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.net.InetSocketAddress; 30 import java.net.http.HttpTimeoutException; 31 import java.nio.ByteBuffer; 32 import java.nio.channels.SocketChannel; 33 import java.time.Duration; 34 import java.util.concurrent.CompletableFuture; 35 import java.util.concurrent.CompletionException; 36 import java.util.function.Function; 37 import java.net.http.HttpHeaders; 38 import jdk.internal.net.http.common.FlowTube; 39 import jdk.internal.net.http.common.MinimalFuture; 40 import static java.net.http.HttpResponse.BodyHandlers.discarding; 41 42 /** 43 * A plain text socket tunnel through a proxy. Uses "CONNECT" but does not 44 * encrypt. Used by WebSocket, as well as HTTP over SSL + Proxy. 45 * Wrapped in SSLTunnelConnection or AsyncSSLTunnelConnection for encryption. 46 */ 47 final class PlainTunnelingConnection extends HttpConnection { 48 49 final PlainHttpConnection delegate; 50 final HttpHeaders proxyHeaders; 51 final InetSocketAddress proxyAddr; 52 private volatile boolean connected; 53 PlainTunnelingConnection(InetSocketAddress addr, InetSocketAddress proxy, HttpClientImpl client, HttpHeaders proxyHeaders)54 protected PlainTunnelingConnection(InetSocketAddress addr, 55 InetSocketAddress proxy, 56 HttpClientImpl client, 57 HttpHeaders proxyHeaders) { 58 super(addr, client); 59 this.proxyAddr = proxy; 60 this.proxyHeaders = proxyHeaders; 61 delegate = new PlainHttpConnection(proxy, client); 62 } 63 64 @Override connectAsync(Exchange<?> exchange)65 public CompletableFuture<Void> connectAsync(Exchange<?> exchange) { 66 if (debug.on()) debug.log("Connecting plain connection"); 67 return delegate.connectAsync(exchange) 68 .thenCompose(unused -> delegate.finishConnect()) 69 .thenCompose((Void v) -> { 70 if (debug.on()) debug.log("sending HTTP/1.1 CONNECT"); 71 HttpClientImpl client = client(); 72 assert client != null; 73 HttpRequestImpl req = new HttpRequestImpl("CONNECT", address, proxyHeaders); 74 MultiExchange<Void> mulEx = new MultiExchange<>(null, req, 75 client, discarding(), null, null); 76 Exchange<Void> connectExchange = mulEx.getExchange(); 77 78 return connectExchange 79 .responseAsyncImpl(delegate) 80 .thenCompose((Response resp) -> { 81 CompletableFuture<Void> cf = new MinimalFuture<>(); 82 if (debug.on()) debug.log("got response: %d", resp.statusCode()); 83 if (resp.statusCode() == 407) { 84 return connectExchange.ignoreBody().handle((r,t) -> { 85 // close delegate after reading body: we won't 86 // be reusing that connection anyway. 87 delegate.close(); 88 ProxyAuthenticationRequired authenticationRequired = 89 new ProxyAuthenticationRequired(resp); 90 cf.completeExceptionally(authenticationRequired); 91 return cf; 92 }).thenCompose(Function.identity()); 93 } else if (resp.statusCode() != 200) { 94 delegate.close(); 95 cf.completeExceptionally(new IOException( 96 "Tunnel failed, got: "+ resp.statusCode())); 97 } else { 98 // get the initial/remaining bytes 99 ByteBuffer b = ((Http1Exchange<?>)connectExchange.exchImpl).drainLeftOverBytes(); 100 int remaining = b.remaining(); 101 assert remaining == 0: "Unexpected remaining: " + remaining; 102 cf.complete(null); 103 } 104 return cf; 105 }) 106 .handle((result, ex) -> { 107 if (ex == null) { 108 return MinimalFuture.completedFuture(result); 109 } else { 110 if (debug.on()) 111 debug.log("tunnel failed with \"%s\"", ex.toString()); 112 Throwable t = ex; 113 if (t instanceof CompletionException) 114 t = t.getCause(); 115 if (t instanceof HttpTimeoutException) { 116 String msg = "proxy tunneling CONNECT request timed out"; 117 t = new HttpTimeoutException(msg); 118 t.initCause(ex); 119 } 120 return MinimalFuture.<Void>failedFuture(t); 121 } 122 }) 123 .thenCompose(Function.identity()); 124 }); 125 } 126 127 public CompletableFuture<Void> finishConnect() { 128 connected = true; 129 return MinimalFuture.completedFuture(null); 130 } 131 132 @Override 133 boolean isTunnel() { return true; } 134 135 @Override 136 HttpPublisher publisher() { return delegate.publisher(); } 137 138 @Override 139 boolean connected() { 140 return connected; 141 } 142 143 @Override 144 SocketChannel channel() { 145 return delegate.channel(); 146 } 147 148 @Override 149 FlowTube getConnectionFlow() { 150 return delegate.getConnectionFlow(); 151 } 152 153 @Override 154 ConnectionPool.CacheKey cacheKey() { 155 return new ConnectionPool.CacheKey(null, proxyAddr); 156 } 157 158 @Override 159 public void close() { 160 delegate.close(); 161 connected = false; 162 } 163 164 @Override 165 boolean isSecure() { 166 return false; 167 } 168 169 @Override 170 boolean isProxied() { 171 return true; 172 } 173 174 } 175