How to get user public IP address

[blueowlgreenfish]

I checked discussion Get the client ip from a Request #968 .
I tried an example for into_make_service_with_connect_info.

use axum::{
    extract::ConnectInfo,
    routing::get,
    Router,
};
use std::net::SocketAddr;

let app = Router::new().route("/", get(handler));

async fn handler(ConnectInfo(addr): ConnectInfo<SocketAddr>) -> String {
    // I changed the example code from addr to addr.ip() to get IP address
    format!("Hello {}", addr.ip())
}

axum::Server::bind(&"0.0.0.0:3000".parse().unwrap())
    .serve(
        app.into_make_service_with_connect_info::<SocketAddr>()
    )
    .await
    .expect("server failed");

This returns Hello 127.0.0.1.
It only returns local address and not a public IP address.
How can I return a public IP address?

[davidpdrsn]

Are you using a reverse proxy? If so you need to check the headers it sets.

[blueowlgreenfish]

I don't know if this helps but using public-ip returns a public IP address.
But I want to do this using only axum.

[davidpdrsn]

Well if you're making requests locally, to a server running locally, your IP will be 127.0.0.1

[blueowlgreenfish]

hmm...
If I use public-ip crate it returns my public IP address and not 127.0.0.1 even though I made the request locally.

[blueowlgreenfish]

I tested into_make_service_with_connect_info on my live web site.
This time, it returned Hello 10.0.0.2, which is not my public IP address.

[davidpdrsn]

ConnectInfo<SocketAddr> returns the remote_addr of the AddrStream.

From the docs:

This enables extracting things like the client’s remote address.

It doesn't return your public IP. You'll have to get that with something like https://github.com/avitex/rust-public-ip

[matthiasg]

I would like to have the client's remote address AND the targeted address (the one where axum runs on). There is a difference for me whether the caller called 127.0.0.1 or the public ip. Is that possible ?

[jplatte]

Yes, that is possible. It's a bit hidden in the documentation, but you have to implement Connected<IncomingStream<'_>> for a custom type that gets both the local and remote address from the IncomingStream, then use that with ConnectInfo / into_make_service_with_connect_info.