Trait MakeHeaderValue

pub trait MakeHeaderValue<T> {
    // Required method
    fn make_header_value(&mut self, message: &T) -> Option<HeaderValue>;
}

Available on crate feature set-header only.

Trait for producing header values.

Used by SetRequestHeader and SetResponseHeader.

This trait is implemented for closures with the correct type signature. Typically users will not have to implement this trait for their own types.

It is also implemented directly for HeaderValue. When a fixed header value should be added to all responses, it can be supplied directly to the middleware.

Required Methods

fn make_header_value(&mut self, message: &T) -> Option<HeaderValue>

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

Implementations on Foreign Types

impl<T> MakeHeaderValue<T> for Option<HeaderValue>

fn make_header_value(&mut self, _message: &T) -> Option<HeaderValue>

impl<T> MakeHeaderValue<T> for HeaderValue

fn make_header_value(&mut self, _message: &T) -> Option<HeaderValue>

Implementors

impl<F, T> MakeHeaderValue<T> for F

where F: FnMut(&T) -> Option<HeaderValue>,