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".

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,