quick ipv6 http server using python's SimpleHttpServer

ipv6-httpd.py

import http.server
from http.server import SimpleHTTPRequestHandler
import socketserver
import socket
import sys

class MyHandler(SimpleHTTPRequestHandler):
  def do_GET(self):
    if self.path == '/__ip__':
      self.send_response(200)
      self.send_header('Content-type', 'text/html')
      self.end_headers()
      self.wfile.write(('Your IP address is %s' % self.client_address[0]).encode('utf8'))
      return
    else:
      return SimpleHTTPRequestHandler.do_GET(self)

class HTTPServerV6(http.server.HTTPServer):
  address_family = socket.AF_INET6

def main():
  if len(sys.argv) <= 1:
    server = HTTPServerV6(('::', 8000), MyHandler)
    server.serve_forever()
  else:
    server = HTTPServerV6((sys.argv[1], sys.argv[2]), MyHandler)
    server.serve_forever()

if __name__ == '__main__':
  main()