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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 2005, 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 | package sun.rmi.transport.proxy; | ||
| 26 | |||
| 27 | import java.io.BufferedInputStream; | ||
| 28 | import java.io.IOException; | ||
| 29 | import java.net.ServerSocket; | ||
| 30 | import java.net.Socket; | ||
| 31 | import sun.rmi.runtime.Log; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * The HttpAwareServerSocket class extends the java.net.ServerSocket | ||
| 35 | * class. It behaves like a ServerSocket, except that if | ||
| 36 | * the first four bytes of an accepted socket are the letters "POST", | ||
| 37 | * then it returns an HttpReceiveSocket instead of a java.net.Socket. | ||
| 38 | * This means that the accept method blocks until four bytes have been | ||
| 39 | * read from the new socket's input stream. | ||
| 40 | */ | ||
| 41 | class HttpAwareServerSocket extends ServerSocket { | ||
| 42 | |||
| 43 | /** | ||
| 44 | * Create a server socket on a specified port. | ||
| 45 | * @param port the port | ||
| 46 | * @exception IOException IO error when opening the socket. | ||
| 47 | */ | ||
| 48 | public HttpAwareServerSocket(int port) throws IOException | ||
| 49 | { | ||
| 50 | super(port); | ||
| 51 | } | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Create a server socket, bind it to the specified local port | ||
| 55 | * and listen to it. You can connect to an annonymous port by | ||
| 56 | * specifying the port number to be 0. <i>backlog</i> specifies | ||
| 57 | * how many connection requests the system will queue up while waiting | ||
| 58 | * for the ServerSocket to execute accept(). | ||
| 59 | * @param port the specified port | ||
| 60 | * @param backlog the number of queued connect requests pending accept | ||
| 61 | */ | ||
| 62 | public HttpAwareServerSocket(int port, int backlog) throws IOException | ||
| 63 | { | ||
| 64 | super(port, backlog); | ||
| 65 | } | ||
| 66 | |||
| 67 | /** | ||
| 68 | * Accept a connection. This method will block until the connection | ||
| 69 | * is made and four bytes can be read from the input stream. | ||
| 70 | * If the first four bytes are "POST", then an HttpReceiveSocket is | ||
| 71 | * returned, which will handle the HTTP protocol wrapping. | ||
| 72 | * Otherwise, a WrappedSocket is returned. The input stream will be | ||
| 73 | * reset to the beginning of the transmission. | ||
| 74 | * In either case, a BufferedInputStream will already be on top of | ||
| 75 | * the underlying socket's input stream. | ||
| 76 | * @exception IOException IO error when waiting for the connection. | ||
| 77 | */ | ||
| 78 | public Socket accept() throws IOException | ||
| 79 | { | ||
| 80 | Socket socket = super.accept(); | ||
| 81 | BufferedInputStream in = | ||
| 82 | new BufferedInputStream(socket.getInputStream()); | ||
| 83 | |||
| 84 | RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, | ||
| 85 | "socket accepted (checking for POST)"); | ||
| 86 | |||
| 87 | in.mark(4); | ||
| 88 | boolean isHttp = (in.read() == 'P') && | ||
| 89 | (in.read() == 'O') && | ||
| 90 | (in.read() == 'S') && | ||
| 91 | (in.read() == 'T'); | ||
| 92 | in.reset(); | ||
| 93 | |||
| 94 | if (RMIMasterSocketFactory.proxyLog.isLoggable(Log.BRIEF)) { | ||
| 95 | RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, | ||
| 96 | (isHttp ? "POST found, HTTP socket returned" : | ||
| 97 | "POST not found, direct socket returned")); | ||
| 98 | } | ||
| 99 | |||
| 100 | if (isHttp) | ||
| 101 | return new HttpReceiveSocket(socket, in, null); | ||
| 102 | else | ||
| 103 | return new WrappedSocket(socket, in, null); | ||
| 104 | } | ||
| 105 | |||
| 106 | /** | ||
| 107 | * Return the implementation address and implementation port of | ||
| 108 | * the HttpAwareServerSocket as a String. | ||
| 109 | */ | ||
| 110 | public String toString() | ||
| 111 | { | ||
| 112 | return "HttpAware" + super.toString(); | ||
| 113 | } | ||
| 114 | } | ||