| /* |
| * Copyright (c) 1994, 2010, 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.net; |
| |
| import java.io.*; |
| import java.net.Socket; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.UnknownHostException; |
| import java.net.Proxy; |
| import java.util.Arrays; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| /** |
| * This is the base class for network clients. |
| * |
| * @author Jonathan Payne |
| */ |
| public class NetworkClient { |
| /* Default value of read timeout, if not specified (infinity) */ |
| public static final int DEFAULT_READ_TIMEOUT = -1; |
| |
| /* Default value of connect timeout, if not specified (infinity) */ |
| public static final int DEFAULT_CONNECT_TIMEOUT = -1; |
| |
| protected Proxy proxy = Proxy.NO_PROXY; |
| /** Socket for communicating with server. */ |
| protected Socket serverSocket = null; |
| |
| /** Stream for printing to the server. */ |
| public PrintStream serverOutput; |
| |
| /** Buffered stream for reading replies from server. */ |
| public InputStream serverInput; |
| |
| protected static int defaultSoTimeout; |
| protected static int defaultConnectTimeout; |
| |
| protected int readTimeout = DEFAULT_READ_TIMEOUT; |
| protected int connectTimeout = DEFAULT_CONNECT_TIMEOUT; |
| /* Name of encoding to use for output */ |
| protected static String encoding; |
| |
| static { |
| final int vals[] = {0, 0}; |
| final String encs[] = { null }; |
| |
| AccessController.doPrivileged( |
| new PrivilegedAction<Void>() { |
| public Void run() { |
| vals[0] = Integer.getInteger("sun.net.client.defaultReadTimeout", 0).intValue(); |
| vals[1] = Integer.getInteger("sun.net.client.defaultConnectTimeout", 0).intValue(); |
| encs[0] = System.getProperty("file.encoding", "ISO8859_1"); |
| return null; |
| } |
| }); |
| if (vals[0] != 0) { |
| defaultSoTimeout = vals[0]; |
| } |
| if (vals[1] != 0) { |
| defaultConnectTimeout = vals[1]; |
| } |
| |
| encoding = encs[0]; |
| try { |
| if (!isASCIISuperset (encoding)) { |
| encoding = "ISO8859_1"; |
| } |
| } catch (Exception e) { |
| encoding = "ISO8859_1"; |
| } |
| } |
| |
| |
| /** |
| * Test the named character encoding to verify that it converts ASCII |
| * characters correctly. We have to use an ASCII based encoding, or else |
| * the NetworkClients will not work correctly in EBCDIC based systems. |
| * However, we cannot just use ASCII or ISO8859_1 universally, because in |
| * Asian locales, non-ASCII characters may be embedded in otherwise |
| * ASCII based protocols (eg. HTTP). The specifications (RFC2616, 2398) |
| * are a little ambiguous in this matter. For instance, RFC2398 [part 2.1] |
| * says that the HTTP request URI should be escaped using a defined |
| * mechanism, but there is no way to specify in the escaped string what |
| * the original character set is. It is not correct to assume that |
| * UTF-8 is always used (as in URLs in HTML 4.0). For this reason, |
| * until the specifications are updated to deal with this issue more |
| * comprehensively, and more importantly, HTTP servers are known to |
| * support these mechanisms, we will maintain the current behavior |
| * where it is possible to send non-ASCII characters in their original |
| * unescaped form. |
| */ |
| private static boolean isASCIISuperset (String encoding) throws Exception { |
| String chkS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"+ |
| "abcdefghijklmnopqrstuvwxyz-_.!~*'();/?:@&=+$,"; |
| |
| // Expected byte sequence for string above |
| byte[] chkB = { 48,49,50,51,52,53,54,55,56,57,65,66,67,68,69,70,71,72, |
| 73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,97,98,99, |
| 100,101,102,103,104,105,106,107,108,109,110,111,112,113,114, |
| 115,116,117,118,119,120,121,122,45,95,46,33,126,42,39,40,41,59, |
| 47,63,58,64,38,61,43,36,44}; |
| |
| byte[] b = chkS.getBytes (encoding); |
| return Arrays.equals (b, chkB); |
| } |
| |
| /** Open a connection to the server. */ |
| public void openServer(String server, int port) |
| throws IOException, UnknownHostException { |
| if (serverSocket != null) |
| closeServer(); |
| serverSocket = doConnect (server, port); |
| try { |
| serverOutput = new PrintStream(new BufferedOutputStream( |
| serverSocket.getOutputStream()), |
| true, encoding); |
| } catch (UnsupportedEncodingException e) { |
| throw new InternalError(encoding +"encoding not found"); |
| } |
| serverInput = new BufferedInputStream(serverSocket.getInputStream()); |
| } |
| |
| /** |
| * Return a socket connected to the server, with any |
| * appropriate options pre-established |
| */ |
| protected Socket doConnect (String server, int port) |
| throws IOException, UnknownHostException { |
| Socket s; |
| if (proxy != null) { |
| if (proxy.type() == Proxy.Type.SOCKS) { |
| s = AccessController.doPrivileged( |
| new PrivilegedAction<Socket>() { |
| public Socket run() { |
| return new Socket(proxy); |
| }}); |
| } else if (proxy.type() == Proxy.Type.DIRECT) { |
| s = createSocket(); |
| } else { |
| // Still connecting through a proxy |
| // server & port will be the proxy address and port |
| s = new Socket(Proxy.NO_PROXY); |
| } |
| } else |
| s = createSocket(); |
| // Instance specific timeouts do have priority, that means |
| // connectTimeout & readTimeout (-1 means not set) |
| // Then global default timeouts |
| // Then no timeout. |
| if (connectTimeout >= 0) { |
| s.connect(new InetSocketAddress(server, port), connectTimeout); |
| } else { |
| if (defaultConnectTimeout > 0) { |
| s.connect(new InetSocketAddress(server, port), defaultConnectTimeout); |
| } else { |
| s.connect(new InetSocketAddress(server, port)); |
| } |
| } |
| if (readTimeout >= 0) |
| s.setSoTimeout(readTimeout); |
| else if (defaultSoTimeout > 0) { |
| s.setSoTimeout(defaultSoTimeout); |
| } |
| return s; |
| } |
| |
| /** |
| * The following method, createSocket, is provided to allow the |
| * https client to override it so that it may use its socket factory |
| * to create the socket. |
| */ |
| protected Socket createSocket() throws IOException { |
| return new java.net.Socket(); |
| } |
| |
| protected InetAddress getLocalAddress() throws IOException { |
| if (serverSocket == null) |
| throw new IOException("not connected"); |
| return AccessController.doPrivileged( |
| new PrivilegedAction<InetAddress>() { |
| public InetAddress run() { |
| return serverSocket.getLocalAddress(); |
| |
| } |
| }); |
| } |
| |
| /** Close an open connection to the server. */ |
| public void closeServer() throws IOException { |
| if (! serverIsOpen()) { |
| return; |
| } |
| serverSocket.close(); |
| serverSocket = null; |
| serverInput = null; |
| serverOutput = null; |
| } |
| |
| /** Return server connection status */ |
| public boolean serverIsOpen() { |
| return serverSocket != null; |
| } |
| |
| /** Create connection with host <i>host</i> on port <i>port</i> */ |
| public NetworkClient(String host, int port) throws IOException { |
| openServer(host, port); |
| } |
| |
| public NetworkClient() {} |
| |
| public void setConnectTimeout(int timeout) { |
| connectTimeout = timeout; |
| } |
| |
| public int getConnectTimeout() { |
| return connectTimeout; |
| } |
| |
| /** |
| * Sets the read timeout. |
| * |
| * Note: Public URLConnection (and protocol specific implementations) |
| * protect against negative timeout values being set. This implemenation, |
| * and protocol specific implementations, use -1 to represent the default |
| * read timeout. |
| * |
| * This method may be invoked with the default timeout value when the |
| * protocol handler is trying to reset the timeout after doing a |
| * potentially blocking internal operation, e.g. cleaning up unread |
| * response data, buffering error stream response data, etc |
| */ |
| public void setReadTimeout(int timeout) { |
| if (timeout == DEFAULT_READ_TIMEOUT) |
| timeout = defaultSoTimeout; |
| |
| if (serverSocket != null && timeout >= 0) { |
| try { |
| serverSocket.setSoTimeout(timeout); |
| } catch(IOException e) { |
| // We tried... |
| } |
| } |
| readTimeout = timeout; |
| } |
| |
| public int getReadTimeout() { |
| return readTimeout; |
| } |
| } |
