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.BodyHandlers.discarding;
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 if (debug.on()) debug.log("Connecting plain connection");
65 return delegate.connectAsync()
66 .thenCompose((Void v) -> {
67 if (debug.on()) debug.log("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, discarding(), 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 if (debug.on()) debug.log("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 boolean isSecure() {
141 return false;
142 }
143
144 @Override
145 boolean isProxied() {
146 return true;
147 }
148
149 }