wx.connectSocket({
 url:"test.php",
 data:{
 x:"",
 y:""
 },
 header:{ 
 'content-type': 'application/json'
 },
 method:"GET"
})

wx.connectSocket({
 url:"test.php"
});
wx.onSocketOpen(function(res){
 console.log("WebSocket连接已打开！")
})

wx.connectSocket({
 url:"test.php"
});
wx.onSocketOpen(function(res){
 console.log("WebSocket连接已打开！")
})
wx.onSocketError(function(res){
 console.log("WebSocket连接打开失败，请检查！")
})

var socketOpen = false;
var socketMsgQueue = []
wx.connectSocket({
 url:"test.php"
});

wx.onSocketOpen(function(res){
 socketOpen = true;
 for(var i = 0 ; i < socketMsgQueue.length; i++){
  sendSocketMessage(socketMsgQueue[i])
 }
 socketMsgQueue = [];
})

function sendSocketMessage(msg){
 if(socketOpen){
 wx.sendSocketMessage({
  data:msg
 });
 }else{
  socketMsgQueue.push(msg)
 }
}

wx.connectSocket({
 url:"test.php"
});

wx.onSocketMessage(function(res){
 console.log("收到服务器内容：" + res.data)
})

wx.connectSocket({
 url:"test.php"
});

//注意这里有时序问题，
//如果wx.connectSocket还没回调wx.onSocketOpen,而先调用wx.closeSocket,那么就做不到关闭WebSocket的目的
//必须在WebSocket打开期间调用wx.closeSocket才能关闭
wx.onSocketOpen(function(){
 wx.closeSocket()
})

wx.onSocketClose(function(res){
 console.log("WebSocket 已关闭！")
})