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//! Server-side WebSocket upgrade tests for `http.serve` and the
//! `assay.shell.bridge` integration on top of it.
//!
//! These cover the full stack: hyper upgrade handshake, `WsServerConn`
//! UserData methods (read/write/close), the `process.spawn_pty` PTY plumbing,
//! and the resize control protocol in `assay.shell`.
mod common;
use common::create_vm;
use futures_util::{SinkExt, StreamExt};
use mlua::Lua;
use std::time::Duration;
use tokio_tungstenite::tungstenite::Message;
async fn wait_for_port(lua: &Lua) -> u16 {
for _ in 0..200 {
tokio::time::sleep(Duration::from_millis(10)).await;
if let Ok(p) = lua.globals().get::<u16>("_SERVER_PORT")
&& p > 0
{
return p;
}
}
panic!("server didn't bind within 2s");
}
fn run<F>(body: F)
where
F: std::future::Future<Output = ()> + 'static,
{
let rt = tokio::runtime::Builder::new_current_thread()
.enable_all()
.build()
.unwrap();
let local = tokio::task::LocalSet::new();
local.block_on(&rt, body);
}
#[test]
fn ws_text_echo() {
run(async {
let lua = create_vm();
let lua_for_serve = lua.clone();
tokio::task::spawn_local(async move {
lua_for_serve
.load(
r#"
http.serve(0, {
GET = {
["/echo"] = function(req)
return { ws = function(conn)
while true do
local m = conn:read()
if not m then break end
conn:write(m)
end
end }
end,
},
})
"#,
)
.exec_async()
.await
.ok();
});
let port = wait_for_port(&lua).await;
let url = format!("ws://127.0.0.1:{port}/echo");
let (mut ws, _resp) = tokio_tungstenite::connect_async(&url).await.unwrap();
ws.send(Message::Text("hello".into())).await.unwrap();
let got = ws.next().await.unwrap().unwrap();
match got {
Message::Text(t) => assert_eq!(t.as_str(), "hello"),
other => panic!("expected text frame, got {other:?}"),
}
ws.close(None).await.ok();
});
}
#[test]
fn ws_binary_echo() {
run(async {
let lua = create_vm();
let lua_for_serve = lua.clone();
tokio::task::spawn_local(async move {
lua_for_serve
.load(
r#"
http.serve(0, {
GET = {
["/echo"] = function(req)
return { ws = function(conn)
local m = conn:read()
if m then conn:write(m, { binary = true }) end
end }
end,
},
})
"#,
)
.exec_async()
.await
.ok();
});
let port = wait_for_port(&lua).await;
let url = format!("ws://127.0.0.1:{port}/echo");
let (mut ws, _resp) = tokio_tungstenite::connect_async(&url).await.unwrap();
let payload: Vec<u8> = vec![0xde, 0xad, 0xbe, 0xef, 0x00, 0xff];
ws.send(Message::Binary(payload.clone().into()))
.await
.unwrap();
let got = ws.next().await.unwrap().unwrap();
match got {
Message::Binary(b) => assert_eq!(b.as_ref(), payload.as_slice()),
other => panic!("expected binary frame, got {other:?}"),
}
ws.close(None).await.ok();
});
}
#[test]
fn ws_server_initiated_close() {
run(async {
let lua = create_vm();
let lua_for_serve = lua.clone();
tokio::task::spawn_local(async move {
lua_for_serve
.load(
r#"
http.serve(0, {
GET = {
["/bye"] = function(req)
return { ws = function(conn)
conn:write("greeting")
conn:close(1000, "bye")
end }
end,
},
})
"#,
)
.exec_async()
.await
.ok();
});
let port = wait_for_port(&lua).await;
let url = format!("ws://127.0.0.1:{port}/bye");
let (mut ws, _resp) = tokio_tungstenite::connect_async(&url).await.unwrap();
let greet = ws.next().await.unwrap().unwrap();
assert!(matches!(greet, Message::Text(ref t) if t.as_str() == "greeting"));
let close = ws.next().await.unwrap().unwrap();
match close {
Message::Close(Some(cf)) => {
assert_eq!(u16::from(cf.code), 1000);
assert_eq!(cf.reason.as_str(), "bye");
}
other => panic!("expected close frame, got {other:?}"),
}
});
}
#[test]
fn ws_concurrent_clients() {
run(async {
let lua = create_vm();
let lua_for_serve = lua.clone();
tokio::task::spawn_local(async move {
lua_for_serve
.load(
r#"
http.serve(0, {
GET = {
["/id"] = function(req)
return { ws = function(conn)
while true do
local m = conn:read()
if not m then break end
conn:write("got:" .. m)
end
end }
end,
},
})
"#,
)
.exec_async()
.await
.ok();
});
let port = wait_for_port(&lua).await;
let url = format!("ws://127.0.0.1:{port}/id");
let mut handles = Vec::new();
for i in 0..5 {
let url = url.clone();
handles.push(tokio::task::spawn_local(async move {
let (mut ws, _) = tokio_tungstenite::connect_async(&url).await.unwrap();
let msg = format!("client-{i}");
ws.send(Message::Text(msg.clone().into())).await.unwrap();
let got = ws.next().await.unwrap().unwrap();
match got {
Message::Text(t) => {
assert_eq!(t.as_str(), format!("got:{msg}"));
}
other => panic!("expected text frame, got {other:?}"),
}
}));
}
for h in handles {
h.await.unwrap();
}
});
}
/// End-to-end: assay.shell.bridge a websocket to a `cat` PTY, exchange bytes,
/// verify the resize control frame is consumed (not echoed back).
#[test]
fn shell_bridge_to_cat_pty() {
run(async {
let lua = create_vm();
let lua_for_serve = lua.clone();
tokio::task::spawn_local(async move {
lua_for_serve
.load(
r#"
local shell = require("assay.shell")
http.serve(0, {
GET = {
["/shell"] = function(req)
return { ws = function(conn)
shell.bridge(conn, { cmd = "cat" })
end }
end,
},
})
"#,
)
.exec_async()
.await
.ok();
});
let port = wait_for_port(&lua).await;
let url = format!("ws://127.0.0.1:{port}/shell");
let (mut ws, _resp) = tokio_tungstenite::connect_async(&url).await.unwrap();
// Resize control frame — should be consumed by the bridge, not echoed.
ws.send(Message::Text(
r#"{"resize":{"cols":120,"rows":40}}"#.into(),
))
.await
.unwrap();
// Send actual bytes — cat should echo them back as binary frames
// (the bridge always uses opts.binary=true on PTY -> ws).
ws.send(Message::Binary(b"ping\n".to_vec().into()))
.await
.unwrap();
// Read back; expect to see "ping" within a few frames.
let mut got = Vec::<u8>::new();
for _ in 0..20 {
let frame = tokio::time::timeout(Duration::from_secs(2), ws.next())
.await
.expect("frame timeout")
.unwrap()
.unwrap();
match frame {
Message::Binary(b) => {
got.extend_from_slice(&b);
if got.windows(4).any(|w| w == b"ping") {
break;
}
}
Message::Text(t) => {
// The resize frame must NOT have come back as an echo.
assert!(
!t.as_str().contains("\"resize\""),
"resize control frame leaked back to client: {t:?}"
);
}
_ => {}
}
}
assert!(
got.windows(4).any(|w| w == b"ping"),
"didn't see 'ping' in PTY output: {got:?}"
);
ws.close(None).await.ok();
});
}