```ruby
require 'socket'
require 'json'
require 'multibinder'

server = MultiBinder.bind '127.0.0.1', ARGV[0].to_i

loop do
  socket, _ = server.accept
  request = socket.gets
  puts request

  socket.print "HTTP/1.0 200 OK\r\n"
  socket.print "Content-Type: text/plain\r\n"
  socket.print "Connection: close\r\n"

  socket.print "\r\n"

  socket.print "Hello World #{ARGV[1] || ''}!\n"

  socket.close
end
```

Allow test clients to close the connection before response arrives.
user
```ruby
require 'socket'
require 'json'
require 'multibinder'

server = MultiBinder.bind '127.0.0.1', ARGV[0].to_i

loop do
  socket, _ = server.accept
  request = socket.gets
  puts request

  begin
    socket.print "HTTP/1.0 200 OK\r\n"
    socket.print "Content-Type: text/plain\r\n"
    socket.print "Connection: close\r\n"

    socket.print "\r\n"

    socket.print "Hello World #{ARGV[1] || ''}!\n"

    socket.close
  rescue Errno::EPIPE
    puts 'Client unexpectedly closed connection'
  end
end
```
assistant