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i am trying to code a small XMPP gtalk client in java. I know there is a lot of libraries that help you that but the RFC is so easy to understand that i decide to write a client by myself. I know that the gtalk server is talk.google.com:5222 but when i try this small program i get this result :
HTTP/1.1 302 Found
Location: http://www.google.com/talk/
Content-Type: text/html
Content-Length: 151
<HTML><HEAD><TITLE>302 Moved</TITLE></HEAD><BODY><H1>302 Moved</H1>The document has moved <A HREF="http://www.google.com/talk/">here</A>.</BODY></HTML>
I also tried to connect the location specified but it doesn't work. Here is my code in java :
package fr.grosdim.myjabber;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.net.ssl.SSLPeerUnverifiedException;
import javax.net.ssl.SSLSocketFactory;
/**
* Hello world!
*
*/
public class App {
public static void main(String[] args) {
SSLSocketFactory factory = (SSLSocketFactory) SSLSocketFactory
.getDefault();
try {
Socket s = new Socket("talk.google.com", 5222);
PrintWriter out = new PrintWriter(s.getOutputStream());
out.println("<?xml version=\\'1.0\\' encoding=\\'utf-8\\' ?>");
out
.println("<stream:stream to='talk.google.com:5222' "
+ "xmlns='jabber:client'"
+ " xmlns:stream='http://etherx.jabber.org/streams' version='1.0'>");
out.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(s
.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
out.println("</stream>");
s.close();
} catch (SSLPeerUnverifiedException e) {
System.out.println(" Erreur d'auth :" + e.getLocalizedMessage());
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
System.out.println(e.getLocalizedMessage());
}
}
}
How can i connect to the gtalk server?
770
XMPP isn't a trivial protocol to implement, and I don't think you'll get very far by sending hand-crafted XML strings to the server.
I'd recommend studying some existing source code.
Spark and OpenFire are one example of a nice open source XMPP client and server implementation in java.
You might try getting OpenFire running locally in a debugger (or with verbose logging turned on) so you can get an idea of what it's doing with your packets.
61
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