windows客户端开发--xmpp协议gloox库

很多聊天室客户端都使用了xmpp协议。

这个协议被人们诟病很多，但是对于简单的消息传送还是有很大的使用价值的。

XMPP is the open standard for messaging and presence。

gloox is a popular library for the Extensible Messaging and Presence Protocol (XMPP), formerly known as Jabber.

所以写了一个简单的例子，如何使用gloox连接服务器，监听消息，以及如何应答。

首先是设置 MessageHandler:

class Bot : public MessageHandler {public:    Bot() {        JID jid("bot@localhost");        client = new Client( jid, "botpwd" );        connListener = new ConnListener();        client->registerMessageHandler( this );        client->registerConnectionListener(connListener);        client->connect(true);    }

这里我们创建了一个客户端，有ID和密码。

接下来，我们需要ConnectionListener就处理连接。
而ConnectionListener一定要registered with 客户端。这个一会再说。

现在是连接服务器，我们采用non-bloking的方式。

为了能够处理消息，我们要实现handleMessage方法：

virtual void handleMessage( const Message& stanza, MessageSession* session = 0 ) {    cout << "Received message: " << stanza << endl;    Message msg(stanza.subtype(), stanza.from(), "Tell me more about " + stanza.body() );    client->send( msg );}

这时候我们需要connectlisenner来处理连接，需要重写纯虚函数：

class ConnListener : public ConnectionListener {public:    virtual void onConnect() {        cout << "ConnListener::onConnect()" << endl;    }    virtual void onDisconnect(ConnectionError e) {        cout << "ConnListener::onDisconnect() " << e << endl;    }    virtual bool onTLSConnect(const CertInfo& info) {        cout << "ConnListener::onTLSConnect()" << endl;        return true;    }};

上面代码重要的是onTLSConnect()函数。

全部代码：

#include <iostream>#include <string>#include <gloox/client.h>#include <gloox/message.h>#include <gloox/messagehandler.h>#include <gloox/connectionlistener.h>using namespace std;using namespace gloox;ostream& operator<<(ostream& os, Message::MessageType type) {    switch (type) {        case Message::Chat:            os << "Chat";            break;        case Message::Error:            os << "Error";            break;        case Message::Groupchat:            os << "Groupchat";            break;        case Message::Headline:            os << "Headline";            break;        case Message::Normal:            os << "Normal";            break;        case Message::Invalid:            os << "Invalid";            break;        default:            os << "unknown type";            break;    }}ostream& operator<<(ostream& os, const Message& stanza) {    os << "type:'" << stanza.subtype() <<  "' from:'" << stanza.from().full() << "' body:'" << stanza.body() << "'";    return os;}class ConnListener : public ConnectionListener {public:    virtual void onConnect() {        cout << "ConnListener::onConnect()" << endl;    }    virtual void onDisconnect(ConnectionError e) {        cout << "ConnListener::onDisconnect() " << e << endl;    }    virtual bool onTLSConnect(const CertInfo& info) {        cout << "ConnListener::onTLSConnect()" << endl;        return true;    }};class Bot : public MessageHandler {public:    Bot() {        JID jid("bot@localhost");        client = new Client( jid, "botpwd" );        connListener = new ConnListener();        client->registerMessageHandler( this );        client->registerConnectionListener(connListener);        client->connect(true);    }    ~Bot() {        delete client;        delete connListener;    }    virtual void handleMessage( const Message& stanza, MessageSession* session = 0 ) {        cout << "Received message: " << stanza << endl;        Message msg(Message::Chat, stanza.from(), "Tell me more about " + stanza.body() );        client->send( msg );    }private:   Client* client;   ConnListener* connListener;};int main() {    Bot b;}