use std::{collections::HashMap, net::SocketAddr, pin::Pin, sync::Arc, time::Duration};
use bytes::Bytes;
use http_body_util::{BodyExt, Full, Limited};
use hyper::{server::conn::http1, service::service_fn};
use hyper_util::rt::TokioIo;
use tokio::{net::TcpListener, signal};
use tracing::{error, info, warn};
pub mod error;
pub mod extractor;
pub mod middleware;
pub mod openapi;
pub mod response;
pub mod router;
pub use error::{Error, Result};
pub use extractor::{FromRequest, Json, Path, Request, State};
pub use middleware::{FnMiddleware, Middleware, Next};
pub use response::{IntoResponse, Response};
pub use router::Router;
pub use ferox_macros::{delete, get, post, put};
pub struct StaticRoute {
pub method: &'static str,
pub path: &'static str,
pub handler: fn(Request) -> Pin<Box<dyn std::future::Future<Output = Response> + Send>>,
}
#[linkme::distributed_slice]
pub static ROUTES: [StaticRoute];
pub struct Config {
pub body_limit: u64,
pub request_timeout: Duration,
pub cors_origin: Option<String>,
}
impl Default for Config {
fn default() -> Self {
Self {
body_limit: 1024 * 1024,
request_timeout: Duration::from_secs(30),
cors_origin: None,
}
}
}
pub struct App {
router: Router,
middlewares: Vec<Arc<dyn Middleware>>,
state: Option<Arc<dyn std::any::Any + Send + Sync>>,
openapi: openapi::OpenApi,
config: Config,
}
impl App {
pub fn new() -> Self {
Self {
router: Router::new(),
middlewares: vec![],
state: None,
openapi: openapi::OpenApi::new("GlideAPI", "0.1.0"),
config: Config::default(),
}
}
pub fn config(mut self, cfg: Config) -> Self { self.config = cfg; self }
pub fn state<T: Clone + Send + Sync + 'static>(mut self, val: T) -> Self {
self.state = Some(Arc::new(val));
self
}
pub fn route<F, Fut>(mut self, method: &str, path: &str, handler: F) -> Self
where
F: Fn(Request) -> Fut + Send + Sync + 'static,
Fut: std::future::Future<Output = Response> + Send + 'static,
{
self.openapi.add_route(method, path, &format!("{method} {path}"));
self.router.add(method, path, handler);
self
}
pub fn mount_routes(mut self) -> Self {
for r in ROUTES {
self.openapi.add_route(r.method, r.path, &format!("{} {}", r.method, r.path));
let handler = r.handler;
self.router.add(r.method, r.path, move |req| handler(req));
}
self
}
pub fn with<M: Middleware>(mut self, m: M) -> Self {
self.middlewares.push(Arc::new(m));
self
}
pub fn init_tracing() {
tracing_subscriber::fmt()
.with_env_filter(
tracing_subscriber::EnvFilter::try_from_default_env()
.unwrap_or_else(|_| "ferox=info".into()),
)
.init();
}
pub async fn listen(self, addr: &str) {
let addr: SocketAddr = addr.parse().expect("invalid address");
let listener = TcpListener::bind(addr).await.expect("bind failed");
info!("🚀 GlideAPI listening on http://{addr}");
info!("📖 OpenAPI http://{addr}/_openapi.json");
info!("🖥️ Swagger http://{addr}/_docs");
let router = Arc::new(self.router);
let mws = Arc::new(self.middlewares);
let state = Arc::new(self.state);
let openapi = Arc::new(serde_json::to_string_pretty(&self.openapi).unwrap());
let cfg = Arc::new(self.config);
loop {
tokio::select! {
Ok((stream, peer)) = listener.accept() => {
let router = router.clone();
let mws = mws.clone();
let state = state.clone();
let openapi = openapi.clone();
let cfg = cfg.clone();
tokio::spawn(async move {
let io = TokioIo::new(stream);
let svc = service_fn(move |req: hyper::Request<hyper::body::Incoming>| {
let router = router.clone();
let mws = mws.clone();
let state = state.clone();
let openapi = openapi.clone();
let cfg = cfg.clone();
let peer = peer;
async move {
let method = req.method().to_string();
let path = req.uri().path().to_string();
let req_id = uuid::Uuid::new_v4().to_string();
if method == "GET" && path == "/_openapi.json" {
return Ok::<_, hyper::Error>(json_resp(200, openapi.as_ref().clone(), None));
}
if method == "GET" && path == "/_docs" {
return Ok(html_resp(swagger_ui()));
}
let mut headers = HashMap::new();
for (k, v) in req.headers() {
headers.insert(k.to_string(), v.to_str().unwrap_or("").to_string());
}
let body = match Limited::new(req.into_body(), cfg.body_limit as usize)
.collect()
.await
{
Ok(b) => b.to_bytes(),
Err(_) => {
warn!(req_id, "body too large from {peer}");
return Ok(json_resp(413, r#"{"error":"payload too large"}"#.into(), Some(&req_id)));
}
};
let fw_req = Request {
method: method.clone(),
path: path.clone(),
headers,
body,
params: HashMap::new(),
state: state.as_ref().clone(),
req_id: req_id.clone(),
};
let base: Next = Arc::new(move |r| {
let router = router.clone();
Box::pin(async move { router.handle(r).await })
});
let chain = mws.iter().rev().fold(base, |next, mw| {
let mw = mw.clone();
Arc::new(move |req| mw.handle(req, next.clone()))
});
let resp = match tokio::time::timeout(cfg.request_timeout, chain(fw_req)).await {
Ok(r) => r,
Err(_) => {
warn!(req_id, "{method} {path} timed out");
Response { status: 504, body: r#"{"error":"gateway timeout"}"#.into() }
}
};
info!(req_id, peer = %peer, "{method} {path} → {}", resp.status);
Ok(json_resp(resp.status, resp.body, Some(&req_id)))
}
});
if let Err(e) = http1::Builder::new().serve_connection(io, svc).await {
error!("connection error: {e}");
}
});
}
_ = shutdown_signal() => {
info!("shutting down gracefully");
break;
}
}
}
}
}
impl Default for App {
fn default() -> Self { Self::new() }
}
fn json_resp(status: u16, body: String, req_id: Option<&str>) -> hyper::Response<Full<Bytes>> {
let mut b = hyper::Response::builder()
.status(status)
.header("content-type", "application/json");
if let Some(id) = req_id {
b = b.header("x-request-id", id);
}
b.body(Full::new(Bytes::from(body))).unwrap()
}
fn html_resp(body: &'static str) -> hyper::Response<Full<Bytes>> {
hyper::Response::builder()
.status(200)
.header("content-type", "text/html")
.body(Full::new(Bytes::from_static(body.as_bytes())))
.unwrap()
}
fn swagger_ui() -> &'static str {
r###"<!DOCTYPE html>
<html>
<head>
<title>GlideAPI Docs</title>
<meta charset="utf-8"/>
<link rel="stylesheet" href="https://unpkg.com/swagger-ui-dist/swagger-ui.css"/>
</head>
<body>
<div id="swagger-ui"></div>
<script src="https://unpkg.com/swagger-ui-dist/swagger-ui-bundle.js"></script>
<script>
SwaggerUIBundle({ url: "/_openapi.json", dom_id: "#swagger-ui" })
</script>
</body>
</html>"###
}
async fn shutdown_signal() {
let ctrl_c = async { signal::ctrl_c().await.expect("ctrl-c handler failed") };
#[cfg(unix)]
let terminate = async {
signal::unix::signal(signal::unix::SignalKind::terminate())
.expect("SIGTERM handler failed")
.recv()
.await;
};
#[cfg(not(unix))]
let terminate = std::future::pending::<()>();
tokio::select! {
_ = ctrl_c => {},
_ = terminate => {},
}
}