# -*- coding: utf-8 -*-
'''
Provide a simple and efficient mask tool for the id of an object.\n
Always used in url against a spider.
'''
_KEY = 9878676540
_BOX = ['a', 'b', 'h', 't', 'n', 's', 'p', 'q', 'l', 'x']
def mask(n):
_id = int(n)^_KEY
_id = [int(i) for i in list(str(_id))]
return ''.join(map(lambda i: _BOX[i], _id))
def unmask(s):
try:
_s = map(lambda l: _BOX.index(l), list(s))
_n = int(''.join(map(str, _s)))
return _n^_KEY
except:
return s
>>> id = 717
>>> mask(id)
'xlqlpqqhtt'
>>> unmask('xlqlpqqhtt')
717
Diff to Previous Revision
--- revision 3 2010-08-16 07:18:00
+++ revision 4 2010-08-16 07:18:43
@@ -21,3 +21,9 @@
return _n^_KEY
except:
return s
+
+>>> id = 717
+>>> mask(id)
+'xlqlpqqhtt'
+>>> unmask('xlqlpqqhtt')
+717
