third_party/rust/warp/examples/headers.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

#![deny(warnings)]
use std::net::SocketAddr;
use warp::Filter;

/// Create a server that requires header conditions:
///
/// - `Host` is a `SocketAddr`
/// - `Accept` is exactly `*/*`
///
/// If these conditions don't match, a 404 is returned.
#[tokio::main]
async fn main() {
    pretty_env_logger::init();

    // For this example, we assume no DNS was used,
    // so the Host header should be an address.
    let host = warp::header::<SocketAddr>("host");

    // Match when we get `accept: */*` exactly.
    let accept_stars = warp::header::exact("accept", "*/*");

    let routes = host
        .and(accept_stars)
        .map(|addr| format!("accepting stars on {}", addr));

    warp::serve(routes).run(([127, 0, 0, 1], 3030)).await;
}