Class: Async::HTTP::Protocol::HTTP2::Response

Inherits:
Response show all
Defined in:
lib/async/http/protocol/http2/response.rb

Instance Attribute Summary

Attributes inherited from Response

#protocol

Attributes inherited from Response

#body, #headers, #reason, #status, #version

Instance Method Summary collapse

Methods inherited from Response

#hijack?, #peer, #remote_address, #remote_address=

Methods inherited from Response

[], #bad_request?, #continue?, #failure?, for_exception, #partial?, #preserve_method?, #redirection?, #server_failure?, #success?, #to_s

Methods included from Body::Reader

#body?, #close, #each, #finish, #read, #save

Constructor Details

#initialize(protocol, stream_id) ⇒ Response

Returns a new instance of Response.



28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/async/http/protocol/http2/response.rb', line 28

def initialize(protocol, stream_id)
	@input = nil
	@length = nil
	
	super(protocol.version, nil, nil, Headers.new, nil)
	
	@protocol = protocol
	@stream = Stream.new(self, protocol, stream_id)
	
	@notification = Async::Notification.new
	@exception = nil
	
	@promises = nil
end

Instance Method Details

#close!(state) ⇒ Object 



55
56
57
 
# File 'lib/async/http/protocol/http2/response.rb', line 55

def close!(state)
	self.promises.enqueue(nil)
end

#create_promise_stream(headers, stream_id) ⇒ Object 



47
48
49
50
51
52
53
 
# File 'lib/async/http/protocol/http2/response.rb', line 47

def create_promise_stream(headers, stream_id)
	promise = Promise.new(@protocol, headers, stream_id)
	
	self.promises.enqueue(promise)
	
	return promise.stream
end

#promises ⇒ Object 



43
44
45
 
# File 'lib/async/http/protocol/http2/response.rb', line 43

def promises
	@promises ||= Async::Queue.new
end

#receive_data(stream, data, end_stream) ⇒ Object 



104
105
106
107
108
109
110
111
112
113
114
 
# File 'lib/async/http/protocol/http2/response.rb', line 104

def receive_data(stream, data, end_stream)
	unless data.empty?
		@input.write(data)
	end
	
	if end_stream
		@input.close
	end
rescue
	@stream.send_reset_stream(0)
end

#receive_headers(stream, headers, end_stream) ⇒ Object

This should be invoked from the background reader, and notifies the task waiting for the headers that we are done.



84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
 
# File 'lib/async/http/protocol/http2/response.rb', line 84

def receive_headers(stream, headers, end_stream)
	headers.each do |key, value|
		if key == STATUS
			@status = Integer(value)
		elsif key == REASON
			@reason = value
		elsif key == CONTENT_LENGTH
			@length = Integer(value)
		else
			@headers[key] = value
		end
	end
	
	unless end_stream
		@body = @input = Body::Writable.new(@length)
	end
	
	notify!
end

#receive_reset_stream(stream, error_code) ⇒ Object 



116
117
118
119
120
121
122
 
# File 'lib/async/http/protocol/http2/response.rb', line 116

def receive_reset_stream(stream, error_code)
	if error_code > 0
		@exception = EOFError.new("Stream reset: error_code=#{error_code}")
	end
	
	notify!
end

#send_request(request) ⇒ Object

Send a request and read it into this response.



131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
 
# File 'lib/async/http/protocol/http2/response.rb', line 131

def send_request(request)
	# https://http2.github.io/http2-spec/#rfc.section.8.1.2.3
	# All HTTP/2 requests MUST include exactly one valid value for the :method, :scheme, and :path pseudo-header fields, unless it is a CONNECT request (Section 8.3). An HTTP request that omits mandatory pseudo-header fields is malformed (Section 8.1.2.6).
	pseudo_headers = [
		[SCHEME, request.scheme],
		[METHOD, request.method],
		[PATH, request.path],
	]
	
	# To ensure that the HTTP/1.1 request line can be reproduced accurately, this pseudo-header field MUST be omitted when translating from an HTTP/1.1 request that has a request target in origin or asterisk form (see [RFC7230], Section 5.3). Clients that generate HTTP/2 requests directly SHOULD use the :authority pseudo-header field instead of the Host header field.
	if authority = request.authority
		pseudo_headers << [AUTHORITY, authority]
	end
	
	headers = Headers::Merged.new(
		pseudo_headers,
		request.headers
	)
	
	if request.body.nil?
		@stream.send_headers(nil, headers, ::Protocol::HTTP2::END_STREAM)
	else
		begin
			@stream.send_headers(nil, headers)
		rescue
			raise RequestFailed
		end
		
		@stream.send_body(request.body)
	end
end

#stop_connection(error) ⇒ Object 



124
125
126
127
128
 
# File 'lib/async/http/protocol/http2/response.rb', line 124

def stop_connection(error)
	@exception = error
	
	notify!
end

#wait ⇒ Object

Wait for the headers to be received or for stream reset.



72
73
74
75
76
77
78
79
80
81
 
# File 'lib/async/http/protocol/http2/response.rb', line 72

def wait
	# If you call wait after the headers were already received, it should return immediately.
	if @notification
		@notification.wait
	end
	
	if @exception
		raise @exception
	end
end