Fix WS protocol for trycp client

CHANGELOG.md

@@ -8,6 +8,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ### Removed
 ### Changed
 ### Fixed
+- The `trycp_client` now handles ping/pong messages from the TryCP server to keep the connection alive.
+- The `trycp_client` now handles the `close` event from the TryCP server to close the connection.
 
 ## 2024-05-03: v0.17.0-dev.0
 ### Changed

crates/trycp_client/src/lib.rs

@@ -72,10 +72,30 @@ impl TrycpClient {
 
         let (recv_send, recv_recv) = tokio::sync::mpsc::channel(32);
 
+        let ws = Arc::new(tokio::sync::Mutex::new(sink));
+        let ws2 = ws.clone();
         let pend2 = pend.clone();
         let recv_task = tokio::task::spawn(async move {
             while let Some(Ok(msg)) = stream.next().await {
-                let msg = msg.into_data();
+                let msg = match msg {
+                    Message::Close(close_msg) => {
+                        eprintln!("Received websocket close from TryCP server: {}", close_msg.map(|f| f.reason).unwrap_or("No reason".into()));
+                        break;
+                    }
+                    Message::Ping(p) => {
+                        ws2.lock().await.send(Message::Pong(p)).await.unwrap();
+                        continue;
+                    }
+                    Message::Pong(_) => {
+                        continue;
+                    }
+                    Message::Binary(msg) => {
+                        msg
+                    }
+                    _ => {
+                        panic!("Unexpected message from TryCP server: {:?}", msg);
+                    }
+                };
                 let msg: MessageToClient = rmp_serde::from_slice(&msg).unwrap();
 
                 match msg {
@@ -91,8 +111,6 @@ impl TrycpClient {
             }
         });
 
-        let ws = Arc::new(tokio::sync::Mutex::new(sink));
-
         Ok((
             Self {
                 ws,

crates/trycp_server/src/app_interface.rs

@@ -61,7 +61,7 @@ pub(crate) async fn connect(
     port: u16,
     response_writer: Arc<futures::lock::Mutex<WsResponseWriter>>,
 ) -> Result<(), ConnectError> {
-    let connection_lock = Arc::clone(&CONNECTIONS.lock().await.entry(port).or_default());
+    let connection_lock = Arc::clone(CONNECTIONS.lock().await.entry(port).or_default());
 
     let mut connection = connection_lock.lock().await;
     if connection.is_some() {

crates/trycp_server/src/download_dna.rs

@@ -74,7 +74,7 @@ pub(crate) async fn download_dna(url_str: String) -> Result<String, DownloadDnaE
 fn get_downloaded_dna_path(url: &url::Url) -> PathBuf {
     Path::new(DNA_DIR_PATH)
         .join(url.scheme())
-        .join(url.path().replace("/", "").replace("%", "_"))
+        .join(url.path().replace('/', "").replace('%', "_"))
 }
 
 /// Tries to create a file, returning Ok(None) if a file already exists at path