main.rs

// - Doing a GET request
let resp404 = client.get("https://httpbin.org/status/404")
    .send()
    .await?;

// - Matching the HTTP status code of the request
match resp404.status() {
    // - "OK - 200" everything was good
    reqwest::StatusCode::OK => {
        println!("Success!");
        // ...
    },
    // - "NOT_FOUND - 404" the resource wasn't found
    reqwest::StatusCode::NOT_FOUND => {
        println!("Got 404! Haven't found resource!");
        // Output: 
        /*
        Got 404! Haven't found resource!
        */
    },
    // - Every other status code which doesn't match the above ones
    _ => {
        panic!("Okay... this shouldn't happen...");
    },
};