[cups] Can't detect file type / Not a PDF file

[Brian Potkin]

On Thu 02 May 2019 at 15:20:11 +0100, Henrik Morsing wrote:

> On Thu, May 02, 2019 at 04:10:44PM +0200, Helge Blischke wrote:
> > 
> > I’d file a bug at openprinting.org for the gstoraster (and possibly other) filter(s)
> > and suggest as a possible solution to read the environment variable
> > CONTENT_TYPE
> > instead
> > and check the contents for
> > application/postscript
> > of
> > application/pdf
> > 
> > It is not necessary to strip the HP control statements, as Ghostscript’s PS interpreter
> > defines these as no ops.
> > 
> 
> Hi,
> 
> Thanks for suggesting that and thanks to everyone trying to sort this
> out.
> 
> I think my first step will be to upgrade from Stretch to Buster
> (testing) and see if the filter upgrade fixes it, if not, I will go to
> OpenPrinting.

I do not observe this with cups-filters 1.21.6-5. It was probably fixed
in 1.20.3 with

    - gstoraster: Improved detection whether input is PostScript
      or PDF by skipping over possible headers. Thanks to Rod
      Schmidt (schmidtrod at q dot com) for the patch.

-- 
Brian.