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    <p>I tend to use my own user and session manangement</p> <p>For my web handlers I will attach a decorator called <code>session</code> and one called <code>authorize</code>. The <code>session</code> decorator will attach a session to every request, and the <code>authorize</code> decorator will make sure that the user is authorised.</p> <p>(A word of caution, the authorize decorator is specific to how I develop my applications - the username being the first parameter in most requests).</p> <p>So for example a web handler may look like:</p> <pre><code>class UserProfile(webapp.RequestHandler): @session @authorize def get(self, user): # Do some funky stuff # The session is attached to the self object. someObjectAttachedToSession = self.SessionObj.SomeStuff self.response.out.write("hello %s" % user) </code></pre> <p>In the above code, the <code>session</code> decorator attaches some session stuff that I need based on the cookies that are present on the request. The <code>authorize</code> header will make sure that the user can only access the page if the session is the correct one.</p> <p>The decorators code are below:</p> <pre><code>import functools from model import Session import logging def authorize(redirectTo = "/"): def factory(method): 'Ensures that when an auth cookie is presented to the request that is is valid' @functools.wraps(method) def wrapper(self, *args, **kwargs): #Get the session parameters auth_id = self.request.cookies.get('auth_id', '') session_id = self.request.cookies.get('session_id', '') #Check the db for the session session = Session.GetSession(session_id, auth_id) if session is None: self.redirect(redirectTo) return else: if session.settings is None: self.redirect(redirectTo) return username = session.settings.key().name() if len(args) &gt; 0: if username != args[0]: # The user is allowed to view this page. self.redirect(redirectTo) return result = method(self, *args, **kwargs) return result return wrapper return factory def session(method): 'Ensures that the sessions object (if it exists) is attached to the request.' @functools.wraps(method) def wrapper(self, *args, **kwargs): #Get the session parameters auth_id = self.request.cookies.get('auth_id', '') session_id = self.request.cookies.get('session_id', '') #Check the db for the session session = Session.GetSession(session_id, auth_id) if session is None: session = Session() session.session_id = Session.MakeId() session.auth_token = Session.MakeId() session.put() # Attach the session to the method self.SessionObj = session #Call the handler. result = method(self, *args, **kwargs) self.response.headers.add_header('Set-Cookie', 'auth_id=%s; path=/; HttpOnly' % str(session.auth_token)) self.response.headers.add_header('Set-Cookie', 'session_id=%s; path=/; HttpOnly' % str(session.session_id)) return result return wrapper def redirect(method, redirect = "/user/"): 'When a known user is logged in redirect them to their home page' @functools.wraps(method) def wrapper(self, *args, **kwargs): try: if self.SessionObj is not None: if self.SessionObj.settings is not None: # Check that the session is correct username = self.SessionObj.settings.key().name() self.redirect(redirect + username) return except: pass return method(self, *args, **kwargs) return wrapper </code></pre>
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    1. POSimple User management example for Google App Engine?
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    1. COThanks a lot! It makes sense. However I am troubled all day long if I will have to integrate django just for own user management. As far I get it , webapp only supports google users and all sort of support for that. Any help or advice on this? Can I simply do that without going for Django?
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    2. COThe above code isn't dependent on the Google Users, so you lose some ease of development but you get more control - none of the above requires Django... - All my user management is done without Googles User API (that is for twollo.com, ff.amplifeeder.com etc). I only use Django for template rendering at the moment so there is no requirement for Django either.
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    3. COis this still the preferred way for a customer user management? how is the Session - object implemented, in particular the MakeId() function?
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      1. USMartin Kapfhammer
 

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