Catcher
If the status code of Response returned by the request is an error, and the Body in the page is empty, then salvo will try to use Catcher to catch the error and display a friendly error page.
A simple way to create a custom Catcher is to return a system default Catcher via Catcher::default(), and then add it to Service.
use salvo::catcher::Catcher;
Service::new(router).with_catcher(Catcher::default());
The default Catcher supports sending error pages in XML, JSON, HTML, Text formats.
You can add a custom error catcher to Catcher by adding hoop to the default Catcher. The error catcher is still Handler.
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