Class: Faye::Transport::WebSocket

Inherits:
Transport
  • Object
show all
Includes:
Deferrable
Defined in:
lib/faye/transport/web_socket.rb

Defined Under Namespace

Classes: Request

Constant Summary collapse

UNCONNECTED = 
1
CONNECTING = 
2
CONNECTED = 
3
PROTOCOLS = 
{
  'http'  => 'ws',
  'https' => 'wss'
}

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Deferrable

#set_deferred_status

Class Method Details

.create(dispatcher, endpoint) ⇒ Object 



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# File 'lib/faye/transport/web_socket.rb', line 27

def self.create(dispatcher, endpoint)
  sockets = dispatcher.transports[:websocket] ||= {}
  sockets[endpoint.to_s] ||= new(dispatcher, endpoint)
end

.usable?(dispatcher, endpoint, &callback) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faye/transport/web_socket.rb', line 23

def self.usable?(dispatcher, endpoint, &callback)
  create(dispatcher, endpoint).usable?(&callback)
end

Instance Method Details

#batching? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faye/transport/web_socket.rb', line 32

def batching?
  false
end

#close ⇒ Object 



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# File 'lib/faye/transport/web_socket.rb', line 124

def close
  return unless @socket
  @socket.close
end

#connect ⇒ Object 



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# File 'lib/faye/transport/web_socket.rb', line 58

def connect
  @state ||= UNCONNECTED
  return unless @state == UNCONNECTED
  @state = CONNECTING

  url        = @endpoint.dup
  headers    = @dispatcher.headers.dup
  extensions = @dispatcher.ws_extensions
  cookie     = get_cookies

  url.scheme = PROTOCOLS[url.scheme]
  headers['Cookie'] = cookie unless cookie == ''

  options = {
    :extensions => extensions,
    :headers    => headers,
    :proxy      => @proxy,
    :tls        => @dispatcher.tls
  }

  socket = Faye::WebSocket::Client.new(url.to_s, [], options)

  socket.onopen = lambda do |*args|
    store_cookies(socket.headers['Set-Cookie'])
    @socket = socket
    @state = CONNECTED
    @ever_connected = true
    set_deferred_status(:succeeded, socket)
  end

  closed = false
  socket.onclose = socket.onerror = lambda do |*args|
    next if closed
    closed = true

    was_connected = (@state == CONNECTED)
    socket.onopen = socket.onclose = socket.onerror = socket.onmessage = nil

    @socket = nil
    @state = UNCONNECTED

    pending  = @pending ? @pending.to_a : []
    @pending = nil

    if was_connected or @ever_connected
      set_deferred_status(:unknown)
      handle_error(pending, was_connected)
    else
      set_deferred_status(:failed)
    end
  end

  socket.onmessage = lambda do |event|
    replies = MultiJson.load(event.data) rescue nil
    next if replies.nil?
    replies = [replies].flatten

    replies.each do |reply|
      next unless reply.has_key?('successful')
      next unless message = @pending.find { |m| m['id'] == reply['id'] }
      @pending.delete(message)
    end
    receive(replies)
  end
end

#request(messages) ⇒ Object 



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# File 'lib/faye/transport/web_socket.rb', line 42

def request(messages)
  @pending ||= Set.new
  messages.each { |message| @pending.add(message) }

  promise = Request.new

  callback do |socket|
    next unless socket and socket.ready_state == 1
    socket.send(Faye.to_json(messages))
    promise.succeed(socket)
  end

  connect
  promise
end

#usable?(&callback) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faye/transport/web_socket.rb', line 36

def usable?(&callback)
  self.callback { callback.call(true) }
  self.errback { callback.call(false) }
  connect
end