Why doesn't my server respond to an emitted event by the client? I have tried a few trivial examples from the socket.io webpage and they seem to be working fine.

My goal is to emit an event whenever a user focuses out from the input box, pare the input value on the server, and fire an event back to the client.

client-side

$('#userEmail').focusout(function() {
  var value = $('#userEmail').val(); // gets email from the input field
  console.log(value); // prints to console (it works!)
  socket.emit('emailFocusOut', { userEmail: value }); // server doesn't respond to this
});

server-side

io.sockets.on 'emailFocusOut', (data) ->
  console.log(data)

Additional info

• express 3.0rc4
• socket.io 0.9.10
• coffee-script 1.3.3

Why doesn't my server respond to an emitted event by the client? I have tried a few trivial examples from the socket.io webpage and they seem to be working fine.

My goal is to emit an event whenever a user focuses out from the input box, pare the input value on the server, and fire an event back to the client.

client-side

$('#userEmail').focusout(function() {
  var value = $('#userEmail').val(); // gets email from the input field
  console.log(value); // prints to console (it works!)
  socket.emit('emailFocusOut', { userEmail: value }); // server doesn't respond to this
});

server-side

io.sockets.on 'emailFocusOut', (data) ->
  console.log(data)

Additional info

• express 3.0rc4
• socket.io 0.9.10
• coffee-script 1.3.3

• javascript
• node.js
• express
• websocket
• socket.io

• Can you post in the log that displays on your browser's Console (in Chrome)? – Omkar Khair Commented Sep 30, 2012 at 8:20
• @Omkar: When I "focus out" from the e-mail input I get this printed in the console: [email protected] custom.js:47. But nothing happens on the Node.js console. – Sahat Yalkabov Commented Sep 30, 2012 at 19:26

2 Answers 2

You have to put your custom event inside the io.sockets.on function. The following code will work:

io.sockets.on('connection', function (socket) {  
  socket.on("emailFocusOut", function(data) {
    console.log(data) // results in: { userEmail: 'awesome' }
  })
});

If you need some answer from server your server should emit message back to client.
console.log does not do network answer.

var io = require('socket.io').listen(80);

io.sockets.on('connection', function(socket) {
    socket.on('emailFocusOut', function(data) {
        data.receivedAt = Date.now();
        socket.emit('emailFocusOutResponse', data); // answer back
    });
});

Then on client you can listen for 'emailFocusOutResponse' and handle this message.