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==How To==
{{fmt/title|How to add a custom protocol}}
===custom protocol===
The following instructions were adapted from ChatGPT<ref name=chatgpt1 /> but tested and modified slightly for clarity.
'''Q:''' How can I add a custom protocol to xdg-open?
==Create a custom desktop file==
Create a new desktop file for your custom protocol. Desktop files usually have a <code>.desktop</code> extension and are located in the <code>/usr/share/applications/</code> directory or <code>~/.local/share/applications/</code> for user-specific settings.</p><p>Example (<code>custom-protocol.desktop</code>):</p>
[Desktop Entry]
Name=Custom Protocol Handler
Exec=/path/to/your/custom-protocol-handler %U
Terminal=false
Type=Application
MimeType=x-scheme-handler/{{arg|protocol name}};
That is: if your custom protocol is (e.g.) "wooz://{{arg|URI}}", then '''MimeType''' should be set to <code>x-scheme-handler/wooz</code>.


According to ChatGPT<ref name=chatgpt1 /> (these instructions are either incomplete, incorrect, or misleading):
* <strong>Create a custom desktop file:</strong>
Create a new desktop file for your custom protocol. Desktop files usually have a <code>.desktop</code> extension and are located in the <code>/usr/share/applications/</code> directory or <code>~/.local/share/applications/</code> for user-specific settings.</p><p>Example (<code>custom-protocol.desktop</code>):</p>
<syntaxhighlight lang=ini>
[Desktop Entry]
Name=Custom Protocol Handler
Exec=/path/to/your/custom-protocol-handler %U
Terminal=false
Type=Application
MimeType=x-scheme-handler/custom-protocol;
</syntaxhighlight>
Customize the <code>Exec</code> line to point to the executable that will handle your custom protocol.
Customize the <code>Exec</code> line to point to the executable that will handle your custom protocol.
* <strong>Update MIME types:</strong>
==Update MIME types==
Open the file <code>/usr/share/applications/mimeinfo.cache</code> or <code>~/.local/share/applications/mimeinfo.cache</code> and add the following line:
Open the file <code>/usr/share/applications/mimeinfo.cache</code> or <code>~/.local/share/applications/mimeinfo.cache</code> and add the following line:
<blockquote>
x-scheme-handler/{{arg|protocol name}}=custom-protocol.desktop;
x-scheme-handler/custom-protocol=custom-protocol.desktop;
 
</blockquote>
If the <code>mimeinfo.cache</code> file doesn't exist, you may need to create it.
If the <code>mimeinfo.cache</code> file doesn't exist, you may need to create it.
* <strong>Update the MIME database:</strong>
==Update the MIME database==
Run the following command to update the MIME database:
Run the following command to update the MIME database:
<syntaxhighlight lang=bash>
<syntaxhighlight lang=bash>
Line 32: Line 26:
sudo update-desktop-database /usr/share/applications/
sudo update-desktop-database /usr/share/applications/
</syntaxhighlight>
</syntaxhighlight>
* <strong>Test your custom protocol:</strong>
==Test your custom protocol==
After completing the above steps, you should be able to use <code>xdg-open</code> with your custom protocol. For example:
After completing the above steps, you should be able to use <code>xdg-open</code> with your custom protocol. For example:
<syntaxhighlight lang=bash>
xdg-open {{arg|protocol name}}://example
xdg-open custom-protocol://example
 
</syntaxhighlight>
This should launch the specified handler for your custom protocol.</p></li></ol><p>Remember to replace "custom-protocol" with your actual protocol name and update file paths accordingly. Additionally, depending on your desktop environment, there may be slight variations in the steps. If your desktop environment supports <code>xdg-open</code>, these general steps should work.
This should launch the specified handler for your custom protocol.</p></li></ol><p>Remember to replace "custom-protocol" with your actual protocol name and update file paths accordingly. Additionally, depending on your desktop environment, there may be slight variations in the steps. If your desktop environment supports <code>xdg-open</code>, these general steps should work.
==Footnotes==
==Footnotes==

Latest revision as of 00:46, 3 January 2024

How to add a custom protocol

{{#set: page title=How to add a custom protocol }}

The following instructions were adapted from ChatGPT<ref name=chatgpt1 /> but tested and modified slightly for clarity.

Create a custom desktop file

Create a new desktop file for your custom protocol. Desktop files usually have a .desktop extension and are located in the /usr/share/applications/ directory or ~/.local/share/applications/ for user-specific settings.

Example (custom-protocol.desktop):

[Desktop Entry]
Name=Custom Protocol Handler
Exec=/path/to/your/custom-protocol-handler %U
Terminal=false
Type=Application
MimeType=x-scheme-handler/<protocol name>;

That is: if your custom protocol is (e.g.) "wooz://<URI>", then MimeType should be set to x-scheme-handler/wooz.

Customize the Exec line to point to the executable that will handle your custom protocol.

Update MIME types

Open the file /usr/share/applications/mimeinfo.cache or ~/.local/share/applications/mimeinfo.cache and add the following line:

x-scheme-handler/<protocol name>=custom-protocol.desktop;

If the mimeinfo.cache file doesn't exist, you may need to create it.

Update the MIME database

Run the following command to update the MIME database:

update-desktop-database ~/.local/share/applications/

If you added the desktop file to the system-wide directory (/usr/share/applications/), you might need to run the command with superuser privileges:

sudo update-desktop-database /usr/share/applications/

Test your custom protocol

After completing the above steps, you should be able to use xdg-open with your custom protocol. For example:

xdg-open <protocol name>://example

This should launch the specified handler for your custom protocol.

Remember to replace "custom-protocol" with your actual protocol name and update file paths accordingly. Additionally, depending on your desktop environment, there may be slight variations in the steps. If your desktop environment supports xdg-open, these general steps should work.

Footnotes

<references> <ref name=chatgpt1>2024-01-01 ChatGPT 3.5, in response to "How can I add a custom protocol to xdg-open?"</ref> </references>