feat: correct module visibility

crates/tuono_lib/src/vite_websocket_proxy.rs

@@ -0,0 +1,104 @@
+use axum::extract::ws::{self, WebSocket, WebSocketUpgrade};
+use axum::response::IntoResponse;
+use futures_util::{SinkExt, StreamExt};
+use tokio_tungstenite::connect_async;
+use tokio_tungstenite::tungstenite::{Error, Message};
+use tungstenite::client::IntoClientRequest;
+use tungstenite::ClientRequestBuilder;
+
+const VITE_WS: &str = "ws://localhost:3001/vite-server/";
+const VITE_WS_PROTOCOL: &str = "vite-hmr";
+
+/// This is the entry point to proxy the vite's WebSocket.
+/// The proxy is needed for allowing all the development requests to point
+/// to localhost:3000/*. This enabled the framework to be developed in a Docker
+/// environment with just the 3000 port exposed.
+pub async fn vite_websocket_proxy(ws: WebSocketUpgrade) -> impl IntoResponse {
+    ws.protocols([VITE_WS_PROTOCOL]).on_upgrade(handle_socket)
+}
+
+async fn handle_socket(mut tuono_socket: WebSocket) {
+    // Send back a message to confirm connection
+    if tuono_socket
+        .send(ws::Message::Ping("tuono connected".into()))
+        .await
+        .is_err()
+    {
+        // If is error close the connection
+        return;
+    }
+
+    let vite_ws_request = ClientRequestBuilder::new(VITE_WS.parse().unwrap())
+        .with_sub_protocol(VITE_WS_PROTOCOL)
+        .into_client_request()
+        .expect("Failed to create vite WS request");
+
+    let vite_socket = match connect_async(vite_ws_request).await {
+        Ok((stream, _)) => {
+            // Connected to vite's WebSocket
+            stream
+        }
+        Err(e) => {
+            eprintln!("Failed to connect to vite's WebSocket. Error: {e}");
+            // As fallback vite automatically connect to port 3001.
+            return;
+        }
+    };
+
+    let (mut vite_sender, mut vite_receiver) = vite_socket.split();
+    let (mut tuono_sender, mut tuono_receiver) = tuono_socket.split();
+
+    // Handle browser messages.
+    // Every message gets forwarded to the vite WebSocket
+    tokio::spawn(async move {
+        while let Some(msg) = tuono_receiver.next().await {
+            if let Ok(msg) = msg {
+                let msg_to_vite = match msg.clone() {
+                    ws::Message::Text(str) => Message::Text(str),
+                    ws::Message::Pong(payload) => Message::Pong(payload),
+                    ws::Message::Ping(payload) => Message::Ping(payload),
+                    ws::Message::Binary(payload) => Message::Binary(payload),
+                    // Hard to match axum and tungstenite close payload.
+                    // Not a priority
+                    ws::Message::Close(_) => Message::Close(None),
+                };
+
+                vite_sender
+                    .send(msg_to_vite)
+                    .await
+                    .expect("Failed to tunnel msg to vite's WebSocket");
+
+                msg
+            } else {
+                // Close browser's WebSocket connection.
+                return;
+            };
+        }
+    });
+
+    // Handle vite messages.
+    // Every message gets forwarded to the browser.
+    tokio::spawn(async move {
+        while let Some(Ok(msg)) = vite_receiver.next().await {
+            let msg_to_browser = match msg {
+                Message::Text(str) => ws::Message::Text(str),
+                Message::Ping(payload) => ws::Message::Ping(payload),
+                Message::Pong(payload) => ws::Message::Pong(payload),
+                Message::Binary(payload) => ws::Message::Binary(payload),
+                // Hard to match axum and tungstenite close payload.
+                // Not a priority
+                Message::Close(_) => ws::Message::Close(None),
+                _ => {
+                    eprintln!("Unexpected message from the vite WebSocket to the browser: {msg:?}");
+                    ws::Message::Text("Unhandled".to_string())
+                }
+            };
+
+            if let Err(err) = tuono_sender.send(msg_to_browser).await {
+                if err.to_string() != Error::AlreadyClosed.to_string() {
+                    eprintln!("Failed to send back message from vite to browser: {err}")
+                }
+            }
+        }
+    });
+}