Have you checked DiffPDF?
It's supposed to do what you're looking for, although it's no-longer actively maintained (author took it closed-source :( ).
Another alternative might be to use pdf2ps (part of ghostscript) to transform into postscript and compare that, but you may need to do more massaging as timestamps and such would probably still be in the postscript.
On 02/01/2017 01:29 AM, der.hans wrote:
> moin moin,
>
> I have some dynamically generated PDFs coming from a pool of web servers.
>
> Each server should be generating a PDF that looks exactly the same as from
> all the other servers.
>
> The PDF generation includes sticking in a few timestamps and possibly some
> hostnames or other dynamic content. The dynamic content eliminates the
> option of just using checksums to verify the output file is the same from
> all of the web servers.
>
> Any suggestions on how I can write a command line check. Needing to
> install a script would be far less than ideal in this situation. Funnily
> enough, needing to install a package would be less of an issue in this
> particular case, especially something in CentOS 6.
>
> Me being me, I did try to just grep out the lines with timestamps :). That
> didn't quite work :(. That probably indicates the files aren't as exactly
> the same as I hope.
>
> I didn't see a pdf2sanity tool. pdf2text won't really work as I need to
> verify the graphic content and hopefully the PDF wrapper.
>
> ciao,
>
> der.hans
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