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[jsinterp] Disable comment support 

We need a proper lexer to be able to understand YouTube's code, which contains /* inside of strings.
For now it's sufficient to just disable comment support altogether.

Fixes #4976, fixes #4979, fixes #4980, fixes #4981, fixes #4982.
Closes #4977.
This commit is contained in:
Philipp Hagemeister 2015-02-18 10:47:40 +01:00
parent 785521bf4f
commit 3eff81fbf7
3 changed files with 18 additions and 4 deletions
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11
test/test_jsinterp.py
View File

@ -70,6 +70,8 @@ class TestJSInterpreter(unittest.TestCase):
self.assertEqual(jsi.call_function('f'), -11) self.assertEqual(jsi.call_function('f'), -11)
def test_comments(self): def test_comments(self):
'Skipping: Not yet fully implemented'
return
jsi = JSInterpreter(''' jsi = JSInterpreter('''
function x() { function x() {
var x = /* 1 + */ 2; var x = /* 1 + */ 2;
@ -80,6 +82,15 @@ class TestJSInterpreter(unittest.TestCase):
''') ''')
self.assertEqual(jsi.call_function('x'), 52) self.assertEqual(jsi.call_function('x'), 52)
jsi = JSInterpreter('''
function f() {
var x = "/*";
var y = 1 /* comment */ + 2;
return y;
}
''')
self.assertEqual(jsi.call_function('f'), 3)
def test_precedence(self): def test_precedence(self):
jsi = JSInterpreter(''' jsi = JSInterpreter('''
function x() { function x() {

6
test/test_youtube_signature.py
View File

@ -64,6 +64,12 @@ _TESTS = [
'js', 'js',
'4646B5181C6C3020DF1D9C7FCFEA.AD80ABF70C39BD369CCCAE780AFBB98FA6B6CB42766249D9488C288', '4646B5181C6C3020DF1D9C7FCFEA.AD80ABF70C39BD369CCCAE780AFBB98FA6B6CB42766249D9488C288',
'82C8849D94266724DC6B6AF89BBFA087EACCD963.B93C07FBA084ACAEFCF7C9D1FD0203C6C1815B6B' '82C8849D94266724DC6B6AF89BBFA087EACCD963.B93C07FBA084ACAEFCF7C9D1FD0203C6C1815B6B'
),
(
'https://s.ytimg.com/yts/jsbin/html5player-en_US-vflKjOTVq/html5player.js',
'js',
'312AA52209E3623129A412D56A40F11CB0AF14AE.3EE09501CB14E3BCDC3B2AE808BF3F1D14E7FBF12',
'112AA5220913623229A412D56A40F11CB0AF14AE.3EE0950FCB14EEBCDC3B2AE808BF331D14E7FBF3',
) )
] ]

5
youtube_dl/jsinterp.py
View File

@ -30,13 +30,10 @@ class JSInterpreter(object):
def __init__(self, code, objects=None): def __init__(self, code, objects=None):
if objects is None: if objects is None:
objects = {} objects = {}
self.code = self._remove_comments(code) self.code = code
self._functions = {} self._functions = {}
self._objects = objects self._objects = objects
def _remove_comments(self, code):
return re.sub(r'(?s)/\*.*?\*/', '', code)
def interpret_statement(self, stmt, local_vars, allow_recursion=100): def interpret_statement(self, stmt, local_vars, allow_recursion=100):
if allow_recursion < 0: if allow_recursion < 0:
raise ExtractorError('Recursion limit reached') raise ExtractorError('Recursion limit reached')