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monitor.io

remote monitoring and debugging for socket.io

  • 0.0.4
  • Source
  • npm
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monitor.io

Simple remote monitoring and debugging middleware for socket.io.

monitor.io

monitor.io is a module for Node.js that runs as a telnet server, giving a remote client control of and information about sockets connected to an instance of socket.io.

This makes it possible to disconnect, emit, or broadcast data to sockets in a remote terminal without interrupting the Node.js process running socket.io. monitor.ios also provides a real-time display of any data attached to a socket with the socket#monitor method.

Installation

$ npm install monitor.io

Usage

var socketio = require('socket.io')(server),
  monitorio = require('monitor.io');

socketio.use(monitorio({ port: 8000 })); // monitor.io started on port 8000

Use telnet to connect to monitor.io and control a real-time list of sockets connected to socket.io.

$ telnet myapp.com 8000

Use hjkl to scroll verticall/horizontally through the list of sockets, e to emit data to a specific socket, and b to broadcast data to all sockets.

Monitoring

monitor.io attaches a method named monitor to every socket object. This method attaches data to a socket and tells monitor.io to render this data in the monitor.io terminal window.

Here is an example of how to attach the time that a socket connected to socket.io:

io.on('connection', function(socket) {
  socket.monitor('timeConnected', Date.now());  
});

socket#monitor must be called whenever monitored information changes, such as the score of a player in a real-time game, to force a rerender in the monitor.io window.

socket.on('newHighScore', function(msg) {
  var score = msg.score;
  socket.monitor('highScore', msg.score);
});

The monitor method also accepts an object, and will display every key-value pair in an object.

socket.on('newPlayer', function(msg) {
  var newPlayer = game.createPlayer();
  socket.monitor(newPlayer); // every key-value pair in newPlayer will be shown in the monitor.io terminal window.
});

License

MIT

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Package last updated on 27 Oct 2014

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