Function warp::filters::reply::default_header

source · 
pub fn default_header<K, V>(name: K, value: V) -> WithDefaultHeader
where
    HeaderName: TryFrom<K>,
    <HeaderName as TryFrom<K>>::Error: Into<Error>,
    HeaderValue: TryFrom<V>,
    <HeaderValue as TryFrom<V>>::Error: Into<Error>,
Expand description

Wrap a Filter that adds a header to the reply, if they aren’t already set.

§Note

This only adds a header if the underlying filter is successful, and returns a Reply If the underlying filter was rejected, the header is not added.

§Example

use warp::Filter;

// Set `server: warp` if not already set.
let route = warp::any()
    .map(warp::reply)
    .with(warp::reply::with::default_header("server", "warp"));