特定のsocket.idにのみメッセージを送信するにはどうすればよいですか？

Question

私はゆっくりとプロジェクトの構造を設定しています。また、pingソース以外のすべてのユーザーに警告を送ることができますが、特定のユーザーに警告を送る必要があります。私はこれを行う最善の方法は特定のsocket.idにpingすることだと仮定します。どのようにこれを行うにはどのようなアイデア？私はエラーが発生し続けるので、socket.broadcast.to（socket.id）がセットアップで動作しないように見えます（未定義の 'to'プロパティを読み取れません）。

client.js

// BROWSERIFY 

//DEPENDENCIES 
var P2P = require("socket.io-p2p"); 
var io = require("socket.io-client"); 
var ss = require("socket.io-stream"); 
var socket = io(); 
var opts = { autoUpgrade: true, peerOpts: { numClients: 10 } }; 
var p2p = new P2P(socket, opts); 
var $ = require("jquery"); 




//Handler for the ping button 

var pingRoom = function() { 
    socket.emit('pingAlert'); 
}; 

window.pingRoom = pingRoom; 


var pingTwo = function() { 
    socket.emit('pingAlertTwo'); 
}; 

window.pingTwo = pingTwo; 



//////////////////////////////////////////////////////// 


//Intercepts the pingBack event from the server side 
socket.on('pingBack', function (data) { 
    alert("ALERT"); 
}); 

socket.on('pingBackTwo', function (data) { 
    socket.broadcast.to(socketid).emit('message', 'for your eyes only'); 

}); 
//////////////////////////////////////////////////////// 


//Peer number counter (incomplete functionality) 
p2p.on("peer-num", function (num) { 
    console.log("You are peer number " + num); 
    $(".peerNum").html("You are connected to " + num + " peers."); 
}); 
//////////////////////////////////////////////////////// 


//Appends stream to element 
p2p.on("file", function (stream) { 
    //console.log(stream); 

    var img = document.createElement("img"); 
    img.src = (window.URL || window.webkitURL).createObjectURL(new Blob(stream)); 
    document.getElementById("receivedImages").appendChild(img); 
}); 
//////////////////////////////////////////////////////// 


//Converts file to binary stream and logs progress in the console 
$(function() { 
    $("#file").change(function (e) { 
    ss.forceBase64 = true; 
    var file = e.target.files[0]; 
    var stream = ss.createStream(); 

    ss(socket).emit("file", stream, { size: file.size, name: file.name }); 
    var blobStream = ss.createBlobReadStream(file); 
    var size = 0; 
    blobStream.on("data", function (chunk) { 
     size += chunk.length; 
     console.log(Math.floor(size/file.size * 100) + "%"); 
    }); 
    blobStream.pipe(stream); 
    }); 
}); 
//////////////////////////////////////////////////////// 


//Logs users in the user log 
socket.on('users_log', function (data) { 
    $('#log').append(data + "<br>"); 
    console.log(data); 
}); 
//////////////////////////////////////////////////////// 

server.js

//DEPENDENCIES 
var app = require("express")(); 
var express = require("express"); 
var server = require("http").Server(app); 
var p2pserver = require("socket.io-p2p-server").Server; 
var io = require("socket.io")(server); 
var ss = require("socket.io-stream"); 
var path = require("path"); 


//Added configuration 
app.use(express.static(__dirname)); 
app.use(express.static("server_scripts")); 
app.use(express.static("client_scripts")); 
io.use(p2pserver); 


//Peer number 
var peerNum = 0; 
//////////////////////////////////////////////////////// 

//Connections and disconnections 
io.on("connection", function (socket) { 

    //Increments the peer number for connected peers 
    console.log("Peer " + peerNum + " connected"); 
    io.emit("peer-num", peerNum); 
    peerNum++; 
    //////////////////////////////////////////////////////// 


    //Streamer 
    ss(socket).on("file", function (stream, data) { 

    var filename = path.basename(data.name); 

    var parts = []; 

    stream.on("data", function (data) { 
     parts.push(data); 
    }); 

    stream.on("end", function() { 
     socket.broadcast.emit("file", parts); 
    }); 

    }); 
    //////////////////////////////////////////////////////// 


    //Holds the socket.id of connections 
    ID = socket.id; 
    //////////////////////////////////////////////////////// 


    //Emits connection status to user end (User ID log) 
    io.sockets.emit('users_log', "client id - " + ID + " connected"); 
    io.sockets.emit('users_online', ID); 
    //////////////////////////////////////////////////////// 


    //Server side logging of connections 
    console.log('client id - ' + ID + ' connected.'); 
    //////////////////////////////////////////////////////// 


    //Alert listener and response 
    socket.on('pingAlert', function() { 
    console.log('Ping'); 
    io.sockets.emit('pingBack'); 
    }); 


    socket.on('pingAlertTwo', function() { 
    console.log('PingTwo'); 
    io.sockets.emit('pingBackTwo'); 
    }); 
    //////////////////////////////////////////////////////// 


    //Handles disconnections 
    socket.on('disconnect', function() { 


    //Emits disconnection to user end (User ID log) 
    io.sockets.emit('users_log', "client id - " + ID + " disconnected"); 
    //Decreases peer counter on disconnect 
    peerNum--; 
    //////////////////////////////////////////////////////// 


    //Server side logging of disconnections 
    console.log('client id - ' + ID + ' disconnected.') 
    io.sockets.emit('users_offline', ID); 
    //NOTE: Features need to be added here 
    //////////////////////////////////////////////////////// 
    }) 
}); 


//Listen on 
server.listen(8000, function() { 
    console.log("Listening on 8000") 
}); 

Answer 1

io.sockets.connected[ID].emit('ping',data); 

IDはsocketIdです。データはイベントとともに送信するペイロードです。

Answer 2

あなたはio.function()イベントは、すべてのユーザーのために放出されていますが、socket.function()を書いた場合、イベントはその特定のソケットのために放出されるの書き込み。

特定のユーザーにメッセージを送信する場合は、socket.emit()機能を使用してください。