Trait MakeHeaderValueFn 

pub trait MakeHeaderValueFn<B, A>:
    Send
    + Sync
    + 'static {
    // Required method
    fn call(
        &self,
        req: Request<B>,
    ) -> impl Future<Output = (Request<B>, Option<HeaderValue>)> + Send;
}

Functional version of MakeHeaderValue.

Required Methods

fn call( &self, req: Request<B>, ) -> impl Future<Output = (Request<B>, Option<HeaderValue>)> + Send

Try to create a header value from the request or response.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<F, Fut, B> MakeHeaderValueFn<B, ((), B)> for F

where B: Send + 'static, F: Fn(Request<B>) -> Fut + Send + Sync + 'static, Fut: Future<Output = (Request<B>, Option<HeaderValue>)> + Send + 'static,

impl<F, Fut, B> MakeHeaderValueFn<B, ()> for F

where B: Send + 'static, F: Fn() -> Fut + Send + Sync + 'static, Fut: Future<Output = Option<HeaderValue>> + Send + 'static,