local https python server with cors enabled

server.py

#!/usr/bin/env python3

from http.server import HTTPServer, SimpleHTTPRequestHandler
import ssl
import sys

class CORSRequestHandler (SimpleHTTPRequestHandler):
    def end_headers (self):
        self.send_header('Access-Control-Allow-Origin', '*')
        SimpleHTTPRequestHandler.end_headers(self)

try:
    port = sys.argv[1] if len(sys.argv) > 1 else 8000
    print("Launching on port: "+str(port))
    httpd = HTTPServer(('localhost', int(port)), CORSRequestHandler)
    httpd.socket = ssl.wrap_socket (httpd.socket, keyfile="key.pem", certfile='cert.pem', server_side=True)
    httpd.serve_forever()
except:
    print("An error occurs, did you launch the following command?")
    print("openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365")