CODEWITHSUNDEEP
pythonpython-3.xmockingpython-requestspython-responses
andrea_crotti
andrea_crotti

Reputation: 3100

Mocking python HTTP request with an Oauth1 certificate

I'm using the python response library to mock a call with requests, but I get this error: 

File "/lib/python3.5/site-packages/requests/api.py", line 110, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/lib/python3.5/site-packages/requests/api.py", line 56, in request
    return session.request(method=method, url=url, **kwargs)
  File "/lib/python3.5/site-packages/requests/sessions.py", line 474, in request
    prep = self.prepare_request(req)
  File "/lib/python3.5/site-packages/requests/sessions.py", line 407, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "/lib/python3.5/site-packages/requests/models.py", line 306, in prepare
    self.prepare_auth(auth, url)
  File "/lib/python3.5/site-packages/requests/models.py", line 518, in prepare_auth
    r = auth(self)
  File "/lib/python3.5/site-packages/requests_oauthlib/oauth1_auth.py", line 88, in __call__
    unicode(r.url), unicode(r.method), None, r.headers)
  File "/lib/python3.5/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 313, in sign
    ('oauth_signature', self.get_oauth_signature(request)))
  File "/lib/python3.5/site-packages/oauthlib/oauth1/rfc5849/__init__.py", line 150, in get_oauth_signature
    sig = self.SIGNATURE_METHODS[self.signature_method](base_string, self)
  File "/lib/python3.5/site-packages/oauthlib/oauth1/rfc5849/signature.py", line 505, in sign_rsa_sha1_with_client
    return sign_rsa_sha1(base_string, client.rsa_key)
  File "/lib/python3.5/site-packages/oauthlib/oauth1/rfc5849/signature.py", line 497, in sign_rsa_sha1
    key = _prepare_key_plus(alg, rsa_private_key)
  File "/lib/python3.5/site-packages/oauthlib/oauth1/rfc5849/signature.py", line 574, in _prepare_key_plus
    return alg.prepare_key(keystr)
  File "/lib/python3.5/site-packages/jwt/algorithms.py", line 169, in prepare_key
    key = load_pem_public_key(key, backend=default_backend())
  File "/lib/python3.5/site-packages/cryptography/hazmat/primitives/serialization.py", line 24, in load_pem_public_key
    return backend.load_pem_public_key(data)
  File "/lib/python3.5/site-packages/cryptography/hazmat/backends/multibackend.py", line 312, in load_pem_public_key
    return b.load_pem_public_key(data)
  File "/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1074, in load_pem_public_key
    self._handle_key_loading_error()
  File "/lib/python3.5/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1289, in _handle_key_loading_error
    raise ValueError("Could not unserialize key data.")
ValueError: Could not unserialize key data

The code I try to mock is the following:

def function_to_test():
        oauth = OAuth1(
            self.consumer_key,
            client_secret=self.consumer_secret,
            resource_owner_key=self.oauth_token,
            resource_owner_secret=self.oauth_token_secret,
            rsa_key=self.rsa_key,
            signature_method=self._signature_method
        )
        return requests.post(url="https://example.com", auth=oauth, cert="/path/to/certificate")

And the testing code:

@responses.activate
def test_token_expired(self):
    responses.add(responses.POST, url='https://example.com/',
                  body='my_expected_result',
                  status=200)
    response = function_to_test()
    self.assertEqual(response.content, 'my_expected_result)

The test is failing with the error displayed above, does it mean that the responses mocking has not worked? Is it related to auth/cert parameters in my requests.post? Am I missing something?

Upvotes: 1

Views: 762

Answers (1)

romgar
romgar

Reputation: 116

I think that your issue is not related to responses library, but to OAuth1 initialisation.

Before even trying to mock the request, OAuth1 fails because he is trying to access the key, which is not probably correctly initialised in your test.

You can either give a fake value for this key, on even mock the OAuth1 object, responses will then be able to mock your call.

We could have expected responses to completely mock the requests call, but it seems that some initialisation still happens before that.

Upvotes: 2

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