Trait FromRequest 

pub trait FromRequest<S, B = BoxBody>: Sized {
    type Rejection: IntoResponse;
    type Future: Future<Output = Result<Self, Self::Rejection>> + Send;

    // Required method
    fn from_request(req: Request<B>, state: &S) -> Self::Future;
}

Extract a typed value that may need the request body (e.g. Json<T>).

Only one FromRequest extractor may appear per handler, and it must be the last argument, since it consumes the body.

Required Associated Types

type Rejection: IntoResponse

The response returned when extraction fails.

type Future: Future<Output = Result<Self, Self::Rejection>> + Send

The future returned by [from_request].

Required Methods

fn from_request(req: Request<B>, state: &S) -> Self::Future

Perform the extraction, consuming the request.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<S: Clone + Send + 'static> FromRequest<S> for State<S>

State also implements FromRequest so it can be the last argument in a multi-extractor handler tuple. The body is split off and dropped.

type Rejection = Infallible

type Future = Pin<Box<dyn Future<Output = Result<State<S>, <State<S> as FromRequest<S>>::Rejection>> + Send>>