ClientBuilder resolve but for all subdomains

[sathyajithps]

I have a sample code here that tries to resolve all calls to example.com to a local address. Unfortunately, its not working at all.

let mut client = ClientBuilder::new();
    client = client.resolve(
        "example.com",
        SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 8000),
    );

    let res = client
        .build()
        .unwrap()
        .request(Method::GET, "http://op.example.com")
        .send();

    println!("{:?}", res);

I'm getting the following error:

Err(reqwest::Error { kind: Request, url: Url { scheme: "http", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("op.example.com")), port: None, path: "/", query: None, fragment: None }, source: hyper::Error(Connect, ConnectError("dns error", Custom { kind: Uncategorized, error: "failed to lookup address information: Name or service not known" })) })

I'm trying to write a library where I let the users override the http calls to local domain and port. Most of the requests will use subdomains instead of the root domain. How do I resolve them to custom socket address?

[seanmonstar]

You could use the ClientBuilder::dns_resolver method to specify a resolver that can handle all subdomains.

[sathyajithps]

I'll try it out. Could you perhaps point me to a working sample of how to use it ? I did not find much in docs.rs.