Remove raw HTML from error message content and improve request ID capture

src/huggingface_hub/errors.py

@@ -45,7 +45,7 @@ class HfHubHTTPError(HTTPError):
     sent back by the server, it will be added to the error message.
 
     Added details:
-    - Request id from "X-Request-Id" header if exists.
+    - Request id from "X-Request-Id" header if exists. If not, fallback to "X-Amzn-Trace-Id" header if exists.
     - Server error message from the header "X-Error-Message".
     - Server error message if we can found one in the response body.
 
@@ -68,7 +68,11 @@ class HfHubHTTPError(HTTPError):
     """
 
     def __init__(self, message: str, response: Optional[Response] = None, *, server_message: Optional[str] = None):
-        self.request_id = response.headers.get("x-request-id") if response is not None else None
+        self.request_id = (
+            response.headers.get("x-request-id") or response.headers.get("X-Amzn-Trace-Id")
+            if response is not None
+            else None
+        )
         self.server_message = server_message
 
         super().__init__(

src/huggingface_hub/utils/_http.py

@@ -507,8 +507,9 @@ def _format(error_type: Type[HfHubHTTPError], custom_message: str, response: Res
                     server_errors.append(error["message"])
 
     except JSONDecodeError:
-        # Case error is directly returned as text
-        if response.text:
+        # If content is not JSON and not HTML, append the text
+        content_type = response.headers.get("Content-Type", "")
+        if response.text and "html" not in content_type.lower():
             server_errors.append(response.text)
 
     # Strip all server messages
@@ -528,11 +529,16 @@ def _format(error_type: Type[HfHubHTTPError], custom_message: str, response: Res
             final_error_message += "\n" + server_message
         else:
             final_error_message += "\n\n" + server_message
-
     # Add Request ID
     request_id = str(response.headers.get(X_REQUEST_ID, ""))
-    if len(request_id) > 0 and request_id.lower() not in final_error_message.lower():
+    if request_id:
         request_id_message = f" (Request ID: {request_id})"
+    else:
+        # Fallback to X-Amzn-Trace-Id
+        request_id = str(response.headers.get(X_AMZN_TRACE_ID, ""))
+        if request_id:
+            request_id_message = f" (Amzn Trace ID: {request_id})"
+    if request_id and request_id.lower() not in final_error_message.lower():
         if "\n" in final_error_message:
             newline_index = final_error_message.index("\n")
             final_error_message = (

tests/test_utils_errors.py

@@ -11,7 +11,7 @@
     RepositoryNotFoundError,
     RevisionNotFoundError,
 )
-from huggingface_hub.utils._http import REPO_API_REGEX, X_REQUEST_ID, _format, hf_raise_for_status
+from huggingface_hub.utils._http import REPO_API_REGEX, X_AMZN_TRACE_ID, X_REQUEST_ID, _format, hf_raise_for_status
 
 
 class TestErrorUtils(unittest.TestCase):
@@ -257,6 +257,20 @@ def test_hf_hub_http_error_init_with_error_message_duplicated_in_header_and_body
         assert str(error) == "this is a message\n\nError message duplicated in headers and body."
         assert error.server_message == "Error message duplicated in headers and body."
 
+    def test_hf_hub_http_error_without_request_id_with_amzn_trace_id(self) -> None:
+        """Test request id is not duplicated in error message (case insensitive)"""
+        self.response.headers = {X_AMZN_TRACE_ID: "test-trace-id"}
+        error = _format(HfHubHTTPError, "this is a message", response=self.response)
+        assert str(error) == "this is a message (Amzn Trace ID: test-trace-id)"
+        assert error.request_id == "test-trace-id"
+
+    def test_hf_hub_http_error_with_request_id_and_amzn_trace_id(self) -> None:
+        """Test request id is not duplicated in error message (case insensitive)"""
+        self.response.headers = {X_AMZN_TRACE_ID: "test-trace-id", X_REQUEST_ID: "test-id"}
+        error = _format(HfHubHTTPError, "this is a message", response=self.response)
+        assert str(error) == "this is a message (Request ID: test-id)"
+        assert error.request_id == "test-id"
+
 
 @pytest.mark.parametrize(
     ("url", "should_match"),