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Code Issues Releases Wiki Activity

[swfinterp] Add support for more complicated constants

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This commit is contained in:
Philipp Hagemeister 2014-11-17 07:31:22 +01:00
parent 28e614de5c
commit 1921b24551
1 changed files with 22 additions and 4 deletions
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26
youtube_dl/swfinterp.py
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@ -354,7 +354,7 @@ class SWFInterpreter(object):
self._classes_by_name = dict((c.name, c) for c in classes)
for avm_class in classes:
u30() # cinit
avm_class.cinit_idx = u30()
trait_count = u30()
for _c2 in range(trait_count):
trait_methods, trait_constants = parse_traits_info()
@ -373,6 +373,7 @@ class SWFInterpreter(object):
# Method bodies
method_body_count = u30()
Method = collections.namedtuple('Method', ['code', 'local_count'])
self._all_methods = []
for _c in range(method_body_count):
method_idx = u30()
u30() # max_stack
@ -381,9 +382,10 @@ class SWFInterpreter(object):
u30() # max_scope_depth
code_length = u30()
code = read_bytes(code_length)
m = Method(code, local_count)
self._all_methods.append(m)
for avm_class in classes:
if method_idx in avm_class.method_idxs:
m = Method(code, local_count)
avm_class.methods[avm_class.method_idxs[method_idx]] = m
exception_count = u30()
for _c2 in range(exception_count):
@ -401,12 +403,20 @@ class SWFInterpreter(object):
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, call_cinit=True):
try:
return self._classes_by_name[class_name]
res = self._classes_by_name[class_name]
except KeyError:
raise ExtractorError('Class %r not found' % class_name)
if call_cinit and hasattr(res, 'cinit_idx'):
res.register_methods({'$cinit': res.cinit_idx})
res.methods['$cinit'] = self._all_methods[res.cinit_idx]
cinit = self.extract_function(res, '$cinit')
cinit([])
return res
def extract_function(self, avm_class, func_name):
p = self._patched_functions.get((avm_class, func_name))
if p:
@ -694,6 +704,14 @@ class SWFInterpreter(object):
obj = stack.pop()
assert isinstance(obj, list)
stack.append(obj[idx])
elif opcode == 104: # initproperty
index = u30()
value = stack.pop()
idx = self.multinames[index]
if isinstance(idx, _Multiname):
idx = stack.pop()
obj = stack.pop()
obj[idx] = value
elif opcode == 115: # convert_
value = stack.pop()
intvalue = int(value)