1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
#![deny(warnings)]
use std::sync::{
atomic::{AtomicUsize, Ordering},
Arc,
};
use fluxio::service::{make_service_fn, service_fn};
use fluxio::{Body, Error, Response, Server};
#[tokio::main]
async fn main() {
pretty_env_logger::init();
let addr = ([127, 0, 0, 1], 3000).into();
// For the most basic of state, we just share a counter, that increments
// with each request, and we send its value back in the response.
let counter = Arc::new(AtomicUsize::new(0));
// The closure inside `make_service_fn` is run for each connection,
// creating a 'service' to handle requests for that specific connection.
let make_service = make_service_fn(move |_| {
// While the state was moved into the make_service closure,
// we need to clone it here because this closure is called
// once for every connection.
//
// Each connection could send multiple requests, so
// the `Service` needs a clone to handle later requests.
let counter = counter.clone();
async move {
// This is the `Service` that will handle the connection.
// `service_fn` is a helper to convert a function that
// returns a Response into a `Service`.
Ok::<_, Error>(service_fn(move |_req| {
// Get the current count, and also increment by 1, in a single
// atomic operation.
let count = counter.fetch_add(1, Ordering::AcqRel);
async move { Ok::<_, Error>(Response::new(Body::from(format!("Request #{}", count)))) }
}))
}
});
let server = Server::bind(&addr).serve(make_service);
println!("Listening on http://{}", addr);
if let Err(e) = server.await {
eprintln!("server error: {}", e);
}
}