1 /*
2 * Copyright (c) 2010, 2019, 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 8220663
27 * @summary Add support for HTTP_CONNECT proxy in Socket class
28 * @modules java.base/sun.net.www
29 * @run main HttpProxy
30 * @run main/othervm -Djava.net.preferIPv4Stack=true HttpProxy
31 * @run main/othervm -Djava.net.preferIPv6Addresses=true HttpProxy
32 */
33
34 import java.io.IOException;
35 import java.io.InputStream;
36 import java.io.OutputStream;
37 import java.io.PrintWriter;
38 import static java.lang.System.out;
39 import java.net.InetAddress;
40 import java.net.InetSocketAddress;
41 import java.net.Proxy;
42 import java.net.ServerSocket;
43 import java.net.Socket;
44 import java.net.SocketAddress;
45 import java.util.ArrayList;
46 import java.util.List;
47 import sun.net.www.MessageHeader;
48
49 public class HttpProxy {
50 final String proxyHost;
51 final int proxyPort;
52 static final int SO_TIMEOUT = 15000;
53
54 public static void main(String[] args) throws Exception {
55 String host;
56 int port;
57 ConnectProxyTunnelServer proxy = null;
58 if (args.length == 0) {
59 // Start internal proxy
60 proxy = new ConnectProxyTunnelServer();
61 proxy.start();
62 host = "localhost";
63 port = proxy.getLocalPort();
64 out.println("Running with internal proxy: " + host + ":" + port);
65 } else if (args.length == 2) {
66 host = args[0];
67 port = Integer.valueOf(args[1]);
68 out.println("Running against specified proxy server: " + host + ":" + port);
69 } else {
70 System.err.println("Usage: java HttpProxy [<proxy host> <proxy port>]");
71 return;
72 }
73
74 try {
75 HttpProxy p = new HttpProxy(host, port);
76 p.test();
77 } finally {
78 if (proxy != null)
79 proxy.close();
80 }
81 }
82
83 public HttpProxy(String proxyHost, int proxyPort) {
84 this.proxyHost = proxyHost;
85 this.proxyPort = proxyPort;
86 }
87
88 void test() throws Exception {
89 InetSocketAddress proxyAddress = new InetSocketAddress(proxyHost, proxyPort);
90 Proxy httpProxy = new Proxy(Proxy.Type.HTTP, proxyAddress);
91
92 try (ServerSocket ss = new ServerSocket(0)) {
93 List<InetSocketAddress> externalAddresses = new ArrayList<>();
94 externalAddresses.add(
95 new InetSocketAddress(InetAddress.getLocalHost(), ss.getLocalPort()));
96
97 if (!"true".equals(System.getProperty("java.net.preferIPv4Stack"))) {
98 byte[] bytes = new byte[] {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
99 var address = InetAddress.getByAddress(bytes);
100 externalAddresses.add(
101 new InetSocketAddress(address, ss.getLocalPort()));
102 }
103
104 for (SocketAddress externalAddress : externalAddresses) {
105 try (Socket sock = new Socket(httpProxy)) {
106 sock.setSoTimeout(SO_TIMEOUT);
107 sock.setTcpNoDelay(false);
108
109 out.println("Trying to connect to server socket on " + externalAddress);
110 sock.connect(externalAddress);
111 try (Socket externalSock = ss.accept()) {
112 // perform some simple checks
113 check(sock.isBound(), "Socket is not bound");
114 check(sock.isConnected(), "Socket is not connected");
115 check(!sock.isClosed(), "Socket should not be closed");
116 check(sock.getSoTimeout() == SO_TIMEOUT,
117 "Socket should have a previously set timeout");
118 check(sock.getTcpNoDelay() == false, "NODELAY should be false");
119
120 simpleDataExchange(sock, externalSock);
121 }
122 }
123 }
124 }
125 }
126
127 static void check(boolean condition, String message) {
128 if (!condition) out.println(message);
129 }
130
131 static Exception unexpected(Exception e) {
132 out.println("Unexpected Exception: " + e);
133 e.printStackTrace();
134 return e;
135 }
136
137 // performs a simple exchange of data between the two sockets
138 // and throws an exception if there is any problem.
139 void simpleDataExchange(Socket s1, Socket s2) throws Exception {
140 try (final InputStream i1 = s1.getInputStream();
141 final InputStream i2 = s2.getInputStream();
142 final OutputStream o1 = s1.getOutputStream();
143 final OutputStream o2 = s2.getOutputStream()) {
144 startSimpleWriter("simpleWriter1", o1, 100);
145 startSimpleWriter("simpleWriter2", o2, 200);
146 simpleRead(i2, 100);
147 simpleRead(i1, 200);
148 }
149 }
150
151 void startSimpleWriter(String threadName, final OutputStream os, final int start) {
152 (new Thread(new Runnable() {
153 public void run() {
154 try { simpleWrite(os, start); }
155 catch (Exception e) {unexpected(e); }
156 }}, threadName)).start();
157 }
158
159 void simpleWrite(OutputStream os, int start) throws Exception {
160 byte b[] = new byte[2];
161 for (int i=start; i<start+100; i++) {
162 b[0] = (byte) (i / 256);
163 b[1] = (byte) (i % 256);
164 os.write(b);
165 }
166 }
167
168 void simpleRead(InputStream is, int start) throws Exception {
169 byte b[] = new byte [2];
170 for (int i=start; i<start+100; i++) {
171 int x = is.read(b);
172 if (x == 1)
173 x += is.read(b,1,1);
174 if (x!=2)
175 throw new Exception("read error");
176 int r = bytes(b[0], b[1]);
177 if (r != i)
178 throw new Exception("read " + r + " expected " +i);
179 }
180 }
181
182 int bytes(byte b1, byte b2) {
183 int i1 = (int)b1 & 0xFF;
184 int i2 = (int)b2 & 0xFF;
185 return i1 * 256 + i2;
186 }
187
188 static class ConnectProxyTunnelServer extends Thread implements AutoCloseable {
189
190 private final ServerSocket ss;
191 private volatile boolean closed;
192
193 public ConnectProxyTunnelServer() throws IOException {
194 ss = new ServerSocket(0);
195 }
196
197 @Override
198 public void run() {
199 try {
200 while (!closed) {
201 try (Socket clientSocket = ss.accept()) {
202 processRequest(clientSocket);
203 }
204 }
205 } catch (Exception e) {
206 if (!closed) {
207 out.println("Proxy Failed: " + e);
208 e.printStackTrace();
209 }
210 } finally {
211 if (!closed)
212 try { ss.close(); } catch (IOException x) { unexpected(x); }
213 }
214 }
215
216 /**
217 * Returns the port on which the proxy is accepting connections.
218 */
219 public int getLocalPort() {
220 return ss.getLocalPort();
221 }
222
223 @Override
224 public void close() throws Exception {
225 closed = true;
226 ss.close();
227 }
228
229 /*
230 * Processes the CONNECT request
231 */
232 private void processRequest(Socket clientSocket) throws Exception {
233 MessageHeader mheader = new MessageHeader(clientSocket.getInputStream());
234 String statusLine = mheader.getValue(0);
235
236 if (!statusLine.startsWith("CONNECT")) {
237 out.println("proxy server: processes only "
238 + "CONNECT method requests, received: "
239 + statusLine);
240 return;
241 }
242
243 // retrieve the host and port info from the status-line
244 InetSocketAddress serverAddr = getConnectInfo(statusLine);
245
246 //open socket to the server
247 try (Socket serverSocket = new Socket(serverAddr.getAddress(),
248 serverAddr.getPort())) {
249 Forwarder clientFW = new Forwarder(clientSocket.getInputStream(),
250 serverSocket.getOutputStream());
251 Thread clientForwarderThread = new Thread(clientFW, "ClientForwarder");
252 clientForwarderThread.start();
253 send200(clientSocket);
254 Forwarder serverFW = new Forwarder(serverSocket.getInputStream(),
255 clientSocket.getOutputStream());
256 serverFW.run();
257 clientForwarderThread.join();
258 }
259 }
260
261 private void send200(Socket clientSocket) throws IOException {
262 OutputStream out = clientSocket.getOutputStream();
263 PrintWriter pout = new PrintWriter(out);
264
265 pout.println("HTTP/1.1 200 OK");
266 pout.println();
267 pout.flush();
268 }
269
270 /*
271 * This method retrieves the hostname and port of the tunnel destination
272 * from the request line.
273 * @param connectStr
274 * of the form: <i>CONNECT server-name:server-port HTTP/1.x</i>
275 */
276 static InetSocketAddress getConnectInfo(String connectStr)
277 throws Exception
278 {
279 try {
280 int starti = connectStr.indexOf(' ');
281 int endi = connectStr.lastIndexOf(' ');
282 String connectInfo = connectStr.substring(starti+1, endi).trim();
283 // retrieve server name and port
284 endi = connectInfo.lastIndexOf(':');
285 String name = connectInfo.substring(0, endi);
286 if (name.startsWith("[")) {
287 assert name.endsWith("]") : "name:" + name;
288 assert name.contains(":") : "name:" + name;
289 name = name.substring(1, name.length() - 1);
290 }
291 int port = Integer.parseInt(connectInfo.substring(endi+1));
292 return new InetSocketAddress(name, port);
293 } catch (Exception e) {
294 out.println("Proxy received a request: " + connectStr);
295 throw unexpected(e);
296 }
297 }
298 }
299
300 /* Reads from the given InputStream and writes to the given OutputStream */
301 static class Forwarder implements Runnable
302 {
303 private final InputStream in;
304 private final OutputStream os;
305
306 Forwarder(InputStream in, OutputStream os) {
307 this.in = in;
308 this.os = os;
309 }
310
311 @Override
312 public void run() {
313 try {
314 byte[] ba = new byte[1024];
315 int count;
316 while ((count = in.read(ba)) != -1) {
317 os.write(ba, 0, count);
318 }
319 } catch (IOException e) {
320 unexpected(e);
321 }
322 }
323 }
324 }