Implement KeePass' Global URL Overrides feature

[taurus227]

Summary

Implement the Global URL Overrides feature of KeePass 2.x, that allows the user to define a command line template (with placeholders) for each URL Scheme.
This would enable the user to double-click URLs with schemes like ssh://, vpn:// , ftp:// etc. and have them open in the appropriate app with the username, password, IP address, port etc. properly transferred on the command line.

Examples

If the following is defined on Windows:

URL Overrides

Scheme	Template
ssh:	sh cmd://"C:\Program Files (x86)\Mobatek\MobaXterm\MobaXterm.exe" -newtab "sshpass -p '{PASSWORD}' ssh {USERNAME}@{URL:HOST} -p {T-REPLACE-RX:/{URL:PORT}/-1/22/}"

the KeePass entry can simply store the following:

• Username: username
• Password: password
• URL: ssh://domain:port

Double-clicking the URL will open a MobaXTerm window and connect to the host at the given port (if given, otherwise port 22), logging in with the stored username and password.

Context

Implementing the Global URL Overrides feature inside KeePassXC would make this feature platform-independent, the same URL would work on Linux, Windows and MacOS, as long as the URL Overrides are defined properly on each platform. This would allow the same KeePass database to be shared between all three platforms!

There is a workaround on Windows 11, and also on Linux, but these are platform-dependent.
For Windows 11 the KeePass entry should contain:

• Username: username@host -p port
• Password: password
• URL: cmd://"C:\Program Files (x86)\Mobatek\MobaXterm\MobaXterm.exe" -newtab "sshpass -p '{PASSWORD}' ssh {USERNAME}"

Reference

The documentation for the Global URL Overrides feature is here:

• Open Changing the URL Handler (URL Override)
• Look in the KeePass 2.x Only section
• Under the subtitle: Globally changing the URL behavior: