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linode.errors.ApiError: 400: Invalid JSON; from null json

See original GitHub issue

Hello!

Not really sure if this is a problem with the api-wrapper or the actual api itself since this error just started happening today and I haven’t upgraded the wrapper since I last ran the same script successfully. Either way, when I use get_instances I get a stacktrace;

>>> c = linode.LinodeClient(supersecretkeygoeshere)
>>> linodes = c.linode.get_instances(linode.Linode.label == 'name of a linode')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/emil/code/jenkins-scripts/env/lib/python2.7/site-packages/linode/linode_client.py", line 31, in get_instances
    return self.client._get_and_filter(Linode, *filters)
  File "/Users/emil/code/jenkins-scripts/env/lib/python2.7/site-packages/linode/linode_client.py", line 656, in _get_and_filter
    return self._get_objects(obj_type.api_list(), obj_type, filters=parsed_filters)
  File "/Users/emil/code/jenkins-scripts/env/lib/python2.7/site-packages/linode/linode_client.py", line 487, in _get_objects
    response_json = self.get(endpoint, model=model, filters=filters)
  File "/Users/emil/code/jenkins-scripts/env/lib/python2.7/site-packages/linode/linode_client.py", line 503, in get
    return self._api_call(*args, method=requests.get, **kwargs)
  File "/Users/emil/code/jenkins-scripts/env/lib/python2.7/site-packages/linode/linode_client.py", line 477, in _api_call
    raise ApiError(error_msg, status=response.status_code, json=j)
linode.errors.ApiError: 400: Invalid JSON;

After digging down in linode_client.py it seems like the problem happens when the client sends empty json to the api:

def _api_call(self, endpoint, model=None, method=None, data=None, filters=None):
    ....
    body = json.dumps(data) # evaluates to null if data is omitted/None
    response = method(url, headers=headers, data=body)

I did a simple hack to get everything up and running again (check if data is None and if it is don’t send the body through method() and that works but feels pretty hackish.