sinatra-websocketio

WebSocket component for Sinatra RocketIO

• Node.js like WebSocket I/O plugin for Sinatra
• https://github.com/shokai/sinatra-websocketio
• https://github.com/shokai/sinatra-websocketio/wiki
• Handle 10K+ clients on 1 process

Installation

% gem install sinatra-websocketio

Requirements

• Ruby 1.8.7 or 1.9.2 or 1.9.3 or 2.0.0
• Sinatra 1.3.0+
• EventMachine
• jQuery

Usage

Server --(WebSocket)--> Client

Server Side

require 'sinatra'
require 'sinatra/websocketio'
set :websocketio, :port => 9000

run Sinatra::Application

io = Sinatra::WebSocketIO

io.push :temperature, 35  # to all clients
io.push :light, {:value => 150}, {:to => session_id} # to specific client

Client Side

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="<%= websocketio_js %>"></script>

var io = new WebSocketIO().connect();
io.on("temperature", function(value){
  console.log("server temperature : " + value);
}); // => "server temperature : 35"
io.on("light", function(data){
  console.log("server light sensor : " + data.value);
}); // => "server light sensor : 150"

Client --(WebSocket)--> Server

Client Side

io.on("connect", function{
  io.push("chat", {name: "shokai", message: "hello"}); // client -> server
});

Server Side

io.on :chat do |data, session|
  puts "#{data['name']} : #{data['message']}  <#{session}>"
end
## => "shokai : hello  <12abcde345f6g7h8ijk>"

On "connect" Event

Client Side

io.on("connect", function(session){
  alert("connect!!");
});

io.on("disconnect", function(){
  alert("disconnected");
});

Server Side

io.on :connect do |session|
  puts "new client <#{session}>"
  io.push :hello, "hello!!"
end

io.on :disconnect do |session|
  puts "client disconnected <#{session}>"
end

On "error" Event

Client Side

io.on("error", function(err){
  console.error(err);
});

Server Side

io.on :error do |e|
  STDERR.puts e
end

Remove Event Listener

Server Side

event_id = io.on :chat do |data, from|
  puts "#{data} - from#{from}"
end
io.removeListener event_id

or

io.removeListener :chat  # remove all "chat" listener

Client Side

var event_id = io.on("error", function(err){
  console.error("WebSocketIO error : "err);
});
io.removeListener(event_id);

or

io.removeListener("error");  // remove all "error" listener

Config

set :websocketio, :port => 9000

or

% WS_PORT=9000 rackup config.ru

Sample App

chat app

• https://github.com/shokai/sinatra-websocketio/tree/master/sample

Test

% gem install bundler
% bundle install

start server

% rake test_server

run test

% rake test

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request