viz_core

Trait Handler

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pub trait Handler<Input>:
    Send
    + Sync
    + 'static {
    type Output;

    // Required method
    fn call<'life0, 'async_trait>(
        &'life0 self,
        input: Input,
    ) -> Pin<Box<dyn Future<Output = Self::Output> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

A simplified asynchronous interface for handling input and output.

Composable request handlers.

Required Associated Types§

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type Output

The returned type after the call operator is used.

Required Methods§

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fn call<'life0, 'async_trait>( &'life0 self, input: Input, ) -> Pin<Box<dyn Future<Output = Self::Output> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Performs the call operation.

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impl<F, I, Fut, O> Handler<I> for F
where I: Send + 'static, F: Fn(I) -> Fut + Clone + Send + Sync + 'static, Fut: Future<Output = O> + Send,

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type Output = <Fut as Future>::Output

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impl<H, F, I, O> Handler<I> for After<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, F: Handler<H::Output, Output = H::Output>,

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type Output = <F as Handler<<H as Handler<I>>::Output>>::Output

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impl<H, F, I, O> Handler<I> for AndThen<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, F: Handler<O, Output = H::Output>, O: Send,

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type Output = <F as Handler<O>>::Output

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impl<H, F, I, O> Handler<I> for Around<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>> + Clone, F: Handler<Next<I, H>, Output = H::Output>,

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type Output = <F as Handler<(I, H)>>::Output

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impl<H, F, I, O> Handler<I> for Before<H, F>
where I: Send + 'static, F: Handler<I, Output = Result<I>>, H: Handler<I, Output = Result<O>>,

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type Output = <H as Handler<I>>::Output

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impl<H, F, I, O> Handler<I> for OrElse<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, F: Handler<Error, Output = H::Output>, O: Send,

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type Output = <F as Handler<Error>>::Output

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impl<H, F, I, O, E> Handler<I> for MapErr<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O, E>>, F: FnOnce(E) -> Error + Send + Sync + Copy + 'static,

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type Output = Result<O, Error>

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impl<H, F, I, O, R> Handler<I> for CatchUnwind<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, O: IntoResponse + Send, F: Handler<Box<dyn Any + Send>, Output = R>, R: IntoResponse,

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type Output = Result<Response<Body>, Error>

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impl<H, F, I, O, T> Handler<I> for Map<H, F>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, F: FnOnce(O) -> T + Send + Sync + Copy + 'static,

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type Output = Result<T, Error>

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impl<H, I, O> Handler<I> for MapInToResponse<H>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, O: IntoResponse,

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type Output = Result<Response<Body>, Error>

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impl<H, I, O, F, E, R> Handler<I> for CatchError<H, F, E, R>
where I: Send + 'static, H: Handler<I, Output = Result<O>>, O: IntoResponse + Send, E: Error + Send + 'static, F: Handler<E, Output = R>, R: IntoResponse + 'static,

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type Output = Result<Response<Body>, Error>

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impl<H, O> Handler<Request<Body>> for CompressionMiddleware<H>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate feature compression only.
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type Output = Result<Response<Body>, Error>

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impl<H, O> Handler<Request<Body>> for CookieMiddleware<H>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate feature cookie only.
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type Output = Result<Response<Body>, Error>

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impl<H, O> Handler<Request<Body>> for CorsMiddleware<H>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate feature cors only.
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type Output = Result<Response<Body>, Error>

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impl<H, O> Handler<Request<Body>> for LimitsMiddleware<H>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate feature limits only.
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type Output = Result<Response<Body>, Error>

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impl<H, O> Handler<Request<Body>> for MetricsMiddleware<H>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate features params and otel and otel-metrics only.
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type Output = Result<Response<Body>, Error>

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impl<H, O, S, G, V> Handler<Request<Body>> for CsrfMiddleware<H, S, G, V>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse, S: Fn() -> Result<Vec<u8>> + Send + Sync + 'static, G: Fn(&[u8], Vec<u8>) -> Vec<u8> + Send + Sync + 'static, V: Fn(&[u8], String) -> bool + Send + Sync + 'static,

Available on crate feature csrf only.
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type Output = Result<Response<Body>, Error>

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impl<H, O, S, G, V> Handler<Request<Body>> for SessionMiddleware<H, S, G, V>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse, S: Storage + 'static, G: Fn() -> String + Send + Sync + 'static, V: Fn(&str) -> bool + Send + Sync + 'static,

Available on crate feature session only.
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type Output = Result<Response<Body>, Error>

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impl<H, O, T> Handler<Request<Body>> for TracingMiddleware<H, T>
where H: Handler<Request, Output = Result<O>>, O: IntoResponse, T: TracerProvider + Send + Sync + Clone + 'static, T::Tracer: Tracer + Send + Sync + 'static, <T::Tracer as Tracer>::Span: Span + Send + Sync + 'static,

Available on crate features params and otel and otel-tracing only.
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type Output = Result<Response<Body>, Error>

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impl<I, H, E, O> Handler<I> for FnExtHandler<H, E, O>
where I: Send + 'static, E: FromRequest + 'static, E::Error: IntoResponse, H: FnExt<I, E, Output = Result<O>>, O: 'static,

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type Output = <H as FnExt<I, E>>::Output

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impl<I, O> Handler<I> for BoxHandler<I, O>
where I: Send + 'static, O: 'static,

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type Output = O

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impl<I, O, S> Handler<Request<I>> for ServiceHandler<S>
where I: HttpBody + Send + 'static, O: HttpBody + Send + 'static, O::Data: Into<Bytes>, O::Error: Into<BoxError>, S: Service<Request<I>, Response = Response<O>> + Send + Sync + 'static, S::Future: Send, S::Error: Into<BoxError>,

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type Output = Result<Response<Body>, Error>

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impl<L, R, I, O> Handler<I> for Either<L, R>
where I: Send + 'static, L: Handler<I, Output = O>, R: Handler<I, Output = O>,

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type Output = O

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impl<T, H, O> Handler<Request<Body>> for State<(T, H)>
where T: Clone + Send + Sync + 'static, H: Handler<Request, Output = Result<O>>, O: IntoResponse,

Available on crate feature state only.
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type Output = Result<Response<Body>, Error>