56 lines
1.6 KiB
Rust
56 lines
1.6 KiB
Rust
#![feature(async_await)]
|
|
#![deny(warnings)]
|
|
|
|
use std::cell::Cell;
|
|
use std::rc::Rc;
|
|
|
|
use hyper::{Body, Error, Response, Server};
|
|
use hyper::service::{make_service_fn, service_fn};
|
|
use tokio::runtime::current_thread;
|
|
|
|
// Configure a runtime that runs everything on the current thread,
|
|
// which means it can spawn !Send futures...
|
|
#[tokio::main(single_thread)]
|
|
async fn main() {
|
|
pretty_env_logger::init();
|
|
|
|
let addr = ([127, 0, 0, 1], 3000).into();
|
|
|
|
// Using a !Send request counter is fine on 1 thread...
|
|
let counter = Rc::new(Cell::new(0));
|
|
|
|
let make_service = make_service_fn(move |_| {
|
|
// For each connection, clone the counter to use in our service...
|
|
let cnt = counter.clone();
|
|
|
|
async move {
|
|
Ok::<_, Error>(service_fn(move |_| {
|
|
let prev = cnt.get();
|
|
cnt.set(prev + 1);
|
|
let value = cnt.get();
|
|
async move {
|
|
Ok::<_, Error>(Response::new(Body::from(
|
|
format!("Request #{}", value)
|
|
)))
|
|
}
|
|
}))
|
|
}
|
|
});
|
|
|
|
// Since the Server needs to spawn some background tasks, we needed
|
|
// to configure an Executor that can spawn !Send futures...
|
|
let exec = current_thread::TaskExecutor::current();
|
|
|
|
let server = Server::bind(&addr)
|
|
.executor(exec)
|
|
.serve(make_service);
|
|
|
|
println!("Listening on http://{}", addr);
|
|
|
|
// The server would block on current thread to await !Send futures.
|
|
if let Err(e) = server.await {
|
|
eprintln!("server error: {}", e);
|
|
}
|
|
}
|
|
|