Rocket Rust

#[macro_use]
extern crate rocket;

use rocket::http::Header;

const GIF: &[u8] = &[0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x01, 0x00, 0x01, 0x00, 0x80, 0x00, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x21, 0xf9, 0x04, 0x01, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, 0x02, 0x44, 0x01, 0x00, 0x3b];

#[derive(Responder)]
#[response(content_type = "image/gif")]
struct Pixel(&'static [u8], Header<'static>);

#[get("/pixel.gif")]
fn pixel() -> Pixel {
    Pixel(GIF, Header::new("Cache-Control", "no-store"))
}

#[launch]
fn rocket() -> _ {
    let config = rocket::Config::figment().merge(("port", 8080));
    rocket::custom(config).mount("/", routes![pixel])
}