mirror of
https://github.com/ytdl-org/youtube-dl.git
synced 2024-11-22 02:01:50 +00:00
[jsinterp] Clean up and pull yt-dlp style
* add compat_re_Pattern * improve compat_collections_chain_map * use class JS_Undefined * remove unused code
This commit is contained in:
dirkf
parent
538ec65ba7
commit
46b8ae2f52
4 changed files with 77 additions and 90 deletions
|
|
@ -11,8 +11,9 @@ sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
|
|||
import math
|
||||
import re
|
||||
|
||||
from youtube_dl.jsinterp import JSInterpreter
|
||||
undefined = JSInterpreter.undefined
|
||||
from youtube_dl.compat import compat_re_Pattern
|
||||
|
||||
from youtube_dl.jsinterp import JS_Undefined, JSInterpreter
|
||||
|
||||
|
||||
class TestJSInterpreter(unittest.TestCase):
|
||||
|
|
@ -261,12 +262,12 @@ class TestJSInterpreter(unittest.TestCase):
|
|||
jsi = JSInterpreter('''
|
||||
function x() { return undefined; }
|
||||
''')
|
||||
self.assertIs(jsi.call_function('x'), undefined)
|
||||
self.assertIs(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let v; return v; }
|
||||
''')
|
||||
self.assertIs(jsi.call_function('x'), undefined)
|
||||
self.assertIs(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { return [undefined === undefined, undefined == undefined, undefined < undefined, undefined > undefined]; }
|
||||
|
|
@ -307,7 +308,7 @@ class TestJSInterpreter(unittest.TestCase):
|
|||
jsi = JSInterpreter('''
|
||||
function x() { let v; return [v>42, v<=42, v&&42, 42&&v]; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, undefined, undefined])
|
||||
self.assertEqual(jsi.call_function('x'), [False, False, JS_Undefined, JS_Undefined])
|
||||
|
||||
jsi = JSInterpreter('function x(){return undefined ?? 42; }')
|
||||
self.assertEqual(jsi.call_function('x'), 42)
|
||||
|
|
@ -326,12 +327,12 @@ class TestJSInterpreter(unittest.TestCase):
|
|||
jsi = JSInterpreter('''
|
||||
function x() { let a; return a?.qq; }
|
||||
''')
|
||||
self.assertIs(jsi.call_function('x'), undefined)
|
||||
self.assertIs(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a = {m1: 42, m2: 0 }; return a?.qq; }
|
||||
''')
|
||||
self.assertIs(jsi.call_function('x'), undefined)
|
||||
self.assertIs(jsi.call_function('x'), JS_Undefined)
|
||||
|
||||
def test_regex(self):
|
||||
jsi = JSInterpreter('''
|
||||
|
|
@ -342,13 +343,12 @@ class TestJSInterpreter(unittest.TestCase):
|
|||
jsi = JSInterpreter('''
|
||||
function x() { let a=/,,[/,913,/](,)}/; return a; }
|
||||
''')
|
||||
# Pythons disagree on the type of a pattern
|
||||
self.assertTrue(isinstance(jsi.call_function('x'), type(re.compile(''))))
|
||||
self.assertIsInstance(jsi.call_function('x'), compat_re_Pattern)
|
||||
|
||||
jsi = JSInterpreter('''
|
||||
function x() { let a=/,,[/,913,/](,)}/i; return a; }
|
||||
''')
|
||||
self.assertEqual(jsi.call_function('x').flags & re.I, re.I)
|
||||
self.assertEqual(jsi.call_function('x').flags & ~re.U, re.I)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
|
|
|
|||
|
|
@ -12,10 +12,11 @@ import io
|
|||
import re
|
||||
import string
|
||||
|
||||
from youtube_dl.compat import compat_str, compat_urlretrieve
|
||||
|
||||
from test.helper import FakeYDL
|
||||
from youtube_dl.extractor import YoutubeIE
|
||||
from youtube_dl.jsinterp import JSInterpreter
|
||||
from youtube_dl.compat import compat_str, compat_urlretrieve
|
||||
|
||||
_SIG_TESTS = [
|
||||
(
|
||||
|
|
|
|||
|
|
@ -3023,18 +3023,34 @@ except ImportError:
|
|||
self.maps[0].__setitem__(k, v)
|
||||
return
|
||||
|
||||
def __delitem__(self, k):
|
||||
def __contains__(self, k):
|
||||
return any((k in m) for m in self.maps)
|
||||
|
||||
def __delitem(self, k):
|
||||
if k in self.maps[0]:
|
||||
del self.maps[0][k]
|
||||
return
|
||||
raise KeyError(k)
|
||||
|
||||
def __delitem__(self, k):
|
||||
self.__delitem(k)
|
||||
|
||||
def __iter__(self):
|
||||
return itertools.chain(*reversed(self.maps))
|
||||
|
||||
def __len__(self):
|
||||
return len(iter(self))
|
||||
|
||||
# to match Py3, don't del directly
|
||||
def pop(self, k, *args):
|
||||
if self.__contains__(k):
|
||||
off = self.__getitem__(k)
|
||||
self.__delitem(k)
|
||||
return off
|
||||
elif len(args) > 0:
|
||||
return args[0]
|
||||
raise KeyError(k)
|
||||
|
||||
def new_child(self, m=None, **kwargs):
|
||||
m = m or {}
|
||||
m.update(kwargs)
|
||||
|
|
@ -3044,6 +3060,8 @@ except ImportError:
|
|||
def parents(self):
|
||||
return compat_collections_chain_map(*(self.maps[1:]))
|
||||
|
||||
# Pythons disagree on the type of a pattern (RegexObject, _sre.SRE_Pattern, Pattern, ...?)
|
||||
compat_re_Pattern = type(re.compile(''))
|
||||
|
||||
if sys.version_info < (3, 3):
|
||||
def compat_b64decode(s, *args, **kwargs):
|
||||
|
|
@ -3110,6 +3128,7 @@ __all__ = [
|
|||
'compat_os_name',
|
||||
'compat_parse_qs',
|
||||
'compat_print',
|
||||
'compat_re_Pattern',
|
||||
'compat_realpath',
|
||||
'compat_setenv',
|
||||
'compat_shlex_quote',
|
||||
|
|
|
|||
|
|
@ -19,16 +19,12 @@ from .compat import (
|
|||
compat_str,
|
||||
)
|
||||
|
||||
_NAME_RE = r'[a-zA-Z_$][\w$]*'
|
||||
|
||||
_UNDEFINED = object()
|
||||
|
||||
|
||||
def _js_bit_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
def zeroise(x):
|
||||
return 0 if x in (None, _UNDEFINED) else x
|
||||
return 0 if x in (None, JS_Undefined) else x
|
||||
return op(zeroise(a), zeroise(b))
|
||||
|
||||
return wrapped
|
||||
|
|
@ -37,7 +33,7 @@ def _js_bit_op(op):
|
|||
def _js_arith_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if _UNDEFINED in (a, b):
|
||||
if JS_Undefined in (a, b):
|
||||
return float('nan')
|
||||
return op(a or 0, b or 0)
|
||||
|
||||
|
|
@ -45,22 +41,21 @@ def _js_arith_op(op):
|
|||
|
||||
|
||||
def _js_div(a, b):
|
||||
if _UNDEFINED in (a, b) or not (a and b):
|
||||
if JS_Undefined in (a, b) or not (a and b):
|
||||
return float('nan')
|
||||
return float('inf') if not b else operator.truediv(a or 0, b)
|
||||
|
||||
|
||||
def _js_mod(a, b):
|
||||
if _UNDEFINED in (a, b) or not b:
|
||||
if JS_Undefined in (a, b) or not b:
|
||||
return float('nan')
|
||||
return (a or 0) % b
|
||||
|
||||
|
||||
def _js_exp(a, b):
|
||||
if not b:
|
||||
# even 0 ** 0 !!
|
||||
return 1
|
||||
if _UNDEFINED in (a, b):
|
||||
return 1 # even 0 ** 0 !!
|
||||
elif JS_Undefined in (a, b):
|
||||
return float('nan')
|
||||
return (a or 0) ** b
|
||||
|
||||
|
|
@ -68,7 +63,7 @@ def _js_exp(a, b):
|
|||
def _js_eq_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if set((a, b)) <= set((None, _UNDEFINED)):
|
||||
if set((a, b)) <= set((None, JS_Undefined)):
|
||||
return op(a, a)
|
||||
return op(a, b)
|
||||
|
||||
|
|
@ -78,21 +73,28 @@ def _js_eq_op(op):
|
|||
def _js_comp_op(op):
|
||||
|
||||
def wrapped(a, b):
|
||||
if _UNDEFINED in (a, b):
|
||||
if JS_Undefined in (a, b):
|
||||
return False
|
||||
return op(a or 0, b or 0)
|
||||
|
||||
return wrapped
|
||||
|
||||
|
||||
def _js_ternary(cndn, if_true=True, if_false=False):
|
||||
"""Simulate JS's ternary operator (cndn?if_true:if_false)"""
|
||||
if cndn in (False, None, 0, '', JS_Undefined):
|
||||
return if_false
|
||||
try:
|
||||
if math.isnan(cndn): # NB: NaN cannot be checked by membership
|
||||
return if_false
|
||||
except TypeError:
|
||||
pass
|
||||
return if_true
|
||||
|
||||
|
||||
# (op, definition) in order of binding priority, tightest first
|
||||
# avoid dict to maintain order
|
||||
# definition None => Defined in JSInterpreter._operator
|
||||
_DOT_OPERATORS = (
|
||||
('.', None),
|
||||
# TODO: ('?.', None),
|
||||
)
|
||||
|
||||
_OPERATORS = (
|
||||
('>>', _js_bit_op(operator.rshift)),
|
||||
('<<', _js_bit_op(operator.lshift)),
|
||||
|
|
@ -130,20 +132,13 @@ _SC_OPERATORS = (
|
|||
|
||||
_OPERATOR_RE = '|'.join(map(lambda x: re.escape(x[0]), _OPERATORS + _LOG_OPERATORS))
|
||||
|
||||
_NAME_RE = r'[a-zA-Z_$][\w$]*'
|
||||
_MATCHING_PARENS = dict(zip(*zip('()', '{}', '[]')))
|
||||
_QUOTES = '\'"/'
|
||||
|
||||
|
||||
def _ternary(cndn, if_true=True, if_false=False):
|
||||
"""Simulate JS's ternary operator (cndn?if_true:if_false)"""
|
||||
if cndn in (False, None, 0, '', _UNDEFINED):
|
||||
return if_false
|
||||
try:
|
||||
if math.isnan(cndn): # NB: NaN cannot be checked by membership
|
||||
return if_false
|
||||
except TypeError:
|
||||
pass
|
||||
return if_true
|
||||
class JS_Undefined(object):
|
||||
pass
|
||||
|
||||
|
||||
class JS_Break(ExtractorError):
|
||||
|
|
@ -167,7 +162,7 @@ class LocalNameSpace(ChainMap):
|
|||
try:
|
||||
return super(LocalNameSpace, self).__getitem__(key)
|
||||
except KeyError:
|
||||
return _UNDEFINED
|
||||
return JS_Undefined
|
||||
|
||||
def __setitem__(self, key, value):
|
||||
for scope in self.maps:
|
||||
|
|
@ -179,24 +174,6 @@ class LocalNameSpace(ChainMap):
|
|||
def __delitem__(self, key):
|
||||
raise NotImplementedError('Deleting is not supported')
|
||||
|
||||
# except
|
||||
def pop(self, key, *args):
|
||||
try:
|
||||
off = self.__getitem__(key)
|
||||
super(LocalNameSpace, self).__delitem__(key)
|
||||
return off
|
||||
except KeyError:
|
||||
if len(args) > 0:
|
||||
return args[0]
|
||||
raise
|
||||
|
||||
def __contains__(self, key):
|
||||
try:
|
||||
super(LocalNameSpace, self).__getitem__(key)
|
||||
return True
|
||||
except KeyError:
|
||||
return False
|
||||
|
||||
def __repr__(self):
|
||||
return 'LocalNameSpace%s' % (self.maps, )
|
||||
|
||||
|
|
@ -204,9 +181,7 @@ class LocalNameSpace(ChainMap):
|
|||
class JSInterpreter(object):
|
||||
__named_object_counter = 0
|
||||
|
||||
undefined = _UNDEFINED
|
||||
|
||||
RE_FLAGS = {
|
||||
_RE_FLAGS = {
|
||||
# special knowledge: Python's re flags are bitmask values, current max 128
|
||||
# invent new bitmask values well above that for literal parsing
|
||||
# TODO: new pattern class to execute matches with these flags
|
||||
|
|
@ -257,10 +232,10 @@ class JSInterpreter(object):
|
|||
if not expr:
|
||||
return flags, expr
|
||||
for idx, ch in enumerate(expr):
|
||||
if ch not in cls.RE_FLAGS:
|
||||
if ch not in cls._RE_FLAGS:
|
||||
break
|
||||
flags |= cls.RE_FLAGS[ch]
|
||||
return flags, expr[idx:] if idx > 0 else expr
|
||||
flags |= cls._RE_FLAGS[ch]
|
||||
return flags, expr[idx + 1:]
|
||||
|
||||
@classmethod
|
||||
def _separate(cls, expr, delim=',', max_split=None, skip_delims=None):
|
||||
|
|
@ -283,14 +258,6 @@ class JSInterpreter(object):
|
|||
if not escaping and char in _QUOTES and in_quote in (char, None):
|
||||
if in_quote or after_op or char != '/':
|
||||
in_quote = None if in_quote and not in_regex_char_group else char
|
||||
if in_quote is None and char == '/' and delim != '/':
|
||||
# regexp flags
|
||||
n_idx = idx + 1
|
||||
while n_idx < len(expr) and expr[n_idx] in cls.RE_FLAGS:
|
||||
n_idx += 1
|
||||
skip_re = n_idx - idx - 1
|
||||
if skip_re > 0:
|
||||
continue
|
||||
elif in_quote == '/' and char in '[]':
|
||||
in_regex_char_group = char == '['
|
||||
escaping = not escaping and in_quote and char == '\\'
|
||||
|
|
@ -336,13 +303,13 @@ class JSInterpreter(object):
|
|||
|
||||
def _operator(self, op, left_val, right_expr, expr, local_vars, allow_recursion):
|
||||
if op in ('||', '&&'):
|
||||
if (op == '&&') ^ _ternary(left_val):
|
||||
if (op == '&&') ^ _js_ternary(left_val):
|
||||
return left_val # short circuiting
|
||||
elif op == '??':
|
||||
if left_val not in (None, self.undefined):
|
||||
if left_val not in (None, JS_Undefined):
|
||||
return left_val
|
||||
elif op == '?':
|
||||
right_expr = _ternary(left_val, *self._separate(right_expr, ':', 1))
|
||||
right_expr = _js_ternary(left_val, *self._separate(right_expr, ':', 1))
|
||||
|
||||
right_val = self.interpret_expression(right_expr, local_vars, allow_recursion)
|
||||
opfunc = op and next((v for k, v in self._all_operators() if k == op), None)
|
||||
|
|
@ -361,7 +328,7 @@ class JSInterpreter(object):
|
|||
return obj[int(idx)] if isinstance(obj, list) else obj[idx]
|
||||
except Exception as e:
|
||||
if allow_undefined:
|
||||
return self.undefined
|
||||
return JS_Undefined
|
||||
raise self.Exception('Cannot get index {idx}'.format(**locals()), expr=repr(obj), cause=e)
|
||||
|
||||
def _dump(self, obj, namespace):
|
||||
|
|
@ -395,9 +362,8 @@ class JSInterpreter(object):
|
|||
if expr[0] in _QUOTES:
|
||||
inner, outer = self._separate(expr, expr[0], 1)
|
||||
if expr[0] == '/':
|
||||
flags, _ = self._regex_flags(outer)
|
||||
inner, outer = inner.replace('"', r'\"'), ''
|
||||
inner = re.compile(js_to_json(inner + expr[0]), flags=flags) # , strict=True))
|
||||
flags, outer = self._regex_flags(outer)
|
||||
inner = re.compile(inner[1:], flags=flags) # , strict=True))
|
||||
else:
|
||||
inner = json.loads(js_to_json(inner + expr[0])) # , strict=True))
|
||||
if not outer:
|
||||
|
|
@ -422,7 +388,7 @@ class JSInterpreter(object):
|
|||
|
||||
if expr.startswith('{'):
|
||||
inner, outer = self._separate_at_paren(expr, '}')
|
||||
# try for object expression
|
||||
# try for object expression (Map)
|
||||
sub_expressions = [list(self._separate(sub_expr.strip(), ':', 1)) for sub_expr in self._separate(inner)]
|
||||
if all(len(sub_expr) == 2 for sub_expr in sub_expressions):
|
||||
return dict(
|
||||
|
|
@ -455,7 +421,8 @@ class JSInterpreter(object):
|
|||
(?P<try>try|finally)\s*|
|
||||
(?P<catch>catch\s*(?P<err>\(\s*{_NAME_RE}\s*\)))|
|
||||
(?P<switch>switch)\s*\(|
|
||||
(?P<for>for)\s*\(|'''.format(**globals()), expr)
|
||||
(?P<for>for)\s*\(|
|
||||
'''.format(**globals()), expr)
|
||||
md = m.groupdict() if m else {}
|
||||
if md.get('try'):
|
||||
if expr[m.end()] == '{':
|
||||
|
|
@ -500,7 +467,7 @@ class JSInterpreter(object):
|
|||
start, cndn, increment = self._separate(constructor, ';')
|
||||
self.interpret_expression(start, local_vars, allow_recursion)
|
||||
while True:
|
||||
if not _ternary(self.interpret_expression(cndn, local_vars, allow_recursion)):
|
||||
if not _js_ternary(self.interpret_expression(cndn, local_vars, allow_recursion)):
|
||||
break
|
||||
try:
|
||||
ret, should_abort = self.interpret_statement(body, local_vars, allow_recursion)
|
||||
|
|
@ -587,7 +554,7 @@ class JSInterpreter(object):
|
|||
local_vars[m.group('out')] = self._operator(
|
||||
m.group('op'), left_val, m.group('expr'), expr, local_vars, allow_recursion)
|
||||
return local_vars[m.group('out')], should_return
|
||||
elif left_val in (None, self.undefined):
|
||||
elif left_val in (None, JS_Undefined):
|
||||
raise self.Exception('Cannot index undefined variable ' + m.group('out'), expr=expr)
|
||||
|
||||
idx = self.interpret_expression(m.group('index'), local_vars, allow_recursion)
|
||||
|
|
@ -607,7 +574,7 @@ class JSInterpreter(object):
|
|||
raise JS_Continue()
|
||||
|
||||
elif expr == 'undefined':
|
||||
return self.undefined, should_return
|
||||
return JS_Undefined, should_return
|
||||
|
||||
elif md.get('return'):
|
||||
return local_vars[m.group('name')], should_return
|
||||
|
|
@ -663,9 +630,9 @@ class JSInterpreter(object):
|
|||
'Math': float,
|
||||
}
|
||||
obj = local_vars.get(variable)
|
||||
if obj in (self.undefined, None):
|
||||
obj = types.get(variable, self.undefined)
|
||||
if obj is self.undefined:
|
||||
if obj in (JS_Undefined, None):
|
||||
obj = types.get(variable, JS_Undefined)
|
||||
if obj is JS_Undefined:
|
||||
try:
|
||||
if variable not in self._objects:
|
||||
self._objects[variable] = self.extract_object(variable)
|
||||
|
|
@ -674,8 +641,8 @@ class JSInterpreter(object):
|
|||
if not nullish:
|
||||
raise
|
||||
|
||||
if nullish and obj is self.undefined:
|
||||
return self.undefined
|
||||
if nullish and obj is JS_Undefined:
|
||||
return JS_Undefined
|
||||
|
||||
# Member access
|
||||
if arg_str is None:
|
||||
|
|
|
|||
Loading…
Reference in a new issue