serve_frontend.py

import os, sys, http.server, socketserver
PORT = int(os.environ.get("FRONTEND_PORT", "99"))
DIR  = os.environ.get("FRONTEND_DIR",  os.path.join(os.getcwd(), "frontend"))

class Handler(http.server.SimpleHTTPRequestHandler):
    def __init__(self, *a, directory=None, **k):
        super().__init__(*a, directory=DIR, **k)
    def end_headers(self):
        path = self.path.split("?",1)[0]
        if path.endswith(".html") or path.endswith("/") or path == "/":
            self.send_header("Cache-Control", "no-store, max-age=0")
        elif path.endswith(".js") or path.endswith(".css") or "script." in path:
            
        super().end_headers()
    def log_message(self, fmt, *args):
        sys.stdout.write("%s - - [%s] %s\n" % (self.client_address[0], self.log_date_time_string(), fmt%args)); sys.stdout.flush()

Handler.extensions_map.update({
    ".html": "text/html; charset=utf-8",
    ".htm" : "text/html; charset=utf-8",
    ".js"  : "application/javascript; charset=utf-8",
    ".css" : "text/css; charset=utf-8",
    "": "text/html; charset=utf-8",
})

if __name__ == "__main__":
    with socketserver.TCPServer(("", PORT), Handler) as httpd:
        print(f"Serving {DIR} at http://127.0.0.1:{PORT}")
        try: httpd.serve_forever()
        except KeyboardInterrupt: pass