110 lines
4.5 KiB
Python
110 lines
4.5 KiB
Python
from django.contrib.auth import REDIRECT_FIELD_NAME, logout
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from django.contrib.auth.views import SuccessURLAllowedHostsMixin
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from django.contrib.auth.mixins import LoginRequiredMixin
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from django.contrib import messages
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from django.conf import settings
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from django.utils import timezone
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from django.utils.http import url_has_allowed_host_and_scheme
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from django.http import HttpResponseRedirect
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from django.shortcuts import resolve_url
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from ..models.session import AuthSession
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class AuthSessionRequiredMixin(SuccessURLAllowedHostsMixin):
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redirect_field_name = REDIRECT_FIELD_NAME
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redirect_authenticated_user = True
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def dispatch(self, request, *args, **kwargs):
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if not request.session["AuthSession"]:
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if request.user.is_authenticated and self.redirect_authenticated_user:
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redirect_to = self.request.POST.get(
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self.redirect_field_name,
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self.request.GET.get(self.redirect_field_name, '')
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)
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url_is_safe = url_has_allowed_host_and_scheme(
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url=redirect_to,
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allowed_hosts=self.get_success_url_allowed_hosts(),
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require_https=self.request.is_secure(),
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)
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url = redirect_to if url_is_safe else resolve_url(
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settings.LOGIN_REDIRECT_URL)
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if url == self.request.path:
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raise ValueError(
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"Redirection loop for authenticated user detected. Check that "
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"your LOGIN_REDIRECT_URL doesn't point to a login page."
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)
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return HttpResponseRedirect(url)
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if not request.user.is_authenticated:
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messages.error(
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request, "Could not identify your login session, please try again.")
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url = resolve_url(settings.LOGIN_URL)
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if params := request.GET.urlencode():
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url += f"?{params}"
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return HttpResponseRedirect(url)
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if request.user.is_authenticated:
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logout(request)
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messages.error(
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request, "This shouldn't happen. Looks like you are logged in *and* logging in. Logged you out, just to be sure. Please try logging in again. Sorry!")
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request.session["AuthSession"] = None
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url = resolve_url(settings.LOGIN_URL)
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if params := request.GET.urlencode():
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url += f"?{params}"
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return HttpResponseRedirect(url)
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try:
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session = AuthSession.objects.get(
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id=request.session["AuthSession"])
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if session.expiry < timezone.now():
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request.session["AuthSession"] = None
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messages.error(
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request, "Your session has expired. Please try logging in again.")
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url = resolve_url(settings.LOGIN_URL)
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if params := request.GET.urlencode():
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url += f"?{params}"
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return HttpResponseRedirect(url)
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except AuthSession.DoesNotExist:
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request.session["AuthSession"] = None
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messages.error(
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request, "You are trying to access a session that doesn't exist...? Please try logging in again.")
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url = resolve_url(settings.LOGIN_URL)
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if params := request.GET.urlencode():
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url += f"?{params}"
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return HttpResponseRedirect(url)
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return super().dispatch(request, *args, **kwargs)
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class OnlyLoggedOutMixin:
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redirect_field_name = REDIRECT_FIELD_NAME
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def dispatch(self, request, *args, **kwargs):
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if request.user.is_authenticated:
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redirect_to = self.request.POST.get(
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self.redirect_field_name,
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self.request.GET.get(self.redirect_field_name, '')
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)
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url_is_safe = url_has_allowed_host_and_scheme(
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url=redirect_to,
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allowed_hosts=self.get_success_url_allowed_hosts(),
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require_https=self.request.is_secure(),
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)
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url = redirect_to if url_is_safe else resolve_url(
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settings.LOGIN_REDIRECT_URL)
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if url == self.request.path:
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raise ValueError(
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"Redirection loop for authenticated user detected. Check that "
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"your LOGIN_REDIRECT_URL doesn't point to a login page."
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)
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return HttpResponseRedirect(url)
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return super().dispatch(request, *args, **kwargs)
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