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# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals
import time
from school_api.session import SessionStorage
from school_api.utils import to_text
class MemoryStorage(SessionStorage):
''' 非持久化缓存 不推荐使用'''
def __init__(self):
self._data = {}
def key_name(self, key):
return 'school:{0}'.format(key)
def get(self, key, default=None):
key = self.key_name(key)
value = None
data = self._data.get(key, default)
if data:
if data['expires_at'] is True or data['expires_at'] > time.time():
# 为True时：永不过期， 大于当前时间为：不到过期时间
value = data['value']
else:
self.delete(key)
return value
def set(self, key, value, ttl=None):
if value is None:
return
expires_at = not ttl or time.time() + ttl
data = {'value': value, 'expires_at': expires_at}
self._data[key] = data
def delete(self, key):
self._data.pop(key, None)
def expires_time(self, key):
data = self._data.get(self.key_name(key))
return data['expires_at'] - time.time()
dairoot /
school-api
