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

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

Instance Attribute Summary

Attributes inherited from Response

#connection

Instance Method Summary collapse

Methods inherited from Response

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

Constructor Details

#initialize(connection, 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(connection, stream_id)
  @input = nil
  @length = nil
  
  super(connection.version, nil, nil, ::Protocol::HTTP::Headers.new)
  
  @connection = connection
  @stream = Stream.new(self, connection, 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(@connection, 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 



106
107
108
109
110
111
112
113
114
115
116
 
# File 'lib/async/http/protocol/http2/response.rb', line 106

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
103
104
 
# 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)
    elsif key == PROTOCOL
      @protocol = 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 



118
119
120
121
122
123
124
 
# File 'lib/async/http/protocol/http2/response.rb', line 118

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.



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
162
163
164
165
166
167
 
# File 'lib/async/http/protocol/http2/response.rb', line 133

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
  
  if protocol = request.protocol
    pseudo_headers << [PROTOCOL, protocol]
  end
  
  headers = ::Protocol::HTTP::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 



126
127
128
129
130
 
# File 'lib/async/http/protocol/http2/response.rb', line 126

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