1 如何使用 websocket
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="ws.js"></script>
</head>
<body>
</body>
<script>
ws.init({
url: ""
// 后台接口地址
}).connect();
ws.onmessage = function(message) {
console.log("receive:" + message.data);
}
ws.onopen = function() {
this.send("adfa");
};
</script>
</html>
2.封装的ws.js
(function($) {
$.config = {
url: '', //链接地址
};
$.init=function(config) {
this.config = config;
return this;
};
/**
* 连接webcocket
*/
$.connect = function() {
var protocol = (window.location.protocol == 'http:') ? 'ws:' : 'wss:';
this.host = protocol + this.config.url;
window.WebSocket = window.WebSocket || window.MozWebSocket;
if(!window.WebSocket) { // 检测浏览器支持
this.error('Error: WebSocket is not supported .');
return;
}
this.socket = new WebSocket(this.host); // 创建连接并注册响应函数
this.socket.onopen = function() {
$.onopen();
};
this.socket.onmessage = function(message) {
$.onmessage(message);
};
this.socket.onclose = function() {
$.onclose();
$.socket = null; // 清理
};
this.socket.onerror = function(errorMsg) {
$.onerror(errorMsg);
}
return this;
}
/**
* 自定义异常函数
* @param {Object} errorMsg
*/
$.error = function(errorMsg) {
this.onerror(errorMsg);
}
/**
* 消息发送
*/
$.send = function(message) {
if(this.socket) {
this.socket.send(message);
return true;
}
this.error('please connect to the server first !!!');
return false;
}
$.close = function() {
if(this.socket != undefined && this.socket != null) {
this.socket.close();
} else {
this.error("this socket is not available");
}
}
/**
* 消息回調
* @param {Object} message
*/
$.onmessage = function(message) {
}
/**
* 链接回调函数
*/
$.onopen = function() {
}
/**
* 关闭回调
*/
$.onclose = function() {
}
/**
* 异常回调
*/
$.onerror = function() {
}
})(ws = {});
3.如何解决websocket 断连
方法一:
前端处理方式
在 this.socket.onopen 中添加定时器
this.socket.onopen = function() {
$.onopen();
setInterval(function(){
$.send("success");
},5000);
};
方法二:
后台处理方式 (后台在websocket这个接口中进行轮询,前端根据拿到的请求信息做判断)
在this.socket.onmessage 中做操作
this.socket.onmessage = function(message) {
// 服务器保持链接的心跳信息
if("Linking..."==message.data){
return true;
}
$.onmessage(message);
};