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ruby: websocket server and websocket client can't work
equire '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

require 'eventmachine'
require 'em-http-request'

EventMachine.run {
  http = EventMachine::HttpRequest.new("ws://localhost:8080").get :timeout => 0
  http.errback { puts "oops" }
  http.callback {
      puts "WebSocket connected!"
      http.send("Hello client")
  }

  http.stream { |msg|
      puts "Recieved: #{msg}"
      http.send "Pong: #{msg}"
  }
}

gem uninstall em-http-request --version="1.0.2"
 gem uninstall em-socksify --version "=0.2.0"     1.0.0.beta.4
 gem uninstall eventmachine --version "=1.0.0.beta.4"

gem install em-http-request --version "=0.3"
 gem install em-socksify --version "=0.1"
 gem install eventmachine --version "0.12.10"