```paython from http.server import HTTPServer, SimpleHTTPRequestHandler import sys class CORSRequestHandler(SimpleHTTPRequestHandler): def end_headers(self): self.send_header('Access-Control-Allow-Origin', 'origin') self.send_header('Access-Control-Allow-Methods', '*') self.send_header('Access-Control-Allow-Headers', '*') self.send_header('Cache-Control', 'no-store, no-cache, must-revalidate') return super(CORSRequestHandler, self).end_headers() def do_OPTIONS(self): self.send_response(200) self.end_headers() host = sys.argv[1] if len(sys.argv) > 2 else '0.0.0.0' port = int(sys.argv[len(sys.argv)-1]) if len(sys.argv) > 1 else 8080 print("Listening on {}:{}".format(host, port)) httpd = HTTPServer((host, port), CORSRequestHandler) httpd.serve_forever() ```