[web2py] clearing session files with 'remember me'

[Bob_in_Comox]

using 1.87.3

The script to remove old session files assumes a 1 hour expiration.
Sessions with 'remember me' have 30 day expirations. The following
unpacks the session data from the file to check for this (no logging):

EXPIRATION_MINUTES=60
import os, time, stat, cPickle
path = os.path.join(request.folder, 'sessions')
if not os.path.exists(path):
        os.mkdir(path)
now = time.time()
for file in os.listdir(path):
        filename = os.path.join(path, file)
        if os.path.isfile(filename) and
file.startswith(('1','2','3','4','5','6','7','8','9')):
                try:
                        t = os.stat(filename)[stat.ST_MTIME]
                        f = open(filename, 'rb+')
                        session_data = cPickle.load(f)
                        f.close()
                except:
                        continue
                try:
                        expiration = session_data['auth']['expiration']
                except:
                        expiration = EXPIRATION_MINUTES * 60
                if (now - t) > expiration:
                        try:
                                os.unlink(filename)
                        except:
                                pass