Hello all,
some time ago was trying to implement OnBeforeNavigate2 callback in
python. (DWebBrowserEvents2 -
http://msdn.microsoft.com/en-us/library/aa768283(VS.85).aspx)
BeforeNavigate2 has 7 parameters, 1 marked as [in,out] and the rest 6 as
[in] only. The one out parameter (Cancel) controls whether page will be
navigated to or not, depending what you return.
This definition come straight to following implementation. (which
doesnt work)
<snip>
#this version doesnt work
def OnBeforeNavigate2(self, pDisp, .... Cancel):
print URL
if self.pageNotAllowed(URL):
return True #do not navigate there
return False #Navigate there
</snip>
After some debugging of pywin32 package, I found that not only the 1
param is passed by variant "by_ref" but 6 of them, even if the
parameters are not "out" parameters my IE uses them as "by_ref"
<snip>
#this version works fine
def OnBeforeNavigate2(self, pDisp, .... Cancel):
print URL
if self.pageNotAllowed(URL):
return None, None, None, None, None, True
return None, None, None, None, None, False
</snip>
Question:
If I understand correctly this python callback implementation is IE
implementation dependent. If some new version of IE will start to call
this callback with [lets say]4 "by_ref" params only. Then this will stop
work.
Is it possible to write python code independent of number "by_ref"
parameters passed?
Thanks,
Vaclav
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