add handler for RequestValidationError

lnbits/app.py

@@ -184,10 +184,32 @@ def register_exception_handlers(app: FastAPI):
             )
 
         return JSONResponse(
-            status_code=HTTPStatus.BAD_REQUEST,
+            status_code=HTTPStatus.NO_CONTENT,
             content={"detail": exc_str},
         )
 
+    @app.exception_handler(RequestValidationError)
+    async def validation_exception_handler(
+        request: Request, exc: RequestValidationError
+    ):
+        # Only the browser sends "text/html" request
+        # not fail proof, but everything else get's a JSON response
+
+        if (
+            request.headers
+            and "accept" in request.headers
+            and "text/html" in request.headers["accept"]
+        ):
+            return template_renderer().TemplateResponse(
+                "error.html",
+                {"request": request, "err": f"{exc.errors()} is not a valid UUID."},
+            )
+
+        return JSONResponse(
+            status_code=HTTPStatus.NO_CONTENT,
+            content={"detail": exc.errors()},
+        )
+
 
 def configure_logger() -> None:
     logger.remove()