Look Behind the Curtain

A Python Zagreb meetup talk about why we should not be afraid of poking into someone else's code.

Transcript

1. Look behind the curtain
   Senko Rašić
   

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5. “When the getDVRConversions is set to True
   it expires conversions automatically.”
   —paid support
   Proprietary software
   

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6. Open Source
   

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14. Sign in with Google *

    *authorized users only
    

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15. from allauth.socialaccount.adapter import \

    DefaultSocialAccountAdapter
    class MyAdapter(DefaultSocialAccountAdapter):
    def is_open_for_signup(self, request):
    return False
    
    

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16. from allauth.socialaccount.adapter import \

    DefaultSocialAccountAdapter
    class MyAdapter(DefaultSocialAccountAdapter):
    def is_open_for_signup(self, req, sociallogin):
    return False
    
    

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17. 
    from allauth.socialaccount.adapter import \

    DefaultSocialAccountAdapter
    class MyAdapter(DefaultSocialAccountAdapter):
    def is_open_for_signup(self, req, sociallogin):
    return False
    

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18. Django Developer Tragedies
    AllAuth won’t log in without SocialAccount,
    but won’t create SocialAccount without signup.
    

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19. We need to go deeper
    

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20. allauth.socialaccount.views.SignupView
    

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21. a.sa.providers.google.views.oauth2_login
    a.sa.providers.oauth2.views.OAuth2LoginView
    ↓
    ↓
    a.sa.providers.google.views.oauth2_callback
    a.sa.providers.oauth2.views.OAuth2CallbackView
    ↓
    allauth.socialaccount.views.SignupView
    

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22. class OAuth2CallbackView(OAuth2View):
    def dispatch(self, request):
    …
    login = self.adapter.complete_login(…)
    …
    return complete_social_login(request, login)
    ↓
    # allauth.socialaccount.helpers
    def _complete_social_login(req, sociallogin):
    …
    if sociallogin.is_existing:
    …
    else:
    ret = _process_signup(req, sociallogin)
    ↓
    # allauth.socialaccount.models
    class SocialLogin(object):
    @property
    def is_existing(self):
    return self.account.pk
    

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24. # a.sa.provider.google.views
    class GoogleOAuth2Adapter(OAuth2Adapter):
    def complete_login(…):
    …
    login = self.get_provider(). \
    sociallogin_from_response(…)
    ↓
    # a.sa.providers.base
    class Provider(object):
    def sociallogin_from_response(…):
    …
    sociallogin.user = adapter.new_user(req, sociallogin)
    …
    ↓
    
    

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26. 
    # allauth.socialaccount.models
    class SocialLogin(object):
    @property
    def is_existing(self):
    return self.account.pk
    

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29. # allauth.socialaccount.helpers
    def complete_social_login(request, sociallogin):
    assert not sociallogin.is_existing
    …
    

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32. 千⾥里里之⾏行行，始於⾜足下
    Debugging of
    thousand lines
    starts with a single step
    

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33. Thank you!
    @senkorasic
    

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