diff options
Diffstat (limited to 'youtube_dl/jsinterp.py')
| -rw-r--r-- | youtube_dl/jsinterp.py | 92 |
1 files changed, 51 insertions, 41 deletions
diff --git a/youtube_dl/jsinterp.py b/youtube_dl/jsinterp.py index a8456ec1c..08726e478 100644 --- a/youtube_dl/jsinterp.py +++ b/youtube_dl/jsinterp.py @@ -5,7 +5,6 @@ import json import math import operator import re -from collections import Counter from .utils import ( error_to_compat_str, @@ -15,6 +14,7 @@ from .utils import ( unified_timestamp, ) from .compat import ( + compat_basestring, compat_collections_chain_map as ChainMap, compat_itertools_zip_longest as zip_longest, compat_str, @@ -76,6 +76,10 @@ def _js_comp_op(op): def wrapped(a, b): if JS_Undefined in (a, b): return False + if isinstance(a, compat_basestring): + b = compat_str(b or 0) + elif isinstance(b, compat_basestring): + a = compat_str(a or 0) return op(a or 0, b or 0) return wrapped @@ -195,7 +199,6 @@ class JSInterpreter(object): 'y': 4096, # Perform a "sticky" search that matches starting at the current position in the target string } - _EXC_NAME = '__youtube_dl_exception__' _OBJ_NAME = '__youtube_dl_jsinterp_obj' OP_CHARS = None @@ -242,9 +245,8 @@ class JSInterpreter(object): def _separate(cls, expr, delim=',', max_split=None, skip_delims=None): if not expr: return - # collections.Counter() is ~10% slower + # collections.Counter() is ~10% slower in both 2.7 and 3.9 counters = {k: 0 for k in _MATCHING_PARENS.values()} - # counters = Counter() start, splits, pos, delim_len = 0, 0, 0, len(delim) - 1 in_quote, escaping, skipping = None, False, 0 after_op, in_regex_char_group, skip_re = True, False, 0 @@ -291,7 +293,9 @@ class JSInterpreter(object): yield expr[start:] @classmethod - def _separate_at_paren(cls, expr, delim): + def _separate_at_paren(cls, expr, delim=None): + if delim is None: + delim = expr and _MATCHING_PARENS[expr[0]] separated = list(cls._separate(expr, delim, 1)) if len(separated) < 2: @@ -376,7 +380,7 @@ class JSInterpreter(object): if expr.startswith('new '): obj = expr[4:] if obj.startswith('Date('): - left, right = self._separate_at_paren(obj[4:], ')') + left, right = self._separate_at_paren(obj[4:]) expr = unified_timestamp( self.interpret_expression(left, local_vars, allow_recursion), False) if not expr: @@ -390,7 +394,7 @@ class JSInterpreter(object): return None, should_return if expr.startswith('{'): - inner, outer = self._separate_at_paren(expr, '}') + inner, outer = self._separate_at_paren(expr) # 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): @@ -406,7 +410,7 @@ class JSInterpreter(object): expr = self._dump(inner, local_vars) + outer if expr.startswith('('): - inner, outer = self._separate_at_paren(expr, ')') + inner, outer = self._separate_at_paren(expr) inner, should_abort = self.interpret_statement(inner, local_vars, allow_recursion) if not outer or should_abort: return inner, should_abort or should_return @@ -414,57 +418,63 @@ class JSInterpreter(object): expr = self._dump(inner, local_vars) + outer if expr.startswith('['): - inner, outer = self._separate_at_paren(expr, ']') + inner, outer = self._separate_at_paren(expr) name = self._named_object(local_vars, [ self.interpret_expression(item, local_vars, allow_recursion) for item in self._separate(inner)]) expr = name + outer m = re.match(r'''(?x) - (?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<try>try)\s*\{| + (?P<switch>switch)\s*\(| + (?P<for>for)\s*\( + ''', expr) md = m.groupdict() if m else {} if md.get('try'): - if expr[m.end()] == '{': - try_expr, expr = self._separate_at_paren(expr[m.end():], '}') - else: - try_expr, expr = expr[m.end() - 1:], '' + try_expr, expr = self._separate_at_paren(expr[m.end() - 1:]) + err = None try: ret, should_abort = self.interpret_statement(try_expr, local_vars, allow_recursion) if should_abort: return ret, True - except JS_Throw as e: - local_vars[self._EXC_NAME] = e.error except Exception as e: # XXX: This works for now, but makes debugging future issues very hard - local_vars[self._EXC_NAME] = e - ret, should_abort = self.interpret_statement(expr, local_vars, allow_recursion) - return ret, should_abort or should_return - - elif md.get('catch'): - - catch_expr, expr = self._separate_at_paren(expr[m.end():], '}') - if self._EXC_NAME in local_vars: - catch_vars = local_vars.new_child({m.group('err'): local_vars.pop(self._EXC_NAME)}) - ret, should_abort = self.interpret_statement(catch_expr, catch_vars, allow_recursion) + err = e + + pending = (None, False) + m = re.match(r'catch\s*(?P<err>\(\s*{_NAME_RE}\s*\))?\{{'.format(**globals()), expr) + if m: + sub_expr, expr = self._separate_at_paren(expr[m.end() - 1:]) + if err: + catch_vars = {} + if m.group('err'): + catch_vars[m.group('err')] = err.error if isinstance(err, JS_Throw) else err + catch_vars = local_vars.new_child(m=catch_vars) + err = None + pending = self.interpret_statement(sub_expr, catch_vars, allow_recursion) + + m = re.match(r'finally\s*\{', expr) + if m: + sub_expr, expr = self._separate_at_paren(expr[m.end() - 1:]) + ret, should_abort = self.interpret_statement(sub_expr, local_vars, allow_recursion) if should_abort: return ret, True - ret, should_abort = self.interpret_statement(expr, local_vars, allow_recursion) + ret, should_abort = pending + if should_abort: + return ret, True - return ret, should_abort or should_return + if err: + raise err elif md.get('for'): - constructor, remaining = self._separate_at_paren(expr[m.end() - 1:], ')') + constructor, remaining = self._separate_at_paren(expr[m.end() - 1:]) if remaining.startswith('{'): - body, expr = self._separate_at_paren(remaining, '}') + body, expr = self._separate_at_paren(remaining) else: switch_m = re.match(r'switch\s*\(', remaining) # FIXME if switch_m: - switch_val, remaining = self._separate_at_paren(remaining[switch_m.end() - 1:], ')') + switch_val, remaining = self._separate_at_paren(remaining[switch_m.end() - 1:]) body, expr = self._separate_at_paren(remaining, '}') body = 'switch(%s){%s}' % (switch_val, body) else: @@ -483,11 +493,9 @@ class JSInterpreter(object): except JS_Continue: pass self.interpret_expression(increment, local_vars, allow_recursion) - ret, should_abort = self.interpret_statement(expr, local_vars, allow_recursion) - return ret, should_abort or should_return elif md.get('switch'): - switch_val, remaining = self._separate_at_paren(expr[m.end() - 1:], ')') + switch_val, remaining = self._separate_at_paren(expr[m.end() - 1:]) switch_val = self.interpret_expression(switch_val, local_vars, allow_recursion) body, expr = self._separate_at_paren(remaining, '}') items = body.replace('default:', 'case default:').split('case ')[1:] @@ -510,6 +518,8 @@ class JSInterpreter(object): break if matched: break + + if md: ret, should_abort = self.interpret_statement(expr, local_vars, allow_recursion) return ret, should_abort or should_return @@ -618,7 +628,7 @@ class JSInterpreter(object): member = self.interpret_expression(m.group('member2'), local_vars, allow_recursion) arg_str = expr[m.end():] if arg_str.startswith('('): - arg_str, remaining = self._separate_at_paren(arg_str, ')') + arg_str, remaining = self._separate_at_paren(arg_str) else: arg_str, remaining = None, arg_str @@ -795,7 +805,7 @@ class JSInterpreter(object): \((?P<args>[^)]*)\)\s* (?P<code>{.+})''' % {'name': re.escape(funcname)}, self.code) - code, _ = self._separate_at_paren(func_m.group('code'), '}') # refine the match + code, _ = self._separate_at_paren(func_m.group('code')) # refine the match if func_m is None: raise self.Exception('Could not find JS function "{funcname}"'.format(**locals())) return self.build_arglist(func_m.group('args')), code @@ -810,7 +820,7 @@ class JSInterpreter(object): if mobj is None: break start, body_start = mobj.span() - body, remaining = self._separate_at_paren(code[body_start - 1:], '}') + body, remaining = self._separate_at_paren(code[body_start - 1:]) name = self._named_object( local_vars, self.extract_function_from_code( |