_ Git - youtube-dl/blob - devscripts/youtube_genalgo.py

   1 #!/usr/bin/env python
   2
   3 # Generate youtube signature algorithm from test cases
   4
   5 import sys
   6
   7 tests = [
   8     # 92 - vflQw-fB4 2013/07/17
   9     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`~\"",
  10      "mrtyuioplkjhgfdsazxcvbnq1234567890QWERTY}IOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]\"|:;"),
  11     # 90
  12     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`",
  13      "mrtyuioplkjhgfdsazxcvbne1234567890QWER[YUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={`]}|"),
  14     # 89
  15     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'",
  16      "/?;:|}<[{=+-_)(*&^%$#@!MqBVCXZASDFGHJKLPOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuyt"),
  17     # 88
  18     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<",
  19      "J:|}][{=+-_)(*&;%$#@>MNBVCXZASDFGH^KLPOIUYTREWQ0987654321mnbvcxzasdfghrklpoiuytej"),
  20     # 87
  21     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>.<",
  22      "uioplkjhgfdsazxcvbnm1t34567890QWE2TYUIOPLKJHGFDSAZXCVeNM!@#$^&*()_-+={[]}|:;?/>.<"),
  23     # 86
  24     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<",
  25      "yuioplkjhgfdsazecvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<"),
  26     # 85
  27     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?/>.<",
  28      ".>/?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWQ0q876543r1mnbvcx9asdfghjklpoiuyt2"),
  29     # 84
  30     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?>.<",
  31      "<.>?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWQ09876543q1mnbvcxzasdfghjklpoiuew2"),
  32     # 83
  33     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/>.<",
  34      ".>/?;}[{=+_)(*&^%<#!MNBVCXZASPFGHJKLwOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuytreq"),
  35     # 82
  36     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.<",
  37      "Q>/?;}[{=+-(*<^%$#@!MNBVCXZASDFGHKLPOIUY8REWT0q&7654321mnbvcxzasdfghjklpoiuytrew9"),
  38     # 81 - vflLC8JvQ 2013/07/25
  39     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.",
  40      "C>/?;}[{=+-(*&^%$#@!MNBVYXZASDFGHKLPOIU.TREWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"),
  41     # 79 - vflLC8JvQ 2013/07/25 (sporadic)
  42     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/",
  43      "Z?;}[{=+-(*&^%$#@!MNBVCXRASDFGHKLPOIUYT/EWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"),
  44 ]
  45
  46 tests_age_gate = [
  47     # 86 - vflqinMWD
  48     ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<",
  49      "ertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!/#$%^&*()_-+={[|};?@"),
  50 ]
  51
  52 def find_matching(wrong, right):
  53     idxs = [wrong.index(c) for c in right]
  54     return compress(idxs)
  55     return ('s[%d]' % i for i in idxs)
  56
  57 def compress(idxs):
  58     def _genslice(start, end, step):
  59         starts = '' if start == 0 else str(start)
  60         ends = ':%d' % (end+step)
  61         steps = '' if step == 1 else (':%d' % step)
  62         return 's[%s%s%s]' % (starts, ends, steps)
  63
  64     step = None
  65     for i, prev in zip(idxs[1:], idxs[:-1]):
  66         if step is not None:
  67             if i - prev == step:
  68                 continue
  69             yield _genslice(start, prev, step)
  70             step = None
  71             continue
  72         if i - prev in [-1, 1]:
  73             step = i - prev
  74             start = prev
  75             continue
  76         else:
  77             yield 's[%d]' % prev
  78     if step is None:
  79         yield 's[%d]' % i
  80     else:
  81         yield _genslice(start, i, step)
  82
  83 def _assert_compress(inp, exp):
  84     res = list(compress(inp))
  85     if res != exp:
  86         print('Got %r, expected %r' % (res, exp))
  87         assert res == exp
  88 _assert_compress([0,2,4,6], ['s[0]', 's[2]', 's[4]', 's[6]'])
  89 _assert_compress([0,1,2,4,6,7], ['s[:3]', 's[4]', 's[6:8]'])
  90 _assert_compress([8,0,1,2,4,7,6,9], ['s[8]', 's[:3]', 's[4]', 's[7:5:-1]', 's[9]'])
  91
  92 def gen(wrong, right, indent):
  93     code = ' + '.join(find_matching(wrong, right))
  94     return 'if len(s) == %d:\n%s    return %s\n' % (len(wrong), indent, code)
  95
  96 def genall(tests):
  97     indent = ' ' * 8
  98     return indent + (indent + 'el').join(gen(wrong, right, indent) for wrong,right in tests)
  99
 100 def main():
 101     print(genall(tests))
 102     print(u'    Age gate:')
 103     print(genall(tests_age_gate))
 104
 105 if __name__ == '__main__':
 106     main()