Differences

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--- doc:appunti:linux:tux:mimetype [2020/09/17 12:36] – [Web References] niccolo
+++ doc:appunti:linux:tux:mimetype [2020/09/23 21:43] (current) – [MIME Type application/x-image-playlist] niccolo
@@ Line 56: / Line 56: @@
 <code xml>
+<!-- WARNING! This file is not optimal, see below for the final version. -->
 <?xml version="1.0" encoding="UTF-8"?>
 <mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
@@ Line 159: / Line 160: @@
 </code>
-We check also the behaviour of the Firefox browser, we prepare an HTML file containing this (notice the **anchor** tag uses the **type** attribute to declare the proper MIME type):
+We check also the behaviour of the **Firefox** browser, we prepare an HTML file containing this (notice the **anchor** tag uses the **type** attribute to declare the proper MIME type):
 <code xml>
@@ Line 167: / Line 168: @@
 Once clicked the link, Firefox displays the //Open with...// dialog box suggesting to use **VLC** to open the **MPEG Audio URL**.  If you click over the //Other...// option, Firefox says **No applications found for "M3U Images Playlist" files**. The MIME Type is recognized, but the application to handle it is unknown.
-Prepare a file and save it as **/usr/local/share/applications/photo-reframe.desktop**:
+Now we prepare a file and save it as **/usr/local/share/applications/photo-reframe.desktop**:
 <file>
@@ Line 190: / Line 191: @@
 </file>
-FIXME To be continued...
+then we run the **update-desktop-database** over that directory (it will update the **mimeinfo.cache** file in the same directory):
+<code>
+update-desktop-database /usr/local/share/applications/
+</code>
+Something good has happened; the system knows how to handle that MIME type:
+<code>
+xdg-mime query default application/x-image-playlist
+photo-reframe.desktop
+</code>
+After this step, Firefox suggests to use **Photo-Reframe (default)** to handle the link, you can check the box **Do this automatically for files like this from now on** and the associated application will be launched automatically whenever you will click over a link like this. Only after this association, you can open the Firefox **Preferences** => **Applications** and browse for the //M3U Images Playlist// and assign the preferred action.
+**NOTICE**: You may need to use **Shift-Click** to force the reloading of the link, otherwise Firefox may get the object from the cache, where the MIME type is cached too.
+===== Useless recipes =====
+There are many recipes to add a new MIME Type and an associated applications, many of them suggest to edit some system files. In our experience it is **absolutely useless to modify** the following files:
+  * /etc/mailcap
+  * /etc/mime.types
+  * $HOME/.mozilla/firefox/<profile>.default/mimeTypes.rdf
+  * $HOME/.mozilla/firefox/<profile>.default/handlers.json
 ===== Opening local files from an HTTP page =====
@@ Line 219: / Line 244: @@
   * **[[https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types|MIME types (IANA media types)]]**
   * **[[https://www.december.com/html/spec/mime.html|MIME Types]]**
+  * **[[http://kb.mozillazine.org/Links_to_local_pages_do_not_work|Links to local pages do not work]]**