forked from ScoDoc/ScoDoc
410 lines
8.8 KiB
Python
410 lines
8.8 KiB
Python
#
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# Extensible User Folder
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#
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# (C) Copyright 2000,2001 The Internet (Aust) Pty Ltd
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# ACN: 082 081 472 ABN: 83 082 081 472
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# All Rights Reserved
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Author: Andrew Milton <akm@theinternet.com.au>
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# $Id: UserCache.py,v 1.16 2003/07/10 21:11:26 akm Exp $
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# Module Level Caches for Various User Operations
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from time import time
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from BTrees.OOBTree import OOBTree
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import threading
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from Acquisition import aq_inner
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from Products.exUserFolder.User import User
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class UserCacheItem:
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lastAccessed=0
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def __init__(self, username, password, cacheable):
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self.username=username
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self.password=password
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self.cacheable=cacheable
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self.lastAccessed=time()
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def touch(self):
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self.lastAccessed=time()
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def __repr__(self):
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return self.username
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class NegativeUserCacheItem(UserCacheItem):
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def __init__(self, username):
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self.username=username
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self.lastAccessed=time()
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class AdvancedCookieCacheItem(UserCacheItem):
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lastAccessed=0
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def __init__(self, username, password):
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self.username=username
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self.password=password
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self.lastAccessed=time()
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class SessionExpiredException(Exception):
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'User Session Expired'
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class UserCache:
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def __init__(self, sessionLength):
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self.sessionLength=sessionLength
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self.cache=OOBTree()
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self.hits=0
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self.fail=0
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self.nouser=0
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self.attempts=0
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self.timeouts=0
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self.cacheStarted=time()
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self.lock=threading.Lock()
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def addToCache(self, username, password, User):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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u = self.cache.items(username)
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if u:
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for x in self.cache[username]:
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self.cache.remove(x)
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except:
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pass
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u = UserCacheItem(username, password, User._getCacheableDict())
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self.cache[username]=u
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finally:
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self.lock.release()
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def getUser(self, caller, username, password, checkpassword=1):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return None
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self.attempts=self.attempts+1
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u = None
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try:
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u = self.cache[username]
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except KeyError:
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self.nouser=self.nouser+1
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return None
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now = time()
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if u:
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if checkpassword and (u.password != password):
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self.fail=self.fail+1
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del self.cache[u.username]
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elif self.sessionLength and (
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(now - u.lastAccessed) > self.sessionLength):
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del self.cache[u.username]
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self.timeouts=self.timeouts+1
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user_object=User(u.cacheable,
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caller.currentPropSource,
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caller.cryptPassword,
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caller.currentAuthSource,
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caller.currentGroupSource)
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user_object.notifyCacheRemoval()
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del u
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raise SessionExpiredException
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else:
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u.touch()
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self.hits=self.hits+1
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return User(u.cacheable,
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caller.currentPropSource,
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caller.cryptPassword,
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caller.currentAuthSource,
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caller.currentGroupSource)
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self.nouser=self.nouser+1
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return None
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finally:
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self.lock.release()
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def removeUser(self, username):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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if self.cache[username]:
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del self.cache[username]
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except:
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pass
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finally:
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self.lock.release()
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def getCacheStats(self):
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self.lock.acquire()
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try:
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return (
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{'attempts':self.attempts,
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'hits':self.hits,
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'fail':self.fail,
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'misses':self.nouser,
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'cachesize':len(self.cache),
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'time':self.cacheStarted,
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'timeouts':self.timeouts,
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'length':self.sessionLength})
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finally:
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self.lock.release()
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def getCurrentUsers(self, caller):
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self.lock.acquire()
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try:
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x=[]
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now = time()
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for z in self.cache.keys():
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u = self.cache[z]
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if self.sessionLength and (
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(now - u.lastAccessed) > self.sessionLength):
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del self.cache[u.username]
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self.timeouts=self.timeouts+1
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user_object=User(u.cacheable,
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caller.currentPropSource,
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caller.cryptPassword,
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caller.currentAuthSource,
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caller.currentGroupSource)
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user_object.notifyCacheRemoval()
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del u
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else:
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x.append({'username':u.username,
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'lastAccessed':u.lastAccessed})
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return x
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finally:
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self.lock.release()
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class NegativeUserCache:
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def __init__(self, sessionLength):
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self.sessionLength=sessionLength
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self.cache=OOBTree()
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self.hits=0
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self.cacheStarted=time()
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self.lock=threading.Lock()
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def addToCache(self, username):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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u = self.cache.items(username)
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if u:
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for x in self.cache[username]:
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self.cache.remove(x)
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except:
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pass
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u = NegativeUserCacheItem(username)
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self.cache[username]=u
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finally:
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self.lock.release()
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def getUser(self, username):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return 0
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u = None
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try:
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u = self.cache[username]
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except KeyError:
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return 0
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now = time()
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if u:
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if self.sessionLength and (
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(now - u.lastAccessed) > self.sessionLength):
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del self.cache[u.username]
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else:
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# We don't touch negative user caches
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# u.touch()
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self.hits=self.hits+1
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return 1
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return 0
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finally:
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self.lock.release()
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def removeUser(self, username):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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del self.cache[username]
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except:
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pass
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finally:
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self.lock.release()
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class CookieCache:
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def __init__(self, sessionLength):
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self.sessionLength=sessionLength
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self.cache=OOBTree()
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self.hits=0
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self.cacheStarted=time()
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self.lock=threading.Lock()
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def addToCache(self, username, password, key):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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u = self.cache.items(key)
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if u:
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for x in self.cache[key]:
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self.cache.remove(x)
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except:
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pass
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u = AdvancedCookieCacheItem(username, password)
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self.cache[key]=u
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finally:
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self.lock.release()
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def getUser(self, key):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return None
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u = None
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try:
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u = self.cache[key]
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except KeyError:
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return None
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now = time()
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if u:
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if self.sessionLength and (
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(now - u.lastAccessed) > self.sessionLength):
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del self.cache[key]
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else:
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# We don't touch negative user caches
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# u.touch()
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self.hits=self.hits+1
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return u.username, u.password
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return None
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finally:
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self.lock.release()
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def removeUser(self, key):
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self.lock.acquire()
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try:
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if not self.sessionLength:
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return
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try:
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del self.cache[key]
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except:
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pass
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finally:
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self.lock.release()
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class GlobalUserCache:
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caches={}
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def __init__(self):
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self.lock = threading.Lock()
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def createCache(self, who, sessionLength):
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self.lock.acquire()
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try:
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self.caches[who]=UserCache(sessionLength)
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return self.caches[who]
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finally:
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self.lock.release()
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def getCache(self, who):
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self.lock.acquire()
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try:
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if self.caches.has_key(who):
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return self.caches[who]
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else:
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return None
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finally:
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self.lock.release()
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def deleteCache(self, who):
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self.lock.acquire()
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try:
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del self.caches[who]
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finally:
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self.lock.release()
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class GlobalNegativeUserCache:
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caches={}
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def __init__(self):
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self.lock = threading.Lock()
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def createCache(self, who, sessionLength):
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self.lock.acquire()
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try:
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self.caches[who]=NegativeUserCache(sessionLength)
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return self.caches[who]
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finally:
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self.lock.release()
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def getCache(self, who):
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self.lock.acquire()
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try:
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if self.caches.has_key(who):
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return self.caches[who]
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else:
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return None
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finally:
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self.lock.release()
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def deleteCache(self, who):
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self.lock.acquire()
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try:
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del self.caches[who]
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finally:
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self.lock.release()
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class GlobalAdvancedCookieCache:
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caches={}
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def __init__(self):
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self.lock = threading.Lock()
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def createCache(self, who, sessionLength):
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self.lock.acquire()
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try:
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self.caches[who]=CookieCache(sessionLength)
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return self.caches[who]
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finally:
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self.lock.release()
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def getCache(self, who):
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self.lock.acquire()
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try:
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if self.caches.has_key(who):
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return self.caches[who]
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else:
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return None
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finally:
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self.lock.release()
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def deleteCache(self, who):
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self.lock.acquire()
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try:
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del self.caches[who]
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finally:
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self.lock.release()
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