Handling Sessions on Google App Engine with Android/IPhone

Question

I\'m starting to write an app whereby a mobile app (Android/IPhone) will communicate with the GAE backend (Python) through a series of Web API calls using JSON.

I can\'t

Answer 1

I think you should use features webapp2 providing to implement your custom registration.

from webapp2_extras import auth
from google.appengine.api import users

class RegisterHandler(webapp2.RequestHandler):
    def post(self):
        email=self.request.POST['email']
        password=self.request.POST['password']

        #Let webapp2 handle register and manage session
        user = auth.get_auth().store.user_model.create_user('own:'+str(email), password_raw=password,email=email)
        #user (True, User(key=Key('User', 80001), auth_ids=[u'own:useremail@mail.com'],email='useremail@mail.com',password=u'hashed_password',...))

        if not user[0]: #user is a tuple
            self.response.write(user[1]) # Error message
        else:
            #You can extend your User Model e.g UserProfile(User): or have a UserProperty in your profile model as the example.  
            profile=UserProfile(user=users.User(user[1].email)).put()

            self.response.write(str(profile.key()))
class LoginHandler(webapp2.RequestHandler): 

    def post(self):

        email = self.request.POST.get('email')
        email = self.request.POST.get('password')
        # Try to login user with password
        # Raises InvalidAuthIdError if user is not found
        # Raises InvalidPasswordError if provided password doesn't match with specified user
        try:
            auth.get_auth().get_user_by_password('own:'+email, password)
            #Return user_session with User id, 
        except InvalidPasswordError, InvalidAuthIdError:
            #Error

You can check user logged in by:

if auth.get_user_by_session():
    #Logged in      
else:
    #Not logged in

On your client application(Android, IOS). You only have to store the response cookie and send it for every sub sequence requests.

Good luck :)