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1from google.appengine.api import users
2from google.appengine.ext import webapp
3from google.appengine.ext.webapp.util import run_wsgi_app
4
5openIdProviders = (
6    'Google.com/accounts/o8/id', # shorter alternative: "Gmail.com"
7    'Yahoo.com',
8    'MySpace.com',
9    'AOL.com',
10    'MyOpenID.com',
11    # add more here
12)
13
14class MainHandler(webapp.RequestHandler):
15    def get(self):
16        user = users.get_current_user()
17        if user:  # signed in already
18            self.response.out.write('Hello <em>%s</em>! [<a href="%s">sign out</a>]' % (
19                user.nickname(), users.create_logout_url(self.request.uri)))
20        else:     # let user choose authenticator
21            self.response.out.write('Hello world! Sign in at: ')
22            for p in openIdProviders:
23                p_name = p.split('.')[0] # take "AOL" from "AOL.com"
24                p_url = p.lower()        # "AOL.com" -> "aol.com"
25                self.response.out.write('[<a href="%s">%s</a>]' % (
26                    users.create_login_url(federated_identity=p_url), p_name))
27
28application = webapp.WSGIApplication([
29    ('/', MainHandler),
30], debug=True)
31
32def main():
33    run_wsgi_app(application)
34
35if __name__ == '__main__':
36    main()