Function actix_web_lab::middleware::map_response
source · pub fn map_response<F>(mapper_fn: F) -> MapResMiddleware<F>
Expand description
Creates a middleware from an async function that is used as a mapping function for a
ServiceResponse
.
§Examples
Adds header:
use actix_web::{body::MessageBody, dev::ServiceResponse, http::header};
async fn add_header(
mut res: ServiceResponse<impl MessageBody>,
) -> actix_web::Result<ServiceResponse<impl MessageBody>> {
res.headers_mut()
.insert(header::WARNING, header::HeaderValue::from_static("42"));
Ok(res)
}
Maps body:
use actix_web::{body::MessageBody, dev::ServiceResponse};
async fn mutate_body_type(
res: ServiceResponse<impl MessageBody + 'static>,
) -> actix_web::Result<ServiceResponse<impl MessageBody>> {
Ok(res.map_into_left_body::<()>())
}