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