tiles_proxy/
http_headers.rs

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//! Additional HTTP headers for browser cache management.

use rocket::fairing::{Fairing, Info, Kind};
use rocket::http::Header;
use rocket::{Request, Response};

/// The `Cache-Control` HTTP header field holds directives (instructions) — in both requests and responses — that control caching in browsers and shared caches (e.g. Proxies, CDNs).
///
/// See <https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control>
pub struct CacheControl;

#[rocket::async_trait]
impl Fairing for CacheControl {
    fn info(&self) -> Info {
        Info {
            name: "Add Cache-Control header to responses",
            kind: Kind::Response,
        }
    }

    async fn on_response<'r>(&self, _request: &'r Request<'_>, response: &mut Response<'r>) {
        // 2592000 = 30 * 24 * 60 * 60
        response.set_header(Header::new(
            "Cache-Control",
            "public, max-age=2592000, immutable",
        ));
    }
}

/// Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.
///
/// See <https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS>
pub struct Cors;

#[rocket::async_trait]
impl Fairing for Cors {
    fn info(&self) -> Info {
        Info {
            name: "Add CORS headers to responses",
            kind: Kind::Response,
        }
    }

    async fn on_response<'r>(&self, _request: &'r Request<'_>, response: &mut Response<'r>) {
        response.set_header(Header::new("Access-Control-Allow-Origin", "*"));
        response.set_header(Header::new(
            "Access-Control-Allow-Methods",
            "POST, GET, PATCH, OPTIONS",
        ));
        response.set_header(Header::new("Access-Control-Allow-Headers", "*"));
        response.set_header(Header::new("Access-Control-Allow-Credentials", "true"));
    }
}
tiles_proxy/http_headers.rs

tiles_proxy/
http_headers.rs
