
* gnu/java/net/protocol/http/Connection.java (inputStream): Made it a DataInputStream. (requestProperties): Removed. (hdrHash): Removed. (hdrVec): Removed. (headers): New field to store headers. (connect): Initialize inputStream. (receiveReply): Merged from classpath. The new algorithm is line based instead of character based. (getHeaderField): Use headers. (getHeaderFields): Use headers. (getKey): Removed. (getField): Removed. * gnu/java/net/HeaderFieldHelper.java: New file. * Makefile.am (ordinary_java_source_files): Added gnu/java/net/HeaderFieldHelper.java. * Makefile.in: Regenerated. From-SVN: r75183
448 lines
11 KiB
Java
448 lines
11 KiB
Java
/* HttpURLConnection.java -- URLConnection class for HTTP protocol
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Copyright (C) 1998, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.net.protocol.http;
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import java.io.BufferedInputStream;
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import java.io.DataInputStream;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.PrintWriter;
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import java.net.HttpURLConnection;
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import java.net.ProtocolException;
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import java.net.Socket;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.Iterator;
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import java.util.Map;
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import gnu.java.net.HeaderFieldHelper;
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/**
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* This subclass of java.net.URLConnection models a URLConnection via
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* the HTTP protocol.
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*
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* Status: Minimal subset of functionality. Proxies only partially
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* handled; Redirects not yet handled. FileNameMap handling needs to
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* be considered. useCaches, ifModifiedSince, and
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* allowUserInteraction need consideration as well as doInput and
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* doOutput.
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*
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* @author Aaron M. Renn <arenn@urbanophile.com>
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* @author Warren Levy <warrenl@cygnus.com>
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*/
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public final class Connection extends HttpURLConnection
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{
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/**
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* The socket we are connected to
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*/
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private Socket socket;
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private static int proxyPort = 80;
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private static boolean proxyInUse = false;
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private static String proxyHost = null;
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static
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{
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// Recognize some networking properties listed at
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// http://java.sun.com/j2se/1.4/docs/guide/net/properties.html.
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String port = null;
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proxyHost = System.getProperty("http.proxyHost");
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if (proxyHost != null)
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{
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proxyInUse = true;
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if ((port = System.getProperty("http.proxyPort")) != null)
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{
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try
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{
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proxyPort = Integer.parseInt(port);
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}
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catch (Throwable t)
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{
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// Nothing.
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}
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}
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}
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}
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/**
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* The InputStream for this connection.
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*/
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private DataInputStream inputStream;
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/**
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* This is the object that holds the header field information
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*/
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private HeaderFieldHelper headers = new HeaderFieldHelper();
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/**
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* Calls superclass constructor to initialize
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*/
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protected Connection(URL url)
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{
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super(url);
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/* Set up some variables */
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doOutput = false;
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}
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/**
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* Connects to the remote host, sends the request, and parses the reply
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* code and header information returned
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*/
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public void connect() throws IOException
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{
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// Call is ignored if already connected.
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if (connected)
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return;
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// Get address and port number.
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int port;
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if (proxyInUse)
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{
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port = proxyPort;
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socket = new Socket(proxyHost, port);
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}
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else
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{
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if ((port = url.getPort()) == -1)
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port = 80;
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// Open socket and output stream.
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socket = new Socket(url.getHost(), port);
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}
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inputStream =
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new DataInputStream(new BufferedInputStream(socket.getInputStream()));
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sendRequest();
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receiveReply();
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connected = true;
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}
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/**
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* Disconnects from the remote server.
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*/
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public void disconnect()
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{
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if (socket != null)
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{
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try
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{
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socket.close();
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}
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catch (IOException e)
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{
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// Ignore errors in closing socket.
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}
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socket = null;
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}
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}
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/**
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* Write HTTP request header and content to outputWriter.
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*/
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void sendRequest() throws IOException
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{
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// Create PrintWriter for easier sending of headers.
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PrintWriter outputWriter = new PrintWriter(socket.getOutputStream());
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// Send request including any request properties that were set.
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outputWriter.print (getRequestMethod() + " " + url.getFile()
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+ " HTTP/1.0\r\n");
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// Set additional HTTP headers.
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if (getRequestProperty ("Host") == null)
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setRequestProperty ("Host", url.getHost());
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// Write all req_props name-value pairs to the output writer.
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Iterator itr = getRequestProperties().entrySet().iterator();
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while (itr.hasNext())
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{
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Map.Entry e = (Map.Entry) itr.next();
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outputWriter.print (e.getKey() + ": " + e.getValue() + "\r\n");
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}
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// One more CR-LF indicates end of header.
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outputWriter.print ("\r\n");
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outputWriter.flush();
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}
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/**
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* Read HTTP reply from inputStream.
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*/
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private void receiveReply() throws IOException
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{
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// Parse the reply
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String line = inputStream.readLine();
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String saveline = line;
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int idx = line.indexOf (" ");
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if ((idx == -1)
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|| (line.length() < (idx + 6)))
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throw new IOException ("Server reply was unparseable: " + saveline);
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headers.addHeaderField (null, line);
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line = line.substring (idx + 1);
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String code = line.substring (0, 3);
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try
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{
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responseCode = Integer.parseInt (code);
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}
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catch (NumberFormatException e)
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{
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throw new IOException ("Server reply was unparseable: " + saveline);
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}
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responseMessage = line.substring (4);
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// Now read the header lines
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String key = null, value = null;
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while (true)
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{
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line = inputStream.readLine();
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if (line.equals(""))
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break;
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// Check for folded lines
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if (line.startsWith (" ")
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|| line.startsWith("\t"))
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{
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// Trim off leading space
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do
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{
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if (line.length() == 1)
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throw new IOException("Server header lines were unparseable: "
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+ line);
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line = line.substring (1);
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}
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while (line.startsWith(" ")
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|| line.startsWith("\t"));
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value = value + " " + line;
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}
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else
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{
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if (key != null)
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{
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headers.addHeaderField (key.toLowerCase(), value);
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key = null;
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value = null;
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}
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// Parse out key and value
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idx = line.indexOf (":");
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if ((idx == -1)
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|| (line.length() < (idx + 2)))
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throw new IOException ("Server header lines were unparseable: "
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+ line);
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key = line.substring (0, idx);
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value = line.substring (idx + 1);
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// Trim off leading space
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while (value.startsWith (" ")
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|| value.startsWith ("\t"))
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{
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if (value.length() == 1)
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throw new IOException ("Server header lines were unparseable: "
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+ line);
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value = value.substring (1);
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}
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}
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}
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if (key != null)
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{
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headers.addHeaderField (key.toLowerCase(), value.toLowerCase());
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}
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}
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/**
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* Return a boolean indicating whether or not this connection is
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* going through a proxy
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*
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* @return true if using a proxy, false otherwise
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*/
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public boolean usingProxy()
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{
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return proxyInUse;
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}
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/**
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* Returns an InputStream for reading from this connection. This stream
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* will be "queued up" for reading just the contents of the requested file.
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* Overrides URLConnection.getInputStream()
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*
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* @return An InputStream for this connection.
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*
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* @exception IOException If an error occurs
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*/
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public InputStream getInputStream() throws IOException
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{
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if (!connected)
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connect();
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if (!doInput)
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throw new ProtocolException("Can't open InputStream if doInput is false");
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return inputStream;
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}
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/**
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* Returns on OutputStream for writing to this connection.
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*
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* @return An OutputStream for this connection.
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*
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* @exception IOException If an error occurs
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*/
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public OutputStream getOutputStream() throws IOException
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{
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if (!doOutput)
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throw new ProtocolException
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("Want output stream while haven't setDoOutput(true)");
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if (!connected)
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connect();
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return socket.getOutputStream();
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}
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/**
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* Overrides java.net.HttpURLConnection.setRequestMethod() in order to
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* restrict the available methods to only those we support.
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*
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* @param method The RequestMethod to use
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*
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* @exception ProtocolException If the specified method is not valid
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*/
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public void setRequestMethod (String method) throws ProtocolException
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{
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method = method.toUpperCase();
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if (method.equals("GET"))
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super.setRequestMethod (method);
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else
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throw new ProtocolException ("Unsupported or unknown request method " +
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method);
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}
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public String getHeaderField(String name)
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{
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if (!connected)
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try
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{
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connect();
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}
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catch (IOException x)
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{
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return null;
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}
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return (String) headers.getHeaderFieldValueByKey(name.toLowerCase());
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}
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public Map getHeaderFields()
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{
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if (!connected)
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try
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{
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connect();
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}
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catch (IOException x)
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{
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return null;
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}
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return headers.getHeaderFields();
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}
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/**
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* This method returns the header field value at the specified numeric
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* index.
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*
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* @param n The index into the header field array
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*
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* @return The value of the specified header field, or <code>null</code>
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* if the specified index is not valid.
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*/
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public String getHeaderField(int n)
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{
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if (!connected)
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try
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{
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connect();
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}
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catch (IOException x)
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{
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return null;
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}
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return headers.getHeaderFieldValueByIndex (n);
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}
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/**
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* This method returns the header field key at the specified numeric
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* index.
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*
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* @param n The index into the header field array
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*
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* @return The name of the header field key, or <code>null</code> if the
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* specified index is not valid.
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*/
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public String getHeaderFieldKey(int n)
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{
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if (!connected)
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try
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{
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connect();
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}
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catch (IOException x)
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{
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return null;
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}
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return headers.getHeaderFieldKeyByIndex (n);
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}
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}
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