Struct axum::response::AppendHeaders

pub struct AppendHeaders<K, V, const N: usize>(pub [(K, V); N]);

Append headers to a response.

Returning something like [("content-type", "foo=bar")] from a handler will override any existing content-type headers. If instead you want to append headers, use AppendHeaders:

use axum::{
    response::{AppendHeaders, IntoResponse},
    http::header::SET_COOKIE,
};

async fn handler() -> impl IntoResponse {
    // something that sets the `set-cookie` header
    let set_some_cookies = /* ... */

    (
        set_some_cookies,
        // append two `set-cookie` headers to the response
        // without overriding the ones added by `set_some_cookies`
        AppendHeaders([
            (SET_COOKIE, "foo=bar"),
            (SET_COOKIE, "baz=qux"),
        ])
    )
}

Tuple Fields

0: [(K, V); N]

Trait Implementations

impl<K, V, const N: usize> Debug for AppendHeaders<K, V, N> where
    K: Debug,
    V: Debug, 

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<K, V, const N: usize> IntoResponse for AppendHeaders<K, V, N> where
    K: TryInto<HeaderName>,
    V: TryInto<HeaderValue>,
    <K as TryInto<HeaderName>>::Error: Display,
    <V as TryInto<HeaderValue>>::Error: Display, 

fn into_response(self) -> Response<UnsyncBoxBody<Bytes, Error>>

Create a response.

impl<K, V, const N: usize> IntoResponseParts for AppendHeaders<K, V, N> where
    K: TryInto<HeaderName>,
    V: TryInto<HeaderValue>,
    <K as TryInto<HeaderName>>::Error: Display,
    <V as TryInto<HeaderValue>>::Error: Display, 

type Error = TryIntoHeaderError<<K as TryInto<HeaderName>>::Error, <V as TryInto<HeaderValue>>::Error>

The type returned in the event of an error.

fn into_response_parts(
    self,
    res: ResponseParts
) -> Result<ResponseParts, <AppendHeaders<K, V, N> as IntoResponseParts>::Error>

Set parts of the response