Module tower_http::cors

Available on crate feature cors only.

Expand description

Middleware which adds headers for CORS.

Example

use http::{Request, Response, Method, header};
use hyper::Body;
use tower::{ServiceBuilder, ServiceExt, Service};
use tower_http::cors::{Any, CorsLayer};
use std::convert::Infallible;

async fn handle(request: Request<Body>) -> Result<Response<Body>, Infallible> {
    Ok(Response::new(Body::empty()))
}

let cors = CorsLayer::new()
    // allow `GET` and `POST` when accessing the resource
    .allow_methods([Method::GET, Method::POST])
    // allow requests from any origin
    .allow_origin(Any);

let mut service = ServiceBuilder::new()
    .layer(cors)
    .service_fn(handle);

let request = Request::builder()
    .header(header::ORIGIN, "https://example.com")
    .body(Body::empty())
    .unwrap();

let response = service
    .ready()
    .await?
    .call(request)
    .await?;

assert_eq!(
    response.headers().get(header::ACCESS_CONTROL_ALLOW_ORIGIN).unwrap(),
    "*",
);