[Koha] How to check a file's MIME type in KOHA

[Rejeesh K.Nair]

Hi All,

I have checked the MIME information of a specific file using its extension.
But actually I need details of exact file.
Say, I have a file like test.jpg , somebody renamed its extension as
test.pdf. If we checked the MIME information of test.pdf, it should display
the output as image/jpeg.

For implementing this , I am trying to integrate *File::MMagic::XS* into
KOHA with the following steps.

   1. Download *File::MMagic::XS* from http://search.cpan.org/~dmaki/
   File-MMagic-XS-0.09008/lib/File/MMagic/XS.pm
   <http://search.cpan.org/%7Edmaki/File-MMagic-XS-0.09008/lib/File/MMagic/XS.pm>
   .
   2. Extract the tar file and put the extracted file into
   usr/share/koha/lib/C4.
   3. Take command  prompt and Use command : cd /usr/share/koha/lib/C4/File-
   MMagic/
   4. Use command: perl Makefile.PL
   5. Use command: make
   6. Use command: make install

After that ,

call *use C4::File-MMagic::lib::File::MMagic::XS;*



*my $m = File::MMagic::XS->new();$m = File::MMagic::XS->new('/etc/magic');
# use external magic filemy $mime = $m->get_mime($source);*

into the  specific page and upload a jpeg file.But I got the MIME type as
*text/plain*

Can someone help on this issue?
Regards,
Rejeesh K.Nair


> On Wed, Feb 1, 2017 at 2:51 PM, Indranil Das Gupta <indradg at gmail.com>
> wrote:
>
>> Hi,
>>
>> You need to look into /usr/share/koha/lib/Koha/Upload.pm
>> and /usr/share/koha/intranet/cgi-bin/tools/upload.pl files.
>>
>> The perl module file is place where you need to write up the new function
>> to handle the mimetype and then call that function from upload.pl script.
>>
>> hope this helps
>> -idg
>>
>> --
>> Indranil Das Gupta
>> L2C2 Technologies
>>
>> Phone : +91-98300-20971 <098300%2020971>
>> WWW  : http://www.l2c2.co.in
>> Blog    : http://blog.l2c2.co.in
>> IRC     : indradg on irc://irc.freenode.net
>> Twitter : indradg
>>
>> On Tue, Jan 31, 2017 at 10:48 AM, Rejeesh K.Nair <rejeeshknair at gmail.com>
>> wrote:
>>
>>> Hi Indranil,
>>>
>>> Thank you for your quick reply.
>>>
>>> Could you please help me, how to integrate the code to check the MIME
>>> type in KOHA?
>>>
>>> Regards,
>>> Rejeesh K Nair
>>>
>>> On Mon, Jan 30, 2017 at 3:14 PM, Indranil Das Gupta <indradg at gmail.com>
>>> wrote:
>>>
>>>> Hi Rajeesh,
>>>>
>>>> On Mon, Jan 30, 2017 at 10:52 AM, Rejeesh K.Nair <
>>>> rejeeshknair at gmail.com> wrote:
>>>>
>>>>
>>>>> I need to check the MIME type of each uploaded file for security
>>>>> purposes.
>>>>>
>>>>> Some search results from Google suggest that we can do it with the
>>>>> help of
>>>>> the File::MimeInfo <https://metacpan.org/pod/File::MimeInfo>Perl
>>>>> module.
>>>>>
>>>>> How can we install the File::MimeInfo module in KOHA and check the MIME
>>>>> types, or is there some better way?
>>>>>
>>>>
>>>> IIRC, that sort of generic mimetype detection functionality does not
>>>> exist in Koha. From the top of my head, the only place where we actively
>>>> check for mimetype is the image upload option using GD which is basically
>>>> restricted to a few image formats like PNG, JPEG, XPM etc.
>>>>
>>>> Short answer: To implement this on the server side, you have to write
>>>> the necessary code. As a stop gap, you *could* use the Javascript
>>>> FileReader object to check the mimetype on the client side. but that is not
>>>> a fool proof  solution.
>>>>
>>>> hope this helps.
>>>> --
>>>> Indranil Das Gupta
>>>> L2C2 Technologies
>>>>
>>>> Phone : +91-98300-20971 <098300%2020971>
>>>> WWW  : http://www.l2c2.co.in
>>>> Blog    : http://blog.l2c2.co.in
>>>> IRC     : indradg on irc://irc.freenode.net
>>>> Twitter : indradg
>>>>
>>>
>>>
>>>
>>> --
>>> Thanks & Regards,
>>>
>>> Rejeesh K.Nair
>>> m: +91 (0) ​9495316906 <+91%2094953%2016906>
>>> e: rejeeshknair at gmail.com
>>> <https://www.facebook.com/rejeeshnairk>
>>> <https://twitter.com/rejeeshknair>
>>> <http://in.linkedin.com/in/rejeeshknair>
>>> <https://www.instagram.com/rejeeshknair/>
>>>
>>>
>>
>
>
> --
> Thanks & Regards,
>
> Rejeesh K.Nair
> m: +91 (0) ​9495316906 <094953%2016906>
> e: rejeeshknair at gmail.com
> <https://www.facebook.com/rejeeshnairk> <https://twitter.com/rejeeshknair>
> <http://in.linkedin.com/in/rejeeshknair>
> <https://www.instagram.com/rejeeshknair/>
>
>


-- 
Thanks & Regards,

Rejeesh K.Nair
m: +91 (0) ​9495316906
e: rejeeshknair at gmail.com
<https://www.facebook.com/rejeeshnairk> <https://twitter.com/rejeeshknair>
<http://in.linkedin.com/in/rejeeshknair>
<https://www.instagram.com/rejeeshknair/>