socket.io and node.js to send message to particular client

Question

Sending message to all client works well but I want to send message to particular username. my server.js file looks like. What it does is when http://localhost:8080

Answer 1

You have to store all client ids and according to that you have to get id of particular client and then you use following code

var store={};//this will store all client id and username e.g. store={jay:"34jhjshdj343sasa"}
socket.on('pmessage', function (data) {
    var receiverUserName=data.username;
    var message=data.message;
    var id = store[receiverUserName];//get ID
    // we tell the client to execute 'updatechat' with 2 parameters
    io.sockets.emit("pvt",socket.username,data+socket.username);
    io.sockets.socket(id).emit("pvt",socket.username,data+socket.username); 
});

Then this will emit on particular client

Answer 2

Try this:

socket.on('pmessage', function (data) {
    // we tell the client to execute 'updatechat' with 2 parameters
    io.sockets.emit("pvt",socket.username,data+socket.username);
    io.sockets.socket(socket.id).emit("pvt",socket.username,data+socket.username); 
});

socket.id is saved by socket.io and it contains unique id of your client. You can check that using this:

console.log(socket.id);