| /* |
| * Copyright (c) 1996, 2008, 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.*; |
| import java.net.*; |
| |
| import sun.rmi.runtime.Log; |
| |
| /** |
| * The HttpSendSocket class extends the java.net.Socket class |
| * by enclosing the data output stream in, then extracting the input |
| * stream from, an HTTP protocol transmission. |
| * |
| * NOTES: |
| * |
| * Since the length of the output request must be known before the |
| * HTTP header can be completed, all of the output is buffered by |
| * an HttpOutputStream object until either an attempt is made to |
| * read from this socket, or the socket is explicitly closed. |
| * |
| * On the first read attempt to read from this socket, the buffered |
| * output is sent to the destination as the body of an HTTP POST |
| * request. All reads will then acquire data from the body of |
| * the response. A subsequent attempt to write to this socket will |
| * throw an IOException. |
| */ |
| class HttpSendSocket extends Socket implements RMISocketInfo { |
| |
| /** the host to connect to */ |
| protected String host; |
| |
| /** the port to connect to */ |
| protected int port; |
| |
| /** the URL to forward through */ |
| protected URL url; |
| |
| /** the object managing this connection through the URL */ |
| protected URLConnection conn = null; |
| |
| /** internal input stream for this socket */ |
| protected InputStream in = null; |
| |
| /** internal output stream for this socket */ |
| protected OutputStream out = null; |
| |
| /** the notifying input stream returned to users */ |
| protected HttpSendInputStream inNotifier; |
| |
| /** the notifying output stream returned to users */ |
| protected HttpSendOutputStream outNotifier; |
| |
| /** |
| * Line separator string. This is the value of the line.separator |
| * property at the moment that the socket was created. |
| */ |
| private String lineSeparator = |
| java.security.AccessController.doPrivileged( |
| new sun.security.action.GetPropertyAction("line.separator")); |
| |
| /** |
| * Create a stream socket and connect it to the specified port on |
| * the specified host. |
| * @param host the host |
| * @param port the port |
| */ |
| public HttpSendSocket(String host, int port, URL url) throws IOException |
| { |
| super((SocketImpl)null); // no underlying SocketImpl for this object |
| |
| if (RMIMasterSocketFactory.proxyLog.isLoggable(Log.VERBOSE)) { |
| RMIMasterSocketFactory.proxyLog.log(Log.VERBOSE, |
| "host = " + host + ", port = " + port + ", url = " + url); |
| } |
| |
| this.host = host; |
| this.port = port; |
| this.url = url; |
| |
| inNotifier = new HttpSendInputStream(null, this); |
| outNotifier = new HttpSendOutputStream(writeNotify(), this); |
| } |
| |
| /** |
| * Create a stream socket and connect it to the specified port on |
| * the specified host. |
| * @param host the host |
| * @param port the port |
| */ |
| public HttpSendSocket(String host, int port) throws IOException |
| { |
| this(host, port, new URL("http", host, port, "/")); |
| } |
| |
| /** |
| * Create a stream socket and connect it to the specified address on |
| * the specified port. |
| * @param address the address |
| * @param port the port |
| */ |
| public HttpSendSocket(InetAddress address, int port) throws IOException |
| { |
| this(address.getHostName(), port); |
| } |
| |
| /** |
| * Indicate that this socket is not reusable. |
| */ |
| public boolean isReusable() |
| { |
| return false; |
| } |
| |
| /** |
| * Create a new socket connection to host (or proxy), and prepare to |
| * send HTTP transmission. |
| */ |
| public synchronized OutputStream writeNotify() throws IOException |
| { |
| if (conn != null) { |
| throw new IOException("attempt to write on HttpSendSocket after " + |
| "request has been sent"); |
| } |
| |
| conn = url.openConnection(); |
| conn.setDoOutput(true); |
| conn.setUseCaches(false); |
| conn.setRequestProperty("Content-type", "application/octet-stream"); |
| |
| inNotifier.deactivate(); |
| in = null; |
| |
| return out = conn.getOutputStream(); |
| } |
| |
| /** |
| * Send HTTP output transmission and prepare to receive response. |
| */ |
| public synchronized InputStream readNotify() throws IOException |
| { |
| RMIMasterSocketFactory.proxyLog.log(Log.VERBOSE, |
| "sending request and activating input stream"); |
| |
| outNotifier.deactivate(); |
| out.close(); |
| out = null; |
| |
| try { |
| in = conn.getInputStream(); |
| } catch (IOException e) { |
| RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, |
| "failed to get input stream, exception: ", e); |
| |
| throw new IOException("HTTP request failed"); |
| } |
| |
| /* |
| * If an HTTP error response is returned, sometimes an IOException |
| * is thrown, which is handled above, and other times it isn't, and |
| * the error response body will be available for reading. |
| * As a safety net to catch any such unexpected HTTP behavior, we |
| * verify that the content type of the response is what the |
| * HttpOutputStream generates: "application/octet-stream". |
| * (Servers' error responses will generally be "text/html".) |
| * Any error response body is printed to the log. |
| */ |
| String contentType = conn.getContentType(); |
| if (contentType == null || |
| !conn.getContentType().equals("application/octet-stream")) |
| { |
| if (RMIMasterSocketFactory.proxyLog.isLoggable(Log.BRIEF)) { |
| String message; |
| if (contentType == null) { |
| message = "missing content type in response" + |
| lineSeparator; |
| } else { |
| message = "invalid content type in response: " + |
| contentType + lineSeparator; |
| } |
| |
| message += "HttpSendSocket.readNotify: response body: "; |
| try { |
| DataInputStream din = new DataInputStream(in); |
| String line; |
| while ((line = din.readLine()) != null) |
| message += line + lineSeparator; |
| } catch (IOException e) { |
| } |
| RMIMasterSocketFactory.proxyLog.log(Log.BRIEF, message); |
| } |
| |
| throw new IOException("HTTP request failed"); |
| } |
| |
| return in; |
| } |
| |
| /** |
| * Get the address to which the socket is connected. |
| */ |
| public InetAddress getInetAddress() |
| { |
| try { |
| return InetAddress.getByName(host); |
| } catch (UnknownHostException e) { |
| return null; // null if couldn't resolve destination host |
| } |
| } |
| |
| /** |
| * Get the local address to which the socket is bound. |
| */ |
| public InetAddress getLocalAddress() |
| { |
| try { |
| return InetAddress.getLocalHost(); |
| } catch (UnknownHostException e) { |
| return null; // null if couldn't determine local host |
| } |
| } |
| |
| /** |
| * Get the remote port to which the socket is connected. |
| */ |
| public int getPort() |
| { |
| return port; |
| } |
| |
| /** |
| * Get the local port to which the socket is connected. |
| */ |
| public int getLocalPort() |
| { |
| return -1; // request not applicable to this socket type |
| } |
| |
| /** |
| * Get an InputStream for this socket. |
| */ |
| public InputStream getInputStream() throws IOException |
| { |
| return inNotifier; |
| } |
| |
| /** |
| * Get an OutputStream for this socket. |
| */ |
| public OutputStream getOutputStream() throws IOException |
| { |
| return outNotifier; |
| } |
| |
| /** |
| * Enable/disable TCP_NODELAY. |
| * This operation has no effect for an HttpSendSocket. |
| */ |
| public void setTcpNoDelay(boolean on) throws SocketException |
| { |
| } |
| |
| /** |
| * Retrieve whether TCP_NODELAY is enabled. |
| */ |
| public boolean getTcpNoDelay() throws SocketException |
| { |
| return false; // imply option is disabled |
| } |
| |
| /** |
| * Enable/disable SO_LINGER with the specified linger time. |
| * This operation has no effect for an HttpSendSocket. |
| */ |
| public void setSoLinger(boolean on, int val) throws SocketException |
| { |
| } |
| |
| /** |
| * Retrive setting for SO_LINGER. |
| */ |
| public int getSoLinger() throws SocketException |
| { |
| return -1; // imply option is disabled |
| } |
| |
| /** |
| * Enable/disable SO_TIMEOUT with the specified timeout |
| * This operation has no effect for an HttpSendSocket. |
| */ |
| public synchronized void setSoTimeout(int timeout) throws SocketException |
| { |
| } |
| |
| /** |
| * Retrive setting for SO_TIMEOUT. |
| */ |
| public synchronized int getSoTimeout() throws SocketException |
| { |
| return 0; // imply option is disabled |
| } |
| |
| /** |
| * Close the socket. |
| */ |
| public synchronized void close() throws IOException |
| { |
| if (out != null) // push out transmission if not done |
| out.close(); |
| } |
| |
| /** |
| * Return string representation of this pseudo-socket. |
| */ |
| public String toString() |
| { |
| return "HttpSendSocket[host=" + host + |
| ",port=" + port + |
| ",url=" + url + "]"; |
| } |
| } |