diff options
Diffstat (limited to 'youtube_dl/jsinterp.py')
| -rw-r--r-- | youtube_dl/jsinterp.py | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/youtube_dl/jsinterp.py b/youtube_dl/jsinterp.py index 24cdec28c..7bda59610 100644 --- a/youtube_dl/jsinterp.py +++ b/youtube_dl/jsinterp.py @@ -6,6 +6,7 @@ import re from .utils import ( ExtractorError, + remove_quotes, ) _OPERATORS = [ @@ -57,7 +58,6 @@ class JSInterpreter(object): def interpret_expression(self, expr, local_vars, allow_recursion): expr = expr.strip() - if expr == '': # Empty expression return None @@ -121,11 +121,19 @@ class JSInterpreter(object): pass m = re.match( - r'(?P<var>%s)\.(?P<member>[^(]+)(?:\(+(?P<args>[^()]*)\))?$' % _NAME_RE, + r'(?P<in>%s)\[(?P<idx>.+)\]$' % _NAME_RE, expr) + if m: + val = local_vars[m.group('in')] + idx = self.interpret_expression( + m.group('idx'), local_vars, allow_recursion - 1) + return val[idx] + + m = re.match( + r'(?P<var>%s)(?:\.(?P<member>[^(]+)|\[(?P<member2>[^]]+)\])\s*(?:\(+(?P<args>[^()]*)\))?$' % _NAME_RE, expr) if m: variable = m.group('var') - member = m.group('member') + member = remove_quotes(m.group('member') or m.group('member2')) arg_str = m.group('args') if variable in local_vars: @@ -173,14 +181,6 @@ class JSInterpreter(object): return obj[member](argvals) - m = re.match( - r'(?P<in>%s)\[(?P<idx>.+)\]$' % _NAME_RE, expr) - if m: - val = local_vars[m.group('in')] - idx = self.interpret_expression( - m.group('idx'), local_vars, allow_recursion - 1) - return val[idx] - for op, opfunc in _OPERATORS: m = re.match(r'(?P<x>.+?)%s(?P<y>.+)' % re.escape(op), expr) if not m: @@ -211,21 +211,25 @@ class JSInterpreter(object): raise ExtractorError('Unsupported JS expression %r' % expr) def extract_object(self, objname): + _FUNC_NAME_RE = r'''(?:[a-zA-Z$0-9]+|"[a-zA-Z$0-9]+"|'[a-zA-Z$0-9]+')''' obj = {} obj_m = re.search( - (r'(?<!this\.)%s\s*=\s*\{' % re.escape(objname)) + - r'\s*(?P<fields>([a-zA-Z$0-9]+\s*:\s*function\(.*?\)\s*\{.*?\}(?:,\s*)?)*)' + - r'\}\s*;', + r'''(?x) + (?<!this\.)%s\s*=\s*{\s* + (?P<fields>(%s\s*:\s*function\s*\(.*?\)\s*{.*?}(?:,\s*)?)*) + }\s*; + ''' % (re.escape(objname), _FUNC_NAME_RE), self.code) fields = obj_m.group('fields') # Currently, it only supports function definitions fields_m = re.finditer( - r'(?P<key>[a-zA-Z$0-9]+)\s*:\s*function' - r'\((?P<args>[a-z,]+)\){(?P<code>[^}]+)}', + r'''(?x) + (?P<key>%s)\s*:\s*function\s*\((?P<args>[a-z,]+)\){(?P<code>[^}]+)} + ''' % _FUNC_NAME_RE, fields) for f in fields_m: argnames = f.group('args').split(',') - obj[f.group('key')] = self.build_function(argnames, f.group('code')) + obj[remove_quotes(f.group('key'))] = self.build_function(argnames, f.group('code')) return obj |