Introduction to Faye

Faye simple pub/sub messaging http://faye.jcoglan.com/

• Publish-subscribe messaging system • Based on the Bayeux protocol
• Servers/clients in Ruby and Javascript

npm install faye gem install faye

Server

var Faye = require('faye') var server = new Faye.NodeAdapter({ mount:
'/faye' }) server.listen(8000)

require 'faye' server = Faye::RackAdapter.new(:mount => '/faye') server.listen(8000)

Client

var Faye = require('faye') var client = new Faye.Client('http://localhost:8000/faye') //
subscribe to a channel client.subscribe('/messages', function(message) { console.log('We got a message: ' + message.text) }) // publish to a channel client.publish('/messages', { text: 'HAI!' })

require 'faye' require 'eventmachine' EM.run { client = Faye::Client.new('http://localhost:8000/faye') #
subscribe to a channel client.subscribe('/messages') do |message| puts message.inspect end # publish to a channel client.publish('/messages', { 'text' => 'HAI!' }) }

Example App

• Simple chat-room application • Sinatra • Faye

require 'sinatra' get '/' do erb :index end

'/faye' }) server.listen(8000)

<!DOCTYPE html> <html> <head> <title>Chattr</title> <link rel="stylesheet" href="chattr.css" type="text/css" media="screen"
/> </head> <body> <h1>Lets Chat...</h1> <ul id="chat"></ul> <form id="new_message" action="#" method="get" accept-charset="utf-8"> <input type="text" name="message" id="message" value="" /> <input type="submit" name="send" id="send" value="Send" /> </form> <script src="jquery.min.js" charset="utf-8"></script> <script src="http://localhost:8000/faye/client.js" charset="utf-8"></script> <script src="chattr.js" charset="utf-8"></script> </body> </html>

var client = new Faye.Client('http://localhost:8000/faye') // Publish a message... $('#new_message').bind('submit',function()
{ var now = new Date() var message = { content: $('#message').val(), timestamp: now.getHours() + ":" + now.getMinutes() } client.publish('/messages', message) $('#message').val('') return false }) // Subscribe to message feed... client.subscribe('/messages', function(message) { var str = '' str += '<li>' str += ' <span class="created_at">'+ message.timestamp +'</span>' str += ' '+ message.content str += '</li>' $('#chat').append(str) })

Server

Events • handshake • subscribe • unsubscribe • publish •
disconnect

'/faye' }) server.listen(8000) server.bind('handshake', function(client_id) { console.log("[handshake] - client: '"+ client_id +"'") }) server.bind('subscribe', function(client_id, channel) { console.log("[subscribe] - client: '"+ client_id +"', channel: '"+ channel +"'") }) server.bind('unsubscribe', function(client_id, channel) { console.log("[unsubscribe] - client: '"+ client_id +"', channel: '"+ channel +"'") }) server.bind('publish', function(client_id, channel, data) { console.log("[publish] - client: '"+ client_id +"', channel: '"+ channel +"'") console.log("[publish] - data:") console.log(data) }) server.bind('disconnect', function(client_id) { console.log("[disconnect] - client: '"+ client_id +"'") })

require 'faye' require 'logger' Faye::WebSocket.load_adapter('thin') faye = Faye::RackAdapter.new(:mount => '/faye',
:timeout => 25) log = Logger.new(STDOUT) log.level = Logger::INFO faye.bind(:handshake) do |client_id| log.info("[handshake] - client: '#{client_id}'") end faye.bind(:subscribe) do |client_id,channel| log.info("[subscribe] - client: '#{client_id}', channel: '#{channel}'") end faye.bind(:unsubscribe) do |client_id,channel| log.info("[unsubscribe] - client: '#{client_id}', channel: '#{channel}'") end faye.bind(:publish) do |client_id,channel,data| log.info("[publish] - client: '#{client_id}', channel: '#{channel}', data: '# {data.inspect}'") end faye.bind(:disconnect) do |client_id| log.info("[disconnect] - client: '#{client_id}'") end run faye

• Override default behaviour... • incoming() • outgoing() Extensions

Engines • Change the back-end... • faye-redis

var faye = require('faye') var faye_redis = require('faye-redis') var server
= new faye.NodeAdapter({ mount: '/faye', timeout: 25, engine: { type: faye_redis, host: 'localhost', port: 6379 } }) server.listen(8000)

require 'faye' require 'faye-redis' server = Faye::RackAdapter.new( :mount => '/faye',
:timeout => 25, :engine => { :type => Faye::Redis, :host => 'localhost', :port => 6379 } ) server.listen(8000)

Introduction to Faye

Introduction to Faye

Darren Oakley

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Transcript

Faye simple pub/sub messaging http://faye.jcoglan.com/

• Publish-subscribe messaging system • Based on the Bayeux protocol

npm install faye gem install faye

Server

var Faye = require('faye') var server = new Faye.NodeAdapter({ mount:

require 'faye' server = Faye::RackAdapter.new(:mount => '/faye') server.listen(8000)

Client

var Faye = require('faye') var client = new Faye.Client('http://localhost:8000/faye') //

<script type="text/javascript" src="http://localhost:8000/faye/client.js"></script> <script type="text/javascript"> var client = new Faye.Client('http://localhost:8000/faye')

require 'faye' require 'eventmachine' EM.run { client = Faye::Client.new('http://localhost:8000/faye') #

Example App

• Simple chat-room application • Sinatra • Faye

require 'sinatra' get '/' do erb :index end

var Faye = require('faye') var server = new Faye.NodeAdapter({ mount:

<!DOCTYPE html> <html> <head> <title>Chattr</title> <link rel="stylesheet" href="chattr.css" type="text/css" media="screen"

var client = new Faye.Client('http://localhost:8000/faye') // Publish a message... $('#new_message').bind('submit',function()

Demo

Server

Events • handshake • subscribe • unsubscribe • publish •

var Faye = require('faye') var server = new Faye.NodeAdapter({ mount:

require 'faye' require 'logger' Faye::WebSocket.load_adapter('thin') faye = Faye::RackAdapter.new(:mount => '/faye',

• Override default behaviour... • incoming() • outgoing() Extensions

Engines • Change the back-end... • faye-redis

var faye = require('faye') var faye_redis = require('faye-redis') var server

require 'faye' require 'faye-redis' server = Faye::RackAdapter.new( :mount => '/faye',