YouYo!

WebSocket Wrapper for WS library

• Minimalist
• Dynamic Sub-Protocols
• Communication with Clients by 'Id'
• Some Security Options (Connections per ip, ...)
• Configurable Automatic Ping/Pong Handling

Getting Started

Installation

YouYo! is released on npm and can be installed using:

npm install youyo --save

YouYo is dependent on ws package.

Usage (Practice A)

1. Require: const YouYo = require('YouYo').
2. Createing a YouYo Definer Object:

var ydo = {
	// Definer Pattern:
	origins: ['appX','appY','file://'], // Optional
	portN : {
    	pathX: { 
    		protocolY: function(message, flags){
            	var yo = this; // YouYo Socket
                return xyz; // object, string, buffer
            }
    	}
    }
}

3. Initialize: var yoo = new YouYo(ydo);.
4. Ignite: yoo.go(); // Returns server(s) for each port

Sample: Broadcast Server

const YouYo = require('YouYo');
var yoo = new YouYo({
    80:{
        '/':{
            broadcast: function(message, flags){
                if( !flags.binary ) this.broadcast(message);
                var onlines = this.wss.clients.length;
                return 'Your Message Broadcasted to '+ onlines +' Users' ;
            }
        }
    }
});
yoo.cpip = 10; // connection per ip;
yoo.go();

Usage (Practice B)

1. Require: const YouYo = require('YouYo').
2. Createing a YouYo Server on port 'x' : var yoo = new YouYo(x); yoo.go();

Sample: Echo Server

const YouYo = require('YouYo');
var yoo = new YouYo(80);
yoo.on('message', function(yo, message, flags){
	if( !flags.binary ) yo.send(message);
    else yo.send(message.length + ' Bytes Binary Message Received.');
});
yoo.go();

For more detailed examples, please take a look at: [git-repo]/Examples

Api

Instance of YouYo (yoo):

• .go(): Ignition. Passes WS Server(s array) for each port. + each server has .broadcast() & .sendTo().
• .broadcastAll(data, options): to all clients of all servers (ports).
• .servers: Array of WS Servers.
• .timeout: Socket Timeout - Milliseconds (Default 5 Minutes)
• .mask: Mask data frames? (False)
• .compress: Compressing data frames? (False)
• .cpip: Connections per ip (3)
• .ppi: Automatic Ping/Pong intervals (Default: 1 minutes)
• .pol: At Least x Milliseconds Before Next Pong (Default: 1 Minutes)
• .pil: x Missed Pings Toleration Limit (2)
• .bpl: Max Bad Pings Limit >> client sends too much pings related to last pong and .pol (5)
• .dosLimit: After n Wrong Attempts >> Possibly attacker (3)
• .dosTimer: Delay for Next Handshake (after n wrong attempts) - Milliseconds (Default 1 Minutes)
• .freePath: Accept connection to any path? [Boolean]
• .origins = []; // accepted origins (Empty Array == Any)
• .secure [Boolean] true if req.connection.authorized or req.connection.encrypted should be set to verify client.
• Ws[s] Options:
  • .disableHixie // true;
  • .clientTracking // true;
  • .perMessageDeflate // true;
  • .maxPayload // Bytes - Default: 1MB

Instance of yo (YouYo socket):

• .send(data, options, cb) // options{mask, binary, compress [All Boolean] }
• .id Unique id in related server [setter/getter]
• .sendTo(user_id_in_server, data, option, cb)
• .broadcast(data, options) // to All Other Clients [of related server(port)]
• .broadcastPath(data, options) // to All Other Clients [of related path]
• .broadcastPrtcl(data, options) // to All Other Clients [of related path & protocol]
• .ws [this websocket]
• .wss [related server]
• .wss.broadcast(data, options) // to All Clients of server (port)
• .wss.sendTo(user_id_in_server, data, option, cb)

Events

Instance of YouYo is Event Emitter:

• established: Socket Connection Established. Passes socket yo.
• signed: Socket id had been set. Passes id and socket yo.
• message: Recived data is ready to use. passes socket yo, data & flags (binary[boolean], masked[boolean], buffer).
• closed: Socket's completely closed; Destroyed. passes related server, socket id, status code & message.
• server-error: passes error and websocket-server (istance of wss).
• socket-error: passes error and socket yo.