| /* |
| * Copyright (c) 1996, 2005, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package sun.rmi.transport.proxy; |
| |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import sun.rmi.runtime.Log; |
| |
| /** |
| * The HttpAwareServerSocket class extends the java.net.ServerSocket |
| * class. It behaves like a ServerSocket, except that if |
| * the first four bytes of an accepted socket are the letters "POST", |
| * then it returns an HttpReceiveSocket instead of a java.net.Socket. |
| * This means that the accept method blocks until four bytes have been |
| * read from the new socket's input stream. |
| */ |
| class HttpAwareServerSocket extends ServerSocket { |
| |
| /** |
| * Create a server socket on a specified port. |
| * @param port the port |
| * @exception IOException IO error when opening the socket. |
| */ |
| public HttpAwareServerSocket(int port) throws IOException |
| { |
| super(port); |
| } |
| |
| /** |
| * Create a server socket, bind it to the specified local port |
| * and listen to it. You can connect to an annonymous port by |
| * specifying the port number to be 0. <i>backlog</i> specifies |
| * how many connection requests the system will queue up while waiting |
| * for the ServerSocket to execute accept(). |
| * @param port the specified port |
| * @param backlog the number of queued connect requests pending accept |
| */ |
| public HttpAwareServerSocket(int port, int backlog) throws IOException |
| { |
| super(port, backlog); |
| } |
| |
| /** |
| * Accept a connection. This method will block until the connection |
| * is made and four bytes can be read from the input stream. |
| * If the first four bytes are "POST", then an HttpReceiveSocket is |
| * returned, which will handle the HTTP protocol wrapping. |
| * Otherwise, a WrappedSocket is returned. The input stream will be |
| * reset to the beginning of the transmission. |
| * In either case, a BufferedInputStream will already be on top of |
| * the underlying socket's input stream. |
| * @exception IOException IO error when waiting for the connection. |
| */ |
| public Socket accept() throws IOException |
| { |
| Socket socket = super.accept(); |
| BufferedInputStream in = |
| new BufferedInputStream(socket.getInputStream()); |
| |
| RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, |
| "socket accepted (checking for POST)"); |
| |
| in.mark(4); |
| boolean isHttp = (in.read() == 'P') && |
| (in.read() == 'O') && |
| (in.read() == 'S') && |
| (in.read() == 'T'); |
| in.reset(); |
| |
| if (RMIMasterSocketFactory.proxyLog.isLoggable(Log.BRIEF)) { |
| RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, |
| (isHttp ? "POST found, HTTP socket returned" : |
| "POST not found, direct socket returned")); |
| } |
| |
| if (isHttp) |
| return new HttpReceiveSocket(socket, in, null); |
| else |
| return new WrappedSocket(socket, in, null); |
| } |
| |
| /** |
| * Return the implementation address and implementation port of |
| * the HttpAwareServerSocket as a String. |
| */ |
| public String toString() |
| { |
| return "HttpAware" + super.toString(); |
| } |
| } |