppContext ctx, String base, byte[] backup) {
|
|
File errorDir = new File(ctx.getBaseDir(), "docs");
|
|
String lang = ctx.getProperty("routerconsole.lang", Locale.getDefault().getLanguage());
|
|
if (lang != null && lang.length() > 0 && !lang.equals("en")) {
|
|
File file = new File(errorDir, base + "-header_" + lang + ".ht");
|
|
try {
|
|
return readFile(file);
|
|
} catch (IOException ioe) {
|
|
// try the english version now
|
|
}
|
|
}
|
|
File file = new File(errorDir, base + "-header.ht");
|
|
try {
|
|
return readFile(file);
|
|
} catch (IOException ioe) {
|
|
return backup;
|
|
}
|
|
}
|
|
|
|
private static byte[] readFile(File file) throws IOException {
|
|
FileInputStream fis = null;
|
|
byte[] buf = new byte[512];
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream(2048);
|
|
try {
|
|
int len = 0;
|
|
fis = new FileInputStream(file);
|
|
while ((len = fis.read(buf)) > 0) {
|
|
baos.write(buf, 0, len);
|
|
}
|
|
return baos.toByteArray();
|
|
} finally {
|
|
try { if (fis != null) fis.close(); } catch (IOException foo) {}
|
|
}
|
|
// we won't ever get here
|
|
}
|
|
|
|
private static void writeFooter(OutputStream out) throws IOException {
|
|
// the css is hiding this div for now, but we'll keep it here anyway
|
|
out.write("<div class=\"proxyfooter\"><p><i>I2P HTTP Proxy Server<br>Generated on: ".getBytes());
|
|
out.write(new Date().toString().getBytes());
|
|
out.write("</i></div></body></html>\n".getBytes());
|
|
out.flush();
|
|
}
|
|
|
|
private static class OnTimeout implements Runnable {
|
|
private Socket _socket;
|
|
private OutputStream _out;
|
|
private String _target;
|
|
private boolean _usingProxy;
|
|
private String _wwwProxy;
|
|
private long _requestId;
|
|
public OnTimeout(Socket s, OutputStream out, String target, boolean usingProxy, String wwwProxy, long id) {
|
|
_socket = s;
|
|
_out = out;
|
|
_target = target;
|
|
_usingProxy = usingProxy;
|
|
_wwwProxy = wwwProxy;
|
|
_requestId = id;
|
|
}
|
|
public void run() {
|
|
if (_log.shouldLog(Log.DEBUG))
|
|
_log.debug("Timeout occured requesting " + _target);
|
|
handleHTTPClientException(new RuntimeException("Timeout"), _out,
|
|
_target, _usingProxy, _wwwProxy, _requestId);
|
|
closeSocket(_socket);
|
|
}
|
|
}
|
|
|
|
private static String DEFAULT_JUMP_SERVERS =
|
|
"http://i2host.i2p/cgi-bin/i2hostjump?," +
|
|
"http://stats.i2p/cgi-bin/jump.cgi?a=," +
|
|
"http://i2jump.i2p/";
|
|
|
|
/**
|
|
* @param jumpServers comma- or space-separated list, or null
|
|
*/
|
|
private static void writeErrorMessage(byte[] errMessage, OutputStream out, String targetRequest,
|
|
boolean usingWWWProxy, String wwwProxy, String jumpServers) throws IOException {
|
|
if (out != null) {
|
|
out.write(errMessage);
|
|
if (targetRequest != null) {
|
|
int protopos = targetRequest.indexOf(" ");
|
|
String uri = null;
|
|
if (protopos >= 0)
|
|
uri = targetRequest.substring(0, protopos);
|
|
else
|
|
uri = targetRequest;
|
|
out.write("<a href=\"http://".getBytes());
|
|
out.write(uri.getBytes());
|
|
out.write("\">http://".getBytes());
|
|
out.write(uri.getBytes());
|
|
out.write("</a>".getBytes());
|
|
if (usingWWWProxy) out.write(("<br>WWW proxy: " + wwwProxy).getBytes());
|
|
if (jumpServers != null && jumpServers.length() > 0) {
|
|
out.write("<br><br>".getBytes());
|
|
out.write(_("Click a link below to look for an address helper by using a \"jump\" service:").getBytes("UTF-8"));
|
|
out.write("<br>".getBytes());
|
|
|
|
StringTokenizer tok = new StringTokenizer(jumpServers, ", ");
|
|
while (tok.hasMoreTokens()) {
|
|
String jurl = tok.nextToken();
|
|
if (!jurl.startsWith("http://"))
|
|
continue;
|
|
// Skip jump servers we don't know
|
|
String jumphost = jurl.substring(7); // "http://"
|
|
jumphost = jumphost.substring(0, jumphost.indexOf('/'));
|
|
try {
|
|
Destination dest = I2PTunnel.destFromName(jumphost);
|
|
if (dest == null) continue;
|
|
} catch (DataFormatException dfe) {
|
|
continue;
|
|
}
|
|
|
|
out.write("<br><a href=\"".getBytes());
|
|
out.write(jurl.getBytes());
|
|
out.write(uri.getBytes());
|
|
out.write("\">".getBytes());
|
|
out.write(jurl.getBytes());
|
|
out.write(uri.getBytes());
|
|
out.write("</a>".getBytes());
|
|
}
|
|
}
|
|
}
|
|
out.write("</div>".getBytes());
|
|
writeFooter(out);
|
|
}
|
|
}
|
|
|
|
private static void handleHTTPClientException(Exception ex, OutputStream out, String targetRequest,
|
|
boolean usingWWWProxy, String wwwProxy, long requestId) {
|
|
|
|
// static
|
|
//if (_log.shouldLog(Log.WARN))
|
|
// _log.warn(getPrefix(requestId) + "Error sending to " + wwwProxy + " (proxy? " + usingWWWProxy + ", request: " + targetRequest, ex);
|
|
if (out != null) {
|
|
try {
|
|
byte[] header;
|
|
if (usingWWWProxy)
|
|
header = getErrorPage(I2PAppContext.getGlobalContext(), "dnfp", ERR_DESTINATION_UNKNOWN);
|
|
else
|
|
header = getErrorPage(I2PAppContext.getGlobalContext(), "dnf", ERR_DESTINATION_UNKNOWN);
|
|
writeErrorMessage(header, out, targetRequest, usingWWWProxy, wwwProxy, null);
|
|
} catch (IOException ioe) {
|
|
// static
|
|
//_log.warn(getPrefix(requestId) + "Error writing out the 'destination was unknown' " + "message", ioe);
|
|
}
|
|
} else {
|
|
// static
|
|
//_log.warn(getPrefix(requestId) + "Client disconnected before we could say that destination " + "was unknown", ex);
|
|
}
|
|
}
|
|
|
|
private final static String SUPPORTED_HOSTS[] = { "i2p", "www.i2p.com", "i2p."};
|
|
|
|
/** @param host ignored */
|
|
private static boolean isSupportedAddress(String host, String protocol) {
|
|
if ((host == null) || (protocol == null)) return false;
|
|
|
|
/****
|
|
* Let's not look up the name _again_
|
|
* and now that host is a b32, this was failing
|
|
*
|
|
boolean found = false;
|
|
String lcHost = host.toLowerCase();
|
|
for (int i = 0; i < SUPPORTED_HOSTS.length; i++) {
|
|
if (SUPPORTED_HOSTS[i].equals(lcHost)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
try {
|
|
Destination d = I2PTunnel.destFromName(host);
|
|
if (d == null) return false;
|
|
} catch (DataFormatException dfe) {
|
|
}
|
|
}
|
|
****/
|
|
return protocol.equalsIgnoreCase("http://");
|
|
}
|
|
|
|
private final static byte[] ERR_404 =
|
|
("HTTP/1.1 404 Not Found\r\n"+
|
|
"Content-Type: text/plain\r\n"+
|
|
"\r\n"+
|
|
"HTTP Proxy local file not found")
|
|
.getBytes();
|
|
|
|
/**
|
|
* Very simple web server.
|
|
*
|
|
* Serve local files in the docs/ directory, for CSS and images in
|
|
* error pages, using the reserved address proxy.i2p
|
|
* (similar to p.p in privoxy).
|
|
* This solves the problems with including links to the router console,
|
|
* as assuming the router console is at 127.0.0.1 leads to broken
|
|
* links if it isn't.
|
|
*
|
|
* Ignore all request headers (If-Modified-Since, etc.)
|
|
*
|
|
* There is basic protection here -
|
|
* FileUtil.readFile() prevents traversal above the base directory -
|
|
* but inproxy/gateway ops would be wise to block proxy.i2p to prevent
|
|
* exposing the docs/ directory or perhaps other issues through
|
|
* uncaught vulnerabilities.
|
|
* Restrict to the /themes/ directory for now.
|
|
*
|
|
* @param targetRequest "proxy.i2p/themes/foo.png HTTP/1.1"
|
|
*/
|
|
private static void serveLocalFile(OutputStream out, String method, String targetRequest) {
|
|
// a home page message for the curious...
|
|
if (targetRequest.startsWith("proxy.i2p/ ")) {
|
|
try {
|
|
out.write(("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nCache-Control: max-age=86400\r\n\r\nI2P HTTP proxy OK").getBytes());
|
|
out.flush();
|
|
} catch (IOException ioe) {}
|
|
return;
|
|
}
|
|
if ((method.equals("GET") || method.equals("HEAD")) &&
|
|
targetRequest.startsWith("proxy.i2p/themes/") &&
|
|
!targetRequest.contains("..")) {
|
|
int space = targetRequest.indexOf(' ');
|
|
String filename = null;
|
|
try {
|
|
filename = targetRequest.substring(17, space); // "proxy.i2p/themes/".length
|
|
} catch (IndexOutOfBoundsException ioobe) {}
|
|
// theme hack
|
|
if (filename.startsWith("console/default/"))
|
|
filename = filename.replaceFirst("default", I2PAppContext.getGlobalContext().getProperty("routerconsole.theme", "light"));
|
|
File themesDir = new File(_errorDir, "themes");
|
|
File file = new File(themesDir, filename);
|
|
if (file.exists() && !file.isDirectory()) {
|
|
String type;
|
|
if (filename.endsWith(".css"))
|
|
type = "text/css";
|
|
else if (filename.endsWith(".ico"))
|
|
type = "image/x-icon";
|
|
else if (filename.endsWith(".png"))
|
|
type = "image/png";
|
|
else if (filename.endsWith(".jpg"))
|
|
type = "image/jpeg";
|
|
else type = "text/html";
|
|
try {
|
|
out.write("HTTP/1.1 200 OK\r\nContent-Type: ".getBytes());
|
|
out.write(type.getBytes());
|
|
out.write("\r\nCache-Control: max-age=86400\r\n\r\n".getBytes());
|
|
FileUtil.readFile(filename, themesDir.getAbsolutePath(), out);
|
|
return;
|
|
} catch (IOException ioe) {}
|
|
}
|
|
}
|
|
try {
|
|
out.write(ERR_404);
|
|
out.flush();
|
|
} catch (IOException ioe) {}
|
|
}
|
|
|
|
|
|
private static final String BUNDLE_NAME = "net.i2p.i2ptunnel.web.messages";
|
|
|
|
/** lang in routerconsole.lang property, else current locale */
|
|
public static String _(String key) {
|
|
return Translate.getString(key, I2PAppContext.getGlobalContext(), BUNDLE_NAME);
|
|
}
|
|
|
|
/** {0} and {1} */
|
|
public static String _(String key, Object o, Object o2) {
|
|
return Translate.getString(key, o, o2, I2PAppContext.getGlobalContext(), BUNDLE_NAME);
|
|
}
|
|
|
|
}
|