javascript - socket.io 在回调中获取套接字

Question

我正在为 node.js 使用 socket.io。如果您添加这样的事件处理程序:

io = require('socket.io')(http);
io.on('connect',function(socket){
    socket.on('some event',function(arg1,arg2){
       /// using socket to emit events for example
    }
}

然后我可以在“某些事件”的回调中访问套接字但是，如果我这样使用它呢

io = require('socket.io')(http);
io.on('connect',function){
    socket.on('some event',myfunction);
}

function myFunction(arg1,arg2)
{
    //I want to use calling socket here.
}

在后一种情况下如何访问套接字？我需要套接字来获取 socket.id，这样我才能知道是谁调用了这个事件。谢谢

Answer 1

好吧，如果我明白你想做什么，你可以简单地:

io = require('socket.io')(http);
io.on('connect',function){
    socket.on('some event',myfunction);
}

function myFunction(arg1,arg2)
{
    var socketId = this.id; //here you go, you can refer the socket with "this"
}

这是我通常用来保持代码整洁的做法:

var on_potato = function(potatoData){

     var socket = this;
     var id = socket.id;

     //use potatoData and socket here
};

var on_tomato = function(tomatoData){

     var socket = this;
     var id = socket.id;

     //use tomatoData and socket here
};

var handleClientConnection = function (client) {

    client.on('potato', on_potato);
    client.on('tomato', on_tomato);
};

io.on('connection', handleClientConnection)