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@@ -0,0 +1,163 @@
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+use crate::extra_info::ExtraInfo;
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+
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+use hyper::{
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+ body::{self, Bytes},
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+ header::HeaderValue,
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+ server::conn::AddrStream,
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+ service::{make_service_fn, service_fn},
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+ Body, Method, Request, Response, Server,
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+};
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+use serde_json::json;
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+use std::{collections::HashSet, convert::Infallible, net::SocketAddr, time::Duration};
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+use tokio::{
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+ spawn,
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+ sync::{broadcast, mpsc, oneshot},
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+ time::sleep,
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+};
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+
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+async fn serve_extra_infos(
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+ extra_infos_pages: &mut Vec<String>,
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+ req: Request<Body>,
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+) -> Result<Response<Body>, Infallible> {
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+ match req.method() {
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+ &Method::OPTIONS => Ok(Response::builder()
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+ .header("Access-Control-Allow-Origin", HeaderValue::from_static("*"))
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+ .header("Access-Control-Allow-Headers", "accept, content-type")
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+ .header("Access-Control-Allow-Methods", "POST")
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+ .status(200)
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+ .body(Body::from("Allow POST"))
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+ .unwrap()),
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+ _ => match req.uri().path() {
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+ "/" => Ok::<_, Infallible>(serve_index(&extra_infos_pages)),
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+ "/add" => Ok::<_, Infallible>({
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+ let bytes = body::to_bytes(req.into_body()).await.unwrap();
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+ add_extra_infos(extra_infos_pages, bytes)
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+ }),
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+ path => Ok::<_, Infallible>({
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+ // Serve the requested file
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+ serve_extra_infos_file(&extra_infos_pages, path)
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+ }),
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+ },
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+ }
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+}
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+
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+pub async fn server() {
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+ let (context_tx, context_rx) = mpsc::channel(32);
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+ let request_tx = context_tx.clone();
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+ let shutdown_cmd_tx = context_tx.clone();
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+ let (shutdown_tx, mut shutdown_rx) = broadcast::channel(16);
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+ let kill_context = shutdown_tx.subscribe();
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+
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+ let context_manager =
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+ spawn(async move { create_context_manager(context_rx, kill_context).await });
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+
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+ let addr = SocketAddr::from(([127, 0, 0, 1], 8004));
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+ let make_svc = make_service_fn(move |_conn: &AddrStream| {
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+ let request_tx = request_tx.clone();
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+ let service = service_fn(move |req| {
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+ let request_tx = request_tx.clone();
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+ let (response_tx, response_rx) = oneshot::channel();
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+ let cmd = Command::Request {
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+ req,
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+ sender: response_tx,
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+ };
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+ async move {
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+ request_tx.send(cmd).await.unwrap();
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+ response_rx.await.unwrap()
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+ }
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+ });
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+ async move { Ok::<_, Infallible>(service) }
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+ });
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+ let server = Server::bind(&addr).serve(make_svc);
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+ println!("Listening on localhost:8004");
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+ if let Err(e) = server.await {
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+ eprintln!("server error: {}", e);
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+ }
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+}
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+
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+async fn create_context_manager(
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+ context_rx: mpsc::Receiver<Command>,
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+ mut kill: broadcast::Receiver<()>,
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+) {
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+ tokio::select! {
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+ create_context = context_manager(context_rx) => create_context,
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+ _ = kill.recv() => {println!("Shut down context_manager");},
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+ }
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+}
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+
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+async fn context_manager(mut context_rx: mpsc::Receiver<Command>) {
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+ let mut extra_infos_pages = Vec::<String>::new();
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+
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+ while let Some(cmd) = context_rx.recv().await {
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+ use Command::*;
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+ match cmd {
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+ Request { req, sender } => {
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+ let response = serve_extra_infos(&mut extra_infos_pages, req).await;
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+ if let Err(e) = sender.send(response) {
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+ eprintln!("Server Response Error: {:?}", e);
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+ }
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+ sleep(Duration::from_millis(1)).await;
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+ }
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+ Shutdown { shutdown_sig } => {
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+ drop(shutdown_sig);
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+ }
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+ }
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+ }
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+}
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+
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+#[derive(Debug)]
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+enum Command {
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+ Request {
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+ req: Request<Body>,
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+ sender: oneshot::Sender<Result<Response<Body>, Infallible>>,
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+ },
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+ Shutdown {
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+ shutdown_sig: broadcast::Sender<()>,
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+ },
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+}
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+
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+fn add_extra_infos(extra_infos_pages: &mut Vec<String>, request: Bytes) -> Response<Body> {
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+ let extra_infos: HashSet<ExtraInfo> = match serde_json::from_slice(&request) {
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+ Ok(req) => req,
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+ Err(e) => {
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+ let response = json!({"error": e.to_string()});
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+ let val = serde_json::to_string(&response).unwrap();
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+ return prepare_header(val);
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+ }
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+ };
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+
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+ let mut extra_infos_file = String::new();
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+ for extra_info in extra_infos {
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+ extra_infos_file.push_str(extra_info.to_string().as_str());
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+ }
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+ extra_infos_pages.push(extra_infos_file);
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+ prepare_header("OK".to_string())
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+}
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+
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+fn serve_index(extra_infos_pages: &Vec<String>) -> Response<Body> {
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+ let mut body_str = String::new();
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+ for i in 0..extra_infos_pages.len() {
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+ body_str
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+ .push_str(format!("<a href=\"{}-extra-infos\">{}-extra-infos</a>\n", i, i).as_str());
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+ }
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+ prepare_header(body_str)
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+}
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+
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+fn serve_extra_infos_file(extra_infos_pages: &Vec<String>, path: &str) -> Response<Body> {
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+ if path.ends_with("-extra-infos") {
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+ if let Ok(index) = &path[1..(path.len() - "-extra-infos".len())].parse::<usize>() {
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+ if extra_infos_pages.len() > *index {
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+ return prepare_header(extra_infos_pages[*index].clone());
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+ }
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+ }
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+ }
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+ prepare_header("Not a valid file".to_string())
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+}
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+
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+// Prepare HTTP Response for successful Server Request
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+fn prepare_header(response: String) -> Response<Body> {
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+ let mut resp = Response::new(Body::from(response));
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+ resp.headers_mut()
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+ .insert("Access-Control-Allow-Origin", HeaderValue::from_static("*"));
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+ resp
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+}
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