Google oauth2 authentication throws an exception in rauth

Hi,

I have implemented google oauth2 today. I was expecting it to work as simple as facebook, but I get an exception in rauth when I try to get the session.

def google_login():
    redirect_uri = url_for('google_authorized', _external=True)
    params = {'redirect_uri': redirect_uri, 'response_type': 'code', 'scope': 'email'}
    return redirect(google_oauth2.get_authorize_url(**params))

def google_authorized():
    if not 'code' in request.args:
        flash('Whoops. You did not authorize the request. Try again.', 'warning')
        return redirect(url_for('index'))

    redirect_uri = url_for('google_authorized', _external=True)
    data = dict(code=request.args['code'], redirect_uri=redirect_uri)

    gg_session = google_oauth2.get_auth_session(data=data)

I can see the code with a long value in request.args. I wonder what else is missing, to get this exception and error:

KeyError: 'Decoder failed to handle access_token with data as returned by provider. A different decoder may be needed. Provider returned: {\n "error" : "invalid_request"\n}'

Trace:

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1701, in __call__

    return self.wsgi_app(environ, start_response)

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1689, in wsgi_app

    response = self.make_response(self.handle_exception(e))

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1687, in wsgi_app

    response = self.full_dispatch_request()

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1360, in full_dispatch_request

    rv = self.handle_user_exception(e)

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1358, in full_dispatch_request

    rv = self.dispatch_request()

    File "/home/hooman/workspace/F11A/src/lib/flask/app.py", line 1344, in dispatch_request

    return self.view_functions[rule.endpoint](**req.view_args)

    File "/home/hooman/workspace/F11A/src/application/views.py", line 433, in google_authorized

    gg_session = google_oauth2.get_auth_session(data=data)

    File "/home/hooman/workspace/F11A/src/lib/rauth/service.py", line 505, in get_auth_session

    return self.get_session(self.get_access_token(method, **kwargs))

    File "/home/hooman/workspace/F11A/src/lib/rauth/service.py", line 491, in get_access_token

    access_token, = process_token_request(r, decoder, key)

    File "/home/hooman/workspace/F11A/src/lib/rauth/service.py", line 25, in process_token_request

    raise KeyError(PROCESS_TOKEN_ERROR.format(key=bad_key, raw=r.content))

[maxcountryman]

The method is fine, but you need to pass in a JSON decoder because the endpoint is returning a JSON blob. This is covered in the rauth API documentation and the error message also indicates that a different decoder is likely needed; the default is indicated by the spec.

service.get_auth_session(data=data, decoder=json.loads)

Alternatively you can use the raw request object, like you did.

[maxcountryman]

I would like to see the exact code that’s failing: if you examine the actual codepath, there is no difference between calling get_auth_session(data=data, decoder=json.loads) and get_raw_access_token(data=data, decoder=json.loads) (in fact, get_auth_session calls get_raw_access_token) apart from the fact that the return values are different, of course. In other words, I shouldn’t be possible for one to work and the other to not.

In order to see what is going on, please isolate the problem into a reproducible case so we can take a look at it.