Wiki source for HowToAddMIMEType


Show raw source

[[HomePage]] > [[ComponentHowTo Components and HowTos]] > [[FileTypes]]

==== How To Add MIME-Types ====
~**MIME-types** define different file types allowing the operating system to deal with them correctly. Many generic file types are already defined in Puppy such as Jpegs and ""Mp3s"". These are defined by [[XML]] description files in the [[FreeDesktopOrg freedesktop.org's]] package [[SharedMimeInfo shared-mime-info]]. If a program only a generic filetype rather than a specific format there is no need to add a MIME-type - instead [[AssociateFiles associate]] existing MIME-type to that program.

==Add new MIME-Type - method one - update-mime-database==
~1. This method cannot be used in standard Puppy. It requires XML description files and command ##update-mime-database##. These are often provided by loading the appropriate [[devx devx sfs]].
---
~Caution: running ##update-mime-database## without the XML descriptions will remove most of your MIME-types stored in globs, globs2 etc. To add a MIME-type without needing add all descriptions see below.
---
~2. Provide extra MIME-type information to add in an XML description file located at ##/usr/share/mime/packages/##
---
~For example this is [[Audacity Audacity's]], ##/usr/share/mime/packages/audacity.xml##
~%%(xml)
<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
<mime-type type="application/x-audacity-project">
<sub-class-of type="text/xml"/>
<comment>Audacity project</comment>
<glob pattern="*.aup"/>
</mime-type>
</mime-info>
%%
---
~3. This information is then added to various files in using the command ##update-mime-database /usr/share/mime## (files updated include globs, globs2, magic, subclasses, aliases, icons, generic-icons, XMLnamespaces and mime.cache).
---
~Note in standard Puppy as the XML descriptions in ##/usr/share/mime/...## and the command ##update-mime-database## have been removed - this saves about 2.5Mb of space.

==Add new MIME-Type - method - append mime files==
~This method works without loading the [[devx devx sfs]].
---
~All [[ROXFiler ROX]] needs is an extra line adding to various files in ##/usr/share/mime## (minimally just ##globs##). The ##echo## and ##"">>""## commands can do this. For example, observing ##update-mime-database## on audacity.xml the equilavent code is:
---
~%%(bash)
#add mime-type (without using update-mime-database)
echo application/x-audacity-project:*.aup >> /usr/share/mime/globs
echo 50:application/x-audacity-project:*.aup >> /usr/share/mime/globs2
echo application/x-audacity-project text/xml >> /usr/share/mime/subclasses
echo application/x-audacity-project >> /usr/share/mime/types
%%
---
~The above code can be added to the ##pinstall.sh## file in a [[PETs PET]] package.
---
~To reverse the process on uninstall use code below, it removes the lines added. Put them in the ##puninstall.sh## file of a package (take care as mistakes can break MIME-Types):
---
~%%(bash)
#remove mime-type on uninstall (without using update-mime-database)
sed -i '/application\/x-audacity-project:\*.aup$/ d' /usr/share/mime/globs
sed -i '/50:application\/x-audacity-project:\*.aup$/ d' /usr/share/mime/globs2
sed -i '/application\/x-audacity-project text\/xml$/ d' /usr/share/mime/subclasses
sed -i '/application\/x-audacity-project$/ d' /usr/share/mime/types
%%
---
~You should still include the XML MIME-type description, otherwise if ##update-mime-database## is used the added lines will be removed but new description written.

==Also see==
~[[AssociateFiles]] - How Associate filetypes
~[[InternetMediaTypes Internet Media Types]]

----
==Categories==
CategoryFilesystem
CategoryComponent
CategoryTutorial

Valid XHTML :: Valid CSS: :: Powered by WikkaWiki