Module: Async::HTTP::Protocol::HTTP2::Connection

Included in:
Client, Server
Defined in:
lib/async/http/protocol/http2/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#count ⇒ Object (readonly)

Returns the value of attribute count.



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# File 'lib/async/http/protocol/http2/connection.rb', line 122

def count
  @count
end

#promises ⇒ Object (readonly)

Returns the value of attribute promises.



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# File 'lib/async/http/protocol/http2/connection.rb', line 116

def promises
  @promises
end

#stream ⇒ Object (readonly)

Returns the value of attribute stream.



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# File 'lib/async/http/protocol/http2/connection.rb', line 42

def stream
  @stream
end

Instance Method Details

#close(error = nil) ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 56

def close(error = nil)
	super
	
	# Ensure the reader task is stopped.
	if @reader
		reader = @reader
		@reader = nil
		reader.stop
	end
end

#concurrency ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 124

def concurrency
	self.maximum_concurrent_streams
end

#http1? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/http/protocol/http2/connection.rb', line 44

def http1?
	false
end

#http2? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/http/protocol/http2/connection.rb', line 48

def http2?
	true
end

#initialize ⇒ Object 



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

def initialize(*)
	super
	
	@count = 0
	@reader = nil
	
	# Writing multiple frames at the same time can cause odd problems if frames are only partially written. So we use a semaphore to ensure frames are written in their entirety.
	@write_frame_guard = Async::Semaphore.new(1)
end

#peer ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 118

def peer
	@stream.io
end

#read_in_background(parent: Task.current) ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/async/http/protocol/http2/connection.rb', line 84

def read_in_background(parent: Task.current)
	raise RuntimeError, "Connection is closed!" if closed?
	
	parent.async(transient: true) do |task|
		@reader = task
		
		task.annotate("#{version} reading data for #{self.class}.")
		
		# We don't need to defer stop here as this is already a transient task (ignores stop):
		begin
			while !self.closed?
				self.consume_window
				self.read_frame
			end
		rescue SocketError, IOError, EOFError, Errno::ECONNRESET, Errno::EPIPE, Async::Wrapper::Cancelled
			# Ignore.
		rescue ::Protocol::HTTP2::GoawayError => error
			# Error is raised if a response is actively reading from the
			# connection. The connection is silently closed if GOAWAY is
			# received outside the request/response cycle.
			if @reader
				self.close(error)
			end
		ensure
			# Don't call #close twice.
			if @reader
				self.close($!)
			end
		end
	end
end

#reusable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/async/http/protocol/http2/connection.rb', line 133

def reusable?
	!self.closed?
end

#start_connection ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 52

def start_connection
	@reader || read_in_background
end

#to_s ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 38

def to_s
	"\#<#{self.class} #{@streams.count} active streams>"
end

#version ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 137

def version
	VERSION
end

#viable? ⇒ Boolean

Can we use this connection to make requests?

Returns:

  • (Boolean) 


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# File 'lib/async/http/protocol/http2/connection.rb', line 129

def viable?
	@stream.connected?
end

#write_frame(frame) ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 67

def write_frame(frame)
	# We don't want to write multiple frames at the same time.
	@write_frame_guard.acquire do
		super
	end
	
	@stream.flush
end

#write_frames(&block) ⇒ Object 



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# File 'lib/async/http/protocol/http2/connection.rb', line 76

def write_frames(&block)
	@write_frame_guard.acquire do
		super
	end
	
	@stream.flush
end