websocket 断线重连解决方案

发表于 2017年08月02日
javascript

websocket是HTML5下一个不错的网络协议解决方案，有一个场景很多猿猿都会遇到，手机锁屏后大约60秒，IOS会自动断开websocket连接，连接丢失了，那我们的数据也就断了。websocket 断线重连方案如下：

目录表

ReconnectingWebSocket

reconnecting websocket是一个javascript封闭的websocket库，非常小，压缩后仅有3KB。它的功能是当websocket断线后自动帮你重连。使用方法很简单：

只要把

var ws = new WebSocket('ws://....');

1	var ws = new WebSocket('ws://....');

替换成

var ws = new ReconnectingWebSocket('ws://....');

1	var ws = new ReconnectingWebSocket('ws://....');

就行了，当websocket断开着它会帮你自动重连，socket永不断线！

它支持事件

onopen
onmessage
onmessage
onmessage
onclose // At this point the WebSocket instance is dead.

onopen

onmessage

onclose // At this point the WebSocket instance is dead.

websocket 断线重连原理实现

var ws = new WebSocket('ws:../../websocket');
ws.onmessage = function(msg){
    console.log('msg:',msg);
    //do something
};
ws.onclose = function(){
    console.log('closed....');
};

var ws = new WebSocket('ws:../../websocket');

ws.onmessage = function(msg){

console.log('msg:',msg);

//do something

};

ws.onclose = function(){

console.log('closed....');

};

实现websocket断线重连

var ws = new WebSocket('ws:../../websocket');
ws.onmessage = function(msg){
    console.log('msg:',msg);
    //do something
};
//把刚才干的事情重写一遍
function reconnect (){
    rews = new WebSocket('ws:../../websocket');
    rews.onmessage = function(){
      //dosomthing  
    };
    rews.onclose = function(){
        //dosomthing
    };
}
//每隔5秒去调用一次
var disConnect = function(){
    setTimeout(function(){
         reconnect();
    },5000);
}
//函数放在onclose里
ws.onclose = disConnect;