OAuth2.0 and Facebook (as from the book)

[Sebastian E. Ovide]

Hi All,

just wondering if the section "OAuth2.0 and Facebook" of the book is up to date?

I following it's instructions but I'm getting an "Internal error"

to reproduce

1) get last web2py 1.196.3

2) follow the instructions from the book

2.a) get facebook and place it in modules

2.b) copy the code from the book

2.c) replace "from facebook import GraphAPI" with "facebook = local_import('facebook')"

2.d) replace facebook. to GraphAPIError and GraphAPI

2.e) replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with real data

3) set your app URL to http://localhost:8000/welcome/

Is something missing ?

When I click login, it redirect me to facebook, where I can login, and then it redirects me to http://localhost:8000/welcome/ 

At that point I get an error:

TRACEBACK

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16.

Traceback (most recent call last): File "/home/sebas/Downloads/web2py/gluon/restricted.py", line 184, in restricted exec ccode in environment File "/home/sebas/Downloads/web2py/applications/welcome/controllers/default.py", line 71, in <module> File "/home/sebas/Downloads/web2py/gluon/globals.py", line 137, in <lambda> / self._caller = lambda f: f() File "/home/sebas/Downloads/web2py/applications/welcome/controllers/default.py", line 33, in user return dict(form=auth()) File "/home/sebas/Downloads/web2py/gluon/tools.py", line 1070, in __call__ return getattr(self,args[0])() File "/home/sebas/Downloads/web2py/gluon/tools.py", line 1626, in login user = self.get_or_create_user(table_user._filter_fields(cas_user)) File "/home/sebas/Downloads/web2py/gluon/tools.py", line 1360, in get_or_create_user user = self.db(table_user[username] == keys[username]).select().first() KeyError: 'email'

any ideas , thanks

--
Sebastian E. Ovide

[Michele Comitini]

Hi Sebastian,

copy from this example:

http://code.google.com/r/michelecomitini-facebookaccess/source/browse/#hg%2Fapplications%2FhelloFacebook

and let me know

mic

2011/6/6 Sebastian E. Ovide <sebasti...@gmail.com>

[Sebastian E. Ovide]

Hi Mic,

thanks for that.

actually I've debugged web2py and figure it out for myself. There are two easy ways to fix it (I've tried to add them to the book, but my account doesn't allow me to edit it)

1) set username=False in auth.define_tables() 

2) add  email = user['username']+"@facebook.com" in the return of def get_user

--
Sebastian E. Ovide

[Massimo Di Pierro]

if there is agreement on one, please send me a patch.

On Jun 6, 4:31 pm, "Sebastian E. Ovide" <sebastian.ov...@gmail.com>
wrote:

> Hi Mic,
>
> thanks for that.
>
> actually I've debugged web2py and figure it out for myself. There are two
> easy ways to fix it (I've tried to add them to the book, but my account
> doesn't allow me to edit it)
>
> 1) set username=False in auth.define_tables()
> 2) add  email = user['username']+"@facebook.com" in the return of def
> get_user
>
> On Mon, Jun 6, 2011 at 10:02 PM, Michele Comitini <
>
>
>
>
>
>
>
>
>
> michele.comit...@gmail.com> wrote:
> > Hi Sebastian,
>
> > copy from this example:
>

> >http://code.google.com/r/michelecomitini-facebookaccess/source/browse...
>
> > <http://code.google.com/r/michelecomitini-facebookaccess/source/browse...>and
> > let me know
>
> > mic
>
> > 2011/6/6 Sebastian E. Ovide <sebastian.ov...@gmail.com>

>
> > Hi All,
>
> >> just wondering if the section "OAuth2.0 and Facebook" of the book is up to
> >> date?
>
> >> I following it's instructions but I'm getting an "Internal error"
>
> >> to reproduce
>
> >> 1) get last web2py 1.196.3
> >> 2) follow the instructions from the book
> >> 2.a) get facebook and place it in modules
> >> 2.b) copy the code from the book
> >> 2.c) replace "from facebook import GraphAPI" with "facebook =
> >> local_import('facebook')"
> >> 2.d) replace facebook. to GraphAPIError and GraphAPI
> >> 2.e) replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with real data

> >> 3) set your app URL tohttp://localhost:8000/welcome/

>
> >> Is something missing ?
>
> >> When I click login, it redirect me to facebook, where I can login, and

> >> then it redirects me tohttp://localhost:8000/welcome/

>
> >> At that point I get an error:
>
> >>  TRACEBACK
>
> >> 1.
> >> 2.
> >> 3.
> >> 4.
> >> 5.
> >> 6.
> >> 7.
> >> 8.
> >> 9.
> >> 10.
> >> 11.
> >> 12.
> >> 13.
> >> 14.
> >> 15.
> >> 16.
>
> >> Traceback (most recent call last):
>
> >>   File "/home/sebas/Downloads/web2py/gluon/restricted.py", line 184, in restricted
>
> >>     exec ccode in environment
>

> >>   File "/home/sebas/Downloads/web2py/applications/welcome/controllers/default.py" <http://localhost:8000/admin/default/edit/welcome/controllers/default.py>, line 71, in <module>

>
> >>   File "/home/sebas/Downloads/web2py/gluon/globals.py", line 137, in <lambda>
>
> >>   /  self._caller = lambda f: f()
>

> >>   File "/home/sebas/Downloads/web2py/applications/welcome/controllers/default.py" <http://localhost:8000/admin/default/edit/welcome/controllers/default.py>, line 33, in user

[Sebastian E. Ovide]

I do not see major pros and cons... it is a matter of precerences...

1) setting username=True in auth.define_tables(), define_tables will add a field on the table (username) and if that field is present, authentication will be done using username. Personally I prefer to use emails rather than usernames, and as I am using BOTH web2py auth and facebook at the same  time for authentication (two different links for different logins), I didn't want to force my application to use usernames.... so I've used the second option

2) in this case I'm adding an email created by the facebook username + @facebook and therefore auth will keep using email for authentication...

no web2py code has been touched, although I'm extending Auth and overriding navbar to display a second login link (facebook) and hide change_password when it is logged in via facebook.

            if session.login_method_used is None:

                if not 'change_password' in self.settings.actions_disabled:

                    bar.insert(-1, ' | ')

                    bar.insert(-1, password)

and in my controller:

def user():

    if auth.user_id:

        if request.args[0] == 'logout':

            session.login_method_used=None

    else:

        if request.args[0] == 'login':

            session.login_method_used=None

        elif request.args[0] == 'login_fb':

            session.login_method_used="facebook"

            request.args[0]='login'       

    if session.login_method_used=="facebook":

        auth.settings.login_form=FaceBookAccount(globals())

    return dict(form=auth())

--
Sebastian E. Ovide

[Massimo Di Pierro]

I am not familiar with facebook email.

If this (username + @facebook) is avlid email, perhaps web should set
that even if username=True

On Jun 6, 7:15 pm, "Sebastian E. Ovide" <sebastian.ov...@gmail.com>
wrote:

[Lisandro]

I'm having a similar problem with KeyError: 'email'.

I have a site in production that uses oauth2 and offers the possibility of register/login using personal facebook account. 

I created a Facebook app and set permissions to get user's email (so I can create the account on my site). Everything works perfect, lots of users have registered in my site using their Facebook accounts. Even myself.

However, there are some error tickets created with this error of "KeyError:email". First I thought that some users didn't let the application get their emails, but that's not possible. When you try to log in my site using Facebook, facebook tells you that te application will get your email, and you only can accept or decline. If you decline, you're not registered. And if you accept, my site gets your email and creates the account.

So, I don't know which could be the problem. This is the traceback of the error:

Traceback (most recent call last

):
  File "/var/www/vendosimple/gluon/restricted.py", line 212, in restricted
    exec ccode in environment
  File "/var/www/vendosimple/applications/init/controllers/default.py", line 645, in <module>
  File "/var/www/vendosimple/gluon/globals.py", line 194, in <lambda>
    

self._caller = lambda f: f

()
  File "/var/www/vendosimple/applications/init/controllers/default.py", line 380, in user
    form = auth()
  File "/var/www/vendosimple/gluon/tools.py", line 1250, in __call__
    return getattr(self, args[0])()
  File "/var/www/vendosimple/gluon/tools.py", line 2128, in login
    cas_user = cas.get_user()
  File "applications/init/modules/globales.py", line 41, in get_user
    username=user['id'], registration_id=user['id'], email=user['email'])
KeyError: 'email'

Any ideas? 

[Christian Foster Howes]

the problem is that facebook is not returning an email.

i know, i know, you told facebook that email is required and you can't reproduce such a state.  i'm 100% with you, but i see the exact same behavior with my users!  i suspect that these are actually returning users who granted email access when they first created an account, but then they changed their facebook permissions to remove email access and when they return to your site and login, facebook lets them (because they have before), but does not give you the email address.   i have not confirmed this theory, but it's my running theory.

other potential issue is the expiration of the facebook access token.  those rules changed this spring and i'm not 100% up to date on the rules right now.

cfh

[Lisandro]

I see, your theory is pretty much accurate (sorry for my english, I hope that phrase is correct). What I mean is that your theory is the most addecuate for this case, thought it can't be proved. Actually, there is another error that says something about access token been already used, but happens very little.

My question now is: ¿can I avoid this situation and do something? 

I have this in one of my models:

if session.login_facebook:

    from globales import FaceBookAccount

    auth.settings.login_form = FaceBookAccount(globals())

And this is te dfinition of FaceBookAccount class:

class FaceBookAccount(OAuthAccount):

    AUTH_URL="https://graph.facebook.com/oauth/authorize"

    TOKEN_URL="https://graph.facebook.com/oauth/access_token"

    def __init__(self, g):

        OAuthAccount.__init__(self, g, current.FACEBOOK_APP_ID, current.FACEBOOK_APP_SECRET_KEY, \

          self.AUTH_URL, self.TOKEN_URL, scope='email')

        self.graph = None

    def get_user(self):

        if not self.accessToken():

            return None

        if not self.graph:

            self.graph = GraphAPI((self.accessToken()))

        user = None

        try:

            user = self.graph.get_object("me")

        except GraphAPIError, e:

            self.session.token = None

            self.graph = None

        if user:

            return dict(first_name='%s %s' %(user['first_name'], user['last_name']), \

              username=user['id'], registration_id=user['id'], email=user['email'])

I would like to, at least, show an error message to the user saying that something went wrong trying to get his/her email from Facebook, and that he/she should try again. Can't figure it out how to do it :/

[Michele Comitini]

create a fake email...

something like the following (check for errors I did not test it)

if user:

  if not user.has_key('email') or user['email'] == '' or user['email'] is None:

     user['email'] = user['first_name'] + '.' + user['last_name'] + '.' + user['id'] + '@facebook.email.is.not.valid'

2013/10/29 Lisandro <rostagno...@gmail.com>

--
Resources:
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- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[Lisandro Rostagno]

Thanks for the answer. The problem is that I really need a valid email address, because in my site I use that email to send important notifications to the user. 

I already tried with "facebook mail", that is, joining the user name with "@facebook.com". But it didn't work. When I send an email to a facebook mail, I receive an automatic response from Facebook saying that there is a permission problem. I understand that @facebook email addresses are only for communication between Facebook users :/

2013/10/29 Michele Comitini <michele....@gmail.com>

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[Michele Comitini]

this is what they say:

https://www.facebook.com/help/224049364288051

facebook documentation for developers is incomplete, so to say, on many occasions...

mic

2013/10/29 Lisandro Rostagno <rostagno...@gmail.com>

[Lisandro Rostagno]

Thanks, you're right, Facebook documentation is very poor and is often outdated.  That page says that anyone can send you an email from external mail services (gmail, yahoo, etc).. but I tried that and I receive a response from Facebook saying that there is a permission problem... I suppose that the user can choose not to be contacted outside facebook :/

So in my case, I have no way to avoid this problem. Maybe creating that "fake" email address and asking the user to enter a valid emai addres and then verify it... but that deviates from the goal of "register/login with facebook", that should be a simple and fast method, mostly for the user.

Anyway, thanks a lot for the help and the answers! 

Off the topic, I'm starting to think that Facebook is kind of an ·"internet explorer" experience for developers, where developers have to work extra to cover inconsistency or problems like this :/

[Christian Foster Howes]

Lisandro,

the ratio of users without email is so low that i would just block the
user telling them that they must grant email permissions to use your
site. detect that there was no email returned from facebook and send a
response to the browser that prompts the user to try again and add the
email permission.

in the event that this is the login of an existing user, your database
will already have an email and maybe you prompt them to verify that the
saved email is still correct.

good luck!

cfh

>>>>> escribi�:

>>>>>>> File "/var/www/vendosimple/gluon/**restricted.py", line 212, in restricted
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> exec ccode in environment
>>>>>>> File "/var/www/vendosimple/**applications/init/controllers/**default.py", line 645, in <module>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> File "/var/www/vendosimple/gluon/**globals.py", line 194, in <lambda>

>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> self._caller = lambda f: f()
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>

>>>>>>> File "/var/www/vendosimple/**applications/init/controllers/**default.py", line 380, in user
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> form = auth()
>>>>>>> File "/var/www/vendosimple/gluon/**tools.py", line 1250, in __call__

>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> return getattr(self, args[0])()
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>

>>>>>>> File "/var/www/vendosimple/gluon/**tools.py", line 2128, in login
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> cas_user = cas.get_user()
>>>>>>> File "applications/init/modules/**globales.py", line 41, in get_user

>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> username=user['id'], registration_id=user['id'], email=user['email'])
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> KeyError: 'email'
>>>>>>>
>>>>>>>
>>>>>>> Any ideas?
>>>>>>>
>>>>>>>
>>>>>>> El martes, 7 de junio de 2011 01:00:33 UTC-3, Massimo Di Pierro

>>>>>>> escribi�:

>>>>>>>> **disabled:

>>>>>>>>> bar.insert(-1, ' | ')
>>>>>>>>> bar.insert(-1, password)
>>>>>>>>>
>>>>>>>>> and in my controller:
>>>>>>>>>
>>>>>>>>> def user():
>>>>>>>>> if auth.user_id:
>>>>>>>>> if request.args[0] == 'logout':
>>>>>>>>> session.login_method_used=None
>>>>>>>>> else:
>>>>>>>>> if request.args[0] == 'login':
>>>>>>>>> session.login_method_used=None
>>>>>>>>> elif request.args[0] == 'login_fb':

>>>>>>>>> session.login_method_used="**facebook"
>>>>>>>>> request.args[0]='login'
>>>>>>>>>
>>>>>>>>> if session.login_method_used=="**facebook":
>>>>>>>>> auth.settings.login_form=**FaceBookAccount(globals())

>>>>>>>>>
>>>>>>>>> return dict(form=auth())
>>>>>>>>>
>>>>>>>>> On Mon, Jun 6, 2011 at 11:16 PM, Massimo Di Pierro <
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> massimo.dipie...@gmail.com> wrote:
>>>>>>>>>> if there is agreement on one, please send me a patch.
>>>>>>>>>
>>>>>>>>>> On Jun 6, 4:31 pm, "Sebastian E. Ovide" <
>>>>>>>> sebastian.ov...@gmail.com>
>>>>>>>>>> wrote:
>>>>>>>>>>> Hi Mic,
>>>>>>>>>
>>>>>>>>>>> thanks for that.
>>>>>>>>>
>>>>>>>>>>> actually I've debugged web2py and figure it out for myself.
>>>>>>>> There are two
>>>>>>>>>>> easy ways to fix it (I've tried to add them to the book, but
>>>>>>>> my account
>>>>>>>>>>> doesn't allow me to edit it)
>>>>>>>>>
>>>>>>>>>>> 1) set username=False in auth.define_tables()

>>>>>>>>>>> 2) add email = user['username']+"@facebook.**com<http://facebook.com>"

>>>>>>>> in the return of def
>>>>>>>>>>> get_user
>>>>>>>>>
>>>>>>>>>>> On Mon, Jun 6, 2011 at 10:02 PM, Michele Comitini <
>>>>>>>>>
>>>>>>>>>>> michele.comit...@gmail.com> wrote:
>>>>>>>>>>>> Hi Sebastian,
>>>>>>>>>
>>>>>>>>>>>> copy from this example:
>>>>>>>>>

>>>>>>>>>>>> http://code.google.com/r/**michelecomitini-**
>>>>>>>> facebookaccess/source/browse<http://code.google.com/r/michelecomitini-facebookaccess/source/browse>.
>>>>>>>>
>>>>>>>>>> ..
>>>>>>>>>
>>>>>>>>>>>> <
>>>>>>>>>> http://code.google.com/r/**michelecomitini-**
>>>>>>>> facebookaccess/source/browse<http://code.google.com/r/michelecomitini-facebookaccess/source/browse>..

>>>>>>>>
>>>>>>>>>> .>and
>>>>>>>>>>>> let me know
>>>>>>>>>
>>>>>>>>>>>> mic
>>>>>>>>>
>>>>>>>>>>>> 2011/6/6 Sebastian E. Ovide <sebastian.ov...@gmail.com>
>>>>>>>>>
>>>>>>>>>>>> Hi All,
>>>>>>>>>
>>>>>>>>>>>>> just wondering if the section "OAuth2.0 and Facebook" of
>>>>>>>> the book is
>>>>>>>>>> up to
>>>>>>>>>>>>> date?
>>>>>>>>>
>>>>>>>>>>>>> I following it's instructions but I'm getting an "Internal
>>>>>>>> error"
>>>>>>>>>
>>>>>>>>>>>>> to reproduce
>>>>>>>>>
>>>>>>>>>>>>> 1) get last web2py 1.196.3
>>>>>>>>>>>>> 2) follow the instructions from the book
>>>>>>>>>>>>> 2.a) get facebook and place it in modules
>>>>>>>>>>>>> 2.b) copy the code from the book
>>>>>>>>>>>>> 2.c) replace "from facebook import GraphAPI" with "facebook
>>>>>>>> =
>>>>>>>>>>>>> local_import('facebook')"
>>>>>>>>>>>>> 2.d) replace facebook. to GraphAPIError and GraphAPI
>>>>>>>>>>>>> 2.e) replace YOUR_CLIENT_ID and YOUR_CLIENT_SECRET with
>>>>>>>> real data

>>>>>>>>>>>>> 3) set your app URL tohttp://localhost:8000/**welcome/

>>>>>>>>>
>>>>>>>>>>>>> Is something missing ?
>>>>>>>>>
>>>>>>>>>>>>> When I click login, it redirect me to facebook, where I can
>>>>>>>> login, and

>>>>>>>>>>>>> then it redirects me tohttp://localhost:8000/**welcome/

>>>>>>>>>
>>>>>>>>>>>>> At that point I get an error:
>>>>>>>>>
>>>>>>>>>>>>> TRACEBACK
>>>>>>>>>
>>>>>>>>>>>>> 1.
>>>>>>>>>>>>> 2.
>>>>>>>>>>>>> 3.
>>>>>>>>>>>>> 4.
>>>>>>>>>>>>> 5.
>>>>>>>>>>>>> 6.
>>>>>>>>>>>>> 7.
>>>>>>>>>>>>> 8.
>>>>>>>>>>>>> 9.
>>>>>>>>>>>>> 10.
>>>>>>>>>>>>> 11.
>>>>>>>>>>>>> 12.
>>>>>>>>>>>>> 13.
>>>>>>>>>>>>> 14.
>>>>>>>>>>>>> 15.
>>>>>>>>>>>>> 16.
>>>>>>>>>
>>>>>>>>>>>>> Traceback (most recent call last):
>>>>>>>>>

>>>>>>>>>>>>> File "/home/sebas/Downloads/web2py/**gluon/restricted.py",

>>>>>>>> line 184,
>>>>>>>>>> in restricted
>>>>>>>>>
>>>>>>>>>>>>> exec ccode in environment
>>>>>>>>>
>>>>>>>>>>>>> File

>>>>>>>>>> "/home/sebas/Downloads/web2py/**applications/welcome/**controllers/default.py"
>>>>>>>> <
>>>>>>>>>> http://localhost:8000/admin/**default/edit/welcome/**
>>>>>>>> controllers/default.py<http://localhost:8000/admin/default/edit/welcome/controllers/default.py>>,
>>>>>>>>
>>>>>>>>>> line 71, in <module>
>>>>>>>>>
>>>>>>>>>>>>> File "/home/sebas/Downloads/web2py/**gluon/globals.py",

>>>>>>>> line 137, in
>>>>>>>>>> <lambda>
>>>>>>>>>
>>>>>>>>>>>>> / self._caller = lambda f: f()
>>>>>>>>>
>>>>>>>>>>>>> File

>>>>>>>>>> "/home/sebas/Downloads/web2py/**applications/welcome/**controllers/default.py"
>>>>>>>> <
>>>>>>>>>> http://localhost:8000/admin/**default/edit/welcome/**
>>>>>>>> controllers/default.py<http://localhost:8000/admin/default/edit/welcome/controllers/default.py>>,

>>>>>>>>
>>>>>>>>>> line 33, in user
>>>>>>>>>
>>>>>>>>>>>>> return dict(form=auth())
>>>>>>>>>

>>>>>>>>>>>>> File "/home/sebas/Downloads/web2py/**gluon/tools.py",

>>>>>>>> line 1070, in
>>>>>>>>>> __call__
>>>>>>>>>
>>>>>>>>>>>>> return getattr(self,args[0])()
>>>>>>>>>

>>>>>>>>>>>>> File "/home/sebas/Downloads/web2py/**gluon/tools.py",

>>>>>>>> line 1626, in
>>>>>>>>>> login
>>>>>>>>>
>>>>>>>>>>>>> user =

>>>>>>>>>> self.get_or_create_user(table_**user._filter_fields(cas_user))
>>>>>>>>>
>>>>>>>>>>>>> File "/home/sebas/Downloads/web2py/**gluon/tools.py",

>>>>>>>> line 1360, in
>>>>>>>>>> get_or_create_user
>>>>>>>>>
>>>>>>>>>>>>> user = self.db(table_user[username] ==

>>>>>>>>>> keys[username]).select().**first()

[Lisandro Rostagno]

Thanks very much! That's what I'm gonna do. Regards, Lisandro.

2013/10/29 Christian Foster Howes <cfh...@gmail.com>

escribió:

escribió:

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[Paolo Comitini]

The mobile registration page allows for users to signup without an email address:

http://touch.facebook.com/r.php

Paolo