Class: Faye::WebSocket::Draft75Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/faye/websocket/draft75_parser.rb

Direct Known Subclasses

Draft76Parser

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(web_socket, options = {}) ⇒ Draft75Parser

Returns a new instance of Draft75Parser.



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# File 'lib/faye/websocket/draft75_parser.rb', line 7

def initialize(web_socket, options = {})
  @socket = web_socket
  @stage  = 0
end

Instance Attribute Details

#protocol ⇒ Object (readonly)

Returns the value of attribute protocol.



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# File 'lib/faye/websocket/draft75_parser.rb', line 5

def protocol
  @protocol
end

Instance Method Details

#frame(data, type = nil, error_type = nil) ⇒ Object 



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# File 'lib/faye/websocket/draft75_parser.rb', line 79

def frame(data, type = nil, error_type = nil)
  return WebSocket.encode(data) if Array === data
  ["\x00", data, "\xFF"].map(&WebSocket.method(:encode)) * ''
end

#handshake_response ⇒ Object 



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# File 'lib/faye/websocket/draft75_parser.rb', line 16

def handshake_response
  upgrade =  "HTTP/1.1 101 Web Socket Protocol Handshake\r\n"
  upgrade << "Upgrade: WebSocket\r\n"
  upgrade << "Connection: Upgrade\r\n"
  upgrade << "WebSocket-Origin: #{@socket.env['HTTP_ORIGIN']}\r\n"
  upgrade << "WebSocket-Location: #{@socket.url}\r\n"
  upgrade << "\r\n"
  upgrade
end

#open? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/faye/websocket/draft75_parser.rb', line 26

def open?
  true
end

#parse(buffer) ⇒ Object 



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# File 'lib/faye/websocket/draft75_parser.rb', line 30

def parse(buffer)
  buffer.each_byte do |data|
    case @stage
      when 0 then
        parse_leading_byte(data)
        
      when 1 then
        value = (data & 0x7F)
        @length = value + 128 * @length
        
        if @closing and @length.zero?
          @socket.close(nil, nil, false)
        elsif (0x80 & data) != 0x80
          if @length.zero?
            @socket.receive('')
            @stage = 0
          else
            @buffer = []
            @stage = 2
          end
        end
        
      when 2 then
        if data == 0xFF
          @socket.receive(WebSocket.encode(@buffer))
          @stage = 0
        else
          @buffer << data
          if @length and @buffer.size == @length
            @stage = 0
          end
        end
    end
  end
  
  nil
end

#parse_leading_byte(data) ⇒ Object 



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# File 'lib/faye/websocket/draft75_parser.rb', line 68

def parse_leading_byte(data)
  if (0x80 & data) == 0x80
    @length = 0
    @stage = 1
  else
    @length = nil
    @buffer = []
    @stage = 2
  end
end

#version ⇒ Object 



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# File 'lib/faye/websocket/draft75_parser.rb', line 12

def version
  'hixie-75'
end