Socket.io: How to limit the size of emitted data from client to the websocket server

Question

I have a node.js server with socket.io. My clients use socket.io to connect to the node.js server.

Data is transmitted from clients to server in the following way:

Answer 1

Well, I'll go with the Javascript side of the thing... let's say you don't want to allow users to go over a certain limit of data, you can just:

var allowedSize = 10;

Object.keys(Data).map(function( key, idx ) {
    if( idx > allowedSize ) return;
    // Do some work with Data[key]
});

this not only allows you to properly cycle through the elements of your object, it lets you limit easily. ( obviously this can also ruin your own pre-set requests )