Initial commit (by create-cloudflare CLI)

11 files changed, 648 insertions, 0 deletions

diff --git a/node_modules/wrangler/templates/middleware/common.ts b/node_modules/wrangler/templates/middleware/common.ts
new file mode 100644
index 0000000..1319e5d
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/common.ts
@@ -0,0 +1,67 @@
+export type Awaitable<T> = T | Promise<T>;
+// TODO: allow dispatching more events?
+export type Dispatcher = (
+	type: "scheduled",
+	init: { cron?: string }
+) => Awaitable<void>;
+
+export type IncomingRequest = Request<
+	unknown,
+	IncomingRequestCfProperties<unknown>
+>;
+
+export interface MiddlewareContext {
+	dispatch: Dispatcher;
+	next(request: IncomingRequest, env: any): Awaitable<Response>;
+}
+
+export type Middleware = (
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	middlewareCtx: MiddlewareContext
+) => Awaitable<Response>;
+
+const __facade_middleware__: Middleware[] = [];
+
+// The register functions allow for the insertion of one or many middleware,
+// We register internal middleware first in the stack, but have no way of controlling
+// the order that addMiddleware is run in service workers so need an internal function.
+export function __facade_register__(...args: (Middleware | Middleware[])[]) {
+	__facade_middleware__.push(...args.flat());
+}
+export function __facade_registerInternal__(
+	...args: (Middleware | Middleware[])[]
+) {
+	__facade_middleware__.unshift(...args.flat());
+}
+
+function __facade_invokeChain__(
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	dispatch: Dispatcher,
+	middlewareChain: Middleware[]
+): Awaitable<Response> {
+	const [head, ...tail] = middlewareChain;
+	const middlewareCtx: MiddlewareContext = {
+		dispatch,
+		next(newRequest, newEnv) {
+			return __facade_invokeChain__(newRequest, newEnv, ctx, dispatch, tail);
+		},
+	};
+	return head(request, env, ctx, middlewareCtx);
+}
+
+export function __facade_invoke__(
+	request: IncomingRequest,
+	env: any,
+	ctx: ExecutionContext,
+	dispatch: Dispatcher,
+	finalMiddleware: Middleware
+): Awaitable<Response> {
+	return __facade_invokeChain__(request, env, ctx, dispatch, [
+		...__facade_middleware__,
+		finalMiddleware,
+	]);
+}
diff --git a/node_modules/wrangler/templates/middleware/loader-modules.ts b/node_modules/wrangler/templates/middleware/loader-modules.ts
new file mode 100644
index 0000000..3da0c44
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/loader-modules.ts
@@ -0,0 +1,137 @@
+// // This loads all middlewares exposed on the middleware object
+// // and then starts the invocation chain.
+// // The big idea is that we can add these to the middleware export dynamically
+// // through wrangler, or we can potentially let users directly add them as a sort
+// // of "plugin" system.
+
+import {
+	Dispatcher,
+	Middleware,
+	__facade_invoke__,
+	__facade_register__,
+} from "./common";
+
+import worker from "__ENTRY_POINT__";
+
+// We need to preserve all of the exports from the worker
+export * from "__ENTRY_POINT__";
+
+class __Facade_ScheduledController__ implements ScheduledController {
+	#noRetry: ScheduledController["noRetry"];
+
+	constructor(
+		readonly scheduledTime: number,
+		readonly cron: string,
+		noRetry: ScheduledController["noRetry"]
+	) {
+		this.#noRetry = noRetry;
+	}
+
+	noRetry() {
+		if (!(this instanceof __Facade_ScheduledController__)) {
+			throw new TypeError("Illegal invocation");
+		}
+		// Need to call native method immediately in case uncaught error thrown
+		this.#noRetry();
+	}
+}
+
+const __facade_modules_fetch__: ExportedHandlerFetchHandler = function (
+	request,
+	env,
+	ctx
+) {
+	if (worker.fetch === undefined)
+		throw new Error("Handler does not export a fetch() function.");
+	return worker.fetch(request, env, ctx);
+};
+
+function getMaskedEnv(rawEnv: unknown) {
+	let env = rawEnv as Record<string, unknown>;
+	if (worker.envWrappers && worker.envWrappers.length > 0) {
+		for (const wrapFn of worker.envWrappers) {
+			env = wrapFn(env);
+		}
+	}
+	return env;
+}
+
+/**
+ * This type is here to cause a type error if a new export handler is added to
+ * `ExportHandler` without it being included in the `facade` below.
+ */
+type MissingExportHandlers = Omit<
+	Required<ExportedHandler>,
+	"tail" | "trace" | "scheduled" | "queue" | "test" | "email" | "fetch"
+>;
+
+let registeredMiddleware = false;
+
+const facade: ExportedHandler<unknown> & MissingExportHandlers = {
+	...(worker.tail && {
+		tail: maskHandlerEnv(worker.tail),
+	}),
+	...(worker.trace && {
+		trace: maskHandlerEnv(worker.trace),
+	}),
+	...(worker.scheduled && {
+		scheduled: maskHandlerEnv(worker.scheduled),
+	}),
+	...(worker.queue && {
+		queue: maskHandlerEnv(worker.queue),
+	}),
+	...(worker.test && {
+		test: maskHandlerEnv(worker.test),
+	}),
+	...(worker.email && {
+		email: maskHandlerEnv(worker.email),
+	}),
+
+	fetch(request, rawEnv, ctx) {
+		const env = getMaskedEnv(rawEnv);
+		// Get the chain of middleware from the worker object
+		if (worker.middleware && worker.middleware.length > 0) {
+			// Make sure we only register middleware once:
+			// https://github.com/cloudflare/workers-sdk/issues/2386#issuecomment-1614715911
+			if (!registeredMiddleware) {
+				registeredMiddleware = true;
+				for (const middleware of worker.middleware) {
+					__facade_register__(middleware);
+				}
+			}
+
+			const __facade_modules_dispatch__: Dispatcher = function (type, init) {
+				if (type === "scheduled" && worker.scheduled !== undefined) {
+					const controller = new __Facade_ScheduledController__(
+						Date.now(),
+						init.cron ?? "",
+						() => {}
+					);
+					return worker.scheduled(controller, env, ctx);
+				}
+			};
+
+			return __facade_invoke__(
+				request,
+				env,
+				ctx,
+				__facade_modules_dispatch__,
+				__facade_modules_fetch__
+			);
+		} else {
+			// We didn't have any middleware so we can skip the invocation chain,
+			// and just call the fetch handler directly
+
+			// We "don't care" if this is undefined as we want to have the same behavior
+			// as if the worker completely bypassed middleware.
+			return __facade_modules_fetch__(request, env, ctx);
+		}
+	},
+};
+
+type HandlerFn<D, R> = (data: D, env: unknown, ctx: ExecutionContext) => R;
+function maskHandlerEnv<D, R>(handler: HandlerFn<D, R>): HandlerFn<D, R> {
+	return (data, env, ctx) => handler(data, getMaskedEnv(env), ctx);
+}
+
+export default facade;
diff --git a/node_modules/wrangler/templates/middleware/loader-sw.ts b/node_modules/wrangler/templates/middleware/loader-sw.ts
new file mode 100644
index 0000000..9e465f9
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/loader-sw.ts
@@ -0,0 +1,228 @@
+import {
+	Awaitable,
+	Dispatcher,
+	IncomingRequest,
+	Middleware,
+	__facade_invoke__,
+	__facade_register__,
+	__facade_registerInternal__,
+} from "./common";
+export { __facade_register__, __facade_registerInternal__ };
+
+// Miniflare 2's `EventTarget` follows the spec and doesn't allow exceptions to
+// be caught by `dispatchEvent`. Instead it has a custom `ThrowingEventTarget`
+// class that rethrows errors from event listeners in `dispatchEvent`.
+// We'd like errors to be propagated to the top-level `addEventListener`, so
+// we'd like to use `ThrowingEventTarget`. Unfortunately, `ThrowingEventTarget`
+// isn't exposed on the global scope, but `WorkerGlobalScope` (which extends
+// `ThrowingEventTarget`) is. Therefore, we get at it in this nasty way.
+let __FACADE_EVENT_TARGET__: EventTarget;
+if ((globalThis as any).MINIFLARE) {
+	__FACADE_EVENT_TARGET__ = new (Object.getPrototypeOf(WorkerGlobalScope))();
+} else {
+	__FACADE_EVENT_TARGET__ = new EventTarget();
+}
+
+function __facade_isSpecialEvent__(
+	type: string
+): type is "fetch" | "scheduled" {
+	return type === "fetch" || type === "scheduled";
+}
+const __facade__originalAddEventListener__ = globalThis.addEventListener;
+const __facade__originalRemoveEventListener__ = globalThis.removeEventListener;
+const __facade__originalDispatchEvent__ = globalThis.dispatchEvent;
+
+globalThis.addEventListener = function (type, listener, options) {
+	if (__facade_isSpecialEvent__(type)) {
+		__FACADE_EVENT_TARGET__.addEventListener(
+			type,
+			listener as EventListenerOrEventListenerObject,
+			options
+		);
+	} else {
+		__facade__originalAddEventListener__(type, listener, options);
+	}
+};
+globalThis.removeEventListener = function (type, listener, options) {
+	if (__facade_isSpecialEvent__(type)) {
+		__FACADE_EVENT_TARGET__.removeEventListener(
+			type,
+			listener as EventListenerOrEventListenerObject,
+			options
+		);
+	} else {
+		__facade__originalRemoveEventListener__(type, listener, options);
+	}
+};
+globalThis.dispatchEvent = function (event) {
+	if (__facade_isSpecialEvent__(event.type)) {
+		return __FACADE_EVENT_TARGET__.dispatchEvent(event);
+	} else {
+		return __facade__originalDispatchEvent__(event);
+	}
+};
+
+declare global {
+	var addMiddleware: typeof __facade_register__;
+	var addMiddlewareInternal: typeof __facade_registerInternal__;
+}
+globalThis.addMiddleware = __facade_register__;
+globalThis.addMiddlewareInternal = __facade_registerInternal__;
+
+const __facade_waitUntil__ = Symbol("__facade_waitUntil__");
+const __facade_response__ = Symbol("__facade_response__");
+const __facade_dispatched__ = Symbol("__facade_dispatched__");
+
+class __Facade_ExtendableEvent__ extends Event {
+	[__facade_waitUntil__]: Awaitable<unknown>[] = [];
+
+	waitUntil(promise: Awaitable<any>) {
+		if (!(this instanceof __Facade_ExtendableEvent__)) {
+			throw new TypeError("Illegal invocation");
+		}
+		this[__facade_waitUntil__].push(promise);
+	}
+}
+
+interface FetchEventInit extends EventInit {
+	request: Request;
+	passThroughOnException: FetchEvent["passThroughOnException"];
+}
+
+class __Facade_FetchEvent__ extends __Facade_ExtendableEvent__ {
+	#request: Request;
+	#passThroughOnException: FetchEvent["passThroughOnException"];
+	[__facade_response__]?: Awaitable<Response>;
+	[__facade_dispatched__] = false;
+
+	constructor(type: "fetch", init: FetchEventInit) {
+		super(type);
+		this.#request = init.request;
+		this.#passThroughOnException = init.passThroughOnException;
+	}
+
+	get request() {
+		return this.#request;
+	}
+
+	respondWith(response: Awaitable<Response>) {
+		if (!(this instanceof __Facade_FetchEvent__)) {
+			throw new TypeError("Illegal invocation");
+		}
+		if (this[__facade_response__] !== undefined) {
+			throw new DOMException(
+				"FetchEvent.respondWith() has already been called; it can only be called once.",
+				"InvalidStateError"
+			);
+		}
+		if (this[__facade_dispatched__]) {
+			throw new DOMException(
+				"Too late to call FetchEvent.respondWith(). It must be called synchronously in the event handler.",
+				"InvalidStateError"
+			);
+		}
+		this.stopImmediatePropagation();
+		this[__facade_response__] = response;
+	}
+
+	passThroughOnException() {
+		if (!(this instanceof __Facade_FetchEvent__)) {
+			throw new TypeError("Illegal invocation");
+		}
+		// Need to call native method immediately in case uncaught error thrown
+		this.#passThroughOnException();
+	}
+}
+
+interface ScheduledEventInit extends EventInit {
+	scheduledTime: number;
+	cron: string;
+	noRetry: ScheduledEvent["noRetry"];
+}
+
+class __Facade_ScheduledEvent__ extends __Facade_ExtendableEvent__ {
+	#scheduledTime: number;
+	#cron: string;
+	#noRetry: ScheduledEvent["noRetry"];
+
+	constructor(type: "scheduled", init: ScheduledEventInit) {
+		super(type);
+		this.#scheduledTime = init.scheduledTime;
+		this.#cron = init.cron;
+		this.#noRetry = init.noRetry;
+	}
+
+	get scheduledTime() {
+		return this.#scheduledTime;
+	}
+
+	get cron() {
+		return this.#cron;
+	}
+
+	noRetry() {
+		if (!(this instanceof __Facade_ScheduledEvent__)) {
+			throw new TypeError("Illegal invocation");
+		}
+		// Need to call native method immediately in case uncaught error thrown
+		this.#noRetry();
+	}
+}
+
+__facade__originalAddEventListener__("fetch", (event) => {
+	const ctx: ExecutionContext = {
+		waitUntil: event.waitUntil.bind(event),
+		passThroughOnException: event.passThroughOnException.bind(event),
+	};
+
+	const __facade_sw_dispatch__: Dispatcher = function (type, init) {
+		if (type === "scheduled") {
+			const facadeEvent = new __Facade_ScheduledEvent__("scheduled", {
+				scheduledTime: Date.now(),
+				cron: init.cron ?? "",
+				noRetry() {},
+			});
+
+			__FACADE_EVENT_TARGET__.dispatchEvent(facadeEvent);
+			event.waitUntil(Promise.all(facadeEvent[__facade_waitUntil__]));
+		}
+	};
+
+	const __facade_sw_fetch__: Middleware = function (request, _env, ctx) {
+		const facadeEvent = new __Facade_FetchEvent__("fetch", {
+			request,
+			passThroughOnException: ctx.passThroughOnException,
+		});
+
+		__FACADE_EVENT_TARGET__.dispatchEvent(facadeEvent);
+		facadeEvent[__facade_dispatched__] = true;
+		event.waitUntil(Promise.all(facadeEvent[__facade_waitUntil__]));
+
+		const response = facadeEvent[__facade_response__];
+		if (response === undefined) {
+			throw new Error("No response!"); // TODO: proper error message
+		}
+		return response;
+	};
+
+	event.respondWith(
+		__facade_invoke__(
+			event.request as IncomingRequest,
+			globalThis,
+			ctx,
+			__facade_sw_dispatch__,
+			__facade_sw_fetch__
+		)
+	);
+});
+
+__facade__originalAddEventListener__("scheduled", (event) => {
+	const facadeEvent = new __Facade_ScheduledEvent__("scheduled", {
+		scheduledTime: event.scheduledTime,
+		cron: event.cron,
+		noRetry: event.noRetry.bind(event),
+	});
+
+	__FACADE_EVENT_TARGET__.dispatchEvent(facadeEvent);
+	event.waitUntil(Promise.all(facadeEvent[__facade_waitUntil__]));
+});
diff --git a/node_modules/wrangler/templates/middleware/middleware-d1-beta.d.ts b/node_modules/wrangler/templates/middleware/middleware-d1-beta.d.ts
new file mode 100644
index 0000000..5ee0e6f
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-d1-beta.d.ts
@@ -0,0 +1,3 @@
+declare module "config:middleware/d1-beta" {
+	export const D1_IMPORTS: string[];
+}
diff --git a/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts b/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts
new file mode 100644
index 0000000..9377781
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-miniflare3-json-error.ts
@@ -0,0 +1,33 @@
+import type { Middleware } from "./common";
+
+interface JsonError {
+	message?: string;
+	name?: string;
+	stack?: string;
+	cause?: JsonError;
+}
+
+function reduceError(e: any): JsonError {
+	return {
+		name: e?.name,
+		message: e?.message ?? String(e),
+		stack: e?.stack,
+		cause: e?.cause === undefined ? undefined : reduceError(e.cause),
+	};
+}
+
+// See comment in `bundle.ts` for details on why this is needed
+const jsonError: Middleware = async (request, env, _ctx, middlewareCtx) => {
+	try {
+		return await middlewareCtx.next(request, env);
+	} catch (e: any) {
+		const error = reduceError(e);
+		return Response.json(error, {
+			status: 500,
+			headers: { "MF-Experimental-Error-Stack": "true" },
+		});
+	}
+};
+
+export default jsonError;
+export const wrap = undefined;
diff --git a/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.d.ts b/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.d.ts
new file mode 100644
index 0000000..704b273
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.d.ts
@@ -0,0 +1,4 @@
+declare module "config:middleware/multiworker-dev" {
+	import type { WorkerRegistry } from "../../src/dev-registry";
+	export const workers: WorkerRegistry;
+}
diff --git a/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.ts b/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.ts
new file mode 100644
index 0000000..fee33d5
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-multiworker-dev.ts
@@ -0,0 +1,59 @@
+// @ts-nocheck
+/// <reference path="middleware-multiworker-dev.d.ts"/>
+
+import { workers } from "config:middleware/multiworker-dev";
+import type { WorkerRegistry } from "../../src/dev-registry";
+
+export function wrap(env: Record<string, unknown>) {
+	const facadeEnv = { ...env };
+	// For every Worker definition that's available,
+	// create a fetcher for it on the facade env.
+	// for const [name,  binding] of env
+	// if Workers[name]
+	// const details = Workers[name];
+
+	for (const [name, details] of Object.entries(workers as WorkerRegistry)) {
+		if (details) {
+			facadeEnv[name] = {
+				async fetch(...reqArgs: Parameters<Fetcher["fetch"]>) {
+					const reqFromArgs = new Request(...reqArgs);
+					if (details.headers) {
+						for (const [key, value] of Object.entries(details.headers)) {
+							// In remote mode, you need to add a couple of headers
+							// to make sure it's talking to the 'dev' preview session
+							// (much like wrangler dev already does via proxy.ts)
+							reqFromArgs.headers.set(key, value);
+						}
+						return (env[name] as Fetcher).fetch(reqFromArgs);
+					}
+
+					const url = new URL(reqFromArgs.url);
+					if (details.protocol !== undefined) {
+						url.protocol = details.protocol;
+					}
+					if (details.host !== undefined) {
+						url.host = details.host;
+					}
+					if (details.port !== undefined) {
+						url.port = details.port.toString();
+					}
+
+					const request = new Request(url.toString(), reqFromArgs);
+					return fetch(request);
+				},
+			};
+		} else {
+			// This means there's no dev binding available.
+			// Let's use whatever's available, or put a shim with a message.
+			facadeEnv[name] = facadeEnv[name] || {
+				async fetch() {
+					return new Response(
+						`You should start up wrangler dev --local on the ${name} worker`,
+						{ status: 404 }
+					);
+				},
+			};
+		}
+	}
+	return facadeEnv;
+}
diff --git a/node_modules/wrangler/templates/middleware/middleware-pretty-error.ts b/node_modules/wrangler/templates/middleware/middleware-pretty-error.ts
new file mode 100644
index 0000000..29dc6d0
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-pretty-error.ts
@@ -0,0 +1,40 @@
+import type { Middleware } from "./common";
+
+// A middleware has to be a function of type Middleware
+const prettyError: Middleware = async (request, env, _ctx, middlewareCtx) => {
+	try {
+		const response = await middlewareCtx.next(request, env);
+		return response;
+	} catch (e: any) {
+		const html = `
+    <!DOCTYPE html>
+    <html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <meta http-equiv="X-UA-Compatible" content="IE=edge">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <title>Error 🚨</title>
+        <style>
+          pre {
+            margin: 16px auto;
+            max-width: 600px;
+            background-color: #eeeeee;
+            border-radius: 4px;
+            padding: 16px;
+          }
+        </style>
+    </head>
+    <body>
+        <pre>${e.stack}</pre>
+    </body>
+    </html>
+    `;
+
+		return new Response(html, {
+			status: 500,
+			headers: { "Content-Type": "text/html;charset=utf-8" },
+		});
+	}
+};
+
+export default prettyError;
diff --git a/node_modules/wrangler/templates/middleware/middleware-scheduled.ts b/node_modules/wrangler/templates/middleware/middleware-scheduled.ts
new file mode 100644
index 0000000..3d9da28
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-scheduled.ts
@@ -0,0 +1,15 @@
+import type { Middleware } from "./common";
+
+// A middleware has to be a function of type Middleware
+const scheduled: Middleware = async (request, env, _ctx, middlewareCtx) => {
+	const url = new URL(request.url);
+	if (url.pathname === "/__scheduled") {
+		const cron = url.searchParams.get("cron") ?? "";
+		await middlewareCtx.dispatch("scheduled", { cron });
+
+		return new Response("Ran scheduled event");
+	}
+	return middlewareCtx.next(request, env);
+};
+
+export default scheduled;
diff --git a/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.d.ts b/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.d.ts
new file mode 100644
index 0000000..88ff173
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.d.ts
@@ -0,0 +1,6 @@
+declare module "config:middleware/serve-static-assets" {
+	import type { CacheControl } from "@cloudflare/kv-asset-handler";
+
+	export const spaMode: boolean;
+	export const cacheControl: Partial<CacheControl>;
+}
diff --git a/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.ts b/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.ts
new file mode 100644
index 0000000..4f72f40
--- /dev/null
+++ b/node_modules/wrangler/templates/middleware/middleware-serve-static-assets.ts
@@ -0,0 +1,56 @@
+/// <reference path="middleware-serve-static-assets.d.ts"/>
+
+import {
+	getAssetFromKV,
+	NotFoundError,
+	MethodNotAllowedError,
+	serveSinglePageApp,
+} from "@cloudflare/kv-asset-handler";
+import type { Options } from "@cloudflare/kv-asset-handler";
+import { spaMode, cacheControl } from "config:middleware/serve-static-assets";
+import type * as kvAssetHandler from "@cloudflare/kv-asset-handler";
+import manifest from "__STATIC_CONTENT_MANIFEST";
+const ASSET_MANIFEST = JSON.parse(manifest);
+
+import type { Middleware } from "./common";
+
+const staticAssets: Middleware = async (request, env, _ctx, middlewareCtx) => {
+	let options: Partial<Options> = {
+		ASSET_MANIFEST,
+		ASSET_NAMESPACE: env.__STATIC_CONTENT,
+		cacheControl: cacheControl,
+		mapRequestToAsset: spaMode ? serveSinglePageApp : undefined,
+	};
+
+	try {
+		const page = await (getAssetFromKV as typeof kvAssetHandler.getAssetFromKV)(
+			{
+				request,
+				waitUntil(promise) {
+					return _ctx.waitUntil(promise);
+				},
+			},
+			options
+		);
+
+		// allow headers to be altered
+		const response = new Response(page.body, page);
+
+		response.headers.set("X-XSS-Protection", "1; mode=block");
+		response.headers.set("X-Content-Type-Options", "nosniff");
+		response.headers.set("X-Frame-Options", "DENY");
+		response.headers.set("Referrer-Policy", "unsafe-url");
+		response.headers.set("Feature-Policy", "none");
+
+		return response;
+	} catch (e) {
+		if (e instanceof NotFoundError || e instanceof MethodNotAllowedError) {
+			// if a known error is thrown then serve from actual worker
+			return await middlewareCtx.next(request, env);
+		}
+		// otherwise it's a real error, so throw it
+		throw e;
+	}
+};
+
+export default staticAssets;