Graylog Connector: Sometimes http status code is 200 but there is no returned content

[ngocngoan]

Describe the bug When I send an HTTP POST request to the Graylog API /api/entitylists/preferences/saved-searches, then the error happens:

500: Failed to send POST request to /api/entitylists/preferences/saved-searches with error: Expecting value: line 1 column 1 (char 0)

To Reproduce Steps to reproduce the behavior:

1. Import function send_post_request() from Graylog universal module
2. Send HTTP POST request by instrustion response = await send_post_request( endpoint="/api/entitylists/preferences/saved-searches", data=preferences.model_dump(by_alias=True, exclude_unset=True, mode="json"), )
3. The error shows in the log

Failed to update saved search preference: 500: Failed to send POST request to /api/entitylists/preferences/saved-searches with error: Expecting value: line 1 column 1 (char 0)

4. See the following images:

Screenshots

5. The reason

The response text is empty string. It is the reason why the response.json() command generates the above error.

Screenshots

Expected behavior

Update line 168 from response.json() to response.json() if response.text else None

Container Logs

Traceback (most recent call last):
  File "/path/to/lib/python3.12/site-packages/requests/models.py", line 974, in json
    return complexjson.loads(self.text, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/lib/python3.12/site-packages/simplejson/__init__.py", line 514, in loads
    return _default_decoder.decode(s)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/path/to/lib/python3.12/site-packages/simplejson/decoder.py", line 386, in decode
    obj, end = self.raw_decode(s)
               ^^^^^^^^^^^^^^^^^^
  File "/path/to/lib/python3.12/site-packages/simplejson/decoder.py", line 416, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/path/to/lib/python3.12/site-packages/requests/models.py", line 978, in json
    raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
requests.exceptions.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[taylorwalton]

Hey @ngocngoan Thanks for the in depth troubleshooting and recommended fix, that really helps! I understand that you are experiencing an issue when sending a POST to Graylog using the send_post_request function.

I have no problem implementing your recommend fix, and thanks for providing that. I am curious though as to what intention you have with fetching /api/entitylists/preferences/saved-searches from Graylog as we are not currently leveraging this Graylog endpoint within CoPilot. Could you think of a use case where it would make sense to add some frontend support for the API endpoint of /api/entitylists/preferences/saved-searches?