Method: HTTP::Protocol::HTTP2::Connection#process_settings

Defined in:
lib/http/protocol/http2/connection.rb

#process_settings(frame) ⇒ Boolean

In addition to changing the flow-control window for streams that are not yet active, a SETTINGS frame can alter the initial flow-control window size for streams with active flow-control windows (that is, streams in the “open” or “half-closed (remote)” state). When the value of SETTINGS_INITIAL_WINDOW_SIZE changes, a receiver MUST adjust the size of all stream flow-control windows that it maintains by the difference between the new value and the old value.

Returns:

  • (Boolean) —

    whether the frame was an acknowledgement



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# File 'lib/http/protocol/http2/connection.rb', line 192

def process_settings(frame)
  if frame.acknowledgement?
    # The remote end has confirmed the settings have been received:
    changes = @local_settings.acknowledge
    
    update_local_settings(changes)
    
    return true
  else
    # The remote end is updating the settings, we reply with acknowledgement:
    reply = frame.acknowledge
    
    write_frame(reply)
    
    changes = frame.unpack
    @remote_settings.update(changes)
    
    update_remote_settings(changes)
    
    return false
  end
end