NodeJS Websocket时间响应式改造为同步式通信

• 使用示范

send发送后会同步返回发送后服务器的响应消息

• 依赖

1. websocket

安装websocket：npm install websocket
安装过程可能需要你安装python vs等如果报错看报错信息把需要的依赖安装即可

• 组件代码

const WebSocketClient = require('websocket').client;
/*
连接websocket
 */
let connect=function(url){
    return new Promise((resolve => {
        //建立连接
        let client = new WebSocketClient();
        //连接失败
        client.on('connectFailed', function(error) {
            console.log('Connect Error, ' + error.toString());
        });
        //开始连接
        client.on('connect', function(connection) {
            console.log('开始连接'+url);
            connection.on('error', function(error) {
                console.log("连接错误 " + error.toString());
            });
            connection.on('close', function() {
                console.log('连接关闭');
            });
            connection.on('message', function (message) {
                connection.resolveFunc(message)
            });
            if (connection.connected) {
                console.log('websocket连接已建立')
                resolve(connection)
            }
        });
        client.connect(url)
    }))
}
/*
发送消息并获得结果
 */
let send=function (conn,msg) {
    return new Promise((resolve => {
        conn.sendUTF(msg)
        conn.resolveFunc=resolve
    }))
}
/*
关闭连接
 */
let close=function(conn){
    conn.close()
}
module.exports={
    connect:connect,
    send:send,
    close:close
}

• 调用代码

const util=require('./AsyncWebsocketUtil')
async function main() {
    let conn=await util.connect('wss://api.yourhost.pr/ws')
    let respMsg=await util.send(conn,'1')
    console.log(respMsg)
}
main()