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Prevent occasional recursion overflows by preventing certain well known

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Python names from triggering an nsIClassInfo lookup.

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markh%activestate.com 2001-08-05 08:25:39 +00:00
parent 4cf6912d7c
commit 368789e543
1 changed files with 12 additions and 1 deletions
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13
extensions/python/xpcom/client/__init__.py
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@ -23,6 +23,10 @@ from xpcom import xpt, COMException, nsError
from xpcom._xpcom import IID_nsISupports, IID_nsIClassInfo, IID_nsISupportsString, IID_nsISupportsWeakReference, \
IID_nsIWeakReference, XPTI_GetInterfaceInfoManager, NS_GetGlobalComponentManager, XPTC_InvokeByIndex
# Attribute names we may be __getattr__'d for, but know we don't want to delegate
# Could maybe just look for startswith("__") but this may screw things for some objects.
_special_getattr_names = ["__del__", "__len__", "__nonzero__"]
_just_int_interfaces = ["nsISupportsPRInt32", "nsISupportsPRInt16", "nsISupportsPRUint32", "nsISupportsPRUint16", "nsISupportsPRUint8", "nsISupportsPRBool"]
_just_long_interfaces = ["nsISupportsPRInt64", "nsISupportsPRUint64"]
_just_float_interfaces = ["nsISupportsDouble", "nsISupportsFloat"]
@ -215,7 +219,9 @@ class Component(_XPCOMBase):
if real_cid is not None:
self.__dict__['_object_name_'] = real_cid
for nominated_iid in classinfo.getInterfaces():
self._remember_interface_info(nominated_iid)
# Interface may appear twice in the class info list, so check this here.
if not self.__dict__['_interface_infos_'].has_key(nominated_iid):
self._remember_interface_info(nominated_iid)
self.__dict__['_com_classinfo_'] = classinfo
def _remember_interface_info(self, iid):
@ -256,6 +262,8 @@ class Component(_XPCOMBase):
queryInterface = QueryInterface # Alternate name.
def __getattr__(self, attr):
if attr in _special_getattr_names:
raise AttributeError, attr
# First allow the interface name to return the "raw" interface
interface = self.__dict__['_interface_names_'].get(attr, None)
if interface is not None:
@ -311,6 +319,9 @@ class _Interface(_XPCOMBase):
def __getattr__(self, attr):
# Allow the underlying interface to provide a better implementation if desired.
if attr in _special_getattr_names:
raise AttributeError, attr
ret = getattr(self.__dict__['_comobj_'], attr, None)
if ret is not None:
return ret