jsunpack.py

"""
    urlresolver XBMC Addon
    Copyright (C) 2011 t0mm0

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""
import re

def unpack(sJavascript):
    aSplit = sJavascript.split(";',")
    p = str(aSplit[0])
    aSplit = aSplit[1].split(',')
    a = int(aSplit[0])
    c = int(aSplit[1])
    k = aSplit[2].split('.')[0].replace("'", '').split('|')
    e = ''
    d = ''
    sUnpacked = str(__unpack(p, a, c, k, e, d))
    return sUnpacked.replace('\\', '')


def __unpack(p, a, c, k, e, d):
    while c > 1:
        c = c - 1
        if k[c]:
            p = re.sub('\\b' + str(__itoa(c, a)) + '\\b', k[c], p)

    return p


def __itoa(num, radix):
    result = ''
    while num > 0:
        result = '0123456789abcdefghijklmnopqrstuvwxyz'[num % radix] + result
        num /= radix

    return result