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From Nick Burch <n...@torchbox.com>
Subject Re: Image extraction
Date Wed, 18 Jan 2006 10:32:23 GMT
On Wed, 18 Jan 2006, Daniel Noll wrote:
> Nick Burch wrote:
>> I've committed Yegor's code (cheers Yegor!). You should look at his comment 
>> on http://issues.apache.org/bugzilla/show_bug.cgi?id=38289 - it shows an 
>> example of how to extract the images
> That looks excellent.
>
> How long until this commit appears in the downloadable snapshots?  For 
> some reason, the Apache Subversion server doesn't work through our Squid 
> proxy, always gives an HTTP 400 error.

You should be able to find it in the latest one from
   http://encore.torchbox.com/poi-cvs-build/

> I've been digging through Excel to try and find where it hides the 
> image.  I can't see the binary as-is in any of the OLE streams.  The 
> only stream big enough to hide the image would be the "Workbook" itself, 
> and there aren't any records in the workbook large enough to be storing 
> a 4kB image.  The only conclusion I can come up with is that it's stored 
> right at the end and not inside a record of any sort.

Have you tried comparing the output from poifs.dev.POIFSViewer to 
hslf.dev.BiffViewer, so see if there is in fact extra data at the end?

Nick

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