Revert #12173

.changeset/gold-masks-trade.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Reverts https://github.com/withastro/astro/pull/12173 which caused `Can't modify immutable headers` warnings and 500 errors on Cloudflare Pages

packages/astro/e2e/actions-blog.test.js

@@ -136,7 +136,8 @@ test.describe('Astro Actions - Blog', () => {
 		await expect(page).toHaveURL(astro.resolveUrl('/blog/'));
 	});
 
-	test('Should redirect to the origin pathname when there is a rewrite', async ({
+	// TODO: fix regression #12201 and #12202
+	test.skip('Should redirect to the origin pathname when there is a rewrite', async ({
 		page,
 		astro,
 	}) => {

packages/astro/src/actions/runtime/middleware.ts

@@ -1,8 +1,6 @@
 import { yellow } from 'kleur/colors';
 import type { APIContext, MiddlewareNext } from '../../@types/astro.js';
-import { ASTRO_ORIGIN_HEADER } from '../../core/constants.js';
 import { defineMiddleware } from '../../core/middleware/index.js';
-import { getOriginHeader } from '../../core/routing/rewrite.js';
 import { ACTION_QUERY_PARAMS } from '../consts.js';
 import { formContentTypes, hasContentType } from './utils.js';
 import { getAction } from './virtual/get-action.js';
@@ -137,11 +135,6 @@ async function redirectWithResult({
 		return context.redirect(referer);
 	}
 
-	const referer = getOriginHeader(context.request);
-	if (referer) {
-		return context.redirect(referer);
-	}
-
 	return context.redirect(context.url.pathname);
 }
 

packages/astro/src/core/constants.ts

@@ -28,11 +28,6 @@ export const REROUTE_DIRECTIVE_HEADER = 'X-Astro-Reroute';
  * This metadata is used to determine the origin of a Response. If a rewrite has occurred, it should be prioritised over other logic.
  */
 export const REWRITE_DIRECTIVE_HEADER_KEY = 'X-Astro-Rewrite';
-
-/**
- * Header used to track the original URL requested by the user. This information is useful rewrites are involved.
- */
-export const ASTRO_ORIGIN_HEADER = 'X-Astro-Origin';
 export const REWRITE_DIRECTIVE_HEADER_VALUE = 'yes';
 
 /**

packages/astro/src/core/middleware/sequence.ts

@@ -2,7 +2,6 @@ import type { APIContext, MiddlewareHandler, RewritePayload } from '../../@types
 import { AstroCookies } from '../cookies/cookies.js';
 import { apiContextRoutesSymbol } from '../render-context.js';
 import { type Pipeline, getParams } from '../render/index.js';
-import { copyRequest } from '../routing/rewrite.js';
 import { defineMiddleware } from './index.js';
 
 // From SvelteKit: https://github.com/sveltejs/kit/blob/master/packages/kit/src/exports/hooks/sequence.js
@@ -37,9 +36,9 @@ export function sequence(...handlers: MiddlewareHandler[]): MiddlewareHandler {
 						if (payload instanceof Request) {
 							newRequest = payload;
 						} else if (payload instanceof URL) {
-							newRequest = copyRequest(payload, handleContext.request);
+							newRequest = new Request(payload, handleContext.request);
 						} else {
-							newRequest = copyRequest(
+							newRequest = new Request(
 								new URL(payload, handleContext.url.origin),
 								handleContext.request,
 							);

packages/astro/src/core/render-context.ts

@@ -20,7 +20,6 @@ import {
 import { renderEndpoint } from '../runtime/server/endpoint.js';
 import { renderPage } from '../runtime/server/index.js';
 import {
-	ASTRO_ORIGIN_HEADER,
 	ASTRO_VERSION,
 	REROUTE_DIRECTIVE_HEADER,
 	REWRITE_DIRECTIVE_HEADER_KEY,
@@ -37,7 +36,6 @@ import { callMiddleware } from './middleware/callMiddleware.js';
 import { sequence } from './middleware/index.js';
 import { renderRedirect } from './redirects/render.js';
 import { type Pipeline, Slots, getParams, getProps } from './render/index.js';
-import { copyRequest, setOriginHeader } from './routing/rewrite.js';
 
 export const apiContextRoutesSymbol = Symbol.for('context.routes');
 
@@ -83,7 +81,6 @@ export class RenderContext {
 			Pick<RenderContext, 'locals' | 'middleware' | 'status' | 'props'>
 		>): Promise<RenderContext> {
 		const pipelineMiddleware = await pipeline.getMiddleware();
-		setOriginHeader(request, pathname);
 		return new RenderContext(
 			pipeline,
 			locals,
@@ -156,7 +153,7 @@ export class RenderContext {
 				if (payload instanceof Request) {
 					this.request = payload;
 				} else {
-					this.request = copyRequest(newUrl, this.request);
+					this.request = this.#copyRequest(newUrl, this.request);
 				}
 				this.isRewriting = true;
 				this.url = new URL(this.request.url);
@@ -256,7 +253,7 @@ export class RenderContext {
 		if (reroutePayload instanceof Request) {
 			this.request = reroutePayload;
 		} else {
-			this.request = copyRequest(newUrl, this.request);
+			this.request = this.#copyRequest(newUrl, this.request);
 		}
 		this.url = new URL(this.request.url);
 		this.cookies = new AstroCookies(this.request);
@@ -564,4 +561,33 @@ export class RenderContext {
 		if (!i18n) return;
 		return (this.#preferredLocaleList ??= computePreferredLocaleList(request, i18n.locales));
 	}
+
+	/**
+	 * Utility function that creates a new `Request` with a new URL from an old `Request`.
+	 *
+	 * @param newUrl The new `URL`
+	 * @param oldRequest The old `Request`
+	 */
+	#copyRequest(newUrl: URL, oldRequest: Request): Request {
+		if (oldRequest.bodyUsed) {
+			throw new AstroError(AstroErrorData.RewriteWithBodyUsed);
+		}
+		return new Request(newUrl, {
+			method: oldRequest.method,
+			headers: oldRequest.headers,
+			body: oldRequest.body,
+			referrer: oldRequest.referrer,
+			referrerPolicy: oldRequest.referrerPolicy,
+			mode: oldRequest.mode,
+			credentials: oldRequest.credentials,
+			cache: oldRequest.cache,
+			redirect: oldRequest.redirect,
+			integrity: oldRequest.integrity,
+			signal: oldRequest.signal,
+			keepalive: oldRequest.keepalive,
+			// https://fetch.spec.whatwg.org/#dom-request-duplex
+			// @ts-expect-error It isn't part of the types, but undici accepts it and it allows to carry over the body to a new request
+			duplex: 'half',
+		});
+	}
 }

packages/astro/src/core/routing/rewrite.ts

@@ -1,7 +1,5 @@
 import type { AstroConfig, RewritePayload, RouteData } from '../../@types/astro.js';
 import { shouldAppendForwardSlash } from '../build/util.js';
-import { ASTRO_ORIGIN_HEADER } from '../constants.js';
-import { AstroError, AstroErrorData } from '../errors/index.js';
 import { appendForwardSlash, removeTrailingForwardSlash } from '../path.js';
 import { DEFAULT_404_ROUTE } from './astro-designed-error-pages.js';
 
@@ -72,44 +70,3 @@ export function findRouteToRewrite({
 		}
 	}
 }
-
-/**
- * Utility function that creates a new `Request` with a new URL from an old `Request`.
- *
- * @param newUrl The new `URL`
- * @param oldRequest The old `Request`
- */
-export function copyRequest(newUrl: URL, oldRequest: Request): Request {
-	if (oldRequest.bodyUsed) {
-		throw new AstroError(AstroErrorData.RewriteWithBodyUsed);
-	}
-	return new Request(newUrl, {
-		method: oldRequest.method,
-		headers: oldRequest.headers,
-		body: oldRequest.body,
-		referrer: oldRequest.referrer,
-		referrerPolicy: oldRequest.referrerPolicy,
-		mode: oldRequest.mode,
-		credentials: oldRequest.credentials,
-		cache: oldRequest.cache,
-		redirect: oldRequest.redirect,
-		integrity: oldRequest.integrity,
-		signal: oldRequest.signal,
-		keepalive: oldRequest.keepalive,
-		// https://fetch.spec.whatwg.org/#dom-request-duplex
-		// @ts-expect-error It isn't part of the types, but undici accepts it and it allows to carry over the body to a new request
-		duplex: 'half',
-	});
-}
-
-export function setOriginHeader(request: Request, pathname: string): void {
-	request.headers.set(ASTRO_ORIGIN_HEADER, encodeURIComponent(pathname));
-}
-
-export function getOriginHeader(request: Request): string | undefined {
-	const origin = request.headers.get(ASTRO_ORIGIN_HEADER);
-	if (origin) {
-		return decodeURIComponent(origin);
-	}
-	return undefined;
-}