Class: Protocol::HTTP2::Framer

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

Instance Method Summary collapse

Constructor Details

#initialize(stream, frames = FRAMES) ⇒ Framer

Returns a new instance of Framer.



55
56
57
58
 
# File 'lib/protocol/http2/framer.rb', line 55

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

Instance Method Details

#close ⇒ Object 



60
61
62
 
# File 'lib/protocol/http2/framer.rb', line 60

def close
	@stream.close
end

#read_connection_preface ⇒ Object 



68
69
70
71
72
73
74
75
76
 
# File 'lib/protocol/http2/framer.rb', line 68

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

#read_frame(maximum_frame_size = MAXIMUM_ALLOWED_FRAME_SIZE) ⇒ Object 



78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
 
# File 'lib/protocol/http2/framer.rb', line 78

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 



103
104
105
106
107
108
109
110
 
# File 'lib/protocol/http2/framer.rb', line 103

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 



64
65
66
 
# File 'lib/protocol/http2/framer.rb', line 64

def write_connection_preface
	@stream.write(CONNECTION_PREFACE_MAGIC)
end

#write_frame(frame) ⇒ Object 



94
95
96
97
98
99
100
101
 
# File 'lib/protocol/http2/framer.rb', line 94

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