How to use MongoDB to implement session Storage of web.py
This article will explain in detail how to use MongoDB to achieve session storage in web.py. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.
Web.py is a python web development framework, since it involves web development, then it is inevitable to use session, while the traditional session storage is basically the default on disk, of course, considering the expansion of web front-end computers, we often need to rewrite sessionhandler to customize session storage.
Fromweb.sessionimportStore
Importtime
ClassMongoStore (Store):
Def__init__ (self,db,collection_name):
Self.collection= db[collection _ name]
Def__contains__ (self,key):
Data=self.collection.find_one ({'session_id':key})
Returnbool (data)
Def__getitem__ (self,key):
Now=time.time ()
S=self.collection.find_one ({'session_id':key})
Ifnots:
RaiseKeyError
Else:
S.update ({'attime':now})
Returns
Def__setitem__ (self,key,value):
Now=time.time ()
Value ['attime'] = now
S=self.collection.find_one ({'session_id':key})
How to use MongoDB to implement session Storage of web.py
Ifs:
Value=dict (map (lambdax: (str (x [0]), x [1]), [(kMagnev) for (kmagin v) invalue.iteritems () ifknotin ['_ id']])
S.update (* * value)
Self.collection.save (s)
Else:
Self.collection.insert (value)
Def__delitem__ (self,key):
Self.collection.remove ({'session_id':key})
Defcleanup (self,timeout):
Timeout=timeout/ (24.0 / 60 / 60) # timedeltatakesnumdaysasarg
Last_allowed_time=time.time ()-timeout
Self.collection.remove ({'attime': {' $lt':last_allowed_time}})
Then replace the declaration of using disk for storage in app, using the
Session=web.session.Session (app,MongoStore (db,'sessions'))
Replace:
Session=web.session.Session (app,web.session.DiskStore ('sessions')).
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