Axum expected the `Connection` header to be _exactly_ `upgrade`. Turns
out thats a bit too strict as this didn't work in Firefox.
Turns out `Connection` just has to contain `upgrade`. At least that is
what [warp does](https://github.com/seanmonstar/warp/blob/master/src/filters/ws.rs#L46).
Wrapping everything in `crate::body::Either` wasn't actually necessary
ans probably causes large body types. You can instead box the bodies in
the leaf services.
Basically a copy/paste of whats in warp.
Example usage:
```rust
use tower_web::{prelude::*, ws::{ws, WebSocket}};
let app = route("/ws", ws(handle_socket));
async fn handle_socket(mut socket: WebSocket) {
while let Some(msg) = socket.recv().await {
let msg = msg.unwrap();
socket.send(msg).await.unwrap();
}
}
```
Sunli