JSONDecodeError when trying to logging with username and password

[MyDev45]

Hi there!
I'm currently trying to use Matrix to log in a server webpage with username and password. I'm using Python 3 and the appropriate SDK, but I'm facing an issue: Since it looks that I succeed in reaching the server page address, an error occurs when it comes to logging in:

Traceback (most recent call last):
  File "test.py", line 12, in <module>
    token = client.login(username="***", password="***", limit=10, sync=True, device_id=None)
  File "/usr/local/lib/python3.6/dist-packages/matrix_client-0.4.0.dev0-py3.6.egg/matrix_client/client.py", line 278, in login
  File "/usr/local/lib/python3.6/dist-packages/matrix_client-0.4.0.dev0-py3.6.egg/matrix_client/api.py", line 181, in login
  File "/usr/local/lib/python3.6/dist-packages/matrix_client-0.4.0.dev0-py3.6.egg/matrix_client/api.py", line 761, in _send
  File "/home/user/.local/lib/python3.6/site-packages/requests/models.py", line 897, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

My code is really basic:

#!/usr/bin/env python3
from matrix_client.client import MatrixClient
client = MatrixClient("webpage_logging_address")
token = client.login(username="***", password="***", limit=10, sync=True, device_id=None)

I've been searching for a solution for hours, without success. Any idea of why this happens and how to solve the problem?

Thanks a lot,

MyDev

[non-Jedi]

Could you please show the exact value you're using in your code where you currently have "webpage_logging_address"? Also, please list which commit you're using since it appears you aren't using a released version of the library.

[non-Jedi]

Without knowing what version you're using, I can't track the error very precisely, but I'm guessing you're receiving invalid JSON from the server, and the error is coming from this line:

matrix-python-sdk/matrix_client/api.py

Line 752 in 6c50cdd

return response.json()

Regardless of what's causing the underlying issue, we should have error handling there for the situation where invalid JSON is returned. This would also make troubleshooting issues like this significantly easier.