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/* HttpURLConnection.java -- URLConnection class for HTTP protocol |
/* HttpURLConnection.java -- URLConnection class for HTTP protocol |
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Copyright (C) 1998, 2002 Free Software Foundation, Inc. |
Copyright (C) 1998, 2002, 2003 Free Software Foundation, Inc. |
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This file is part of GNU Classpath. |
This file is part of GNU Classpath. |
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import java.io.IOException; |
import java.io.IOException; |
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import java.util.Iterator; |
import java.util.Iterator; |
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import java.util.Map; |
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 |
* This subclass of java.net.URLConnection models a URLConnection via |
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* the HTTP protocol. |
* the HTTP protocol. |
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* |
* |
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* @version 0.1 |
* @author Aaron M. Renn (arenn@urbanophile.com) |
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* |
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* @author Aaron M. Renn (arenn@urbanophile.com) |
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*/ |
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public class HttpURLConnection extends java.net.HttpURLConnection |
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{ |
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/*************************************************************************/ |
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/* |
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* Instance Variables |
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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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/** |
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* The InputStream for this connection |
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*/ |
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private DataInputStream in_stream; |
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/** |
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* The OutputStream for this connection |
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*/ |
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private OutputStream out_stream; |
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/** |
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* buffered_out_stream is a buffer to contain content of the HTTP request, |
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* and will be written to out_stream all at once |
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*/ |
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private ByteArrayOutputStream buffered_out_stream; |
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/** |
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* The PrintWriter for this connection (used internally) |
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*/ |
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private PrintWriter out_writer; |
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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 gnu.java.net.HeaderFieldHelper headers = |
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new gnu.java.net.HeaderFieldHelper(); |
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/*************************************************************************/ |
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/* |
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* Constructors |
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*/ |
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/** |
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* Calls superclass constructor to initialize |
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*/ |
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protected |
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HttpURLConnection(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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/* |
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* Instance Methods |
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*/ |
*/ |
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public class HttpURLConnection extends java.net.HttpURLConnection |
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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 |
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connect() throws IOException |
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{ |
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// Connect up |
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if (url.getPort() == -1) |
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socket = new Socket(url.getHost(), 80); |
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else |
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socket = new Socket(url.getHost(), url.getPort()); |
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out_stream = new BufferedOutputStream(socket.getOutputStream()); |
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out_writer = new PrintWriter(new OutputStreamWriter(out_stream, "8859_1")); |
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connected = true; |
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} |
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/** |
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* write HTTP request header and content to out_writer |
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*/ |
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void SendRequest() throws IOException |
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{ |
{ |
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// Send the request |
/** |
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out_writer.print(getRequestMethod() + " " + getURL().getFile() + |
* The socket we are connected to |
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" HTTP/1.1\r\n"); |
*/ |
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private Socket socket; |
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/** |
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* The InputStream for this connection |
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*/ |
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private DataInputStream in_stream; |
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/** |
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* The OutputStream for this connection |
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*/ |
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private OutputStream out_stream; |
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/** |
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* buffered_out_stream is a buffer to contain content of the HTTP request, |
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* and will be written to out_stream all at once |
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*/ |
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private ByteArrayOutputStream buffered_out_stream; |
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/** |
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* The PrintWriter for this connection (used internally) |
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*/ |
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private PrintWriter out_writer; |
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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 HttpURLConnection (URL url) |
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{ |
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super (url); |
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if (getRequestProperty("host") == null){ |
/* Set up some variables */ |
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setRequestProperty("Host", getURL().getHost()); |
doOutput = false; |
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} |
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if (getRequestProperty("Connection") == null){ |
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setRequestProperty("Connection", "Close"); |
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} |
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if (getRequestProperty("user-agent") == null){ |
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setRequestProperty("user-agent", |
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"gnu-classpath/" + System.getProperty("classpath.version")); |
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} |
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if (getRequestProperty("accept") == null){ |
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setRequestProperty("accept", "*/*"); |
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} |
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if (getRequestProperty("Content-type") == null){ |
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setRequestProperty("Content-type", "application/x-www-form-urlencoded"); |
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} |
} |
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// Write all req_props name-value pairs to the output writer |
/** |
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Iterator itr = getRequestProperties().entrySet().iterator(); |
* Connects to the remote host, sends the request, and parses the reply |
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while(itr.hasNext()){ |
* code and header information returned |
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Map.Entry e = (Map.Entry) itr.next(); |
*/ |
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out_writer.print(e.getKey() + ": " + e.getValue() + "\r\n"); |
public void connect() throws IOException |
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} |
{ |
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// Connect up |
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if (url.getPort() == -1) |
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socket = new Socket(url.getHost(), 80); |
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else |
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socket = new Socket(url.getHost(), url.getPort()); |
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out_stream = new BufferedOutputStream(socket.getOutputStream()); |
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out_writer = new PrintWriter(new OutputStreamWriter(out_stream, "8859_1")); |
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// Write Content-type and length |
connected = true; |
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if(buffered_out_stream != null){ |
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out_writer.print("Content-type: application/x-www-form-urlencoded\r\n"); |
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out_writer.print("Content-length: " |
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+ String.valueOf(buffered_out_stream.size()) + "\r\n"); |
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} |
} |
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// One more CR-LF indicates end of header |
/** |
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out_writer.print("\r\n"); |
* write HTTP request header and content to out_writer |
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out_writer.flush(); |
*/ |
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void SendRequest() throws IOException |
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// Write content |
{ |
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if(buffered_out_stream != null){ |
// Send the request |
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buffered_out_stream.writeTo(out_stream); |
out_writer.print(getRequestMethod() + " " + getURL().getFile() |
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out_stream.flush(); |
+ " HTTP/1.1\r\n"); |
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if (getRequestProperty ("host") == null) |
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{ |
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setRequestProperty ("Host", getURL().getHost()); |
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} |
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if (getRequestProperty ("Connection") == null) |
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{ |
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setRequestProperty ("Connection", "Close"); |
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} |
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if (getRequestProperty ("user-agent") == null) |
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{ |
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setRequestProperty ("user-agent", "gnu-classpath/" |
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+ System.getProperty ("classpath.version")); |
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} |
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if (getRequestProperty ("accept") == null) |
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{ |
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setRequestProperty ("accept", "*/*"); |
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} |
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if (getRequestProperty ("Content-type") == null) |
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{ |
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setRequestProperty ("Content-type", "application/x-www-form-urlencoded"); |
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} |
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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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out_writer.print (e.getKey() + ": " + e.getValue() + "\r\n"); |
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} |
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// Write Content-type and length |
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if (buffered_out_stream != null) |
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{ |
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out_writer.print ("Content-type: application/x-www-form-urlencoded\r\n"); |
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out_writer.print ("Content-length: " |
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+ String.valueOf (buffered_out_stream.size()) + "\r\n"); |
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} |
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// One more CR-LF indicates end of header |
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out_writer.print ("\r\n"); |
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out_writer.flush(); |
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// Write content |
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if (buffered_out_stream != null) |
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{ |
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buffered_out_stream.writeTo (out_stream); |
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out_stream.flush(); |
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} |
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} |
} |
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} |
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/** |
/** |
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* Read HTTP reply from in_stream |
* Read HTTP reply from in_stream |
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*/ |
*/ |
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void ReceiveReply() throws IOException |
void ReceiveReply() throws IOException |
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{ |
{ |
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// Parse the reply |
// Parse the reply |
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String line = in_stream.readLine(); |
String line = in_stream.readLine(); |
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String saveline = line; |
String saveline = line; |
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int idx = line.indexOf (" "); |
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int idx = line.indexOf(" " ); |
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if ((idx == -1) || (line.length() < (idx + 6))) |
if ((idx == -1) |
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throw new IOException("Server reply was unparseable: " + saveline); |
|| (line.length() < (idx + 6))) |
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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); |
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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for (;;) |
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{ |
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line = in_stream.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(" ") || 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(" ") || 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, 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) || (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(" ") || 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, value); |
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} |
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} |
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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 |
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disconnect() |
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{ |
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try |
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{ |
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if (socket != null) |
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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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/*************************************************************************/ |
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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 |
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setRequestMethod(String method) throws ProtocolException |
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{ |
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method = method.toUpperCase(); |
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if (method.equals("GET") || method.equals("HEAD") || method.equals("POST")) |
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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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/*************************************************************************/ |
line = line.substring (idx + 1); |
205 |
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String code = line.substring (0, 3); |
206 |
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207 |
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try |
208 |
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{ |
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responseCode = Integer.parseInt (code); |
210 |
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} |
211 |
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catch (NumberFormatException e) |
212 |
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{ |
213 |
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throw new IOException ("Server reply was unparseable: " + saveline); |
214 |
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} |
215 |
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216 |
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responseMessage = line.substring (4); |
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/** |
// Now read the header lines |
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* Return a boolean indicating whether or not this connection is |
String key = null, value = null; |
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* going through a proxy |
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* |
for (;;) |
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* @return true if using a proxy, false otherwise |
{ |
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*/ |
line = in_stream.readLine(); |
224 |
public boolean |
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usingProxy() |
if (line.equals("")) |
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{ |
break; |
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return(false); |
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} |
// Check for folded lines |
229 |
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if (line.startsWith (" ") |
230 |
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|| line.startsWith("\t")) |
231 |
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{ |
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// Trim off leading space |
233 |
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do |
234 |
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{ |
235 |
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if (line.length() == 1) |
236 |
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throw new IOException("Server header lines were unparseable: " |
237 |
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+ line); |
238 |
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239 |
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line = line.substring (1); |
240 |
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} |
241 |
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while (line.startsWith(" ") |
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|| line.startsWith("\t")); |
243 |
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244 |
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value = value + " " + line; |
245 |
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} |
246 |
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else |
247 |
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{ |
248 |
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if (key != null) |
249 |
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{ |
250 |
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headers.addHeaderField (key, value); |
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key = null; |
252 |
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value = null; |
253 |
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} |
254 |
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255 |
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// Parse out key and value |
256 |
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idx = line.indexOf (":"); |
257 |
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if ((idx == -1) |
258 |
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|| (line.length() < (idx + 2))) |
259 |
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throw new IOException ("Server header lines were unparseable: " |
260 |
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+ line); |
261 |
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262 |
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key = line.substring (0, idx); |
263 |
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value = line.substring (idx + 1); |
264 |
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265 |
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// Trim off leading space |
266 |
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while (value.startsWith (" ") |
267 |
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|| value.startsWith ("\t")) |
268 |
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{ |
269 |
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if (value.length() == 1) |
270 |
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throw new IOException ("Server header lines were unparseable: " |
271 |
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+ line); |
272 |
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273 |
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value = value.substring (1); |
274 |
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} |
275 |
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} |
276 |
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} |
277 |
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278 |
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if (key != null) |
279 |
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{ |
280 |
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headers.addHeaderField (key, value); |
281 |
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} |
282 |
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} |
283 |
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284 |
/*************************************************************************/ |
/** |
285 |
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* Disconnects from the remote server |
286 |
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*/ |
287 |
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public void disconnect() |
288 |
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{ |
289 |
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try |
290 |
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{ |
291 |
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if (socket != null) |
292 |
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socket.close(); |
293 |
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} |
294 |
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catch (IOException e) |
295 |
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{ |
296 |
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} |
297 |
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} |
298 |
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|
299 |
/** |
/** |
300 |
* This method returns the header field key at the specified numeric |
* Overrides java.net.HttpURLConnection.setRequestMethod() in order to |
301 |
* index. |
* restrict the available methods to only those we support. |
302 |
* |
* |
303 |
* @param n The index into the header field array |
* @param method The RequestMethod to use |
304 |
* |
* |
305 |
* @return The name of the header field key, or <code>null</code> if the |
* @exception ProtocolException If the specified method is not valid |
306 |
* specified index is not valid. |
*/ |
307 |
*/ |
public void setRequestMethod (String method) throws ProtocolException |
308 |
public String |
{ |
309 |
getHeaderFieldKey(int n) |
method = method.toUpperCase(); |
310 |
{ |
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311 |
return(headers.getHeaderFieldKeyByIndex(n)); |
if (method.equals("GET") |
312 |
} |
|| method.equals("HEAD") |
313 |
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|| method.equals("POST")) |
314 |
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super.setRequestMethod (method); |
315 |
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else |
316 |
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throw new ProtocolException ("Unsupported or unknown request method " + |
317 |
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method); |
318 |
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} |
319 |
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|
320 |
/*************************************************************************/ |
/** |
321 |
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* Return a boolean indicating whether or not this connection is |
322 |
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* going through a proxy |
323 |
|
* |
324 |
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* @return true if using a proxy, false otherwise |
325 |
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*/ |
326 |
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public boolean usingProxy() |
327 |
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{ |
328 |
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return false; |
329 |
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} |
330 |
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|
331 |
/** |
/** |
332 |
* This method returns the header field value at the specified numeric |
* This method returns the header field key at the specified numeric |
333 |
* index. |
* index. |
334 |
* |
* |
335 |
* @param n The index into the header field array |
* @param n The index into the header field array |
336 |
* |
* |
337 |
* @return The value of the specified header field, or <code>null</code> |
* @return The name of the header field key, or <code>null</code> if the |
338 |
* if the specified index is not valid. |
* specified index is not valid. |
339 |
*/ |
*/ |
340 |
public String |
public String getHeaderFieldKey (int n) |
341 |
getHeaderField(int n) |
{ |
342 |
{ |
return headers.getHeaderFieldKeyByIndex (n); |
343 |
return(headers.getHeaderFieldValueByIndex(n)); |
} |
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} |
|
344 |
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|
345 |
/*************************************************************************/ |
/** |
346 |
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* This method returns the header field value at the specified numeric |
347 |
|
* index. |
348 |
|
* |
349 |
|
* @param n The index into the header field array |
350 |
|
* |
351 |
|
* @return The value of the specified header field, or <code>null</code> |
352 |
|
* if the specified index is not valid. |
353 |
|
*/ |
354 |
|
public String getHeaderField (int n) |
355 |
|
{ |
356 |
|
return headers.getHeaderFieldValueByIndex (n); |
357 |
|
} |
358 |
|
|
359 |
/** |
/** |
360 |
* Returns an InputStream for reading from this connection. This stream |
* Returns an InputStream for reading from this connection. This stream |
361 |
* will be "queued up" for reading just the contents of the requested file. |
* will be "queued up" for reading just the contents of the requested file. |
362 |
* Overrides URLConnection.getInputStream() |
* Overrides URLConnection.getInputStream() |
363 |
* |
* |
364 |
* @return An InputStream for this connection. |
* @return An InputStream for this connection. |
365 |
* |
* |
366 |
* @exception IOException If an error occurs |
* @exception IOException If an error occurs |
367 |
*/ |
*/ |
368 |
public InputStream |
public InputStream getInputStream() throws IOException |
369 |
getInputStream() throws IOException |
{ |
370 |
{ |
if(in_stream != null) |
371 |
if(in_stream != null) |
return in_stream; |
|
return in_stream; |
|
372 |
|
|
373 |
if (!connected) |
if (!connected) |
374 |
connect(); |
connect(); |
375 |
|
|
376 |
in_stream |
in_stream |
377 |
= new DataInputStream(new BufferedInputStream(socket.getInputStream())); |
= new DataInputStream (new BufferedInputStream (socket.getInputStream())); |
378 |
|
|
379 |
SendRequest(); |
SendRequest(); |
380 |
ReceiveReply(); |
ReceiveReply(); |
381 |
|
|
382 |
return(in_stream); |
return in_stream; |
383 |
} |
} |
384 |
|
|
385 |
public java.io.OutputStream |
public OutputStream getOutputStream() throws IOException |
386 |
getOutputStream() throws java.io.IOException |
{ |
387 |
{ |
if (!doOutput) |
|
if(!doOutput) |
|
388 |
throw new ProtocolException |
throw new ProtocolException |
389 |
("Want output stream while haven't setDoOutput(true)"); |
("Want output stream while haven't setDoOutput(true)"); |
390 |
if(!method.equals("POST")) //But we might support "PUT" in future |
|
391 |
setRequestMethod("POST"); |
if (!method.equals ("POST")) //But we might support "PUT" in future |
392 |
|
setRequestMethod ("POST"); |
393 |
|
|
394 |
if (!connected) |
if (!connected) |
395 |
connect(); |
connect(); |
396 |
|
|
397 |
if(buffered_out_stream == null) |
if(buffered_out_stream == null) |
398 |
buffered_out_stream = new ByteArrayOutputStream(256); //default is too small |
buffered_out_stream = new ByteArrayOutputStream (256); //default is too small |
399 |
|
|
400 |
return buffered_out_stream; |
return buffered_out_stream; |
401 |
} |
} |
402 |
|
|
403 |
} // class HttpURLConnection |
} // class HttpURLConnection |
|
|
|