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#!/usr/bin/env python
# Generate youtube signature algorithm from test cases
import sys
tests = [ # 92 - vflQw-fB4 2013/07/17 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`~\"", "mrtyuioplkjhgfdsazxcvbnq1234567890QWERTY}IOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]\"|:;"), # 90 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`", "mrtyuioplkjhgfdsazxcvbne1234567890QWER[YUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={`]}|"), # 88 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<", "J:|}][{=+-_)(*&;%$#@>MNBVCXZASDFGH^KLPOIUYTREWQ0987654321mnbvcxzasdfghrklpoiuytej"), # 87 - vflART1Nf 2013/07/24 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>.<", "tyuioplkjhgfdsazxcv<nm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>"), # 86 - vflm_D8eE 2013/07/31 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<", ">.1}|[{=+-_)(*&^%$#@!MNBVCXZASDFGHJK<POIUYTREW509876L432/mnbvcxzasdfghjklpoiuytre"), # 85 - vflSAFCP9 2013/07/19 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?/>.<", "ertyuiqplkjhgfdsazx$vbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#<%^&*()_-+={[};?/c"), # 84 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?>.<", "<.>?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWe098765432rmnbvcxzasdfghjklpoiuyt1"), # 83 - vflTWC9KW 2013/08/01 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/>.<", "qwertyuioplkjhg>dsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/f"), # 82 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.<", "Q>/?;}[{=+-(*<^%$#@!MNBVCXZASDFGHKLPOIUY8REWT0q&7654321mnbvcxzasdfghjklpoiuytrew9"), # 81 - vflLC8JvQ 2013/07/25 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.", "C>/?;}[{=+-(*&^%$#@!MNBVYXZASDFGHKLPOIU.TREWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"), # 79 - vflLC8JvQ 2013/07/25 (sporadic) ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/", "Z?;}[{=+-(*&^%$#@!MNBVCXRASDFGHKLPOIUYT/EWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"),]
tests_age_gate = [ # 86 - vflqinMWD ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<", "ertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!/#$%^&*()_-+={[|};?@"),]
def find_matching(wrong, right): idxs = [wrong.index(c) for c in right] return compress(idxs) return ('s[%d]' % i for i in idxs)
def compress(idxs): def _genslice(start, end, step): starts = '' if start == 0 else str(start) ends = ':%d' % (end+step) steps = '' if step == 1 else (':%d' % step) return 's[%s%s%s]' % (starts, ends, steps)
step = None for i, prev in zip(idxs[1:], idxs[:-1]): if step is not None: if i - prev == step: continue yield _genslice(start, prev, step) step = None continue if i - prev in [-1, 1]: step = i - prev start = prev continue else: yield 's[%d]' % prev if step is None: yield 's[%d]' % i else: yield _genslice(start, i, step)
def _assert_compress(inp, exp): res = list(compress(inp)) if res != exp: print('Got %r, expected %r' % (res, exp)) assert res == exp_assert_compress([0,2,4,6], ['s[0]', 's[2]', 's[4]', 's[6]'])_assert_compress([0,1,2,4,6,7], ['s[:3]', 's[4]', 's[6:8]'])_assert_compress([8,0,1,2,4,7,6,9], ['s[8]', 's[:3]', 's[4]', 's[7:5:-1]', 's[9]'])
def gen(wrong, right, indent): code = ' + '.join(find_matching(wrong, right)) return 'if len(s) == %d:\n%s return %s\n' % (len(wrong), indent, code)
def genall(tests): indent = ' ' * 8 return indent + (indent + 'el').join(gen(wrong, right, indent) for wrong,right in tests)
def main(): print(genall(tests)) print(u' Age gate:') print(genall(tests_age_gate))
if __name__ == '__main__': main()
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