NodeJs 实现简单WebSocket 即时通讯
服务器的实现很简单,先装一个nodeJs的模块,叫nodejs-websocket , 直接在nodeJs命令行中敲入:npm install nodejs-websocket回车就可以安装好了,
然后就可以开始建立服务器了,因为有了nodejs-websocket模块,所以很多工作都不用我们自己做,直接调用别人封装好的方法就行了:
- 服务端代码
- 根据客户端传来的消息判断哪个是game1,哪个是game2,保存connection对象。
var ws = require("nodejs-websocket"); console.log("开始建立连接...") var game1 = null,game2 = null , game1Ready = false , game2Ready = false; var server = ws.createServer(function(conn){ conn.on("text", function (str) { console.log("收到的信息为:"+str) if(str==="game1"){ game1 = conn; game1Ready = true; conn.sendText("success"); } if(str==="game2"){ game2 = conn; game2Ready = true; } if(game1Ready&&game2Ready){ game2.sendText(str); } conn.sendText(str) }) conn.on("close", function (code, reason) { console.log("关闭连接") }); conn.on("error", function (code, reason) { console.log("异常关闭") }); }).listen(8001) console.log("WebSocket建立完毕")
【game1代码】:通过点击获取三个框的内容,传到服务器
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .kuang{text-align: center;margin-top:200px;} #mess{text-align: center} .value{width: 200px;height:200px;border:1px solid;text-align: center;line-height: 200px;display: inline-block;} </style> </head> <body> <div id="mess">正在连接...</div> <div class="kuang"> <div class="value" id="value1">小明小明</div> <div class="value" id="value2">啦啦啦</div> <div class="value" id="value3">小张小张</div> </div> <script> var mess = document.getElementById("mess"); if(window.WebSocket){ var ws = new WebSocket('ws://127.0.0.1:8001'); ws.onopen = function(e){ console.log("连接服务器成功"); ws.send("game1"); } ws.onclose = function(e){ console.log("服务器关闭"); } ws.onerror = function(){ console.log("连接出错"); } ws.onmessage = function(e){ mess.innerHTML = "连接成功" document.querySelector(".kuang").onclick = function(e){ var time = new Date(); ws.send(time + " game1点击了“" + e.target.innerHTML+"”"); } } } </script> </body> </html>
【game2代码】:获取服务推送来的消息,并且显示
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> .kuang{text-align: center;margin-top:200px;} #mess{text-align: center} </style> </head> <body> <div id="mess"></div> <script> var mess = document.getElementById("mess"); if(window.WebSocket){ var ws = new WebSocket('ws://127.0.0.1:8001'); ws.onopen = function(e){ console.log("连接服务器成功"); ws.send("game2"); } ws.onclose = function(e){ console.log("服务器关闭"); } ws.onerror = function(){ console.log("连接出错"); } ws.onmessage = function(e){ var time = new Date().t.toLocaleDateString(); mess.innerHTML+=time+"的消息:"+e.data+"<br>" } } </script> </body> </html>
运行截图:
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