Created
September 22, 2011 14:02
-
-
Save lerouxb/1234843 to your computer and use it in GitHub Desktop.
Django Redis JSON Sessions
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# originally from https://github.com/martinrusev/django-redis-sessions | |
# but use json, not pickle | |
import json | |
import pickle | |
import time | |
from redis import Redis | |
from django.utils.encoding import force_unicode | |
from django.contrib.sessions.backends.base import SessionBase, CreateError | |
from django.conf import settings | |
class SessionStore(SessionBase): | |
""" | |
Implements Redis database session store. | |
""" | |
def __init__(self, session_key=None): | |
super(SessionStore, self).__init__(session_key) | |
self.db = Redis( | |
host=getattr(settings, 'SESSION_REDIS_HOST', 'localhost'), | |
port=getattr(settings, 'SESSION_REDIS_PORT', 6379), | |
db=getattr(settings, 'SESSION_REDIS_DB', 0), | |
password=getattr(settings, 'SESSION_REDIS_PASSWORD', None) | |
) | |
def encode(self, session_dict): | |
d = {} | |
for k in session_dict: | |
# hold openid's hand | |
if k.startswith('_yadis') or k.startswith('_openid'): | |
d[k] = pickle.dumps(session_dict[k]) | |
else: | |
d[k] = session_dict[k] | |
return json.dumps(d) | |
def decode(self, session_data): | |
# This mirrors SessionBase.decode()'s convention of catching all errors | |
try: | |
d = json.loads(session_data) | |
for k in d: | |
# hold openid's hand again | |
if k.startswith('_yadis') or k.startswith('_openid'): | |
d[k] = pickle.loads(d[k]) | |
return d | |
except: | |
return {} | |
def load(self): | |
try: | |
data = self.db.get(self.session_key) | |
return self.decode(data) | |
except: | |
self.create() | |
return {} | |
def exists(self, session_key): | |
if self.db.exists(session_key): | |
return True | |
return False | |
def create(self): | |
while True: | |
self.session_key = self._get_new_session_key() | |
try: | |
self.save(must_create=True) | |
except CreateError: | |
continue | |
self.modified = True | |
return | |
def save(self, must_create=False): | |
if must_create and self.exists(self.session_key): | |
raise CreateError | |
data = self.encode(self._get_session(no_load=must_create)) | |
self.db.set(self.session_key, data) | |
self.db.expire(self.session_key, self.get_expiry_age()) | |
# or should this rather be get_expiry_date()? | |
def delete(self, session_key=None): | |
if session_key is None: | |
if self._session_key is None: | |
return | |
session_key = self._session_key | |
try: | |
self.db.delete(session_key) | |
except: | |
pass |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment