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[swfinterp] Allow function patching

This commit is contained in:
Philipp Hagemeister 2014-11-17 01:27:15 +01:00
parent a0f59cdcb4
commit b7558d9881
1 changed files with 7 additions and 0 deletions
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7
youtube_dl/swfinterp.py
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@ -150,6 +150,7 @@ def _read_byte(reader):
class SWFInterpreter(object): class SWFInterpreter(object):
def __init__(self, file_contents): def __init__(self, file_contents):
self._patched_functions = {}
code_tag = next(tag code_tag = next(tag
for tag_code, tag in _extract_tags(file_contents) for tag_code, tag in _extract_tags(file_contents)
if tag_code == 82) if tag_code == 82)
@ -354,6 +355,9 @@ class SWFInterpreter(object):
assert p + code_reader.tell() == len(code_tag) assert p + code_reader.tell() == len(code_tag)
def patch_function(self, avm_class, func_name, f):
self._patched_functions[(avm_class, func_name)] = f
def extract_class(self, class_name): def extract_class(self, class_name):
try: try:
return self._classes_by_name[class_name] return self._classes_by_name[class_name]
@ -361,6 +365,9 @@ class SWFInterpreter(object):
raise ExtractorError('Class %r not found' % class_name) raise ExtractorError('Class %r not found' % class_name)
def extract_function(self, avm_class, func_name): def extract_function(self, avm_class, func_name):
p = self._patched_functions.get((avm_class, func_name))
if p:
return p
if func_name in avm_class.method_pyfunctions: if func_name in avm_class.method_pyfunctions:
return avm_class.method_pyfunctions[func_name] return avm_class.method_pyfunctions[func_name]
if func_name in self._classes_by_name: if func_name in self._classes_by_name: