Class: Protocol::HTTP2::Priority

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

Overview

Stream Dependency: A 31-bit stream identifier for the stream that this stream depends on (see Section 5.3). This field is only present if the PRIORITY flag is set.

Constant Summary collapse

FORMAT = 
"NC".freeze
EXCLUSIVE = 
1 << 31

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#exclusive ⇒ Object

Returns the value of attribute exclusive

Returns:

  • (Object) —

    the current value of exclusive



30
31
32
 
# File 'lib/protocol/http2/priority_frame.rb', line 30

def exclusive
  @exclusive
end

#stream_dependency ⇒ Object

Returns the value of attribute stream_dependency

Returns:

  • (Object) —

    the current value of stream_dependency



30
31
32
 
# File 'lib/protocol/http2/priority_frame.rb', line 30

def stream_dependency
  @stream_dependency
end

#weight ⇒ Object

Returns the value of attribute weight

Returns:

  • (Object) —

    the current value of weight



30
31
32
 
# File 'lib/protocol/http2/priority_frame.rb', line 30

def weight
  @weight
end

Class Method Details

.default(stream_dependency = 0, weight = 16) ⇒ Object

All streams are initially assigned a non-exclusive dependency on stream 0x0. Pushed streams (Section 8.2) initially depend on their associated stream. In both cases, streams are assigned a default weight of 16.



35
36
37
 
# File 'lib/protocol/http2/priority_frame.rb', line 35

def self.default(stream_dependency = 0, weight = 16)
	self.new(false, stream_dependency, weight)
end

.unpack(data) ⇒ Object 



39
40
41
42
43
44
 
# File 'lib/protocol/http2/priority_frame.rb', line 39

def self.unpack(data)
	stream_dependency, weight = data.unpack(FORMAT)
	
	# Weight:  An unsigned 8-bit integer representing a priority weight for the stream (see Section 5.3).  Add one to the value to obtain a weight between 1 and 256.  This field is only present if the PRIORITY flag is set.
	return self.new(stream_dependency & EXCLUSIVE != 0, stream_dependency & ~EXCLUSIVE, weight + 1)
end

Instance Method Details

#pack ⇒ Object 



46
47
48
49
50
51
52
53
54
 
# File 'lib/protocol/http2/priority_frame.rb', line 46

def pack
	if exclusive
		stream_dependency = self.stream_dependency | EXCLUSIVE
	else
		stream_dependency = self.stream_dependency
	end
	
	return [stream_dependency, self.weight - 1].pack(FORMAT)
end