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use std::convert::Infallible;
use std::fs;
use std::future::Future;
use std::io::ErrorKind;
use std::net::SocketAddr;
use std::path::Path;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use hyper::service::{make_service_fn, service_fn};
use hyper::{Body, Error, Method, Request, Response, Server, StatusCode};
use tokio::sync::oneshot;
pub struct Keyserver {
url: String,
_handle: ShutdownHandle,
}
impl Keyserver {
pub fn start() -> Keyserver {
Keyserver::start_on_port(0)
}
pub fn start_on_port(port: u16) -> Keyserver {
let addr = ([127, 0, 0, 1], port).into();
let (bound_addr, server, shutdown_handle) = server(&addr);
tokio::spawn(async {
server
.await
.unwrap_or_else(|e| eprintln!("server error: {}", e))
});
let url = format!("http://localhost:{}/", bound_addr.port());
Keyserver {
url,
_handle: shutdown_handle,
}
}
pub fn url(&self) -> &str {
&self.url
}
pub async fn count(&self) -> String {
reqwest::get(&format!("{}count", self.url()))
.await
.unwrap()
.text()
.await
.unwrap()
}
}
pub fn server(
addr: &SocketAddr,
) -> (
SocketAddr,
impl Future<Output = Result<(), Error>>,
ShutdownHandle,
) {
let counter = Arc::new(AtomicUsize::new(0));
let new_service = make_service_fn(move |_socket| {
let counter = counter.clone();
async {
Ok::<_, Infallible>(service_fn(move |r| {
let counter = counter.clone();
async move { Ok::<_, Infallible>(service(r, &counter).await) }
}))
}
});
let (tx, rx) = oneshot::channel::<()>();
let server = Server::bind(addr).serve(new_service);
let local_addr = server.local_addr();
let server = server.with_graceful_shutdown(async {
rx.await.ok();
});
(local_addr, server, ShutdownHandle { tx: Some(tx) })
}
pub struct ShutdownHandle {
tx: Option<oneshot::Sender<()>>,
}
impl Drop for ShutdownHandle {
fn drop(&mut self) {
if let Some(sender) = self.tx.take() {
let _ = sender.send(());
}
}
}
const KEYS_PATH: &str = "support/keys/";
async fn service(request: Request<Body>, counter: &AtomicUsize) -> Response<Body> {
match (request.method(), request.uri().path()) {
(&Method::GET, "/count") => {
Response::new(Body::from(counter.load(Ordering::Relaxed).to_string()))
}
(&Method::GET, key_path) => {
let relative = Path::new(key_path).strip_prefix("/").unwrap();
match fs::read(&Path::new(KEYS_PATH).join(&relative)) {
Ok(content) => {
counter.fetch_add(1, Ordering::Relaxed);
Response::builder()
.header("Content-Type", "application/x-pem-file")
.body(Body::from(content))
.unwrap()
}
Err(e) => match e.kind() {
ErrorKind::NotFound => Response::builder()
.status(StatusCode::NOT_FOUND)
.body(Body::empty())
.unwrap(),
_ => {
eprintln!("Error reading file with path {:?}: {}", &key_path, e);
Response::builder()
.status(StatusCode::INTERNAL_SERVER_ERROR)
.body(Body::empty())
.unwrap()
}
},
}
}
_ => Response::builder()
.status(StatusCode::NOT_FOUND)
.body(Body::empty())
.unwrap(),
}
}