Class: SockJS::Transports::WebSocket

Inherits:
ConsumingTransport show all
Defined in:
lib/sockjs/transports/websocket.rb

Direct Known Subclasses

RawWebSocket

Instance Attribute Summary

Attributes inherited from Endpoint

#connection, #options

Attributes included from Endpoint::ClassMethods

#method, #prefix

Instance Method Summary collapse

Methods inherited from ConsumingTransport

#closing_frame, #get_session, #heartbeat_frame, #messages_frame, #opening_frame, #request_closed

Methods inherited from SockJS::Transport

#exception_response, #handle_session_unavailable, #request_data, #response_beginning, #server_key

Methods inherited from SessionEndpoint

routing_prefix

Methods inherited from Endpoint

#call, #empty_string, #error_content_type, #handle, #handle_http_error, #initialize, #inspect, #response_class, #setup_response

Methods included from Endpoint::ClassMethods

#add_route, #add_routes, #endpoints, #register, #route_conditions, #routing_prefix

Constructor Details

This class inherits a constructor from SockJS::Endpoint

Instance Method Details

#build_error_response(request) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 82

def build_error_response(request)
  response = response_class.new(request)
end

#build_response(request) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 72

def build_response(request)
  SockJS.debug "Upgrading to WebSockets ..."

  web_socket = Faye::WebSocket.new(request.env)

  web_socket.extend(WSDebuggingMixin)

  return web_socket
end

#disabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sockjs/transports/websocket.rb', line 52

def disabled?
  !options[:websocket]
end

#extract_message(event) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 128

def extract_message(event)
  SockJS.debug "Received message event: #{event.data.inspect}"
  event.data
end

#finish_response(web_socket) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 124

def finish_response(web_socket)
  web_socket.close
end

#format_frame(response, frame) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 115

def format_frame(response, frame)
  frame.to_s
end

#handle_request(request) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 60

def handle_request(request)
  if not @options[:websocket]
    raise HttpError.new(404, "WebSockets Are Disabled")
  elsif request.env["HTTP_UPGRADE"].to_s.downcase != "websocket"
    raise HttpError.new(400, 'Can "Upgrade" only to "WebSocket".')
  elsif not ["Upgrade", "keep-alive, Upgrade"].include?(request.env["HTTP_CONNECTION"])
    raise HttpError.new(400, '"Connection" must be "Upgrade".')
  end

  super
end

#process_session(session, web_socket) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 86

def process_session(session, web_socket)
  #XXX Facade around websocket?

  web_socket.onopen = lambda do |event|
    begin
      session.attach_consumer(web_socket, self)
    rescue Object => ex
      SockJS::debug "Error opening (#{event.inspect[0..40]}) websocket: #{ex.inspect}"
    end
  end

  web_socket.onmessage = lambda do |event|
    begin
      session.receive_message(extract_message(event))
    rescue Object => ex
      SockJS::debug "Error receiving message on websocket (#{event.inspect[0..40]}): #{ex.inspect}"
      web_socket.close
    end
  end

  web_socket.onclose = lambda do |event|
    begin
      session.close
    rescue Object => ex
      SockJS::debug "Error closing websocket (#{event.inspect[0..40]}): #{ex.inspect}"
    end
  end
end

#send_data(web_socket, data) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 119

def send_data(web_socket, data)
  web_socket.send(data)
  return data.length
end

#session_key(ws) ⇒ Object 



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# File 'lib/sockjs/transports/websocket.rb', line 56

def session_key(ws)
  ws.object_id.to_s
end