websocket++简单使用例子

前言

　　html5支持使用websocket协议与服务器保持一个长连接，方便双方互相传输数据，而且服务器也能主动发送信息给客户端，而在这之前使用HTTP是很难做到的。下面介绍使用C++实现的websocket++的简单使用。websocket++更详细介绍点此。

　　websocket++需要boost的支持，所以工程中需要包含boost的头文件和库。boost在VS中的如何使用参考此文章。

C++代码

 1 #include "stdafx.h"
 2 #include <iostream>
 3 
 4 using namespace std;
 5 
 6 #include <websocketpp/config/asio_no_tls.hpp>
 7 #include <websocketpp/server.hpp>
 8 
 9 typedef websocketpp::server<websocketpp::config::asio> WebsocketServer;
10 typedef WebsocketServer::message_ptr message_ptr;
11 
12 using websocketpp::lib::placeholders::_1;
13 using websocketpp::lib::placeholders::_2;
14 using websocketpp::lib::bind;
15 
16 void OnOpen(WebsocketServer *server, websocketpp::connection_hdl hdl)
17 {
18     cout << "have client connected" << endl;
19 }
20 
21 void OnClose(WebsocketServer *server, websocketpp::connection_hdl hdl)
22 {
23     cout << "have client disconnected" << endl;
24 }
25 
26 void OnMessage(WebsocketServer *server, websocketpp::connection_hdl hdl, message_ptr msg)
27 {
28     string strMsg = msg->get_payload();
29     cout << strMsg << endl;
30 
31     string strRespon = "receive: ";
32     strRespon.append(strMsg);
33 
34     server->send(hdl, strRespon, websocketpp::frame::opcode::text);
35 }
36 
37 int main()
38 {
39     WebsocketServer                    server;
40 
41     // Set logging settings
42     server.set_access_channels(websocketpp::log::alevel::all);
43     server.clear_access_channels(websocketpp::log::alevel::frame_payload);
44 
45     // Initialize ASIO
46     server.init_asio();
47 
48     // Register our open handler
49     server.set_open_handler(bind(&OnOpen, &server, ::_1));
50 
51     // Register our close handler
52     server.set_close_handler(bind(&OnClose, &server, _1));
53 
54     // Register our message handler
55     server.set_message_handler(bind(&OnMessage, &server, _1, _2));
56 
57     //Listen on port 2152
58     server.listen(8090);
59 
60     //Start the server accept loop
61     server.start_accept();
62 
63     //Start the ASIO io_service run loop
64     server.run();
65 
66     return 0;
67 }
View Code

Html代码

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <title>Testing websockets</title>
 5 </head>
 6 <body>
 7   <div>
 8     <input type="submit" value="Start" onclick="start()" />
 9   </div>
10   <div id="messages"></div>
11   <script type="text/javascript">
12     var webSocket =
13       new WebSocket('ws://localhost:8090');
14  
15     webSocket.onerror = function(event) {
16       onError(event)
17     };
18  
19     webSocket.onopen = function(event) {
20       onOpen(event)
21     };
22     
23     webSocket.onclose = function(event) {
24       onClose(event)
25     };
26  
27     webSocket.onmessage = function(event) {
28       onMessage(event)
29     };
30  
31     function onMessage(event) {
32       document.getElementById('messages').innerHTML
33         += '<br />' + event.data;
34     }
35  
36     function onOpen(event) {
37       document.getElementById('messages').innerHTML
38         = 'Connection established';
39     }
40     
41     function onClose(event) {
42       document.getElementById('messages').innerHTML
43         += '<br />disconnection';
44     }
45     function onError(event) {
46       alert(event.data);
47     }
48  
49     function start() {
50       webSocket.send('hello');
51       return false;
52     }
53   </script>
54 </body>
55 </html>
View Code

运行结果

 

 

posted @ 2016-05-30 15:04  qinwanlin  阅读(9291)  评论(0)  编辑  收藏  举报