360 lines
13 KiB
Python
360 lines
13 KiB
Python
from urllib.parse import urlparse, urlunparse
|
|
|
|
from django.conf import settings
|
|
# Avoid shadowing the login() and logout() views below.
|
|
from django.contrib.auth import (
|
|
REDIRECT_FIELD_NAME, get_user_model, login as auth_login,
|
|
logout as auth_logout, update_session_auth_hash,
|
|
)
|
|
from django.contrib.auth.decorators import login_required
|
|
from django.contrib.auth.forms import (
|
|
AuthenticationForm, PasswordChangeForm, PasswordResetForm, SetPasswordForm,
|
|
)
|
|
from django.contrib.auth.tokens import default_token_generator
|
|
from django.contrib.sites.shortcuts import get_current_site
|
|
from django.core.exceptions import ValidationError
|
|
from django.http import HttpResponseRedirect, QueryDict
|
|
from django.shortcuts import resolve_url
|
|
from django.urls import reverse_lazy
|
|
from django.utils.decorators import method_decorator
|
|
from django.utils.http import is_safe_url, urlsafe_base64_decode
|
|
from django.utils.translation import gettext_lazy as _
|
|
from django.views.decorators.cache import never_cache
|
|
from django.views.decorators.csrf import csrf_protect
|
|
from django.views.decorators.debug import sensitive_post_parameters
|
|
from django.views.generic.base import TemplateView
|
|
from django.views.generic.edit import FormView
|
|
|
|
UserModel = get_user_model()
|
|
|
|
|
|
class SuccessURLAllowedHostsMixin:
|
|
success_url_allowed_hosts = set()
|
|
|
|
def get_success_url_allowed_hosts(self):
|
|
return {self.request.get_host(), *self.success_url_allowed_hosts}
|
|
|
|
|
|
class LoginView(SuccessURLAllowedHostsMixin, FormView):
|
|
"""
|
|
Display the login form and handle the login action.
|
|
"""
|
|
form_class = AuthenticationForm
|
|
authentication_form = None
|
|
redirect_field_name = REDIRECT_FIELD_NAME
|
|
template_name = 'registration/login.html'
|
|
redirect_authenticated_user = False
|
|
extra_context = None
|
|
|
|
@method_decorator(sensitive_post_parameters())
|
|
@method_decorator(csrf_protect)
|
|
@method_decorator(never_cache)
|
|
def dispatch(self, request, *args, **kwargs):
|
|
if self.redirect_authenticated_user and self.request.user.is_authenticated:
|
|
redirect_to = self.get_success_url()
|
|
if redirect_to == self.request.path:
|
|
raise ValueError(
|
|
"Redirection loop for authenticated user detected. Check that "
|
|
"your LOGIN_REDIRECT_URL doesn't point to a login page."
|
|
)
|
|
return HttpResponseRedirect(redirect_to)
|
|
return super().dispatch(request, *args, **kwargs)
|
|
|
|
def get_success_url(self):
|
|
url = self.get_redirect_url()
|
|
return url or resolve_url(settings.LOGIN_REDIRECT_URL)
|
|
|
|
def get_redirect_url(self):
|
|
"""Return the user-originating redirect URL if it's safe."""
|
|
redirect_to = self.request.POST.get(
|
|
self.redirect_field_name,
|
|
self.request.GET.get(self.redirect_field_name, '')
|
|
)
|
|
url_is_safe = is_safe_url(
|
|
url=redirect_to,
|
|
allowed_hosts=self.get_success_url_allowed_hosts(),
|
|
require_https=self.request.is_secure(),
|
|
)
|
|
return redirect_to if url_is_safe else ''
|
|
|
|
def get_form_class(self):
|
|
return self.authentication_form or self.form_class
|
|
|
|
def get_form_kwargs(self):
|
|
kwargs = super().get_form_kwargs()
|
|
kwargs['request'] = self.request
|
|
return kwargs
|
|
|
|
def form_valid(self, form):
|
|
"""Security check complete. Log the user in."""
|
|
auth_login(self.request, form.get_user())
|
|
return HttpResponseRedirect(self.get_success_url())
|
|
|
|
def get_context_data(self, **kwargs):
|
|
context = super().get_context_data(**kwargs)
|
|
current_site = get_current_site(self.request)
|
|
context.update({
|
|
self.redirect_field_name: self.get_redirect_url(),
|
|
'site': current_site,
|
|
'site_name': current_site.name,
|
|
**(self.extra_context or {})
|
|
})
|
|
return context
|
|
|
|
|
|
class LogoutView(SuccessURLAllowedHostsMixin, TemplateView):
|
|
"""
|
|
Log out the user and display the 'You are logged out' message.
|
|
"""
|
|
next_page = None
|
|
redirect_field_name = REDIRECT_FIELD_NAME
|
|
template_name = 'registration/logged_out.html'
|
|
extra_context = None
|
|
|
|
@method_decorator(never_cache)
|
|
def dispatch(self, request, *args, **kwargs):
|
|
auth_logout(request)
|
|
next_page = self.get_next_page()
|
|
if next_page:
|
|
# Redirect to this page until the session has been cleared.
|
|
return HttpResponseRedirect(next_page)
|
|
return super().dispatch(request, *args, **kwargs)
|
|
|
|
def post(self, request, *args, **kwargs):
|
|
"""Logout may be done via POST."""
|
|
return self.get(request, *args, **kwargs)
|
|
|
|
def get_next_page(self):
|
|
if self.next_page is not None:
|
|
next_page = resolve_url(self.next_page)
|
|
elif settings.LOGOUT_REDIRECT_URL:
|
|
next_page = resolve_url(settings.LOGOUT_REDIRECT_URL)
|
|
else:
|
|
next_page = self.next_page
|
|
|
|
if (self.redirect_field_name in self.request.POST or
|
|
self.redirect_field_name in self.request.GET):
|
|
next_page = self.request.POST.get(
|
|
self.redirect_field_name,
|
|
self.request.GET.get(self.redirect_field_name)
|
|
)
|
|
url_is_safe = is_safe_url(
|
|
url=next_page,
|
|
allowed_hosts=self.get_success_url_allowed_hosts(),
|
|
require_https=self.request.is_secure(),
|
|
)
|
|
# Security check -- Ensure the user-originating redirection URL is
|
|
# safe.
|
|
if not url_is_safe:
|
|
next_page = self.request.path
|
|
return next_page
|
|
|
|
def get_context_data(self, **kwargs):
|
|
context = super().get_context_data(**kwargs)
|
|
current_site = get_current_site(self.request)
|
|
context.update({
|
|
'site': current_site,
|
|
'site_name': current_site.name,
|
|
'title': _('Logged out'),
|
|
**(self.extra_context or {})
|
|
})
|
|
return context
|
|
|
|
|
|
def logout_then_login(request, login_url=None):
|
|
"""
|
|
Log out the user if they are logged in. Then redirect to the login page.
|
|
"""
|
|
login_url = resolve_url(login_url or settings.LOGIN_URL)
|
|
return LogoutView.as_view(next_page=login_url)(request)
|
|
|
|
|
|
def redirect_to_login(next, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):
|
|
"""
|
|
Redirect the user to the login page, passing the given 'next' page.
|
|
"""
|
|
resolved_url = resolve_url(login_url or settings.LOGIN_URL)
|
|
|
|
login_url_parts = list(urlparse(resolved_url))
|
|
if redirect_field_name:
|
|
querystring = QueryDict(login_url_parts[4], mutable=True)
|
|
querystring[redirect_field_name] = next
|
|
login_url_parts[4] = querystring.urlencode(safe='/')
|
|
|
|
return HttpResponseRedirect(urlunparse(login_url_parts))
|
|
|
|
|
|
# Class-based password reset views
|
|
# - PasswordResetView sends the mail
|
|
# - PasswordResetDoneView shows a success message for the above
|
|
# - PasswordResetConfirmView checks the link the user clicked and
|
|
# prompts for a new password
|
|
# - PasswordResetCompleteView shows a success message for the above
|
|
|
|
class PasswordContextMixin:
|
|
extra_context = None
|
|
|
|
def get_context_data(self, **kwargs):
|
|
context = super().get_context_data(**kwargs)
|
|
context.update({
|
|
'title': self.title,
|
|
**(self.extra_context or {})
|
|
})
|
|
return context
|
|
|
|
|
|
class PasswordResetView(PasswordContextMixin, FormView):
|
|
email_template_name = 'registration/password_reset_email.html'
|
|
extra_email_context = None
|
|
form_class = PasswordResetForm
|
|
from_email = None
|
|
html_email_template_name = None
|
|
subject_template_name = 'registration/password_reset_subject.txt'
|
|
success_url = reverse_lazy('password_reset_done')
|
|
template_name = 'registration/password_reset_form.html'
|
|
title = _('Password reset')
|
|
token_generator = default_token_generator
|
|
|
|
@method_decorator(csrf_protect)
|
|
def dispatch(self, *args, **kwargs):
|
|
return super().dispatch(*args, **kwargs)
|
|
|
|
def form_valid(self, form):
|
|
opts = {
|
|
'use_https': self.request.is_secure(),
|
|
'token_generator': self.token_generator,
|
|
'from_email': self.from_email,
|
|
'email_template_name': self.email_template_name,
|
|
'subject_template_name': self.subject_template_name,
|
|
'request': self.request,
|
|
'html_email_template_name': self.html_email_template_name,
|
|
'extra_email_context': self.extra_email_context,
|
|
}
|
|
form.save(**opts)
|
|
return super().form_valid(form)
|
|
|
|
|
|
INTERNAL_RESET_URL_TOKEN = 'set-password'
|
|
INTERNAL_RESET_SESSION_TOKEN = '_password_reset_token'
|
|
|
|
|
|
class PasswordResetDoneView(PasswordContextMixin, TemplateView):
|
|
template_name = 'registration/password_reset_done.html'
|
|
title = _('Password reset sent')
|
|
|
|
|
|
class PasswordResetConfirmView(PasswordContextMixin, FormView):
|
|
form_class = SetPasswordForm
|
|
post_reset_login = False
|
|
post_reset_login_backend = None
|
|
success_url = reverse_lazy('password_reset_complete')
|
|
template_name = 'registration/password_reset_confirm.html'
|
|
title = _('Enter new password')
|
|
token_generator = default_token_generator
|
|
|
|
@method_decorator(sensitive_post_parameters())
|
|
@method_decorator(never_cache)
|
|
def dispatch(self, *args, **kwargs):
|
|
assert 'uidb64' in kwargs and 'token' in kwargs
|
|
|
|
self.validlink = False
|
|
self.user = self.get_user(kwargs['uidb64'])
|
|
|
|
if self.user is not None:
|
|
token = kwargs['token']
|
|
if token == INTERNAL_RESET_URL_TOKEN:
|
|
session_token = self.request.session.get(INTERNAL_RESET_SESSION_TOKEN)
|
|
if self.token_generator.check_token(self.user, session_token):
|
|
# If the token is valid, display the password reset form.
|
|
self.validlink = True
|
|
return super().dispatch(*args, **kwargs)
|
|
else:
|
|
if self.token_generator.check_token(self.user, token):
|
|
# Store the token in the session and redirect to the
|
|
# password reset form at a URL without the token. That
|
|
# avoids the possibility of leaking the token in the
|
|
# HTTP Referer header.
|
|
self.request.session[INTERNAL_RESET_SESSION_TOKEN] = token
|
|
redirect_url = self.request.path.replace(token, INTERNAL_RESET_URL_TOKEN)
|
|
return HttpResponseRedirect(redirect_url)
|
|
|
|
# Display the "Password reset unsuccessful" page.
|
|
return self.render_to_response(self.get_context_data())
|
|
|
|
def get_user(self, uidb64):
|
|
try:
|
|
# urlsafe_base64_decode() decodes to bytestring
|
|
uid = urlsafe_base64_decode(uidb64).decode()
|
|
user = UserModel._default_manager.get(pk=uid)
|
|
except (TypeError, ValueError, OverflowError, UserModel.DoesNotExist, ValidationError):
|
|
user = None
|
|
return user
|
|
|
|
def get_form_kwargs(self):
|
|
kwargs = super().get_form_kwargs()
|
|
kwargs['user'] = self.user
|
|
return kwargs
|
|
|
|
def form_valid(self, form):
|
|
user = form.save()
|
|
del self.request.session[INTERNAL_RESET_SESSION_TOKEN]
|
|
if self.post_reset_login:
|
|
auth_login(self.request, user, self.post_reset_login_backend)
|
|
return super().form_valid(form)
|
|
|
|
def get_context_data(self, **kwargs):
|
|
context = super().get_context_data(**kwargs)
|
|
if self.validlink:
|
|
context['validlink'] = True
|
|
else:
|
|
context.update({
|
|
'form': None,
|
|
'title': _('Password reset unsuccessful'),
|
|
'validlink': False,
|
|
})
|
|
return context
|
|
|
|
|
|
class PasswordResetCompleteView(PasswordContextMixin, TemplateView):
|
|
template_name = 'registration/password_reset_complete.html'
|
|
title = _('Password reset complete')
|
|
|
|
def get_context_data(self, **kwargs):
|
|
context = super().get_context_data(**kwargs)
|
|
context['login_url'] = resolve_url(settings.LOGIN_URL)
|
|
return context
|
|
|
|
|
|
class PasswordChangeView(PasswordContextMixin, FormView):
|
|
form_class = PasswordChangeForm
|
|
success_url = reverse_lazy('password_change_done')
|
|
template_name = 'registration/password_change_form.html'
|
|
title = _('Password change')
|
|
|
|
@method_decorator(sensitive_post_parameters())
|
|
@method_decorator(csrf_protect)
|
|
@method_decorator(login_required)
|
|
def dispatch(self, *args, **kwargs):
|
|
return super().dispatch(*args, **kwargs)
|
|
|
|
def get_form_kwargs(self):
|
|
kwargs = super().get_form_kwargs()
|
|
kwargs['user'] = self.request.user
|
|
return kwargs
|
|
|
|
def form_valid(self, form):
|
|
form.save()
|
|
# Updating the password logs out all other sessions for the user
|
|
# except the current one.
|
|
update_session_auth_hash(self.request, form.user)
|
|
return super().form_valid(form)
|
|
|
|
|
|
class PasswordChangeDoneView(PasswordContextMixin, TemplateView):
|
|
template_name = 'registration/password_change_done.html'
|
|
title = _('Password change successful')
|
|
|
|
@method_decorator(login_required)
|
|
def dispatch(self, *args, **kwargs):
|
|
return super().dispatch(*args, **kwargs)
|