Salvo Flash Messages

[dependencies]
salvo = { version = "0.89.3", features = ["flash"] }

FlashHandler middleware stores messages between requests. The set (outgoing) is written by the current handler, the previous request's messages are loaded into the "incoming" slot before handlers run, and the old entries are cleared automatically after display.

Cookie store

use std::fmt::Write;
use salvo::flash::{CookieStore, FlashDepotExt};
use salvo::prelude::*;