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[jsinterp] Handle negative numbers better

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Closes #6131
This commit is contained in:
pukkandan 2023-04-27 07:42:17 +05:30
parent 170605840e
commit 7cf51f2191
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GPG key ID: 7EEE9E1E817D0A39
3 changed files with 25 additions and 3 deletions
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16
test/test_jsinterp.py
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@ -445,6 +445,22 @@ class TestJSInterpreter(unittest.TestCase):
jsi = JSInterpreter('function x(){return 1236566549 << 5}')
self.assertEqual(jsi.call_function('x'), 915423904)
def test_negative(self):
jsi = JSInterpreter("function f(){return 2 * -2.0;}")
self.assertEqual(jsi.call_function('f'), -4)
jsi = JSInterpreter('function f(){return 2 - - -2;}')
self.assertEqual(jsi.call_function('f'), 0)
jsi = JSInterpreter('function f(){return 2 - - - -2;}')
self.assertEqual(jsi.call_function('f'), 4)
jsi = JSInterpreter('function f(){return 2 - + + - -2;}')
self.assertEqual(jsi.call_function('f'), 0)
jsi = JSInterpreter('function f(){return 2 + - + - -2;}')
self.assertEqual(jsi.call_function('f'), 0)
if __name__ == '__main__':
unittest.main()

4
test/test_youtube_signature.py
View file

@ -142,6 +142,10 @@ _NSIG_TESTS = [
'https://www.youtube.com/s/player/dac945fd/player_ias.vflset/en_US/base.js',
'o8BkRxXhuYsBCWi6RplPdP', '3Lx32v_hmzTm6A',
),
(
'https://www.youtube.com/s/player/6f20102c/player_ias.vflset/en_US/base.js',
'lE8DhoDmKqnmJJ', 'pJTTX6XyJP2BYw',
),
]

8
yt_dlp/jsinterp.py
View file

@ -243,7 +243,7 @@ class JSInterpreter:
return
counters = {k: 0 for k in _MATCHING_PARENS.values()}
start, splits, pos, delim_len = 0, 0, 0, len(delim) - 1
in_quote, escaping, after_op, in_regex_char_group = None, False, True, False
in_quote, escaping, after_op, in_regex_char_group, in_unary_op = None, False, True, False, False
for idx, char in enumerate(expr):
if not in_quote and char in _MATCHING_PARENS:
counters[_MATCHING_PARENS[char]] += 1
@ -258,9 +258,11 @@ class JSInterpreter:
elif in_quote == '/' and char in '[]':
in_regex_char_group = char == '['
escaping = not escaping and in_quote and char == '\\'
after_op = not in_quote and char in OP_CHARS or (char.isspace() and after_op)
in_unary_op = (not in_quote and not in_regex_char_group
and after_op not in (True, False) and char in '-+')
after_op = char if (not in_quote and char in OP_CHARS) else (char.isspace() and after_op)
if char != delim[pos] or any(counters.values()) or in_quote:
if char != delim[pos] or any(counters.values()) or in_quote or in_unary_op:
pos = 0
continue
elif pos != delim_len: