Class: HTTP::Protocol::HTTP2::Framer

Inherits:
Object
  • Object
show all
Defined in:
lib/http/protocol/http2/framer.rb

Instance Method Summary collapse

Constructor Details

#initialize(stream, frames = FRAMES) ⇒ Framer

Returns a new instance of Framer.



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# File 'lib/http/protocol/http2/framer.rb', line 56

def initialize(stream, frames = FRAMES)
  @stream = stream
  @frames = frames
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 61

def close
  @stream.close
end

#read_connection_preface ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 69

def read_connection_preface
  string = @stream.read(CONNECTION_PREFACE_MAGIC.bytesize)
  
  unless string == CONNECTION_PREFACE_MAGIC
    raise ProtocolError, "Invalid connection preface: #{string.inspect}"
  end
  
  return string
end

#read_frame(maximum_frame_size = MAXIMUM_ALLOWED_FRAME_SIZE) ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 79

def read_frame(maximum_frame_size = MAXIMUM_ALLOWED_FRAME_SIZE)
  # Read the header:
  length, type, flags, stream_id = read_header
  
  # puts "framer: read_frame #{type} #{length}"
  
  # Allocate the frame:
  klass = @frames[type] || Frame
  frame = klass.new(stream_id, flags, type, length)
  
  # Read the payload:
  frame.read(@stream, maximum_frame_size)
  
  return frame
end

#read_header ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 104

def read_header
  if buffer = @stream.read(9)
    return Frame.parse_header(buffer)
  else
    # TODO: Is this necessary? I thought the IO would throw this.
    raise EOFError
  end
end

#write_connection_preface ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 65

def write_connection_preface
  @stream.write(CONNECTION_PREFACE_MAGIC)
end

#write_frame(frame) ⇒ Object 



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# File 'lib/http/protocol/http2/framer.rb', line 95

def write_frame(frame)
  # puts "framer: write_frame #{frame.inspect}"
  frame.write(@stream)
  
  @stream.flush
  
  return frame
end