Flash

Éste Middleware provee soporte a la funcionalidad de Flash Message.

El FlashStore provee acceso a los datos. CookieStore almacena los datos en Cookie. Mientras que SessionStore almacena los datos en Session, SessionStore tiene que ser usado con session.

Ejemplo

Usando almacenamiento en cookie (cookie store)

use std::fmt::Write;

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

#[handler]
pub async fn set_flash(depot: &mut Depot, res: &mut Response) {
    let flash = depot.outgoing_flash_mut();
    flash.info("Hey there!").debug("How is it going?");
    res.render(Redirect::other("/get"));
}

#[handler]
pub async fn get_flash(depot: &mut Depot, _res: &mut Response) -> String {
    let mut body = String::new();
    if let Some(flash) = depot.incoming_flash() {
        for message in flash.iter() {
            writeln!(body, "{} - {}", message.value, message.level).unwrap();
        }
    }
    body
}

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt().init();

    let router = Router::new()
        .hoop(CookieStore::new().into_handler())
        .push(Router::with_path("get").get(get_flash))
        .push(Router::with_path("set").get(set_flash));
    let acceptor = TcpListener::new("127.0.0.1:5800").bind().await;
    Server::new(acceptor).serve(router).await;
}

[package]
name = "example-flash-cookie-store"
version = "0.1.0"
edition = "2021"
publish = false

[dependencies]
salvo = { workspace = true, features = ["flash"] }
tokio = { version = "1", features = ["macros"] }
tracing = "0.1"
tracing-subscriber = "0.3"

Usando almacenamiento de la sesión (session store)s

use std::fmt::Write;

use salvo::flash::{FlashDepotExt, SessionStore};
use salvo::prelude::*;

#[handler]
pub async fn set_flash(depot: &mut Depot, res: &mut Response) {
    let flash = depot.outgoing_flash_mut();
    flash.info("Hey there!").debug("How is it going?");
    res.render(Redirect::other("/get"));
}

#[handler]
pub async fn get_flash(depot: &mut Depot, _res: &mut Response) -> String {
    let mut body = String::new();
    if let Some(flash) = depot.incoming_flash() {
        for message in flash.iter() {
            writeln!(body, "{} - {}", message.value, message.level).unwrap();
        }
    }
    body
}

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt().init();

    let session_handler = salvo::session::SessionHandler::builder(
        salvo::session::MemoryStore::new(),
        b"secretabsecretabsecretabsecretabsecretabsecretabsecretabsecretab",
    )
    .build()
    .unwrap();
    let router = Router::new()
        .hoop(session_handler)
        .hoop(SessionStore::new().into_handler())
        .push(Router::with_path("get").get(get_flash))
        .push(Router::with_path("set").get(set_flash));
    let acceptor = TcpListener::new("127.0.0.1:5800").bind().await;
    Server::new(acceptor).serve(router).await;
}

[package]
name = "example-flash-session-store"
version = "0.1.0"
edition = "2021"
publish = false

[dependencies]
salvo = {  workspace = true, features=["flash", "session"] }
tokio = { version = "1", features = ["macros"] }
tracing = "0.1"
tracing-subscriber = "0.3"