78 lines
3.4 KiB
Python
78 lines
3.4 KiB
Python
import time
|
|
from importlib import import_module
|
|
|
|
from django.conf import settings
|
|
from django.contrib.sessions.backends.base import UpdateError
|
|
from django.contrib.sessions.exceptions import SessionInterrupted
|
|
from django.utils.cache import patch_vary_headers
|
|
from django.utils.deprecation import MiddlewareMixin
|
|
from django.utils.http import http_date
|
|
|
|
|
|
class SessionMiddleware(MiddlewareMixin):
|
|
def __init__(self, get_response):
|
|
super().__init__(get_response)
|
|
engine = import_module(settings.SESSION_ENGINE)
|
|
self.SessionStore = engine.SessionStore
|
|
|
|
def process_request(self, request):
|
|
session_key = request.COOKIES.get(settings.SESSION_COOKIE_NAME)
|
|
request.session = self.SessionStore(session_key)
|
|
|
|
def process_response(self, request, response):
|
|
"""
|
|
If request.session was modified, or if the configuration is to save the
|
|
session every time, save the changes and set a session cookie or delete
|
|
the session cookie if the session has been emptied.
|
|
"""
|
|
try:
|
|
accessed = request.session.accessed
|
|
modified = request.session.modified
|
|
empty = request.session.is_empty()
|
|
except AttributeError:
|
|
return response
|
|
# First check if we need to delete this cookie.
|
|
# The session should be deleted only if the session is entirely empty.
|
|
if settings.SESSION_COOKIE_NAME in request.COOKIES and empty:
|
|
response.delete_cookie(
|
|
settings.SESSION_COOKIE_NAME,
|
|
path=settings.SESSION_COOKIE_PATH,
|
|
domain=settings.SESSION_COOKIE_DOMAIN,
|
|
samesite=settings.SESSION_COOKIE_SAMESITE,
|
|
)
|
|
patch_vary_headers(response, ("Cookie",))
|
|
else:
|
|
if accessed:
|
|
patch_vary_headers(response, ("Cookie",))
|
|
if (modified or settings.SESSION_SAVE_EVERY_REQUEST) and not empty:
|
|
if request.session.get_expire_at_browser_close():
|
|
max_age = None
|
|
expires = None
|
|
else:
|
|
max_age = request.session.get_expiry_age()
|
|
expires_time = time.time() + max_age
|
|
expires = http_date(expires_time)
|
|
# Save the session data and refresh the client cookie.
|
|
# Skip session save for 5xx responses.
|
|
if response.status_code < 500:
|
|
try:
|
|
request.session.save()
|
|
except UpdateError:
|
|
raise SessionInterrupted(
|
|
"The request's session was deleted before the "
|
|
"request completed. The user may have logged "
|
|
"out in a concurrent request, for example."
|
|
)
|
|
response.set_cookie(
|
|
settings.SESSION_COOKIE_NAME,
|
|
request.session.session_key,
|
|
max_age=max_age,
|
|
expires=expires,
|
|
domain=settings.SESSION_COOKIE_DOMAIN,
|
|
path=settings.SESSION_COOKIE_PATH,
|
|
secure=settings.SESSION_COOKIE_SECURE or None,
|
|
httponly=settings.SESSION_COOKIE_HTTPONLY or None,
|
|
samesite=settings.SESSION_COOKIE_SAMESITE,
|
|
)
|
|
return response
|