[cups-devel] [UNKN] STR #4494: FINAL_CONTENT_TYPE incorrectly always set to printer/*

[Pierre Ossman]

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[STR New]

Up until CUPS 1.5.4 FINAL_CONTENT_TYPE contained the content type of the
data given to the backend filter. Somewhere between that version and 1.6.4
it instead started to always be set to printer/<queue name>. This of course
breaks backends that support multiple formats and need to know which one it
is they got.

I suspect it has something to do with this extra filter, that showed up in
the logs at the same time:

D [03/Oct/2014:14:21:14 +0200] [Job 17] - (application/pdf to
printer/thinlocal, cost 0)

So FINAL_CONTENT_TYPE is still being set to the final filter output format.
It's just that some extra implicit filter has been added that screws
everything up.

No environment variable contains the actual format, so right now backends
have to resort to trying to figure out the type from the content, which is
less than ideal.

Link: https://www.cups.org/str.php?L4494
Version: 1.7.4
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