1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 6370908

    27  * @summary Add support for HTTP_CONNECT proxy in Socket class

    28  */

    29 

    30 import java.io.IOException;

    31 import java.io.InputStream;

    32 import java.io.OutputStream;

    33 import java.io.PrintWriter;

    34 import static java.lang.System.out;

    35 import java.net.InetAddress;

    36 import java.net.InetSocketAddress;

    37 import java.net.Proxy;

    38 import java.net.ServerSocket;

    39 import java.net.Socket;

    40 import sun.net.www.MessageHeader;

    41 

    42 public class HttpProxy {

    43     final String proxyHost;

    44     final int proxyPort;

    45     static final int SO_TIMEOUT = 15000;

    46 

    47     public static void main(String[] args) throws Exception {

    48         String host;

    49         int port;

    50         if (args.length == 0) {

    51             // Start internal proxy

    52             ConnectProxyTunnelServer proxy = new ConnectProxyTunnelServer();

    53             proxy.start();

    54             host = "localhost";

    55             port = proxy.getLocalPort();

    56             out.println("Running with internal proxy: " + host + ":" + port);

    57         } else if (args.length == 2) {

    58             host = args[0];

    59             port = Integer.valueOf(args[1]);

    60             out.println("Running against specified proxy server: " + host + ":" + port);

    61         } else {

    62             System.err.println("Usage: java HttpProxy [<proxy host> <proxy port>]");

    63             return;

    64         }

    65 

    66         HttpProxy p = new HttpProxy(host, port);

    67         p.test();

    68     }

    69 

    70     public HttpProxy(String proxyHost, int proxyPort) {

    71         this.proxyHost = proxyHost;

    72         this.proxyPort = proxyPort;

    73     }

    74 

    75     void test() throws Exception {

    76         InetSocketAddress proxyAddress = new InetSocketAddress(proxyHost, proxyPort);

    77         Proxy httpProxy = new Proxy(Proxy.Type.HTTP, proxyAddress);

    78 

    79         try (ServerSocket ss = new ServerSocket(0);

    80              Socket sock = new Socket(httpProxy)) {

    81             sock.setSoTimeout(SO_TIMEOUT);

    82             sock.setTcpNoDelay(false);

    83 

    84             InetSocketAddress externalAddress =

    85                 new InetSocketAddress(InetAddress.getLocalHost(), ss.getLocalPort());

    86 

    87             out.println("Trying to connect to server socket on " + externalAddress);

    88             sock.connect(externalAddress);

    89             try (Socket externalSock = ss.accept()) {

    90                 // perform some simple checks

    91                 check(sock.isBound(), "Socket is not bound");

    92                 check(sock.isConnected(), "Socket is not connected");

    93                 check(!sock.isClosed(), "Socket should not be closed");

    94                 check(sock.getSoTimeout() == SO_TIMEOUT,

    95                         "Socket should have a previously set timeout");

    96                 check(sock.getTcpNoDelay() ==  false, "NODELAY should be false");

    97 

    98                 simpleDataExchange(sock, externalSock);

    99             }

   100         }

   101     }

   102 

   103     static void check(boolean condition, String message) {

   104         if (!condition) out.println(message);

   105     }

   106 

   107     static Exception unexpected(Exception e) {

   108         out.println("Unexcepted Exception: " + e);

   109         e.printStackTrace();

   110         return e;

   111     }

   112 

   113     // performs a simple exchange of data between the two sockets

   114     // and throws an exception if there is any problem.

   115     void simpleDataExchange(Socket s1, Socket s2) throws Exception {

   116         try (final InputStream i1 = s1.getInputStream();

   117              final InputStream i2 = s2.getInputStream();

   118              final OutputStream o1 = s1.getOutputStream();

   119              final OutputStream o2 = s2.getOutputStream()) {

   120             startSimpleWriter("simpleWriter1", o1, 100);

   121             startSimpleWriter("simpleWriter2", o2, 200);

   122             simpleRead(i2, 100);

   123             simpleRead(i1, 200);

   124         }

   125     }

   126 

   127     void startSimpleWriter(String threadName, final OutputStream os, final int start) {

   128         (new Thread(new Runnable() {

   129             public void run() {

   130                 try { simpleWrite(os, start); }

   131                 catch (Exception e) {unexpected(e); }

   132             }}, threadName)).start();

   133     }

   134 

   135     void simpleWrite(OutputStream os, int start) throws Exception {

   136         byte b[] = new byte[2];

   137         for (int i=start; i<start+100; i++) {

   138             b[0] = (byte) (i / 256);

   139             b[1] = (byte) (i % 256);

   140             os.write(b);

   141         }

   142     }

   143 

   144     void simpleRead(InputStream is, int start) throws Exception {

   145         byte b[] = new byte [2];

   146         for (int i=start; i<start+100; i++) {

   147             int x = is.read(b);

   148             if (x == 1)

   149                 x += is.read(b,1,1);

   150             if (x!=2)

   151                 throw new Exception("read error");

   152             int r = bytes(b[0], b[1]);

   153             if (r != i)

   154                 throw new Exception("read " + r + " expected " +i);

   155         }

   156     }

   157 

   158     int bytes(byte b1, byte b2) {

   159         int i1 = (int)b1 & 0xFF;

   160         int i2 = (int)b2 & 0xFF;

   161         return i1 * 256 + i2;

   162     }

   163 

   164     static class ConnectProxyTunnelServer extends Thread {

   165 

   166         private final ServerSocket ss;

   167 

   168         public ConnectProxyTunnelServer() throws IOException {

   169             ss = new ServerSocket(0);

   170         }

   171 

   172         @Override

   173         public void run() {

   174             try (Socket clientSocket = ss.accept()) {

   175                 processRequest(clientSocket);

   176             } catch (Exception e) {

   177                 out.println("Proxy Failed: " + e);

   178                 e.printStackTrace();

   179             } finally {

   180                 try { ss.close(); } catch (IOException x) { unexpected(x); }

   181             }

   182         }

   183 

   184         /**

   185          * Returns the port on which the proxy is accepting connections.

   186          */

   187         public int getLocalPort() {

   188             return ss.getLocalPort();

   189         }

   190 

   191         /*

   192          * Processes the CONNECT request

   193          */

   194         private void processRequest(Socket clientSocket) throws Exception {

   195             MessageHeader mheader = new MessageHeader(clientSocket.getInputStream());

   196             String statusLine = mheader.getValue(0);

   197 

   198             if (!statusLine.startsWith("CONNECT")) {

   199                 out.println("proxy server: processes only "

   200                                   + "CONNECT method requests, recieved: "

   201                                   + statusLine);

   202                 return;

   203             }

   204 

   205             // retrieve the host and port info from the status-line

   206             InetSocketAddress serverAddr = getConnectInfo(statusLine);

   207 

   208             //open socket to the server

   209             try (Socket serverSocket = new Socket(serverAddr.getAddress(),

   210                                                   serverAddr.getPort())) {

   211                 Forwarder clientFW = new Forwarder(clientSocket.getInputStream(),

   212                                                    serverSocket.getOutputStream());

   213                 Thread clientForwarderThread = new Thread(clientFW, "ClientForwarder");

   214                 clientForwarderThread.start();

   215                 send200(clientSocket);

   216                 Forwarder serverFW = new Forwarder(serverSocket.getInputStream(),

   217                                                    clientSocket.getOutputStream());

   218                 serverFW.run();

   219                 clientForwarderThread.join();

   220             }

   221         }

   222 

   223         private void send200(Socket clientSocket) throws IOException {

   224             OutputStream out = clientSocket.getOutputStream();

   225             PrintWriter pout = new PrintWriter(out);

   226 

   227             pout.println("HTTP/1.1 200 OK");

   228             pout.println();

   229             pout.flush();

   230         }

   231 

   232         /*

   233          * This method retrieves the hostname and port of the tunnel destination

   234          * from the request line.

   235          * @param connectStr

   236          *        of the form: <i>CONNECT server-name:server-port HTTP/1.x</i>

   237          */

   238         static InetSocketAddress getConnectInfo(String connectStr)

   239             throws Exception

   240         {

   241             try {

   242                 int starti = connectStr.indexOf(' ');

   243                 int endi = connectStr.lastIndexOf(' ');

   244                 String connectInfo = connectStr.substring(starti+1, endi).trim();

   245                 // retrieve server name and port

   246                 endi = connectInfo.indexOf(':');

   247                 String name = connectInfo.substring(0, endi);

   248                 int port = Integer.parseInt(connectInfo.substring(endi+1));

   249                 return new InetSocketAddress(name, port);

   250             } catch (Exception e) {

   251                 out.println("Proxy recieved a request: " + connectStr);

   252                 throw unexpected(e);

   253             }

   254         }

   255     }

   256 

   257     /* Reads from the given InputStream and writes to the given OutputStream */

   258     static class Forwarder implements Runnable

   259     {

   260         private final InputStream in;

   261         private final OutputStream os;

   262 

   263         Forwarder(InputStream in, OutputStream os) {

   264             this.in = in;

   265             this.os = os;

   266         }

   267 

   268         @Override

   269         public void run() {

   270             try {

   271                 byte[] ba = new byte[1024];

   272                 int count;

   273                 while ((count = in.read(ba)) != -1) {

   274                     os.write(ba, 0, count);

   275                 }

   276             } catch (IOException e) {

   277                 unexpected(e);

   278             }

   279         }

   280     }

   281 }