1 /*

     2  * Copyright (c) 2015, 2018, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 package jdk.internal.net.http;

    27 

    28 import java.io.IOException;

    29 import java.lang.System.Logger.Level;

    30 import java.net.InetSocketAddress;

    31 import java.nio.ByteBuffer;

    32 import java.nio.channels.SocketChannel;

    33 import java.util.concurrent.CompletableFuture;

    34 import java.util.function.Function;

    35 import java.net.http.HttpHeaders;

    36 import jdk.internal.net.http.common.FlowTube;

    37 import jdk.internal.net.http.common.MinimalFuture;

    38 import static java.net.http.HttpResponse.BodyHandler.discard;

    39 

    40 /**

    41  * A plain text socket tunnel through a proxy. Uses "CONNECT" but does not

    42  * encrypt. Used by WebSocket, as well as HTTP over SSL + Proxy.

    43  * Wrapped in SSLTunnelConnection or AsyncSSLTunnelConnection for encryption.

    44  */

    45 final class PlainTunnelingConnection extends HttpConnection {

    46 

    47     final PlainHttpConnection delegate;

    48     final HttpHeaders proxyHeaders;

    49     final InetSocketAddress proxyAddr;

    50     private volatile boolean connected;

    51 

    52     protected PlainTunnelingConnection(InetSocketAddress addr,

    53                                        InetSocketAddress proxy,

    54                                        HttpClientImpl client,

    55                                        HttpHeaders proxyHeaders) {

    56         super(addr, client);

    57         this.proxyAddr = proxy;

    58         this.proxyHeaders = proxyHeaders;

    59         delegate = new PlainHttpConnection(proxy, client);

    60     }

    61 

    62     @Override

    63     public CompletableFuture<Void> connectAsync() {

    64         debug.log(Level.DEBUG, "Connecting plain connection");

    65         return delegate.connectAsync()

    66             .thenCompose((Void v) -> {

    67                 debug.log(Level.DEBUG, "sending HTTP/1.1 CONNECT");

    68                 HttpClientImpl client = client();

    69                 assert client != null;

    70                 HttpRequestImpl req = new HttpRequestImpl("CONNECT", address, proxyHeaders);

    71                 MultiExchange<Void> mulEx = new MultiExchange<>(null, req,

    72                         client, discard(), null, null);

    73                 Exchange<Void> connectExchange = new Exchange<>(req, mulEx);

    74 

    75                 return connectExchange

    76                         .responseAsyncImpl(delegate)

    77                         .thenCompose((Response resp) -> {

    78                             CompletableFuture<Void> cf = new MinimalFuture<>();

    79                             debug.log(Level.DEBUG, "got response: %d", resp.statusCode());

    80                             if (resp.statusCode() == 407) {

    81                                 return connectExchange.ignoreBody().handle((r,t) -> {

    82                                     // close delegate after reading body: we won't

    83                                     // be reusing that connection anyway.

    84                                     delegate.close();

    85                                     ProxyAuthenticationRequired authenticationRequired =

    86                                             new ProxyAuthenticationRequired(resp);

    87                                     cf.completeExceptionally(authenticationRequired);

    88                                     return cf;

    89                                 }).thenCompose(Function.identity());

    90                             } else if (resp.statusCode() != 200) {

    91                                 delegate.close();

    92                                 cf.completeExceptionally(new IOException(

    93                                         "Tunnel failed, got: "+ resp.statusCode()));

    94                             } else {

    95                                 // get the initial/remaining bytes

    96                                 ByteBuffer b = ((Http1Exchange<?>)connectExchange.exchImpl).drainLeftOverBytes();

    97                                 int remaining = b.remaining();

    98                                 assert remaining == 0: "Unexpected remaining: " + remaining;

    99                                 connected = true;

   100                                 cf.complete(null);

   101                             }

   102                             return cf;

   103                         });

   104             });

   105     }

   106 

   107     @Override

   108     boolean isTunnel() { return true; }

   109 

   110     @Override

   111     HttpPublisher publisher() { return delegate.publisher(); }

   112 

   113     @Override

   114     boolean connected() {

   115         return connected;

   116     }

   117 

   118     @Override

   119     SocketChannel channel() {

   120         return delegate.channel();

   121     }

   122 

   123     @Override

   124     FlowTube getConnectionFlow() {

   125         return delegate.getConnectionFlow();

   126     }

   127 

   128     @Override

   129     ConnectionPool.CacheKey cacheKey() {

   130         return new ConnectionPool.CacheKey(null, proxyAddr);

   131     }

   132 

   133     @Override

   134     public void close() {

   135         delegate.close();

   136         connected = false;

   137     }

   138 

   139     @Override

   140     void shutdownInput() throws IOException {

   141         delegate.shutdownInput();

   142     }

   143 

   144     @Override

   145     void shutdownOutput() throws IOException {

   146         delegate.shutdownOutput();

   147     }

   148 

   149     @Override

   150     boolean isSecure() {

   151         return false;

   152     }

   153 

   154     @Override

   155     boolean isProxied() {

   156         return true;

   157     }

   158 

   159     // Support for WebSocket/RawChannelImpl which unfortunately

   160     // still depends on synchronous read/writes.

   161     // It should be removed when RawChannelImpl moves to using asynchronous APIs.

   162     @Override

   163     DetachedConnectionChannel detachChannel() {

   164         return delegate.detachChannel();

   165     }

   166 }