使用mongodb来实现web.py的session
from web.session import Storeimport timeclass MongoStore(Store): def __init__(self, db, collection_name): self.collection = db def __contains__(self, key): data = self.collection.find_one({'session_id':key}) return bool(data) def __getitem__(self, key): now = time.time() s = self.collection.find_one({'session_id':key}) if not s: raise KeyError else: s.update({'attime':now}) return s def __setitem__(self, key, value): now = time.time() value['attime'] = now s = self.collection.find_one({'session_id':key}) if s: value = dict(map(lambda x: (str(x), x), [(k,v) for (k,v) in value.iteritems() if k not in ['_id']])) s.update(**value) self.collection.save(s) else: self.collection.insert(value) def __delitem__(self, key): self.collection.remove({'session_id':key}) def cleanup(self, timeout): timeout = timeout/(24.0*60*60) #timedelta takes numdays as arg last_allowed_time = time.time() - timeout self.collection.remove({'attime' : { '$lt' : last_allowed_time}})在你的app中使用
session = web.session.Session(app, MongoStore(db, 'sessions'))
代替
session = web.session.Session(app, web.session.DiskStore('sessions'))
DiskStore是直接进行磁盘io操作的，性能很低，而mongodb操作相当于内存操作了。
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