Hi Rohit,

If you are running dev_appserver.py,

make sure the list of Redirect URIs in the Google APIs Console/Api
access section:
https://code.google.com/apis/console/

Contains:
http://localhost:8080/oauth2callback

Note http:// not https://.

If you are running the deployed version, make sure it contains:
https://myappid.appspot.com/oauth2callback
http://myappid.appspot.com/oauth2callback

Or both depending if you enforce SSL if you application.

Hope that helps.

On Mon, Jun 20, 2011 at 8:49 AM, GAE app developer
<[email protected]> wrote:
> Thanks Johan
> Even though I have signed in using my Gmail account it does not seem
> to make any difference. It is displaying the same error.
>
> And also i tried using the oauthdecorator
> 1. when I click on yes or no button for a particular submission it
> requests for login and after I sign in it displays this error:
> OAuth 2.0 error: redirect_uri_mismatch
> The redirect URI in the request did not match a registered redirect
> URI
>
> Can you please tell why this error appears and how to solve this
> On Jun 18, 4:17 am, Johan Euphrosine <[email protected]> wrote:
>> get_current_user() could return None has documented here, if no user
>> is logged 
>> in:http://code.google.com/appengine/docs/python/users/functions.html
>>
>> You could also take a look at the new OAuth2Decorator in
>> google-api-python-client that make dealing with OAuth 2.0 
>> easier:http://code.google.com/p/google-api-python-client/wiki/OAuth2AppEngin...
>>
>> I just published an article on how to use it with Google Tasks API,
>> but that should be easy to translate to Moderator 
>> API:http://googleappengine.blogspot.com/2011/06/getting-started-with-task...
>>
>> On Fri, Jun 17, 2011 at 2:45 PM, GAE app developer
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> <[email protected]> wrote:
>> > Hi,
>>
>> > I am developing an Google app engine application using Moderator API
>> > in python. I am able to retrieve the submissions. I am having an
>> > authentication problem. My code runs locally without any problem but
>> > when I deploy it in Google app engine launcher. It shows the following
>> > error:
>>
>> > 'NoneType' object has no attribute 'user_id'
>> > Traceback (most recent call last):
>> >  File "/base/python_runtime/python_lib/versions/1/google/appengine/
>> > ext/webapp/__init__.py", line 700, in __call__
>> >    handler.get(*groups)
>> >  File "/base/data/home/apps/ktbookstore/3.351197542995528852/
>> > retrieve_list_unique.py", line 107, in get
>> >    f = Flow.get_by_key_name(user.user_id())
>> > AttributeError: 'NoneType' object has no attribute 'user_id'
>>
>> > My code is:
>>
>> > import gflags
>> > import httplib2
>> > import logging
>> > import pprint
>> > import sys
>> > import os
>> > import cgi
>> > import pickle
>>
>> > from apiclient.discovery import build
>> > from oauth2client.file import Storage
>> > from oauth2client.client import AccessTokenRefreshError
>> > from oauth2client.client import OAuth2WebServerFlow
>> > from oauth2client.tools import run
>> > from google.appengine.ext import webapp
>> > from google.appengine.ext.webapp import template
>> > from google.appengine.ext.webapp.util import run_wsgi_app
>> > from google.appengine.ext import db
>> > from google.appengine.api import users
>> > from oauth2client.appengine import CredentialsProperty
>> > from oauth2client.appengine import StorageByKeyName
>> > from google.appengine.ext.webapp.util import login_required
>> > from google.appengine.api import memcache
>> > from oauth2client.appengine import FlowProperty
>>
>> > FLAGS = gflags.FLAGS
>>
>> > FLOW = OAuth2WebServerFlow(
>> >    client_id='My client id',
>> >    client_secret='my client_secret',
>> >    scope='https://www.example.com/oauth2callback',
>> >    user_agent='moderator-cmdline-sample/1.0')
>>
>> > gflags.DEFINE_enum('logging_level', 'ERROR',['DEBUG', 'INFO',
>> > 'WARNING', 'ERROR', 'CRITICAL'],'Set the level of logging detail.')
>>
>> > class Flow(db.Model):   # FlowThreeLegged could also be stored in
>> > memcache.
>> >    flow = FlowProperty()
>>
>> > class Credentials(db.Model):
>> >  credentials = CredentialsProperty()
>>
>> > class ModPage(webapp.RequestHandler):
>> >  def get(self):
>> >    # Let the gflags module process the command-line arguments
>>
>> >    service = build("moderator", "v1", developerKey='my developer
>> > key')
>>
>> > class voteUpdate(webapp.RequestHandler):
>> >  def get(self):
>> >      user = users.get_current_user()
>> >      logging.info(user)
>> >      f = Flow.get_by_key_name(user.user_id())
>> >      if f:
>> >        credentials = f.flow.step2_exchange(self.request.params)
>> >        c = Credentials(key_name=user.user_id(),
>> > credentials=credentials)
>> >        c.put()
>> >        f.delete()
>> >        self.redirect("/")
>> >      else:
>> >        pass
>> >      user = users.get_current_user()
>> >      c = Credentials.get_by_key_name(user.user_id())
>> >      if c:
>> >        http = httplib2.Http()
>> >        http = c.credentials.authorize(http)
>> >      else:
>> >        flow = FlowThreeLegged(
>> >                              consumer_key='',
>> >                              consumer_secret='anonymous',
>> >                              user_agent='google-api-client-python-
>> > moderator-webapp/1.0',
>> >                              domain='anonymous',
>> >                              scope='https://www.googleapis.com/auth/
>> > moderator',
>> >                              xoauth_displayname='Example Web App')
>> >      authorize_url = flow.step1_get_authorize_url(STEP2_URI)
>> >      f = Flow(key_name=user.user_id(), flow=flow)
>> >      f.put()
>> >      self.redirect(authorize_url)
>>
>> >      service = build("moderator", "v1", http=http,developerKey='my
>> > developer key')
>>
>> >      minus=self.request.get("Minus")
>> >      if minus=="":
>> >        self.response.out.write("plus")
>> >        #code which will increment plus vote counter by 1
>> >      else:
>> >        self.response.out.write("minus")
>> >        #code which will increment minus vote counter by 1
>>
>> > application = webapp.WSGIApplication([
>> >  ('/', ModPage),('/vote',voteUpdate)
>> > ], debug=True)
>>
>> > def main():
>> >   run_wsgi_app(application)
>>
>> > if __name__ == '__main__':
>> >  main()
>>
>> > Please help me in finding the solution.
>>
>> > --
>> > You received this message because you are subscribed to the Google Groups 
>> > "Google App Engine" group.
>> > To post to this group, send email to [email protected].
>> > To unsubscribe from this group, send email to 
>> > [email protected].
>> > For more options, visit this group 
>> > athttp://groups.google.com/group/google-appengine?hl=en.
>>
>> --
>> Johan Euphrosine (proppy)
>> Developer Programs Engineer
>> Google Developer Relations
>
> --
> You received this message because you are subscribed to the Google Groups 
> "Google App Engine" group.
> To post to this group, send email to [email protected].
> To unsubscribe from this group, send email to 
> [email protected].
> For more options, visit this group at 
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>
>



-- 
Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

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