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__id__ = '$Id$'
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__modulename__ = '_sessionutils'
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import sha
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import hmac
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import threading
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from time import time
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from random import Random
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from types import BooleanType
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from harmonious import server
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class Session:
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def __init__(self):
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self.__id = ''
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self.attrs = {}
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self.__persistent = False
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self.expires = ''
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self.__removed = False
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def _set_id(self, id):
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self.__id = id
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def get_id(self):
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return self.__id
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def set_persistent(self, flag):
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if type(flag) == BooleanType:
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self.__persistent = flag
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def get_persistent(self):
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return self.__persistent
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def set_removed(self):
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self.__removed = True
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server._sessionStore.remove_session(self.__id)
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def get_removed(self):
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return self.__removed
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class SessionStorage:
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def __init__(self, type):
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# type is ['ram', 'file', 'cookie']
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# TODO: Implement locking. An instance of this class with be shared across all threads
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# TODO: We need a cleanup method called every n houres
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self.__type = str(type).lower()
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self.__lock = threading.Lock()
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if self.__type == 'ram':
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self.__store = {}
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def has_expired(self, sessionId):
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if not self.has_session(sessionId):
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return True
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self.__lock.acquire()
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if self.__store[sessionId]['expirationDate'] <= int(time()) and self.__store[sessionId]['persistent'] == False:
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self.__lock.release()
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return True
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self.__lock.release()
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return False
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def has_session(self, sessionId):
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self.__lock.acquire()
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if self.__store.has_key(sessionId):
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self.__lock.release()
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return True
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self.__lock.release()
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return False
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def remove_session(self, sessionId):
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if self.has_session(sessionId):
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self.__lock.acquire()
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self.__store.pop(sessionId)
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self.__lock.release()
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def store_session(self, sessionId=None, expirationDate=None):
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self.__lock.acquire()
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self.__store[sessionId] = {'expirationDate': 0, 'attrs': {}, 'persistent': False}
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self.__store[sessionId]['expirationDate'] = int(time() + (expirationDate * 60))
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self.__lock.release()
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if self.__type == 'file':
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pass
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# self.__flush_file()
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def set_persistent(self, sessionId, flag):
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if self.has_session(sessionId):
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self.__lock.acquire()
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self.__store[sessionId]['persistent'] = flag
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self.__lock.release()
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def load_session(self, sessionId):
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if self.__type == 'ram':
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self.__lock.acquire()
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if self.__store.has_key(sessionId):
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self.__lock.release()
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if self.has_expired(sessionId):
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self.__lock.acquire()
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self.__store.pop(sessionId)
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self.__lock.release()
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return None
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self.__lock.acquire()
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x = self.__store[sessionId]
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self.__lock.release()
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return x
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else:
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self.__lock.release()
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return None
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def update_session(self, sessionId, **args):
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self.__lock.acquire()
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if sessionId in self.__store.keys():
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for key in args.keys():
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if key in self.__store[sessionId].keys():
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self.__store[sessionId][key] = args[key]
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elif key in self.__store[sessionId]['attrs'].keys():
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self.__store[sessionId]['attrs'][key] = args[key]
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else:
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self.__store[sessionId]['attrs'][key] = args[key]
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self.__lock.release()
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def gen_hash(sid):
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return hmac.new(server.config.server['SecretKey'], sid, sha).hexdigest()[:10]
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def _gen_sid(client_addr, host):
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ran = Random()
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return sha.new(str(time() * ran.randint(0, 10000000000000000000000000)) + \
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str(client_addr) + str(host)).hexdigest()
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# TODO: Just using the client IP addr isn't great.
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def gen_session_id(client_addr, host):
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sid = _gen_sid(client_addr, host)
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return sid + gen_hash(sid)
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