Refactor middleware handling for improved routing logic

Introduced a regex to pass through specific Vite requests and simplified middleware integration by directly using the middleware in the development server. Removed redundant return logic to handle request before vite-core middlewares.

Author: cod1k

packages/vite-plugin-cloudflare/src/index.ts

@@ -359,8 +359,13 @@ export function cloudflare(pluginConfig: PluginConfig = {}): vite.Plugin[] {
 
 				await initRunners(resolvedPluginConfig, viteDevServer, miniflare);
 
+				const viteHandle =
+					/^https?:\/\/[^/]+\/(?:(?:src|node_modules[^\/]*?\/)|@\w+)/i;
 				const middleware = createMiddleware(
-					async ({ request }) => {
+					async ({ request, passThrough }) => {
+						if (viteHandle.test(request.url)) {
+							return passThrough();
+						}
 						assert(miniflare, `Miniflare not defined`);
 						const routerWorker = await getRouterWorker(miniflare);
 
@@ -371,18 +376,14 @@ export function cloudflare(pluginConfig: PluginConfig = {}): vite.Plugin[] {
 					{ alwaysCallNext: false }
 				);
 
+				viteDevServer.middlewares.use(middleware);
+
 				handleWebSocket(viteDevServer.httpServer, async () => {
 					assert(miniflare, `Miniflare not defined`);
 					const routerWorker = await getRouterWorker(miniflare);
 
 					return routerWorker.fetch;
 				});
-
-				return () => {
-					viteDevServer.middlewares.use((req, res, next) => {
-						middleware(req, res, next);
-					});
-				};
 			},
 			async configurePreviewServer(vitePreviewServer) {
 				const workerConfigs = getWorkerConfigs(vitePreviewServer.config.root);