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

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

Instance Attribute Summary collapse

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.



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# File 'lib/async/http/protocol/http2/response.rb', line 28

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

Instance Attribute Details

#stream ⇒ Object (readonly)

Returns the value of attribute stream.



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

def stream
  @stream
end

Instance Method Details

#accept_push_promise_stream(promised_stream_id, headers) ⇒ Object 



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# File 'lib/async/http/protocol/http2/response.rb', line 49

def accept_push_promise_stream(promised_stream_id, headers)
  @connection.accept_push_promise_stream(promised_stream_id) do
    promise = Promise.new(@connection, headers, promised_stream_id)
    
    self.promises.enqueue(promise)
  end
end

#close! ⇒ Object

Stream state transition into ‘:closed`.



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# File 'lib/async/http/protocol/http2/response.rb', line 58

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

#promises ⇒ Object 



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

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

#receive_data(stream, data, end_stream) ⇒ Object 



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# File 'lib/async/http/protocol/http2/response.rb', line 107

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.



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# File 'lib/async/http/protocol/http2/response.rb', line 87

def receive_headers(stream, headers, end_stream)
  headers.each do |key, value|
    if key == STATUS
      @status = Integer(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 



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# File 'lib/async/http/protocol/http2/response.rb', line 119

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.



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# File 'lib/async/http/protocol/http2/response.rb', line 134

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 



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# File 'lib/async/http/protocol/http2/response.rb', line 127

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

#wait ⇒ Object

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



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# File 'lib/async/http/protocol/http2/response.rb', line 75

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