Building realtimewebslide

rows = database.fetch(category = 'news')
template = read_file('homepage.html')
json = fetc_url('http://.../')

database.fetch(category = 'news', callback)
read_file('homepage.html', callback)
fetc_url('http://.../', callback)

Friday, 27 August 2010

Benefits
1. Less overhead
1. Not releasing connection = good to share state within a session


http://blog.new-bamboo.co.uk/2009/12/14/pushing-the-boundary-of-real-time-web-with-t witter-and-xfactor


By Hiroshi Ichikawa

Remy Sharp just made iPhone PhoneGap version for 75
(remy)


Matz and Ryan Dahli


require 'em-websocket'

EventMachine::WebSocket.start(:host => "0.0.0.0", :port => 8080) do |ws|
ws.onopen { ws.send "Hello Client!"}
ws.onmessage { |msg| ws.send "Pong: #{msg}" }
ws.onclose { puts "WebSocket closed" }
end

em-websocket = Illya Grigorik


rev-websocket = sadayuki furuhashi
cramp = Pratik Naik
rainbows - sunshowers = Eric Wong
em-websocket-proxy = Matt Colyer
web-socket-ruby = Hiroshi Ichikawa


(Alex MacCaw’s fork has 76 support for Cramp)


http://bit.ly/9tKdeK

http://github.com/makoto/wsbench

This is example of using 2 small size ec2 instance, making 5000 ~ 20000 number of connections , send 1 message to distribute to all
connections, and majored the average of how long it took to be delivered to each connection (DRAFT 75 ONLY)


http://eiga.com/movie/44107/goods/t142030853/


IMPORTANT : You can synchronise data from
client to ser ver by saving before hitting Pusher


http://screenr.com/NJ0


server = new Pusher(Pusher.key, Pusher.channel);

server.bind('note-create', function(note) {
generateNote(note);
});

post '/notes.json' do
content_type 'text/json', :charset => 'utf-8'
n = Note.new(params[:note])
n.save
Pusher[CHANNEL].trigger('note-create', n.to_json)
end
We enhanced WebSocket by adding channel and event


http://www.flickr.com/photos/amy_ng/1692424006/sizes/m/


http://screenr.com/B5O


class PusherController < ApplicationController
def auth
response = Pusher[params[:channel_name]].authenticate(params[:socket_id], {
:user_id => current_user.id,
:user_info => {
:name => current_user.username
}
})
render :json => response
else
render :text => "Not authorized", :status => '403'
end
end
end

http://github.com/makoto/rubykaigi/tree/presence


jQuery(function(){
var server = new Pusher('#{Pusher.key}');
var myPresenceChannel = server.subscribe('presence#{pusher_presense_channel}')

myPresenceChannel.bind('pusher:subscription_succeeded', function(member_list){
updatePresence(member_list);
})

myPresenceChannel.bind('pusher:member_added', function(member){
updatePresence(myPresenceChannel.members());
})

myPresenceChannel.bind('pusher:member_removed', function(member){
updatePresence(myPresenceChannel.members());
})
});
http://github.com/makoto/rubykaigi/tree/presence


@connections = {} # How do you scale beyond one process?
EM.run {
EM::WebSocket.start(:host => "0.0.0.0",:port =>3001)do|ws|
ws.onopen {
puts "WebSocket connection open"
@connections[ws.id] = ws
}
ws.onclose { @connections.delete(ws.id)}
ws.onmessage { |data|
@connections.each do |k, v|
v.send(data) unless v.id == ws.id
end
}
end
}


CC
WS API
C

CC
WS API
C

CC
WS API
C


http://www.infoq.com/articles/Web-Sockets-Proxy-Ser vers


http://naun.blog118.fc2.com/


Building realtimewebslide

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Building realtimewebslide