http: expose websocket in nodehttp

lib/http.js

@@ -44,6 +44,7 @@
   ServerResponse,
 } = require('_http_server');
 let maxHeaderSize;
+let WebSocket, MessageEvent, CloseEvent;
 
 /**
  * Returns a new instance of `http.Server`.
@@ -116,6 +117,17 @@
   return req;
 }
 
+/**
+ * Lazy loads WebSocket, CloseEvent and MessageEvent classes from undici
+ * @returns {Object} An object containing WebSocket, CloseEvent, and MessageEvent classes.
+ */
+function lazyWebSocket() {
+  if (!WebSocket) {
+    ({ WebSocket, CloseEvent, MessageEvent } = require('internal/deps/undici/undici'));
+  }
+  return { WebSocket, CloseEvent, MessageEvent };
+}
+
 module.exports = {
   _connectionListener,
   METHODS: ArrayPrototypeSort(ArrayPrototypeSlice(methods)),
@@ -126,6 +138,9 @@
   OutgoingMessage,
   Server,
   ServerResponse,
+  WebSocket,
+  MessageEvent,
+  CloseEvent,
   createServer,
   validateHeaderName,
   validateHeaderValue,
@@ -162,3 +177,30 @@
     httpAgent.globalAgent = value;
   },
 });
+
+ObjectDefineProperty(module.exports, 'WebSocket', {
+  __proto__: null,
+  configurable: true,
+  enumerable: true,
+  get() {
+    return lazyWebSocket().WebSocket;
+  }
+});
+
+ObjectDefineProperty(module.exports, 'CloseEvent', {
+  __proto__: null,
+  configurable: true,
+  enumerable: true,
+  get() {
+    return lazyWebSocket().CloseEvent;
+  }
+});
+
+ObjectDefineProperty(module.exports, 'MessageEvent', {
+  __proto__: null,
+  configurable: true,
+  enumerable: true,
+  get() {
+    return lazyWebSocket().MessageEvent;
+  }
+});

test/parallel/test-http-import-websocket.js

@@ -0,0 +1,11 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+const { WebSocket: NodeHttpWebSocket, CloseEvent: NodeHttpCloseEvent, MessageEvent: NodeHttpMessageEvent } = require('node:http');
+
+
+// compare with global objects
+assert.strictEqual(NodeHttpWebSocket, WebSocket);
+assert.strictEqual(NodeHttpCloseEvent, CloseEvent);
+assert.strictEqual(NodeHttpMessageEvent, MessageEvent);