52 lines
2.1 KiB
Python
52 lines
2.1 KiB
Python
"""Middleware classes for third_party_auth."""
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import six.moves.urllib.parse
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from django.contrib import messages
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from django.shortcuts import redirect
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from django.urls import reverse
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from django.utils.deprecation import MiddlewareMixin
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from django.utils.translation import gettext as _
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from requests import HTTPError
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from social_django.middleware import SocialAuthExceptionMiddleware
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from common.djangoapps.student.helpers import get_next_url_for_login_page
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from . import pipeline
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class ExceptionMiddleware(SocialAuthExceptionMiddleware, MiddlewareMixin):
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"""Custom middleware that handles conditional redirection."""
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def get_redirect_uri(self, request, exception):
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# Fall back to django settings's SOCIAL_AUTH_LOGIN_ERROR_URL.
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redirect_uri = super().get_redirect_uri(request, exception)
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# Safe because it's already been validated by
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# pipeline.parse_query_params. If that pipeline step ever moves later
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# in the pipeline stack, we'd need to validate this value because it
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# would be an injection point for attacker data.
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auth_entry = request.session.get(pipeline.AUTH_ENTRY_KEY)
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# Check if we have an auth entry key we can use instead
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if auth_entry and auth_entry in pipeline.AUTH_DISPATCH_URLS:
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redirect_uri = pipeline.AUTH_DISPATCH_URLS[auth_entry]
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return redirect_uri
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def process_exception(self, request, exception):
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"""Handles specific exception raised by Python Social Auth eg HTTPError."""
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referer_url = request.META.get('HTTP_REFERER', '')
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if (referer_url and isinstance(exception, HTTPError) and
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exception.response.status_code == 502):
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referer_url = six.moves.urllib.parse.urlparse(referer_url).path
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if referer_url == reverse('signin_user'):
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messages.error(request, _('Unable to connect with the external provider, please try again'),
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extra_tags='social-auth')
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redirect_url = get_next_url_for_login_page(request)
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return redirect('/login?next=' + redirect_url)
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return super().process_exception(request, exception)
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