Fix Too many branches error by creating new method _check_content_length

Author: sokoliva

src/a2a/server/apps/jsonrpc/jsonrpc_app.py

@@ -265,6 +265,22 @@ def _generate_error_response(
             status_code=200,
         )
 
+    def _check_content_length(self, request: Request) -> bool:
+        """Checks if the request content length exceeds the maximum allowed size.
+
+        Args:
+            request: The incoming Starlette Request object.
+
+        Returns:
+            True if the content length is within the allowed limit, False otherwise.
+        """
+        if not self._disable_content_length_check:
+            with contextlib.suppress(Exception):
+                content_length = int(request.headers.get('content-length', '0'))
+                if content_length and content_length > MAX_CONTENT_LENGTH:
+                    return False
+        return True
+
     async def _handle_requests(self, request: Request) -> Response:  # noqa: PLR0911
         """Handles incoming POST requests to the main A2A endpoint.
 
@@ -297,20 +313,13 @@ async def _handle_requests(self, request: Request) -> Response:  # noqa: PLR0911
                     request_id = None
             # If content length check is not disabled,
             # treat very large payloads as invalid request (-32600) before routing
-            if not self._disable_content_length_check:
-                with contextlib.suppress(Exception):
-                    content_length = int(
-                        request.headers.get('content-length', '0')
-                    )
-                    if content_length and content_length > MAX_CONTENT_LENGTH:
-                        return self._generate_error_response(
-                            request_id,
-                            A2AError(
-                                root=InvalidRequestError(
-                                    message='Payload too large'
-                                )
-                            ),
-                        )
+            if not self._check_content_length(request):
+                return self._generate_error_response(
+                    request_id,
+                    A2AError(
+                        root=InvalidRequestError(message='Payload too large')
+                    ),
+                )
             logger.debug('Request body: %s', body)
             # 1) Validate base JSON-RPC structure only (-32600 on failure)
             try: