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.



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# 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

#create_promise_stream(headers, stream_id) ⇒ Object 



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# 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 



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

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 100

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 80

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 



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# File 'lib/async/http/protocol/http2/response.rb', line 112

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 127

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, ::HTTP::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 120

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 68

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