librelist archives

Re: [flask] login_required issue when running a Flask app on GAE

From:

mat --

Date:

2010-10-07 @ 07:51

Hi Charlie,
You are absolutely right. The fix is here:
http://code.google.com/appengine/articles/domains.html
After reading again the documentation, I also realized that when restricting
an app to a particular domain name, I needed first to "add" that domain to
my app.
After adding the domain name, the  `Internal Server Error` is gone and all
seems to work just fine :-)
Thanks.
Mat

On Thu, Oct 7, 2010 at 5:36 AM, Charlie Knudsen
<charlie.knudsen@gmail.com>wrote:

> Hi Mat,
> Seems like maybe you my be running into the error described here.
> http://code.google.com/p/googleappengine/issues/detail?id=1058
>
> The fix that is used to work around it is in comment 8, and points to the
> URL below:
> http://code.google.com/appengine/articles/domains.html
>
> Just a guess however.  Hope it helps.
>
> Charlie
>
> On Oct 6, 2010, at 11:43 AM, mat -- <mat88h@gmail.com> wrote:
>
> Hello,
>
> I am new to Flask (and like it a lot). I am having an issue while running a
> Flask-based app on GAE.
>
> I am using the (excellent) boil erplate project template available on
> <http://github.com/kamalgill/flask-appengine-template>
> http://github.com/kamalgill/flask-appengine-template.
>
> The app works just fine when running the app with `dev_appserver.py`.
>
> It also works fine when running `appcfg.py update` --for an app created in
> the "Open to all Google Accounts users" mode.
>
> The issue is seen only for an app that was created in the "Restricted to
> the following Google Apps <http://www.google.com/a> domain" mode, selected
> in the "Authentication Options".
>
> It seems then that any url decorated with @login_required will generate an
> `Internal Server Error`.
>
> Here is an example of the error log I get in GAE admin after visiting an
> url decorated with the@login_required decorator:
>
> Exception on /example/new [GET]
>
> Traceback (most recent call last):
>   File "/base/data/home/apps/flask88/1.345306240891604377/flask/app.py",
line 861, in wsgi_app
>     rv = self.dispatch_request()
>   File "/base/data/home/apps/flask88/1.345306240891604377/flask/app.py",
line 696, in dispatch_request
>     return self.view_functions[rule.endpoint](**req.view_args)
>   File 
"/base/data/home/apps/flask88/1.345306240891604377/application/decorators.py",
line 16, in decorated_view
>     return redirect(users.create_login_url(request.url))
>   File 
"/base/python_runtime/python_lib/versions/1/google/appengine/api/users.py",
line 223, in create_login_url
>     raise NotAllowedError
> NotAllowedError
>
> Code for the /example/new url is as follows:
>
> @app.route('/example/new', methods = ['GET', 'POST'])
> @login_required
> def new_example():
>
>     form = ExampleForm()
>     if form.validate_on_submit():
>         example = ExampleModel(
>                     example_id = form.example_id.data,
>                     example_title = form.example_title.data,
>                     added_by = users.get_current_user()
>                     )
>         example.put()
>         flash('Example successfully saved.')
>         return redirect(url_for('list_examples'))
>     return render_template('new_example.html', form=form)
>
> I don't think this is specific to my app since I can reproduce the same
> issue when deploying on GAE the sample app available on
> <http://github.com/kamalgill/flask-appengine-template>
> http://github.com/kamalgill/flask-appengine-template
>
> Is this an issue with the login_required decorator? Anyone knows how
> to fix this?
>
> Mat
>
>