rusthttp-headersresponse-headersrust-axum

How to set a response header in an axum handler?

I can't seem to find how to set a header for the response. I have looked for how to do this but haven't found a straightforward way.

With specific emphasis on the content-type header, how to set both a standard and custom headers from a response handler bearing in mind that I can already do thing.into_response()?

Solution

  • Here is an example how you can set a custom response header in your handler:

    use axum::http::HeaderMap;
use axum::response::IntoResponse;

async fn my_handler() -> impl IntoResponse {
    let mut headers = HeaderMap::new();
    headers.insert("x-my-hdr", "abc".parse().unwrap());
    (headers, "It works!")
}

    I've tested the above with both custom and standard headers (such as Content-Type) and it seems to work in both cases.