前言
html5支持使用websocket協議與服務器保持一個長連接，方便雙方互相傳輸數據，而且服務器也能主動發送信息給客戶端，而在這之前使用HTTP是很難做到的。下面介紹使用C++實現的websocket++的簡單使用。websocket++更詳細介紹點此。
websocket++需要boost的支持，所以工程中需要包含boost的頭文件和庫。boost在VS中的如何使用參考此文章。
C++代碼
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#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代碼
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<!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> |
運行結果
以上這篇websocket++簡單使用及實例分析就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持服務器之家。
