chore: remove undici polyfill (#8729)

.changeset/green-crabs-breathe.md

@@ -0,0 +1,5 @@
+---
+'@astrojs/telemetry': patch
+---
+
+Removed an unnecessary dependency.

.changeset/thirty-ravens-fly.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Node-based adapters now create less server-side javascript

packages/astro/astro.js

@@ -3,7 +3,6 @@
 
 // ISOMORPHIC FILE: NO TOP-LEVEL IMPORT/REQUIRE() ALLOWED
 // This file has to run as both ESM and CJS on older Node.js versions
-// Needed for Stackblitz: https://github.com/stackblitz/webcontainer-core/issues/281
 
 const CI_INSTRUCTIONS = {
 	NETLIFY: 'https://docs.netlify.com/configure-builds/manage-dependencies/#node-js-and-javascript',
@@ -16,15 +15,11 @@ const CI_INSTRUCTIONS = {
 const engines = '>=18.14.1';
 const skipSemverCheckIfAbove = 19;
 
-// HACK (2023-08-18) Stackblitz does not support Node 18 yet, so we'll fake Node 16 support for some time until it's supported
-// TODO: Remove when Node 18 is supported on Stackblitz
-const isStackblitz = process.env.SHELL === '/bin/jsh' && process.versions.webcontainer != null;
-
 /** `astro *` */
 async function main() {
 	const version = process.versions.node;
 	// Fast-path for higher Node.js versions
-	if (!isStackblitz && (parseInt(version) || 0) <= skipSemverCheckIfAbove) {
+	if ((parseInt(version) || 0) <= skipSemverCheckIfAbove) {
 		try {
 			const semver = await import('semver');
 			if (!semver.satisfies(version, engines)) {

packages/astro/package.json

@@ -168,7 +168,6 @@
     "string-width": "^6.1.0",
     "strip-ansi": "^7.1.0",
     "tsconfig-resolver": "^3.0.1",
-    "undici": "^5.23.0",
     "unist-util-visit": "^4.1.2",
     "vfile": "^5.3.7",
     "vite": "^4.4.9",

packages/astro/src/core/endpoint/index.ts

@@ -39,7 +39,6 @@ export function createAPIContext({
 	props,
 	adapterName,
 }: CreateAPIContext): APIContext {
-	initResponseWithEncoding();
 	const context = {
 		cookies: new AstroCookies(request),
 		request,
@@ -92,10 +91,7 @@ export function createAPIContext({
 
 type ResponseParameters = ConstructorParameters<typeof Response>;
 
-export let ResponseWithEncoding: ReturnType<typeof initResponseWithEncoding>;
-// TODO Remove this after StackBlitz supports Node 18.
-let initResponseWithEncoding = () => {
-	class LocalResponseWithEncoding extends Response {
+	export class ResponseWithEncoding extends Response {
 		constructor(
 			body: ResponseParameters[0],
 			init: ResponseParameters[1],
@@ -122,15 +118,6 @@ let initResponseWithEncoding = () => {
 		}
 	}
 
-	// Set the module scoped variable.
-	ResponseWithEncoding = LocalResponseWithEncoding;
-
-	// Turn this into a noop.
-	initResponseWithEncoding = (() => {}) as any;
-
-	return LocalResponseWithEncoding;
-};
-
 export async function callEndpoint<MiddlewareResult = Response | EndpointOutput>(
 	mod: EndpointHandler,
 	env: Environment,

packages/astro/src/core/polyfill.ts

@@ -1,63 +1,7 @@
 import crypto from 'node:crypto';
-import {
-	ByteLengthQueuingStrategy,
-	CountQueuingStrategy,
-	ReadableByteStreamController,
-	ReadableStream,
-	ReadableStreamBYOBReader,
-	ReadableStreamBYOBRequest,
-	ReadableStreamDefaultController,
-	ReadableStreamDefaultReader,
-	TransformStream,
-	WritableStream,
-	WritableStreamDefaultController,
-	WritableStreamDefaultWriter,
-} from 'node:stream/web';
-import { File, FormData, Headers, Request, Response, fetch } from 'undici';
-
-// NOTE: This file does not intend to polyfill everything that exists, its main goal is to make life easier
-// for users deploying to runtime that do support these features. In the future, we hope for this file to disappear.
-
-// HACK (2023-08-18) Stackblitz does not support Node 18 yet, so we'll fake Node 16 support for some time until it's supported
-// TODO: Remove when Node 18 is supported on Stackblitz. File should get imported from `node:buffer` instead of `undici` once this is removed
-const isStackblitz = process.env.SHELL === '/bin/jsh' && process.versions.webcontainer != null;
+import buffer from 'node:buffer';
 
 export function apply() {
-	if (isStackblitz) {
-		const neededPolyfills = {
-			ByteLengthQueuingStrategy,
-			CountQueuingStrategy,
-			ReadableByteStreamController,
-			ReadableStream,
-			ReadableStreamBYOBReader,
-			ReadableStreamBYOBRequest,
-			ReadableStreamDefaultController,
-			ReadableStreamDefaultReader,
-			TransformStream,
-			WritableStream,
-			WritableStreamDefaultController,
-			WritableStreamDefaultWriter,
-			File,
-			FormData,
-			Headers,
-			Request,
-			Response,
-			fetch,
-		};
-
-		for (let polyfillName of Object.keys(neededPolyfills)) {
-			if (Object.hasOwnProperty.call(globalThis, polyfillName)) continue;
-
-			// Add polyfill to globalThis
-			Object.defineProperty(globalThis, polyfillName, {
-				configurable: true,
-				enumerable: true,
-				writable: true,
-				value: neededPolyfills[polyfillName as keyof typeof neededPolyfills],
-			});
-		}
-	}
-
 	// Remove when Node 18 is dropped for Node 20
 	if (!globalThis.crypto) {
 		Object.defineProperty(globalThis, 'crypto', {
@@ -68,7 +12,7 @@ export function apply() {
 	// Remove when Node 18 is dropped for Node 20
 	if (!globalThis.File) {
 		Object.defineProperty(globalThis, 'File', {
-			value: File,
+			value: buffer.File,
 		});
 	}
 }

packages/astro/test/test-utils.js

@@ -170,7 +170,7 @@ export async function loadFixture(inlineConfig) {
 			try {
 				return await fetch(resolvedUrl, init);
 			} catch (err) {
-				// undici throws a vague error when it fails, so we log the url here to easily debug it
+				// node fetch throws a vague error when it fails, so we log the url here to easily debug it
 				if (err.message?.includes('fetch failed')) {
 					console.error(`[astro test] failed to fetch ${resolvedUrl}`);
 					console.error(err);

packages/integrations/node/package.json

@@ -49,8 +49,7 @@
     "cheerio": "1.0.0-rc.12",
     "express": "^4.18.2",
     "mocha": "^10.2.0",
-    "node-mocks-http": "^1.13.0",
-    "undici": "^5.23.0"
+    "node-mocks-http": "^1.13.0"
   },
   "publishConfig": {
     "provenance": true

packages/integrations/node/src/createOutgoingHttpHeaders.ts

@@ -8,15 +8,12 @@ import type { OutgoingHttpHeaders } from 'node:http';
  * @returns NodeJS OutgoingHttpHeaders object with multiple set-cookie handled as an array of values
  */
 export const createOutgoingHttpHeaders = (
-	webHeaders: Headers | undefined | null
+	headers: Headers | undefined | null
 ): OutgoingHttpHeaders | undefined => {
-	if (!webHeaders) {
+	if (!headers) {
 		return undefined;
 	}
-
-	// re-type to access Header.getSetCookie()
-	const headers = webHeaders as HeadersWithGetSetCookie;
-
+
 	// at this point, a multi-value'd set-cookie header is invalid (it was concatenated as a single CSV, which is not valid for set-cookie)
 	const nodeHeaders: OutgoingHttpHeaders = Object.fromEntries(headers.entries());
 
@@ -26,7 +23,8 @@ export const createOutgoingHttpHeaders = (
 
 	// if there is > 1 set-cookie header, we have to fix it to be an array of values
 	if (headers.has('set-cookie')) {
-		const cookieHeaders = headers.getSetCookie();
+		// @ts-expect-error
+		const cookieHeaders = headers.getSetCookie() as string[];
 		if (cookieHeaders.length > 1) {
 			// the Headers.entries() API already normalized all header names to lower case so we can safely index this as 'set-cookie'
 			nodeHeaders['set-cookie'] = cookieHeaders;
@@ -35,8 +33,3 @@ export const createOutgoingHttpHeaders = (
 
 	return nodeHeaders;
 };
-
-interface HeadersWithGetSetCookie extends Headers {
-	// the @astrojs/webapi polyfill makes this available (as of undici@5.19.0), but tsc doesn't pick it up on the built-in Headers type from DOM lib
-	getSetCookie(): string[];
-}

packages/telemetry/package.json

@@ -35,7 +35,6 @@
     "dset": "^3.1.2",
     "is-docker": "^3.0.0",
     "is-wsl": "^3.0.0",
-    "undici": "^5.23.0",
     "which-pm-runs": "^1.1.0"
   },
   "devDependencies": {

packages/telemetry/src/post.ts

@@ -1,5 +1,4 @@
 const ASTRO_TELEMETRY_ENDPOINT = `https://telemetry.astro.build/api/v1/record`;
-import { fetch } from 'undici';
 
 export function post(body: Record<string, any>): Promise<any> {
 	return fetch(ASTRO_TELEMETRY_ENDPOINT, {