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Re: How IE handles URL's

From: David Boyle (David.BoyleED.TADPOLE.COM)
Date: Mon Dec 15 2003 - 04:20:59 CST

> -----Original Message-----
> From: Duane Maurer [mailto:duaneramaHOTMAIL.COM]
> Sent: 12 December 2003 03:23
> To: NTBUGTRAQLISTSERV.NTBUGTRAQ.COM
> Subject: How IE handles URL's
>
>
> Russ: Feel free to rewrite this as much as you want...
>
> IE uses URL Monikers (a COM object used to parse a name of
> another object,
> kinda like a string pointer to another object) to parse out
> URL's by passing
> substrings to a few COM objects for each part, from the file
> urlmon.dll (Url
> Moniker) and that the problem is probably with the BSTR-
> (Unicode string
> with length not expecting NULLs)

<snip>

Just to clarify - a BSTR is a length-prefixed string of OLECHARs (Unicode
chars) that may contain NULLs.

<snip>

> Anyway, urlmon.dll should be the only file changed... and
> everyone on this
> list needs to know that IE is very COM based and therefore
> everything is
> broken down into a number of little objects, each of which
> has to be perfect
> to prevent lame bugs like this one... Apparently they are not...

<snip>

COM-based does not imply "little objects, each of which has to be
perfect..." Indeed, COM is often used in conjunction with the Facade design
pattern which results in a single COM object being used to represent a group
of inter-related C++ objects. As for having to be perfect to prevent lame
bugs - this doesn't make much sense to me. What is it about COM that
mandates perfection?

Cheers,

Dave

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