Re: [Denemo-devel] [evince] ev_document_factory_get_document not loading pdf file

[Richard Shann]

Jeremiah - here is the response from the evince list about the
text/plain value.
Can you run the
ev_file_get_mime_type("file:///tmp/DenemoYBsSdY/denemoprintB.pdf", 0,
NULL)
call he suggests, the different second parameter is a boolean which
toggles between "fast" mime type detection and slow. We were calling for
"fast".

He gives a helpful reference to where in the code this is going on ...
email is below
Richard
8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><
On Tue, Mar 19, 2013 at 9:48 AM, Richard Shann
<address@hidden> wrote:
> Hi Hib,
>
> I have had some feedback from Jeremiah who is working with the Mac on
> the evince library build, he ran the call to
>
> ev_file_get_mime_type("file:///tmp/DenemoYBsSdY/denemoprintB.pdf", 1,
NULL)
>
> in gdb and got back the string
>
>  "text/plain"

"text/plain" is obviously not correct, it should be something with
'pdf' in it I guess.

Could you see what

ev_file_get_mime_type("file:///tmp/DenemoYBsSdY/denemoprintB.pdf", 0,
NULL)

gives back as well?

Evince code for mime type detection is in libdocument/ev-file-helpers.c.
I'm afraid it is a bit unpredictable when glib fails to find the
correct mime-type/content-type.

On Tue, 2013-03-19 at 00:46 -0500, Jeremiah Benham wrote:
> I decided to hack on evince a bit. I put a few lines of code in to set
> the evince module dir based on environment variable. I am also going
> to force all files to be pdf if the filename ends with .pdf so that we
> don't have to mess wity mime stuff. 
> 
> Jeremiah
> 
> On Mar 18, 2013 5:58 PM, "Jeremiah Benham"
> <address@hidden> wrote:
>         On 3/18/13, Richard Shann <address@hidden> wrote:
>         > Jeremiah -
>         >
>         > I have received this very informative reply from Hib Eris -
>         would you like
>         > me to put a print-out of ev_file_get_mime_type() into the
>         sources
>         > or are you able to do
>         >
>         > call ev_file_get_mime_type
>         ("file:///tmp/Denemou<xxx>/denemoprintB.pdf", 1,
>         > NULL)
>         >
>         > while in gdb? (The temp directory will be <xxx> and you need
>         either A or B
>         > depending).
>         
>         I ran this in gdb:
>         (gdb) print (char *) ev_file_get_mime_type
>         ("file:///tmp/DenemoYBsSdY/denemoprintB.pdf", 1, NULL)
>         
>         This is what it returned:
>         $3 = 0x76836c0 "text/plain"
>         
>         I ran:
>         file /tmp/DenemoYBsSdY/denemoprintB.pdf
>         it returned:
>         /tmp/DenemoYBsSdY/denemoprintB.pdf: PDF document, version 1.4
>         
>         >
>         > or can you just
>         check /usr/lib/evince/4/backends/pdfdocument.evince-backend
>         
>         It looks ok. At the end it has:
>         
> MimeType=application/pdf;application/x-bzpdf;application/x-gzpdf;application/x-ext-pdf
>         I appended:
>         ;text/plain;application/octet-stream
>         
>         Unfortunately it is still not loading. I am going to have to
>         do some
>         tinkering I guess. I am not sure if this
>         pdfdocument.evince-backend is
>         even being read. I will let you know later my progress or lack
>         of.
>         
>         Jeremiah
>         
>         > first (I would guess it is ok)
>         > and look at the other fix - the "register the pdf mime type
>         somewhere in
>         > your OS specific mime type
>         > store" thing.
>         > The email exchange follows
>         > Richard
>         >
>         
> 8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><8><
>         >
>         > Hi Richard,
>         >
>         > On Sun, Mar 17, 2013 at 4:10 PM, Richard Shann
>         <address@hidden>
>         > wrote:
>         >> Running GNU/Denemo on Mac OSX we use
>         ev_document_factory_get_document()
>         >> to load a pdf file. On this platform (only) the call fails
>         with the
>         >> message
>         >>
>         >> File type application/octet-stream type
>         (application/octet-stream) is
>         >> not supported
>         >>
>         >> Can anyone suggest what might be wrong? The call is working
>         fine on
>         >> GNU/Linux and on Windows.
>         >
>         > Previously, I've run into the same problem when porting
>         Evince to
>         > Windows. It has something to do with Evince' mime-type
>         > detection/handling. I think there were several issues with
>         it.
>         >
>         > First step to fixing this is to see what this evince
>         function returns:
>         >
>         > mime_type = ev_file_get_mime_type (uri, TRUE, error);
>         >
>         > If that returns 'application/octet-stream', I guess you need
>         to
>         > register the pdf mime type somewhere in your OS specific
>         mime type
>         > store.
>         >
>         > If the mime type is something like 'application/pdf', then
>         make sure
>         > the returned mimetype is specified in the file
>         > /usr/lib/evince/4/backends/pdfdocument.evince-backend.
>         >
>         > Regards,
>         >
>         > Hib Eris
>         >
>         >
>         >
>         >
>         >
>         >
>         >
>         >
>         >
>         >
>         >
>         > That
>         >
>         >
>         >
>         > _______________________________________________
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>         > https://lists.gnu.org/mailman/listinfo/denemo-devel
>         >