feat: add vnc app

backend/lib/websockify.ts

@@ -0,0 +1,50 @@
+import type { WebSocket } from "ws";
+import net from "node:net";
+
+// const log = console.log;
+const log = (..._args: any[]) => null;
+
+export const websockify = (
+  client: WebSocket,
+  targetHost: string,
+  targetPort: number
+) => {
+  const target = net.createConnection(targetPort, targetHost, function () {
+    log("connected to target");
+  });
+
+  target.on("data", function (data) {
+    try {
+      client.send(data);
+    } catch (e) {
+      log("Client closed, cleaning up target");
+      target.end();
+    }
+  });
+
+  target.on("end", function () {
+    log("target disconnected");
+    client.close();
+  });
+
+  target.on("error", function () {
+    log("target connection error");
+    target.end();
+    client.close();
+  });
+
+  client.on("message", function (msg) {
+    // log("CLIENT message: " + msg);
+    target.write(msg as never);
+  });
+
+  client.on("close", function (code, reason) {
+    log("WebSocket client disconnected: " + code + " [" + reason + "]");
+    target.end();
+  });
+
+  client.on("error", function (a) {
+    log("WebSocket client error: " + a);
+    target.end();
+  });
+};