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
#include "stdafx.h"
#include <iostream>
using namespace std;
#include <websocketpp/config/asio_no_tls.hpp>
#include <websocketpp/server.hpp>
typedef websocketpp::server<websocketpp::config::asio> WebsocketServer;
typedef WebsocketServer::message_ptr message_ptr;
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
void OnOpen(WebsocketServer *server, websocketpp::connection_hdl hdl)
{
cout << "have client connected" << endl;
}
void OnClose(WebsocketServer *server, websocketpp::connection_hdl hdl)
{
cout << "have client disconnected" << endl;
}
void OnMessage(WebsocketServer *server, websocketpp::connection_hdl hdl, message_ptr msg)
{
string strMsg = msg->get_payload();
cout << strMsg << endl;
string strRespon = "receive: ";
strRespon.append(strMsg);
server->send(hdl, strRespon, websocketpp::frame::opcode::text);
}
int main()
{
WebsocketServer server;
// Set logging settings
server.set_access_channels(websocketpp::log::alevel::all);
server.clear_access_channels(websocketpp::log::alevel::frame_payload);
// Initialize ASIO
server.init_asio();
// Register our open handler
server.set_open_handler(bind(&OnOpen, &server, ::_1));
// Register our close handler
server.set_close_handler(bind(&OnClose, &server, _1));
// Register our message handler
server.set_message_handler(bind(&OnMessage, &server, _1, _2));
//Listen on port 2152
server.listen(8090);
//Start the server accept loop
server.start_accept();
//Start the ASIO io_service run loop
server.run();
return 0;
}
Html代码
<!DOCTYPE html>
<html>
<head>
<title>Testing websockets</title>
</head>
<body>
<div>
<input type="submit" value="Start" onclick="start()" />
</div>
<div id="messages"></div>
<script type="text/javascript">
var webSocket =
new WebSocket('ws://localhost:8090');
webSocket.onerror = function(event) {
onError(event)
};
webSocket.onopen = function(event) {
onOpen(event)
};
webSocket.onclose = function(event) {
onClose(event)
};
webSocket.onmessage = function(event) {
onMessage(event)
};
function onMessage(event) {
document.getElementById('messages').innerHTML
+= '<br />' + event.data;
}
function onOpen(event) {
document.getElementById('messages').innerHTML
= 'Connection established';
}
function onClose(event) {
document.getElementById('messages').innerHTML
+= '<br />disconnection';
}
function onError(event) {
alert(event.data);
}
function start() {
webSocket.send('hello');
return false;
}
</script>
</body>
</html>
运行结果
以上这篇websocket++简单使用及实例分析就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持找一找教程网。
