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import datetime
import sys
import uuid
from bson.tz_util import utc
from flask.sessions import SessionInterface, SessionMixin
from werkzeug.datastructures import CallbackDict
__all__ = ("MongoEngineSession", "MongoEngineSessionInterface")
if sys.version_info >= (3, 0):
basestring = str
class MongoEngineSession(CallbackDict, SessionMixin):
def __init__(self, initial=None, sid=None):
def on_update(self):
self.modified = True
CallbackDict.__init__(self, initial, on_update)
self.sid = sid
self.modified = False
class MongoEngineSessionInterface(SessionInterface):
"""SessionInterface for mongoengine"""
def __init__(self, db, collection="session"):
"""
The MongoSessionInterface
:param db: The app's db eg: MongoEngine()
:param collection: The session collection name defaults to "session"
"""
if not isinstance(collection, basestring):
raise ValueError("collection argument should be string or unicode")
class DBSession(db.Document):
sid = db.StringField(primary_key=True)
data = db.DictField()
expiration = db.DateTimeField()
meta = {
"allow_inheritance": False,
"collection": collection,
"indexes": [
{
"fields": ["expiration"],
"expireAfterSeconds": 60 * 60 * 24 * 7 * 31,
}
],
}
self.cls = DBSession
def get_expiration_time(self, app, session):
if session.permanent:
return app.permanent_session_lifetime
if "SESSION_TTL" in app.config:
return datetime.timedelta(**app.config["SESSION_TTL"])
return datetime.timedelta(days=1)
def open_session(self, app, request):
sid = request.cookies.get(app.session_cookie_name)
if sid:
stored_session = self.cls.objects(sid=sid).first()
if stored_session:
expiration = stored_session.expiration
if not expiration.tzinfo:
expiration = expiration.replace(tzinfo=utc)
if expiration > datetime.datetime.utcnow().replace(tzinfo=utc):
return MongoEngineSession(
initial=stored_session.data, sid=stored_session.sid
)
return MongoEngineSession(sid=str(uuid.uuid4()))
def save_session(self, app, session, response):
domain = self.get_cookie_domain(app)
httponly = self.get_cookie_httponly(app)
if not session:
if session.modified:
response.delete_cookie(app.session_cookie_name, domain=domain)
return
expiration = datetime.datetime.utcnow().replace(
tzinfo=utc
) + self.get_expiration_time(app, session)
if session.modified:
self.cls(sid=session.sid, data=session, expiration=expiration).save()
response.set_cookie(
app.session_cookie_name,
session.sid,
expires=expiration,
httponly=httponly,
domain=domain,
)
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