如何在java中连接到gtalk？

Question

i am trying to code a small XMPP gtalk client in java. 我试图在java中编写一个小的XMPP gtalk客户端。 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. 我知道有很多库可以帮助你，但RFC很容易理解，我决定自己编写一个客户端。 I know that the gtalk server is talk.google.com:5222 but when i try this small program i get this result : 我知道gtalk服务器是talk.google.com:5222但是当我尝试这个小程序时，我得到了这个结果：

 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. 我也尝试连接指定的位置，但它不起作用。 Here is my code in java : 这是我在java中的代码：

    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? 我如何连接到gtalk服务器？

Answer 1

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. XMPP并不是一个很容易实现的协议，我认为通过向服务器发送手工制作的XML字符串，你不会走得太远。

I'd recommend studying some existing source code. 我建议学习一些现有的源代码。

Spark and OpenFire are one example of a nice open source XMPP client and server implementation in java. Spark和OpenFire是java中一个很好的开源 XMPP客户端和服务器实现的一个例子。

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. 您可以尝试在调试器中本地运行OpenFire（或打开详细日志记录），这样您就可以了解它对数据包执行的操作。

Answer 2

Although not directly related, you may need a server to test against and one for which you can see the source. 虽然没有直接关系，但您可能需要一台服务器进行测试，另一台服务器可以查看源代码。 I suggest that you look at what the Vysper guys are doing http://mina.apache.org/vysper/ 我建议你看看Vysper的人在做什么http://mina.apache.org/vysper/

Answer 3

You have several problems with your code, not counting the stylistic one of not using a DOM before sending (which is a best practice in the XMPP world). 您的代码有几个问题，不计算在发送之前不使用DOM的风格（这是XMPP世界中的最佳实践）。

You need to connect to "talk.l.google.com". 您需要连接到“talk.l.google.com”。 See the results of "dig +short _xmpp-client._tcp.gmail.com SRV" on the command line to find out what servers to connect to. 在命令行上查看“dig + short _xmpp-client._tcp.gmail.com SRV”的结果，找出要连接的服务器。
In your XML prolog, you're double escaping the single quotes, which will actually send a backslash. 在您的XML序言中，您将双重转义单引号，实际上会发送反斜杠。
The to attribute in your stream:stream should be "gmail.com", without the port number. 你的流中的to属性：stream应该是“gmail.com”，没有端口号。

All of that being said, I'll second the other posters with a plea for you to not start another Java client library, but to pitch in on an existing one. 所有这一切，我会在其他海报上请求你不要启动另一个Java客户端库，而是投入一个现有的。

Answer 4

Why are you writing an XML version before writing the stream stanza? 为什么在编写流节之前编写XML版本？ The server is expecting a stream of defined format, and not an XML structure. 服务器期望定义格式的流，而不是XML结构。 Remove this line 删除此行

"out.println("< ? xml version=\\'1.0\\' encoding=\\'utf-8\\' ?>")"

then it will work for sure. 然后它肯定会起作用。

如何在java中连接到gtalk？

问题描述

4 个解决方案

解决方案1
2 已采纳 2010-09-03 19:43:49

解决方案2
0 2010-09-03 20:59:19

解决方案3
0 2010-09-13 03:28:54

解决方案4
0 2012-02-15 18:55:49

如何在java中连接到gtalk？

问题描述

4 个解决方案

解决方案1 2 已采纳 2010-09-03 19:43:49

解决方案2 0 2010-09-03 20:59:19

解决方案3 0 2010-09-13 03:28:54

解决方案4 0 2012-02-15 18:55:49

解决方案1
2 已采纳 2010-09-03 19:43:49

解决方案2
0 2010-09-03 20:59:19

解决方案3
0 2010-09-13 03:28:54

解决方案4
0 2012-02-15 18:55:49