WeChat Mini Program Network API Websocket Detailed Description-Mini Program Development-php.cn

WeChat Mini Program Network API Websocket Detailed Description

高洛峰

Release： 2017-03-13 11:43:14

Original

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This article mainlyintroduces the relevant information of the WeChat Mini Program NetworkAPI Websocket in detail. Friends in need can refer to

wx. connectSocket(OBJECT)

Create a WebSocket connection; a WeChat applet can only have one WebSocket connection at the same time. If a WebSocket connection currently exists, the connection will be automatically closed. and re-create a WebSocket connection.

OBJECT parameter description:

##Parameter TypeRequiredDescriptionurlYesDeveloper dataObjectNoRequested dataheaderObject NoHTTP HeadermethodStringNoThe default is GET, valid values are: OPTIONS, GET, HEAD, POST, PUT, successFunctionNoCallback function for successful interface callfailcompleteSample code:


	String		ServiceServerInterfaceThe address must be HTTPS protocol, and the domain name must be the legal domain name configured in the background


			DELETE, TRACE, CONNECT

Function	No	Interface The callback function that failed to call
Function	No	The callback function that ends the interface call (either successful or failed) Execution)

wx.connectSocket({
 url:"test.php",
 data:{
 x:"",
 y:""
 },
 header:{ 
 &#39;content-type&#39;: &#39;application/json&#39;
 },
 method:"GET"
})

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wx.onSocke

tOpen(CALLBACK)Listen to WebSocket connection opening

Event

Sample code:

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

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wx.onSocketError(CALLBACK)

Listen for WebSocket errors

Sample code:

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！")
})

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wx.s

endSocketMessage(OBJECT)To send data through a WebSocket connection, you need to first wx.connectSocket, and can only be sent after wx.onSocketOpen callback.

OBJECT parameter description:

ParameterdataSample code:

Type	Required	Description
String	is the content that	needs to be sent

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)
 }
}

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wx.onSocketMessage(CALLBACK)

Listening to WebSocket received Server message event

CALLBACK return parameters:

ParametersTypeDescriptiondataStringMessage returned by the serverSample code:

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

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

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wx.closeSocket()

Close WebSocket connection

wx.onSocketClose(CALLBACK)

Listen for WebSocket close

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！")
})

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