vc websocket简单测试

websocket可用于网页和vc程序进行交互，websocket需要opensll、boost库支持，所以需要先将以上两样下载配置好，然后下载websocket源码。

这里以下载的websocketpp-0.7.0\examples\echo_server为例子，在vs2013中新建一个win32程序，将echo server的代码拷贝到当前工程。

#include <websocketpp/config/asio_no_tls.hpp>

#include <websocketpp/server.hpp>

#include <iostream>

typedef websocketpp::server<websocketpp::config::asio> server;

using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;

// pull out the type of messages sent by our config
typedef server::message_ptr message_ptr;

// Define a callback to handle incoming messages
void on_message(server* s, websocketpp::connection_hdl hdl, message_ptr msg) {
    std::cout << "on_message called with hdl: " << hdl.lock().get()
              << " and message: " << msg->get_payload()
              << std::endl;

    // check for a special command to instruct the server to stop listening so
    // it can be cleanly exited.
    if (msg->get_payload() == "stop-listening") {
        s->stop_listening();
        return;
    }

    try {
        s->send(hdl, msg->get_payload(), msg->get_opcode());
    } catch (const websocketpp::lib::error_code& e) {
        std::cout << "Echo failed because: " << e
                  << "(" << e.message() << ")" << std::endl;
    }
}

int main() {
    // Create a server endpoint
    server echo_server;

    try {
        // Set logging settings
        echo_server.set_access_channels(websocketpp::log::alevel::all);
        echo_server.clear_access_channels(websocketpp::log::alevel::frame_payload);

        // Initialize Asio
        echo_server.init_asio();

        // Register our message handler
        echo_server.set_message_handler(bind(&on_message,&echo_server,::_1,::_2));

        // Listen on port 9002
        echo_server.listen(9002);

        // Start the server accept loop
        echo_server.start_accept();

        // Start the ASIO io_service run loop
        echo_server.run();
    } catch (websocketpp::exception const & e) {
        std::cout << e.what() << std::endl;
    } catch (...) {
        std::cout << "other exception" << std::endl;
    }
}

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会有些报错，需要在项目属性–》配置属性–》VC++目录中设置好以下包含目录和库目录。
在这里插入图片描述

通过写一份html来调用：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</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:9002');
		
		webSocket.onerror = function(event){
			onError(event)
		};
		webSocket.onopen = function(event){
			onOpen(event)
		};
		webSocket.onmessage = function(event){
			onMessage(event)
		};
		
		function onMessage(event){
			document.getElementById('messages').innerHTML
				+= '<br />Get Message From Server: ' + event.data;
		}
		function onOpen(event){
			document.getElementById('messages').innerHTML
				= 'Connection established';
		}
		function onError(event){
			alert(event.data);
			alert("error");
		}
		function start(){
			webSocket.send('hello');
			return false;
		}
	</script>
</body>
</html>
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先运行vc程序，然后运行html，成功连接并发送消息。
在这里插入图片描述

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原文地址：https://blog.csdn.net/bangtanhui/article/details/125498219