enable access to cloudflare runtime (#5103)

* enable access to cloudflare runtime

* added get runtime api
added context to the runtime in "advanced" mode

* added typings and adjusted some return vars

* added default types

* added usage description to changeset and readme

Co-authored-by: AirBorne04 <unknown>
Co-authored-by: AirBorne04 <>

packages/integrations/cloudflare/README.md

@@ -68,6 +68,18 @@ $ pnpm install wrangler --save-dev
 
 It's then possible to update the preview script in your `package.json` to `"preview": "wrangler pages dev ./dist"`.This will allow you run your entire application locally with [Wrangler](https://github.com/cloudflare/wrangler2), which supports secrets, environment variables, KV namespaces, Durable Objects and [all other supported Cloudflare bindings](https://developers.cloudflare.com/pages/platform/functions/#adding-bindings).
 
+## Access to the cloudflare runtime
+
+You have the posibility to access all the cloudflare bindings and environment variables from your astro pages and api routes through the adapter API
+
+```
+import { getRuntime } from "@astrojs/cloudflare/runtime";
+
+getRuntime(Astro.request);
+```
+
+Depending your adapter mode (advanced = worker, directory = pages) the runtime object will look a little different due to the difference in the cloudflare API.
+
 ## Streams
 
 Some integrations such as [React](https://github.com/withastro/astro/tree/main/packages/integrations/react) rely on web streams. Currently Cloudflare Pages Functions require enabling a flag to support Streams.

packages/integrations/cloudflare/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@astrojs/cloudflare",
-  "description": "Deploy your site to cloudflare pages functions",
+  "description": "Deploy your site to cloudflare workers or cloudflare pages",
   "version": "3.1.0",
   "type": "module",
   "types": "./dist/index.d.ts",
@@ -19,6 +19,7 @@
   "homepage": "https://docs.astro.build/en/guides/integrations-guide/cloudflare/",
   "exports": {
     ".": "./dist/index.js",
+    "./runtime": "./dist/runtime.js",
     "./server.advanced.js": "./dist/server.advanced.js",
     "./server.directory.js": "./dist/server.directory.js",
     "./package.json": "./package.json"

packages/integrations/cloudflare/src/runtime.ts

@@ -0,0 +1,28 @@
+export type WorkerRuntime<T = unknown> = {
+	name: 'cloudflare';
+	env: T;
+	waitUntil(promise: Promise<any>): void;
+	passThroughOnException(): void;
+};
+
+export type PagesRuntime<T = unknown, U = unknown> = {
+	name: 'cloudflare';
+	env: T;
+	functionPath: string;
+	params: Record<string, string>;
+	data: U;
+	waitUntil(promise: Promise<any>): void;
+	next(request: Request): void;
+};
+
+export function getRuntime<T = unknown, U = unknown>(
+	request: Request
+): WorkerRuntime<T> | PagesRuntime<T, U> {
+	if (!!request) {
+		return Reflect.get(request, Symbol.for('runtime'));
+	} else {
+		throw new Error(
+			'To retrieve the current cloudflare runtime you need to pass in the Astro request object'
+		);
+	}
+}

packages/integrations/cloudflare/src/server.advanced.ts

@@ -5,12 +5,13 @@ import { App } from 'astro/app';
 
 type Env = {
 	ASSETS: { fetch: (req: Request) => Promise<Response> };
+	name: string;
 };
 
 export function createExports(manifest: SSRManifest) {
 	const app = new App(manifest, false);
 
-	const fetch = async (request: Request, env: Env) => {
+	const fetch = async (request: Request, env: Env, context: any) => {
 		const { origin, pathname } = new URL(request.url);
 
 		// static assets
@@ -26,6 +27,7 @@ export function createExports(manifest: SSRManifest) {
 				Symbol.for('astro.clientAddress'),
 				request.headers.get('cf-connecting-ip')
 			);
+			Reflect.set(request, Symbol.for('runtime'), { env, name: 'cloudflare', ...context });
 			let response = await app.render(request, routeData);
 
 			if (app.setCookieHeaders) {

packages/integrations/cloudflare/src/server.directory.ts

@@ -9,12 +9,12 @@ export function createExports(manifest: SSRManifest) {
 	const onRequest = async ({
 		request,
 		next,
+		...runtimeEnv
 	}: {
 		request: Request;
 		next: (request: Request) => void;
-	}) => {
+	} & Record<string, unknown>) => {
 		const { origin, pathname } = new URL(request.url);
-
 		// static assets
 		if (manifest.assets.has(pathname)) {
 			const assetRequest = new Request(`${origin}/static${pathname}`, request);
@@ -28,6 +28,11 @@ export function createExports(manifest: SSRManifest) {
 				Symbol.for('astro.clientAddress'),
 				request.headers.get('cf-connecting-ip')
 			);
+			Reflect.set(request, Symbol.for('runtime'), {
+				...runtimeEnv,
+				name: 'cloudflare',
+				next,
+			});
 			let response = await app.render(request, routeData);
 
 			if (app.setCookieHeaders) {