fix middleware

gradio_webhooks.py

@@ -3,7 +3,8 @@ from pathlib import Path
 from typing import Literal, Optional, Set, Union
 
 import gradio as gr
-from fastapi import HTTPException, Request
+from fastapi import Request
+from fastapi.responses import JSONResponse
 from pydantic import BaseModel
 
 
@@ -68,7 +69,7 @@ class GradioWebhookApp:
     def add_webhook(self, path: str):
         """Decorator to add a webhook to the server app."""
         self.webhook_paths.add(path)
-        return self.fastapi_app.get(path)
+        return self.fastapi_app.post(path)
 
     def ready(self) -> None:
         """Set the app as "ready" and block main thread to keep it running."""
@@ -88,9 +89,13 @@ class GradioWebhookApp:
             if self._webhook_secret is not None:
                 request_secret = request.headers.get("x-webhook-secret")
                 if request_secret is None:
-                    raise HTTPException(401)
+                    return JSONResponse(
+                        {"error": "x-webhook-secret header not set."}, status_code=401
+                    )
                 if request_secret != self._webhook_secret:
-                    raise HTTPException(403)
+                    return JSONResponse(
+                        {"error": "Invalid webhook secret."}, status_code=403
+                    )
         return await call_next(request)