fix: add 'global' keyword for _active_connections, _total_requests

app.py

@@ -172,6 +172,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
         self.end_headers()
 
     def do_GET(self):
+        global _active_connections, _total_requests
         if not self._check_rate_limit(self.client_address[0]):
             self._json(429, {"error": "Too many requests"})
             return
@@ -267,6 +268,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
                 _active_connections -= 1
 
     def do_POST(self):
+        global _active_connections, _total_requests
         if not self._check_rate_limit(self.client_address[0]):
             self._json(429, {"error": "Too many requests"})
             return