Class: WebSocket::Driver::Draft75

Inherits:
WebSocket::Driver show all
Defined in:
lib/websocket/driver/draft75.rb

Direct Known Subclasses

Draft76

Constant Summary

Constants inherited from WebSocket::Driver

MAX_LENGTH, STATES

Instance Attribute Summary

Attributes inherited from WebSocket::Driver

#protocol, #ready_state

Instance Method Summary collapse

Methods inherited from WebSocket::Driver

#binary, #ping, #set_header, #start, #state, #text

Methods included from EventEmitter

#add_listener, #emit, #listener_count, #listeners, #on, #remove_all_listeners, #remove_listener

Constructor Details

#initialize(socket, options = {}) ⇒ Draft75

Returns a new instance of Draft75.



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# File 'lib/websocket/driver/draft75.rb', line 5

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

  @headers['Upgrade'] = 'WebSocket'
  @headers['Connection'] = 'Upgrade'
  @headers['WebSocket-Origin'] = @socket.env['HTTP_ORIGIN']
  @headers['WebSocket-Location'] = @socket.url
end

Instance Method Details

#close(reason = nil, code = nil) ⇒ Object 



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# File 'lib/websocket/driver/draft75.rb', line 19

def close(reason = nil, code = nil)
  return false if @ready_state == 3
  @ready_state = 3
  emit(:close, CloseEvent.new(nil, nil))
  true
end

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



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# File 'lib/websocket/driver/draft75.rb', line 71

def frame(data, type = nil, error_type = nil)
  return queue([data, type, error_type]) if @ready_state == 0
  frame = ["\x00", data, "\xFF"].map { |s| Driver.encode(s, :binary) } * ''
  @socket.write(Driver.encode(frame, :binary))
  true
end

#parse(buffer) ⇒ Object 



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# File 'lib/websocket/driver/draft75.rb', line 26

def parse(buffer)
  return if @ready_state > 1
  buffer = buffer.bytes if buffer.respond_to?(:bytes)

  buffer.each do |data|
    case @stage
      when -1 then
        @body << data
        send_handshake_body

      when 0 then
        parse_leading_byte(data)

      when 1 then
        value = (data & 0x7F)
        @length = value + 128 * @length

        if @closing and @length.zero?
          return close
        elsif (0x80 & data) != 0x80
          if @length.zero?
            @stage = 0
          else
            @skipped = 0
            @stage = 2
          end
        end

      when 2 then
        if data == 0xFF
          emit(:message, MessageEvent.new(Driver.encode(@buffer, :utf8)))
          @stage = 0
        else
          if @length
            @skipped += 1
            @stage = 0 if @skipped == @length
          else
            @buffer << data
            return close if @buffer.size > @max_length
          end
        end
    end
  end
end

#version ⇒ Object 



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# File 'lib/websocket/driver/draft75.rb', line 15

def version
  'hixie-75'
end