WebSocket server in Ruby

websocket-ruby.rb

# You need to first download em-websocket at https://github.com/igrigorik/em-websocket
# Then install the gem then name this file to "server.rb" and run it: "ruby server.rb"

# This is a combination of code from the example at http://www.igvita.com/2009/12/22/ruby-websockets-tcp-for-the-browser/
# and at http://jessedearing.com/nodes/4-pubsubbin-with-redis-eventmachine-and-websockets to publish to all connected sockets.

require 'em-websocket'

SOCKETS = []
EventMachine::WebSocket.start(:host => "127.0.0.1", :port => 8080) do |ws|

  ws.onopen do
    # When someone connects I want to add that socket to the SOCKETS array that
    # I instantiated above
    SOCKETS << ws
  end

  ws.onclose do
    # Upon the close of the connection I remove it from my list of running sockets
    SOCKETS.delete ws
  end

  ws.onmessage {
    |msg| ws.send "#{msg}"
    SOCKETS.each {|s| s.send msg}
  }

end