如何从Socket.io中的事件获取套接字ID? [英] How can I get the socket ID from an event in Socket.io?

问题描述

我想知道哪个客户端在服务器上到达时发送了事件.例如:

I want to know which client sent an event when it arrives on the server. For example:

var socket = require(socket.io')(port);

socket.on("ask question", function(data){
    var socketid = // ?

    //respond to sender
    socket.sockets.connected[socketid].emit("Here's the answer");
});

如何获取事件发送者的套接字ID?

How can I get the socket ID of the event sender?

推荐答案

您的服务器端逻辑有些偏离.客户端连接，这是显示客户端套接字的位置，也是您侦听特定客户端事件的位置.通常，它看起来像这样:

Your server-side logic is a bit off. The client connects and that's where the client socket is revealed and that's where you listen to events from a particular client. Usually, it would look like this:

var io = require("socket.io")(port);

io.on('connection', function (socket) {
    socket.on('ask question', function (data) {
        // the client socket that sent this message is in the
        // socket variable here from the parent scope
        socket.emit("Here's the answer");
    });
});

这在socket.io docs 此处中显示.

This is shown in the socket.io docs here.

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