blob: d1c9cf821d9b6dacabad8d7c4e34672ea7624d37 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
from base64 import b64decode, b64encode
CONSTS = {
'\x64': {},
'\x65': '',
'\x66': 0,
'\x67': True,
'\x68': False
}
def parse():
pass
class ViewState(object):
def __init__(self, base64_encoded):
self.base64_encoded = base64_encoded
self.raw = b64decode(self.base64_encoded)
self.decoded = None
@property
def body(self):
return self.raw[:2]
def is_valid(self):
format_marker = b'\xff'
version_marker = b'\x01'
preamble = format_marker + version_marker
return self.body == preamble
def decode(self):
if not self.is_valid():
raise Exception('Cannot decode invalid viewstate, bad preamble')
self.decoded = parse(self.body)
return self.decoded
|
