Close Lens Proxy on quit of backend (#7453)

- Extract global shared state of shell sessions

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/main/lens-proxy/close-on-quit.injectable.ts

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import { getInjectable } from "@ogre-tools/injectable";
+import { beforeQuitOfBackEndInjectionToken } from "../start-main-application/runnable-tokens/phases";
+import lensProxyInjectable from "./lens-proxy.injectable";
+
+const closeLensProxyOnQuitInjectable = getInjectable({
+  id: "close-lens-proxy-on-quit",
+  instantiate: (di) => ({
+    run: async () => {
+      const lensProxy = di.inject(lensProxyInjectable);
+
+      await lensProxy.close();
+    },
+  }),
+  injectionToken: beforeQuitOfBackEndInjectionToken,
+});
+
+export default closeLensProxyOnQuitInjectable;

packages/core/src/main/lens-proxy/lens-proxy.ts

@@ -48,7 +48,7 @@ export function isLongRunningRequest(reqUrl: string) {
 
 /**
  * This is the list of ports that chrome considers unsafe to allow HTTP
- * conntections to. Because they are the standard ports for processes that are
+ * connections to. Because they are the standard ports for processes that are
  * too forgiving in the connection types they accept.
  *
  * If we get one of these ports, the easiest thing to do is to just try again.
@@ -166,10 +166,17 @@ export class LensProxy {
   }
 
   close() {
+    if (this.closed) {
+      return;
+    }
+
+    // mark as closed immediately
+    this.closed = true;
     this.dependencies.logger.info("[LENS-PROXY]: Closing server");
 
-    this.proxyServer.close();
-    this.closed = true;
+    return new Promise<void>((resolve) => {
+      this.proxyServer.close(() => resolve());
+    });
   }
 
   protected configureProxy(proxy: httpProxy): httpProxy {