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from django.conf import settings
from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect, QueryDict
from django.template.response import TemplateResponse
from django.utils.http import base36_to_int, is_safe_url, urlsafe_base64_decode, urlsafe_base64_encode
from django.utils.translation import ugettext as _
from django.utils.six.moves.urllib.parse import urlparse, urlunparse
from django.shortcuts import resolve_url
from django.utils.encoding import force_bytes, force_text
from django.views.decorators.debug import sensitive_post_parameters
from django.views.decorators.cache import never_cache
from django.views.decorators.csrf import csrf_protect
# Avoid shadowing the login() and logout() views below.
from django.contrib.auth import REDIRECT_FIELD_NAME, login as auth_login, logout as auth_logout, get_user_model
from django.contrib.auth.decorators import login_required
from django.contrib.auth.forms import AuthenticationForm, PasswordResetForm, SetPasswordForm, PasswordChangeForm
from django.contrib.auth.tokens import default_token_generator
from django.contrib.sites.models import get_current_site
@sensitive_post_parameters()
@csrf_protect
@never_cache
def login(request, template_name='registration/login.html',
redirect_field_name=REDIRECT_FIELD_NAME,
authentication_form=AuthenticationForm,
current_app=None, extra_context=None):
"""
Displays the login form and handles the login action.
"""
redirect_to = request.REQUEST.get(redirect_field_name, '')
if request.method == "POST":
form = authentication_form(request, data=request.POST)
if form.is_valid():
# Ensure the user-originating redirection url is safe.
if not is_safe_url(url=redirect_to, host=request.get_host()):
redirect_to = resolve_url(settings.LOGIN_REDIRECT_URL)
# Okay, security check complete. Log the user in.
auth_login(request, form.get_user())
return HttpResponseRedirect(redirect_to)
else:
form = authentication_form(request)
current_site = get_current_site(request)
context = {
'form': form,
redirect_field_name: redirect_to,
'site': current_site,
'site_name': current_site.name,
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
def logout(request, next_page=None,
template_name='registration/logged_out.html',
redirect_field_name=REDIRECT_FIELD_NAME,
current_app=None, extra_context=None):
"""
Logs out the user and displays 'You are logged out' message.
"""
auth_logout(request)
if next_page is not None:
next_page = resolve_url(next_page)
if redirect_field_name in request.REQUEST:
next_page = request.REQUEST[redirect_field_name]
# Security check -- don't allow redirection to a different host.
if not is_safe_url(url=next_page, host=request.get_host()):
next_page = request.path
if next_page:
# Redirect to this page until the session has been cleared.
return HttpResponseRedirect(next_page)
current_site = get_current_site(request)
context = {
'site': current_site,
'site_name': current_site.name,
'title': _('Logged out')
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
def logout_then_login(request, login_url=None, current_app=None, extra_context=None):
"""
Logs out the user if he is logged in. Then redirects to the log-in page.
"""
if not login_url:
login_url = settings.LOGIN_URL
login_url = resolve_url(login_url)
return logout(request, login_url, current_app=current_app, extra_context=extra_context)
def redirect_to_login(next, login_url=None,
redirect_field_name=REDIRECT_FIELD_NAME):
"""
Redirects 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))
# 4 views for password reset:
# - password_reset sends the mail
# - password_reset_done shows a success message for the above
# - password_reset_confirm checks the link the user clicked and
# prompts for a new password
# - password_reset_complete shows a success message for the above
@csrf_protect
def password_reset(request, is_admin_site=False,
template_name='registration/password_reset_form.html',
email_template_name='registration/password_reset_email.html',
subject_template_name='registration/password_reset_subject.txt',
password_reset_form=PasswordResetForm,
token_generator=default_token_generator,
post_reset_redirect=None,
from_email=None,
current_app=None,
extra_context=None):
if post_reset_redirect is None:
post_reset_redirect = reverse('password_reset_done')
else:
post_reset_redirect = resolve_url(post_reset_redirect)
if request.method == "POST":
form = password_reset_form(request.POST)
if form.is_valid():
opts = {
'use_https': request.is_secure(),
'token_generator': token_generator,
'from_email': from_email,
'email_template_name': email_template_name,
'subject_template_name': subject_template_name,
'request': request,
}
if is_admin_site:
opts = dict(opts, domain_override=request.get_host())
form.save(**opts)
return HttpResponseRedirect(post_reset_redirect)
else:
form = password_reset_form()
context = {
'form': form,
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
def password_reset_done(request,
template_name='registration/password_reset_done.html',
current_app=None, extra_context=None):
context = {}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
# Doesn't need csrf_protect since no-one can guess the URL
@sensitive_post_parameters()
@never_cache
def password_reset_confirm(request, uidb64=None, token=None,
template_name='registration/password_reset_confirm.html',
token_generator=default_token_generator,
set_password_form=SetPasswordForm,
post_reset_redirect=None,
current_app=None, extra_context=None):
"""
View that checks the hash in a password reset link and presents a
form for entering a new password.
"""
UserModel = get_user_model()
assert uidb64 is not None and token is not None # checked by URLconf
if post_reset_redirect is None:
post_reset_redirect = reverse('password_reset_complete')
else:
post_reset_redirect = resolve_url(post_reset_redirect)
try:
uid = urlsafe_base64_decode(uidb64)
user = UserModel._default_manager.get(pk=uid)
except (TypeError, ValueError, OverflowError, UserModel.DoesNotExist):
user = None
if user is not None and token_generator.check_token(user, token):
validlink = True
if request.method == 'POST':
form = set_password_form(user, request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect(post_reset_redirect)
else:
form = set_password_form(None)
else:
validlink = False
form = None
context = {
'form': form,
'validlink': validlink,
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
def password_reset_confirm_uidb36(request, uidb36=None, **kwargs):
# Support old password reset URLs that used base36 encoded user IDs.
# Remove in Django 1.7
try:
uidb64 = force_text(urlsafe_base64_encode(force_bytes(base36_to_int(uidb36))))
except ValueError:
uidb64 = '1' # dummy invalid ID (incorrect padding for base64)
return password_reset_confirm(request, uidb64=uidb64, **kwargs)
def password_reset_complete(request,
template_name='registration/password_reset_complete.html',
current_app=None, extra_context=None):
context = {
'login_url': resolve_url(settings.LOGIN_URL)
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
@sensitive_post_parameters()
@csrf_protect
@login_required
def password_change(request,
template_name='registration/password_change_form.html',
post_change_redirect=None,
password_change_form=PasswordChangeForm,
current_app=None, extra_context=None):
if post_change_redirect is None:
post_change_redirect = reverse('password_change_done')
else:
post_change_redirect = resolve_url(post_change_redirect)
if request.method == "POST":
form = password_change_form(user=request.user, data=request.POST)
if form.is_valid():
form.save()
return HttpResponseRedirect(post_change_redirect)
else:
form = password_change_form(user=request.user)
context = {
'form': form,
}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
@login_required
def password_change_done(request,
template_name='registration/password_change_done.html',
current_app=None, extra_context=None):
context = {}
if extra_context is not None:
context.update(extra_context)
return TemplateResponse(request, template_name, context,
current_app=current_app)
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