def set_auth(request: Request, user_id: int):
hash_val = __hash_text(str(user_id))
val = f'{user_id}:{hash_val}'
request.add_response_callback(lambda req, resp: __add_cookie_callback(
req, resp, auth_cookie_name, val
))
def login_view(request: Request):
"""Login form.
After successful login redirects to the URL in the query or post
parameter ``next``. By default redirects to the index page.
"""
def set_csrf_token(value, max_age=None):
def set_cookie(request, response):
response.set_cookie('csrf_token',
value=value,
path=request.path,
secure=request.scheme == 'https',
httponly=True,
samesite='Strict',
max_age=max_age)
return set_cookie
next_url = request.params.get('next') or request.route_url('index')
if request.user:
return HTTPFound(location=next_url)
username = ''
failed = False
if 'submit' in request.POST:
username = request.POST.get('username', '')
password = request.POST.get('password', '')
csrf_token = request.POST.get('csrf_token', '')
expected_csrf_token = request.cookies.get('csrf_token', '')
if not hmac.compare_digest(csrf_token, expected_csrf_token):
raise BadCSRFToken()
user = db.user.authenticate(request.db, username, password)
if user:
# Important - at the very least generate a new session id at
# login/logout to prevent session fixation attacks.
request.session.invalidate()
request.user = user
headers = remember(request, user.user_id)
request.add_response_callback(set_csrf_token('', 0))
return HTTPFound(location=next_url, headers=headers)
failed = True
csrf_token = os.urandom(16).hex()
url = request.route_url('login')
request.add_response_callback(set_csrf_token(csrf_token))
return dict(username=username,
next=next_url,
failed=failed,
login_url=url,
csrf_token=csrf_token)
def logout(request: Request):
request.add_response_callback(
lambda req, resp: __delete_cookie_callback(resp, auth_cookie_name))
def set_auth(request: Request, user_id: int):
hash_val = __hash_text(str(user_id))
val = "{}:{}".format(user_id, hash_val)
request.add_response_callback(lambda req, resp: __add_cookie_callback(
req, resp, auth_cookie_name, val))
def request_factory(environ):
environ['HTTP_ACCEPT'] = 'application/json'
request = Request(environ)
request.response = Response()
request.add_response_callback(finish_callback)
return request
