Salvo Rust

use salvo::http::header::{self, HeaderValue};
use salvo::prelude::*;

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];

#[handler]
async fn pixel(res: &mut Response) {
    let headers = res.headers_mut();
    headers.insert(header::CONTENT_TYPE, HeaderValue::from_static("image/gif"));
    headers.insert(header::CACHE_CONTROL, HeaderValue::from_static("no-store"));
    res.write_body(GIF).ok();
}

#[tokio::main]
async fn main() {
    let router = Router::with_path("/pixel.gif").get(pixel);
    let acceptor = TcpListener::new("0.0.0.0:8080").bind().await;
    Server::new(acceptor).serve(router).await;
}