net/http repro of https://bugs.ruby-lang.org/issues/13882

http_exit_hang.rb

# Repro case of https://bugs.ruby-lang.org/issues/13882.
# A thread in the middle of reading GZip-encoded content with Net::HTTP
# will stop a Ruby process from exiting.

require 'net/http'

PORT = 5678
SLEEP = 1

# Server
Thread.new do
  server = TCPServer.new(PORT).accept
  server.print "HTTP/1.1 200\r\n"
  server.print "Content-Type: text/plain\r\n"
  server.print "Content-Encoding: gzip\r\n"
  s = StringIO.new
  z = Zlib::GzipWriter.new(s)
  z.write 'Hello World!'
  z.close
  server.print "Content-Length: #{s.length}\r\n\r\n"

  # Sleep half-way through writing encoded content.
  half = s.length / 2
  p1 = s.string.byteslice(0, half)
  p2 = s.string.byteslice(half, half)
  server.write p1
  sleep SLEEP
  server.write p2
end

# Client
Thread.new do
  begin
    puts Net::HTTP.get(URI('http://localhost:5678'))
  rescue Zlib::BufError => e
    puts "Caught error: #{e.inspect}"
    retry
  end
end

at_exit {puts 'Exiting'}

# Exit half-way through writing encoded content.
sleep SLEEP / 2.0