Class: Async::HTTP::Protocol::HTTP2::Stream

Inherits:
Protocol::HTTP2::Stream
  • Object
show all
Defined in:
lib/async/http/protocol/http2/stream.rb

Direct Known Subclasses

Request::Stream, Response::Stream

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Stream

Returns a new instance of Stream.



18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/async/http/protocol/http2/stream.rb', line 18

def initialize(*)
	super
	
	@headers = nil
	
	@pool = nil
	
	# Input buffer, reading request body, or response body (receive_data):
	@length = nil
	@input = nil
	
	# Output buffer, writing request body or response body (window_updated):
	@output = nil
end

Instance Attribute Details

#headers ⇒ Object

Returns the value of attribute headers.



33
34
35
 
# File 'lib/async/http/protocol/http2/stream.rb', line 33

def headers
  @headers
end

#input ⇒ Object (readonly)

Returns the value of attribute input.



37
38
39
 
# File 'lib/async/http/protocol/http2/stream.rb', line 37

def input
  @input
end

#pool ⇒ Object

Returns the value of attribute pool.



35
36
37
 
# File 'lib/async/http/protocol/http2/stream.rb', line 35

def pool
  @pool
end

Instance Method Details

#add_header(key, value, trailer: false) ⇒ Object 



39
40
41
42
43
44
45
46
47
48
49
 
# File 'lib/async/http/protocol/http2/stream.rb', line 39

def add_header(key, value, trailer: false)
	if key == CONNECTION
		raise ::Protocol::HTTP2::HeaderError, "Connection header is not allowed!"
	elsif key.start_with? ":"
		raise ::Protocol::HTTP2::HeaderError, "Invalid pseudo-header #{key}!"
	elsif key =~ /[A-Z]/
		raise ::Protocol::HTTP2::HeaderError, "Invalid upper-case characters in header #{key}!"
	else
		@headers.add(key, value, trailer: trailer)
	end
end

#closed(error) ⇒ Object

When the stream transitions to the closed state, this method is called. There are roughly two ways this can happen:

  • A frame is received which causes this stream to enter the closed state. This method will be invoked from the background reader task.

  • A frame is sent which causes this stream to enter the closed state. This method will be invoked from that task.

While the input stream is relatively straight forward, the output stream can trigger the second case above



157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
 
# File 'lib/async/http/protocol/http2/stream.rb', line 157

def closed(error)
	super
	
	if input = @input
		@input = nil
		input.close_write(error)
	end
	
	if output = @output
		@output = nil
		output.stop(error)
	end
	
	if pool = @pool and @connection
		pool.release(@connection)
	end
	
	return self
end

#finish_output(error = nil) ⇒ Object

Called when the output terminates normally.



126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
 
# File 'lib/async/http/protocol/http2/stream.rb', line 126

def finish_output(error = nil)
	return if self.closed?
	
	trailer = @output&.trailer
	
	@output = nil
	
	if error
		send_reset_stream(::Protocol::HTTP2::Error::INTERNAL_ERROR)
	else
		# Write trailer?
		if trailer&.any?
			send_headers(trailer, ::Protocol::HTTP2::END_STREAM)
		else
			send_data(nil, ::Protocol::HTTP2::END_STREAM)
		end
	end
end

#prepare_input(length) ⇒ Input

Prepare the input stream which will be used for incoming data frames.

Returns:

  • the input body.



83
84
85
86
87
88
89
 
# File 'lib/async/http/protocol/http2/stream.rb', line 83

def prepare_input(length)
	if @input.nil?
		@input = Input.new(self, length)
	else
		raise ArgumentError, "Input body already prepared!"
	end
end

#process_data(frame) ⇒ Object 



98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
 
# File 'lib/async/http/protocol/http2/stream.rb', line 98

def process_data(frame)
	data = frame.unpack
	
	if @input
		unless data.empty?
			@input.write(data)
		end
		
		if frame.end_stream?
			@input.close_write
		end
	end
	
	return data
rescue ::Protocol::HTTP2::ProtocolError
	raise
rescue # Anything else...
	send_reset_stream(::Protocol::HTTP2::Error::INTERNAL_ERROR)
end

#process_headers(frame) ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
# File 'lib/async/http/protocol/http2/stream.rb', line 57

def process_headers(frame)
	if @headers and frame.end_stream?
		self.receive_trailing_headers(super, frame.end_stream?)
	else
		self.receive_initial_headers(super, frame.end_stream?)
	end
	
	if @input and frame.end_stream?
		@input.close_write
	end
rescue ::Protocol::HTTP::InvalidTrailerError => error
	Console.warn(self, error)
	
	send_reset_stream(::Protocol::HTTP2::Error::PROTOCOL_ERROR)
rescue ::Protocol::HTTP2::HeaderError => error
	Console.debug(self, "Error while processing headers!", error)
	
	send_reset_stream(error.code)
end

#receive_trailing_headers(headers, end_stream) ⇒ Object 



51
52
53
54
55
 
# File 'lib/async/http/protocol/http2/stream.rb', line 51

def receive_trailing_headers(headers, end_stream)
	headers.each do |key, value|
		add_header(key, value, trailer: true)
	end
end

#send_body(body, trailer = nil) ⇒ Object

Set the body and begin sending it.



119
120
121
122
123
 
# File 'lib/async/http/protocol/http2/stream.rb', line 119

def send_body(body, trailer = nil)
	@output = Output.new(self, body, trailer)
	
	@output.start
end

#update_local_window(frame) ⇒ Object 



91
92
93
94
95
96
 
# File 'lib/async/http/protocol/http2/stream.rb', line 91

def update_local_window(frame)
	consume_local_window(frame)
	
	# This is done on demand in `Input#read`:
	# request_window_update
end

#wait_for_input ⇒ Object 



77
78
79
 
# File 'lib/async/http/protocol/http2/stream.rb', line 77

def wait_for_input
	return @input
end

#window_updated(size) ⇒ Object 



145
146
147
148
149
150
151
 
# File 'lib/async/http/protocol/http2/stream.rb', line 145

def window_updated(size)
	super
	
	@output&.window_updated(size)
	
	return true
end