Request Lifecycle

Lifecycle

1. HTTP request arrives
2. Middlewares traversed (slot order)
3. Extensions injected (Engine, Tera, Config)
4. Session loaded, CSRF verified
5. Handler called with extractors (Request, Prisme<T>)
6. Handler returns AppResult<Response>
7. Middlewares traversed in reverse order
8. HTTP response sent

1. Clone Arcs

let db = request.engine.db.clone();

2. Forms = per-request copies

Prisme(mut form): Prisme<MyForm>
// Each request = isolated form, zero concurrency

3. context_update! for context

context_update!(request => {
    "title" => "My page",
    "data" => &my_data,
});

4. Flash messages for redirects

success!(request.notices => "Action successful!");
return Ok(Redirect::to("/").into_response());

5. flash_now! for direct rendering

context_update!(request => {
    "messages" => flash_now!(error => "Validation error"),
});