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117 lines (105 loc) · 4.86 KB
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# Copyright (c) 2012-2014 The CEF Python authors. All rights reserved.
# License: New BSD License.
# Website: http://code.google.com/p/cefpython/
# TODO: fix CefContentFilter memory corruption and restore weakrefs
# for PyContentFilter object. Right now getting memory corruption
# when CefRefPtr[CefWebURLRequest] is released after the request
# is completed. The memory corruption manifests itself with the
# "Segmentation Fault" error message or the strange "C function
# name could not be determined in the current C stack frame".
# See this topic on cython-users group:
# https://groups.google.com/d/topic/cython-users/FJZwHhqaCSI/discussion
# After CefWebURLRequest memory corruption is fixed restore weakrefs:
# 1. cdef object g_pyWebRequests = weakref.WeakValueDictionary()
# 2. Add property "cdef object __weakref__" in PyContentFilter
# When using normal dictionary for g_pyWebRequest then the memory
# corruption doesn't occur, but the PyContentFilter and CefContentFilter
# objects are never released, thus you have memory leaks, for now
# there is no other solution. See this topic on the CEF Forum:
# http://www.magpcss.org/ceforum/viewtopic.php?f=6&t=10711
cdef object g_contentFilters = {}
cdef int g_contentFilterMaxId = 0
# ------------------------------------------------------------------------------
# PyContentFilter
# ------------------------------------------------------------------------------
cdef PyContentFilter GetPyContentFilter(int contentFilterId):
global g_contentFilters
if contentFilterId in g_contentFilters:
return g_contentFilters[contentFilterId]
return None
cdef class PyContentFilter:
# cdef object __weakref__ # see g_contentFilters
cdef int contentFilterId
cdef CefRefPtr[CefContentFilter] cefContentFilter
cdef object handler
def __init__(self):
global g_contentFilterMaxId
global g_contentFilters
g_contentFilterMaxId += 1
self.contentFilterId = g_contentFilterMaxId
g_contentFilters[self.contentFilterId] = self
self.cefContentFilter = (
<CefRefPtr[CefContentFilter]?>new ContentFilterHandler(
self.contentFilterId))
def SetHandler(self, handler):
assert handler, "ContentFilterHandler is empty"
has_OnData = hasattr(handler, "OnData") and (
callable(getattr(handler, "OnData")))
has_OnDrain = hasattr(handler, "OnDrain") and (
callable(getattr(handler, "OnDrain")))
assert has_OnData, "ContentFilterHandler is missing OnData() method"
assert has_OnDrain, "ContentFilterHandler is missing OnDrain() method"
self.handler = handler
def HasHandler(self):
return bool(self.handler)
cdef object GetCallback(self, str funcName):
if not self.handler:
return None
if hasattr(self.handler, funcName) and (
callable(getattr(self.handler, funcName))):
return getattr(self.handler, funcName)
cdef CefRefPtr[CefContentFilter] GetCefContentFilter(self) except *:
return self.cefContentFilter
# ------------------------------------------------------------------------------
# C++ ContentFilterHandler
# ------------------------------------------------------------------------------
cdef public void ContentFilterHandler_ProcessData(
int contentFilterId,
const void* data,
int data_size,
CefRefPtr[CefStreamReader]& substitute_data
) except * with gil:
cdef PyContentFilter contentFilter
cdef object callback
cdef PyStreamReader pyStreamReader
try:
contentFilter = GetPyContentFilter(contentFilterId)
if contentFilter:
callback = contentFilter.GetCallback("OnData")
if callback:
pyStreamReader = PyStreamReader()
callback(VoidPtrToString(data, data_size), pyStreamReader)
if pyStreamReader.HasCefStreamReader():
substitute_data.swap(pyStreamReader.GetCefStreamReader())
except:
(exc_type, exc_value, exc_trace) = sys.exc_info()
sys.excepthook(exc_type, exc_value, exc_trace)
cdef public void ContentFilterHandler_Drain(
int contentFilterId,
CefRefPtr[CefStreamReader]& remainder
) except * with gil:
cdef PyContentFilter contentFilter
cdef object callback
cdef PyStreamReader pyStreamReader
try:
contentFilter = GetPyContentFilter(contentFilterId)
if contentFilter:
callback = contentFilter.GetCallback("OnDrain")
if callback:
pyStreamReader = PyStreamReader()
callback(pyStreamReader)
if pyStreamReader.HasCefStreamReader():
remainder.swap(pyStreamReader.GetCefStreamReader())
except:
(exc_type, exc_value, exc_trace) = sys.exc_info()
sys.excepthook(exc_type, exc_value, exc_trace)