def init_session(cookie, user=None):
'''Initiates the session. It uses the cookie passed in (ie the value of
os.environ.get("HTTP_COOKIE", "") loaded into a Cookie.SimpleCookie). Before trying to validate
the session and generating a new session cookie the function first calls clear_old_sessions(),
ensuring only non-expired sessions are validated. If the session validates then it generates
a new session cookie for that session. If anything else happens it creates a new session and
generates a new cookie. The method returns the generated cookie and the session dictionary.'''
clear_old_sessions()
c = cookie
ses_dict = {}
if cookie.has_key('session') and cookie.has_key('session_sig'):
cook = cookie['session'].value
cook_dict = nDDB.decodeDDB(cook)
try:
#print "Content-type: text/html"
#print
logger.writeln('session_id: ', cook_dict['sessionID'])
session = get_session(cook_dict['sessionID'])
logger.writeln('database_session_dict: ', session)
if session:
cookie_check = check_cookie(session['msg_sig'], session['sig_id'],
cook_dict['time'], cook)
else: cookie_check = None
logger.writeln('cookie_check: ', cookie_check)
if cookie_check:
sigID = genSigID()
logger.writeln('sigID: ', sigID)
epochtime = str(time.time())
logger.writeln('epochtime: ', epochtime)
if user == None: user = session['usr_id']
logger.writeln('user: '******'session_id'], sigID, epochtime)
logger.writeln('c: ', c)
logger.writeln('msg_sig: ', msg_sig)
ses_dict = update_session(session['session_id'], sigID, msg_sig, user)
logger.writeln('ses_dict: ', ses_dict)
else:
c, ses_dict = make_new_session()
except Exception, e:
print "Content-type: text/html"
print
print '<h1>Cookie Session Error</h1>'
print e, '<br>'*5
logger.writeln()
logger.writeln('COOKIE SESSION ERROR: ', e)
c, ses_dict = make_new_session()
def verify_session():
'''This method returns True if the current session is valid, False otherwise.'''
cookie = Cookie.SimpleCookie()
cookieHdr = os.environ.get("HTTP_COOKIE", "")
cookie.load(cookieHdr)
if cookie.has_key('session') and cookie.has_key('session_sig'):
cook = cookie['session'].value
cook_dict = nDDB.decodeDDB(cook)
try:
session = get_session(cook_dict['sessionID'])
if session:
return check_cookie(session['msg_sig'], session['sig_id'],
cook_dict['time'], cook)
return False
except:
return False
else:
return False
