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|
mod ws;
use crate::prelude::*;
use gotham::router::builder::{DefineSingleRoute as _, DrawRoutes as _};
use gotham::state::FromState as _;
use lazy_static::lazy_static;
use lazy_static_include::*;
lazy_static_include::lazy_static_include_bytes!(
INDEX_HTML,
"static/index.html"
);
lazy_static_include::lazy_static_include_bytes!(
TELETERM_WEB_JS,
"static/teleterm_web.js"
);
lazy_static_include::lazy_static_include_bytes!(
TELETERM_WEB_WASM,
"static/teleterm_web_bg.wasm"
);
pub struct Server {
server: Box<dyn futures::Future<Item = (), Error = ()> + Send>,
}
impl Server {
pub fn new<T: std::net::ToSocketAddrs + 'static>(addr: T) -> Self {
Self {
server: Box::new(gotham::init_server(addr, router())),
}
}
}
impl Server {
const POLL_FNS:
&'static [&'static dyn for<'a> Fn(
&'a mut Self,
)
-> component_future::Poll<
(),
Error,
>] = &[&Self::poll_web_server];
fn poll_web_server(&mut self) -> component_future::Poll<(), Error> {
component_future::try_ready!(self
.server
.poll()
.map_err(|_| unreachable!()));
Ok(component_future::Async::Ready(()))
}
}
impl futures::Future for Server {
type Item = ();
type Error = Error;
fn poll(&mut self) -> futures::Poll<Self::Item, Self::Error> {
component_future::poll_future(self, Self::POLL_FNS)
}
}
pub fn router() -> impl gotham::handler::NewHandler {
gotham::router::builder::build_simple_router(|route| {
route.get("/").to(serve_static("text/html", &INDEX_HTML));
route
.get("/teleterm_web.js")
.to(serve_static("application/javascript", &TELETERM_WEB_JS));
route
.get("/teleterm_web_bg.wasm")
.to(serve_static("application/wasm", &TELETERM_WEB_WASM));
route.get("/ws").to(handle_websocket_connection);
})
}
fn serve_static(
content_type: &'static str,
s: &'static [u8],
) -> impl gotham::handler::Handler + Copy {
move |state| {
let response = hyper::Response::builder()
.header("Content-Type", content_type)
.body(hyper::Body::from(s))
.unwrap();
(state, response)
}
}
fn handle_websocket_connection(
mut state: gotham::state::State,
) -> (gotham::state::State, hyper::Response<hyper::Body>) {
let body = hyper::Body::take_from(&mut state);
let headers = hyper::HeaderMap::take_from(&mut state);
if ws::requested(&headers) {
let (response, stream) = match ws::accept(&headers, body) {
Ok(res) => res,
Err(_) => {
log::error!("failed to accept websocket request");
return (
state,
hyper::Response::builder()
.status(hyper::StatusCode::BAD_REQUEST)
.body(hyper::Body::empty())
.unwrap(),
);
}
};
let req_id = gotham::state::request_id(&state).to_owned();
let stream = stream
.map_err(|e| {
log::error!(
"error upgrading connection for websockets: {}",
e
)
})
.and_then(move |stream| handle_websocket_stream(req_id, stream));
tokio::spawn(stream);
(state, response)
} else {
(
state,
hyper::Response::new(hyper::Body::from(
"non-websocket request to websocket endpoint",
)),
)
}
}
fn handle_websocket_stream<S>(
req_id: String,
stream: S,
) -> impl futures::Future<Item = (), Error = ()>
where
S: futures::Stream<
Item = tokio_tungstenite::tungstenite::protocol::Message,
Error = tokio_tungstenite::tungstenite::Error,
> + futures::Sink<
SinkItem = tokio_tungstenite::tungstenite::protocol::Message,
SinkError = tokio_tungstenite::tungstenite::Error,
>,
{
let (sink, stream) = stream.split();
sink.send_all(stream.map(move |msg| {
handle_websocket_message(&req_id, &msg);
msg
}))
.map_err(|e| log::error!("error during websocket stream: {}", e))
.map(|_| log::info!("disconnect"))
}
fn handle_websocket_message(
req_id: &str,
msg: &tokio_tungstenite::tungstenite::protocol::Message,
) {
// TODO
log::info!("websocket stream message for {}: {:?}", req_id, msg);
}
|
