socket.io within express (connection tracking)

[Phil Daws]

Hello,

working my way through my first app and now attempting to emit and event back to the connected client through socket.io.  On the server side I have the following to capture the connecting clients IP address into an array (later I will create a unique ID on the client side as-well in-case they have two browser sessions open):

var connections = {};

io.sockets.on('connection', function(socket) {

  var client = socket.handshake.address;

  connections[client] = socket;

  logger('Connection from ' + client.address);

  socket.on('disconnect', function() {

    logger('Disconnection from ' + client.address);

  });

});

The connected client then performs an action, in this case attempts a file upload, for which I need to send a progress status so I tried the following:

app.post('/upload', function(request, response) {

  var ipAddress = request.connection.remoteAddress;

  logger('URL request came from: ' + ipAddress);

  var form = new formidable.IncomingForm(),

    files = [],

    fields = [];

  form.uploadDir = __dirname + '/uploads';  

  

  logger('Processing form');

  form

  

    .on('progress', function(bytesReceived, bytesExpected) {

      var progress = (bytesReceived / bytesExpected * 100).toFixed(2);

      var MB = (bytesExpected / 1024 / 1024).toFixed(1);     

      logger('Uploading ' + MB + 'MB (' + progress + '%)');

      connections[ipAddress].emit('status', { completed: progress });

    })

.....

when I run it through I receive the error "TypeError: Cannot call method 'emit' of undefined" when I upload a file.  My understanding was that the connections array would be holding the socket object and that is what I would emit against ?

All help gratefully received and appreciated.

--
Thanks, Phil

[Phil Daws]

Looks like I need to read, embrace and commit to memory http://www.danielbaulig.de/socket-ioexpress/ :)

--
Thanks, Phil

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