update

AzA march 2026/desktop_backend_autostart.py

@@ -0,0 +1,79 @@
+import socket
+import threading
+import time
+import traceback
+
+
+BACKEND_HOST = "127.0.0.1"
+BACKEND_BIND_HOST = "0.0.0.0"
+BACKEND_PORT = 8000
+_backend_thread = None
+_backend_error = None
+
+
+def is_port_open(host: str = BACKEND_HOST, port: int = BACKEND_PORT) -> bool:
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.settimeout(0.5)
+        try:
+            s.connect((host, port))
+            return True
+        except Exception:
+            return False
+
+
+def _run_backend_in_thread() -> None:
+    global _backend_error
+    try:
+        import uvicorn
+        import backend_main
+
+        app = getattr(backend_main, "app", None)
+        if app is None:
+            raise RuntimeError("backend_main.app wurde nicht gefunden.")
+
+        config = uvicorn.Config(
+            app=app,
+            host=BACKEND_BIND_HOST,
+            port=BACKEND_PORT,
+            log_level="info",
+        )
+        server = uvicorn.Server(config)
+        server.run()
+    except Exception:
+        _backend_error = traceback.format_exc()
+
+
+def start_backend(timeout_seconds: float = 20.0) -> bool:
+    global _backend_thread
+
+    if is_port_open():
+        return True
+
+    if _backend_thread is None or not _backend_thread.is_alive():
+        _backend_thread = threading.Thread(
+            target=_run_backend_in_thread,
+            name="aza-local-backend",
+            daemon=True,
+        )
+        _backend_thread.start()
+
+    deadline = time.time() + timeout_seconds
+    while time.time() < deadline:
+        if is_port_open():
+            return True
+        if _backend_error:
+            return False
+        time.sleep(0.25)
+
+    return False
+
+
+def get_backend_error() -> str:
+    return _backend_error or ""
+
+
+if __name__ == "__main__":
+    ok = start_backend()
+    print("backend_started:", ok)
+    if not ok and _backend_error:
+        print(_backend_error)