Provide example on how to use hyper 1.0.0 with tower layers

[o-agassizii]

Version
1.0.0-rc.3

Platform
Not relevant

Description
Can some of the examples for hyper 1.0.0 show how to make use of tower layers with hyper 1.0.0-rc.3?

All of the examples I can find online where people are using older versions of hyper with tower rely on the higher level Server API.

How do you use the lower level hyper 1.0.0 API like in https://hyper.rs/guides/1/server/hello-world/

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));

    // We create a TcpListener and bind it to 127.0.0.1:3000
    let listener = TcpListener::bind(addr).await?;

    // We start a loop to continuously accept incoming connections
    loop {
        let (stream, _) = listener.accept().await?;

        // Spawn a tokio task to serve multiple connections concurrently
        tokio::task::spawn(async move {
            // Finally, we bind the incoming connection to our `hello` service
            if let Err(err) = http1::Builder::new()
                // `service_fn` converts our function in a `Service`
                .serve_connection(stream, service_fn(hello))
                .await
            {
                println!("Error serving connection: {:?}", err);
            }
        });
    }
}

with tower layers?

[o-agassizii]

Anyone? @seanmonstar

[seanmonstar]

What have you tried so far? Where do you get stumped? The code you pasted is the hello world example.

[o-agassizii]

I tried a bunch of things, all too convoluted to meaningfully describe here.

This is why I request that a super basic example is provided showing how tower layers can be combined with the lower level hello world example.

[Wesley-Arizio]

@seanmonstar @o-agassizii
I have this repo with an example of an implementation of tower layer in hyper server https://github.com/Wesley-Arizio/hyper-tower, there is some stuff I need to improve but I think it's a good start.

if you guys find that is a good solution I can open a PR with this example or if you have suggestions I can implement them (or at least try to).

[NewbMiao]

Now hyper not relies on tower::service, so it's a bit annoying hard to reuse layer from tower::http. if other web framwork upgrade to latest hyper, would have same issue. right?
feel like it's a pity to get rid of tower service

[seanmonstar]

There's an adapter available in https://docs.rs/hyper-util/latest/hyper_util/service/struct.TowerToHyperService.html

There's also an item in #3411 to add a middleware section to the guides, if anyone would like to start that.

[NewbMiao]

Cool, @seanmonstar I've had a play with the TowerToHyperService.html and also raised a PR with examples for middleware docs.