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Contents
# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2019-2023, by Samuel Williams.
# Copyright, 2020, by Bruno Sutic.
require 'async/io/socket'
require 'async/io/stream'
require_relative 'writable'
module Async
module HTTP
module Body
class Pipe
# If the input stream is closed first, it's likely the output stream will also be closed.
def initialize(input, output = Writable.new, task: Task.current)
@input = input
@output = output
head, tail = IO::Socket.pair(Socket::AF_UNIX, Socket::SOCK_STREAM)
@head = IO::Stream.new(head)
@tail = tail
@reader = nil
@writer = nil
task.async(transient: true, &self.method(:reader))
task.async(transient: true, &self.method(:writer))
end
def to_io
@tail
end
def close
@reader&.stop
@writer&.stop
@tail.close
end
private
# Read from the @input stream and write to the head of the pipe.
def reader(task)
@reader = task
task.annotate "#{self.class} reader."
while chunk = @input.read
@head.write(chunk)
@head.flush
end
@head.close_write
ensure
@input.close($!)
close_head if @writer&.finished?
end
# Read from the head of the pipe and write to the @output stream.
# If the @tail is closed, this will cause chunk to be nil, which in turn will call `@output.close` and `@head.close`
def writer(task)
@writer = task
task.annotate "#{self.class} writer."
while chunk = @head.read_partial
@output.write(chunk)
end
ensure
@output.close($!)
close_head if @reader&.finished?
end
def close_head
@head.close
# Both tasks are done, don't keep references:
@reader = nil
@writer = nil
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems