Module extract 

FromRequest — typed extractors for controller actions.

A controller signature says what it needs and the framework supplies it, with the types doing the describing:

async fn store(Json(post): Json<NewPost>, Query(page): Query<Pagination>) -> Response

Every extractor takes Arc<Request> and returns a 'static future. Sharing one Arc is what lets several extractors read the same request concurrently-shaped without cloning it or fighting over a borrow, and the 'static future is what lets the router store handlers of many different shapes in one table.

Extraction is async because some extractors genuinely need to be: route model binding loads a record from the database, and an authenticated-user extractor asks the guard. Those live in rainier-database and rainier-auth respectively; the ones here need no I/O but share the shape.

Structs

Bearer

The Authorization: Bearer … token.

Files

Every file uploaded under a named field. Empty when none arrived.

Form

The merged request input (query string plus body), deserialised with string coercion — so a urlencoded page=2 fills a u32 field.

Header

A named header’s value, required.

Json

The JSON request body, deserialised.

Path

The route parameters, deserialised with string coercion.

Query

The query string, deserialised with string coercion.

RawBody

The raw request body.

Traits

FromRequest

Something a handler parameter can be built from.

StaticName

A compile-time name for an extractor that needs one — a header, a form field.