fix: support HTTP/2 in astro dev

.changeset/six-fans-kiss.md

@@ -0,0 +1,7 @@
+---
+'astro': patch
+---
+
+Fixes an issue that would break `Astro.request.url` and `Astro.request.headers` in `astro dev` if HTTP/2 was enabled.
+
+HTTP/2 is now enabled by default in `astro dev` if `https` is configured in the Vite config.

packages/astro/package.json

@@ -229,6 +229,7 @@
     "rollup": "^4.18.0",
     "sass": "^1.77.5",
     "srcset-parse": "^1.1.0",
+    "undici": "^6.19.2",
     "unified": "^11.0.4"
   },
   "engines": {

packages/astro/src/core/create-vite.ts

@@ -173,10 +173,6 @@ export async function createVite(
 				process.env.NODE_ENV === 'test' || process.env.NODE_ENV === 'production'
 					? false
 					: undefined, // disable HMR for test
-			// handle Vite URLs
-			proxy: {
-				// add proxies here
-			},
 			watch: {
 				// Prevent watching during the build to speed it up
 				ignored: mode === 'build' ? ['**'] : undefined,

packages/astro/src/core/request.ts

@@ -50,7 +50,10 @@ export function createRequest({
 		? undefined
 		: headers instanceof Headers
 			? headers
-			: new Headers(Object.entries(headers as Record<string, any>));
+			: new Headers(
+					// Filter out H2 pseudo-headers, as these can't be created with Headers
+					Object.entries(headers as Record<string, any>).filter(([name]) => !name.startsWith(':'))
+				);
 
 	if (typeof url === 'string') url = new URL(url);
 

packages/astro/src/vite-plugin-astro-server/request.ts

@@ -25,7 +25,9 @@ export async function handleRequest({
 	incomingResponse,
 }: HandleRequest) {
 	const { config, loader } = pipeline;
-	const origin = `${loader.isHttps() ? 'https' : 'http'}://${incomingRequest.headers.host}`;
+	const origin = `${loader.isHttps() ? 'https' : 'http'}://${
+		incomingRequest.headers[':authority'] ?? incomingRequest.headers.host
+	}`;
 
 	const url = new URL(origin + incomingRequest.url);
 	let pathname: string;

packages/astro/test/astro-dev-http2.test.js

@@ -0,0 +1,37 @@
+import assert from 'node:assert/strict';
+import { after, before, describe, it } from 'node:test';
+import * as cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Astro HTTP/2 support', () => {
+	let fixture;
+	let devServer;
+
+	before(async () => {
+		fixture = await loadFixture({
+			root: './fixtures/astro-dev-http2/',
+		});
+		devServer = await fixture.startDevServer();
+	});
+
+	after(async () => {
+		await devServer.stop();
+	});
+
+	describe('dev', () => {
+		it('returns custom headers for valid URLs', async () => {
+			const result = await fixture.fetch('/');
+			assert.equal(result.status, 200);
+			const html = await result.text();
+			console.log(result.headers);
+			const $ = cheerio.load(html);
+			const urlString = $('main').text();
+			assert.equal(Boolean(urlString), true);
+			const url = new URL(urlString);
+			// Not asserting host because of all the ways localhost can be represented
+			assert.equal(url.protocol, 'https:');
+			assert.equal(url.port, '4321');
+			assert.equal($('p').text(), '2.0');
+		});
+	});
+});

packages/astro/test/fixtures/astro-dev-http2/.cert/cert.pem

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
+MIIEHDCCAoSgAwIBAgIRAIWPzjvpgZGzQqe1TFcdGmAwDQYJKoZIhvcNAQELBQAw
+ZTEeMBwGA1UEChMVbWtjZXJ0IGRldmVsb3BtZW50IENBMR0wGwYDVQQLDBRhbGV4
+QERFU0tUT1AtMFM5OFUzMDEkMCIGA1UEAwwbbWtjZXJ0IGFsZXhAREVTS1RPUC0w
+Uzk4VTMwMB4XDTI0MDIyNjAwNDkyOVoXDTI2MDUyNTIzNDkyOVowSDEnMCUGA1UE
+ChMebWtjZXJ0IGRldmVsb3BtZW50IGNlcnRpZmljYXRlMR0wGwYDVQQLDBRhbGV4
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+F1aLH8yHubZ1LJkIczAypcryekmk+VzTsNdv1aKelhsZ9QJUxg/NsrMXe5DZ9Eeu
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+ZnSa7xEv7fGDTcn9oKFc1fc1BnCy4qCHkxF8pIeXbXEZ/q1fqNNtp87/PigPT7YO
+ppcYvEsj4Y+6yuDfIrWAZNcbtiOfFUyPXy1KN+/VxZhcZ/MuAbl4EiESDFbE5j8U
+whIHlRXUY6B09PL9NVNGyjNDH3NMQkSKVFA2KVeaFeDIROjPeMkrKY56lWVpEiru
+HVLuFVpM27uJEKgSNeAYttfOEvsvr20Otmt29Uu59qfX+w0crQUEElcUJB4DgRH+
+NVoYZLYMm88B5aVUsmwkkrJJrAJ+M6UnzIhdN2alJxXojW38jDWzn+dWbc0a2hIB
+-----END CERTIFICATE-----

packages/astro/test/fixtures/astro-dev-http2/.cert/key.pem

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+t+Hgx8aToIpB0tz/3CTea5HGK8FvX6t5QKDL6XqDrRGO1FVdMSWl9WLfmpTynJdj
+sNHr7JFwNPsCgYAz5OE/ekoYK7z3hzz8OHyZwa5hCAWtWSEfSM9y7YSTCI/NGIOn
+8eoUqqm2G5iUVYFDDjkt75nEy06EPDG0YZKHunnhbD7oL4pxIGykHy4poj1pwJXu
+a5vi4264SMhmPfW02rNN2/Cj5w11cgAvCxt3NlMei4fSreAr3wGVTEtHJwKBgEBw
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+TdXSylFz+QBwelSLJFjfTwygElpjQF+HpIkRSWTTAoGBAJIqeQ4edg4weut00+32
+A8rQEpiz5SByPYNUPCI5BReKd+/Dw2QdXnfJNVg7/NFfuUdvPVkmptsisYdfWhlp
+y+KFAwdbgDUU+ruPuv5fHU4sA85Uuxazr/YXZIB6wmsQKt8cNezqNhjY6UovTOdZ
+7qnkPUO8VGcnrRZiav8WIevg
+-----END PRIVATE KEY-----

packages/astro/test/fixtures/astro-dev-http2/astro.config.ts

@@ -0,0 +1,26 @@
+import { defineConfig } from "astro/config";
+import { readFileSync } from "fs";
+// https://astro.build/config
+export default defineConfig({
+	output: "hybrid",
+  vite: {
+    server: {
+      https: {
+        key: readFileSync(new URL(".cert/key.pem", import.meta.url)),
+        cert: readFileSync(new URL(".cert/cert.pem", import.meta.url)),
+      },
+    },
+		plugins: [
+			{
+				name: 'http-version-plugin',
+				// This plugin allows tests to track the version of HTTP used in the request
+					configureServer: (server) => {
+						server.middlewares.use((req, res, next) => {
+							req.headers['x-http-version'] = req.httpVersion;
+							next();
+						});
+					}
+			},
+		],
+  },
+});

packages/astro/test/fixtures/astro-dev-http2/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "@test/astro-dev-http2",
+  "version": "0.0.1",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*"
+  }
+}

packages/astro/test/fixtures/astro-dev-http2/src/pages/index.astro

@@ -0,0 +1,17 @@
+---
+const url = Astro.request.url
+const httpVersion = Astro.request.headers.get('x-http-version')
+export const prerender = false
+---
+
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width" />
+    <link rel="icon" type="image/x-icon" href="/favicon.ico" />
+  </head>
+  <body>
+    <main>{url}</main>
+		<p>{httpVersion}</p>
+  </body>
+</html>

packages/astro/test/test-utils.js

@@ -5,6 +5,7 @@ import { fileURLToPath } from 'node:url';
 import { execa } from 'execa';
 import fastGlob from 'fast-glob';
 import stripAnsi from 'strip-ansi';
+import { Agent } from 'undici';
 import { check } from '../dist/cli/check/index.js';
 import build from '../dist/core/build/index.js';
 import { RESOLVED_SPLIT_MODULE_ID } from '../dist/core/build/plugins/plugin-ssr.js';
@@ -122,8 +123,13 @@ export async function loadFixture(inlineConfig) {
 	// Load the config.
 	const { astroConfig: config } = await resolveConfig(inlineConfig, 'dev');
 
+	const protocol = config.vite?.server?.https ? 'https' : 'http';
+
 	const resolveUrl = (url) =>
-		`http://${config.server.host || 'localhost'}:${config.server.port}${url.replace(/^\/?/, '/')}`;
+		`${protocol}://${config.server.host || 'localhost'}:${config.server.port}${url.replace(
+			/^\/?/,
+			'/'
+		)}`;
 
 	// A map of files that have been edited.
 	let fileEdits = new Map();
@@ -171,6 +177,17 @@ export async function loadFixture(inlineConfig) {
 		config,
 		resolveUrl,
 		fetch: async (url, init) => {
+			if (config.vite?.server?.https) {
+				init = {
+					dispatcher: new Agent({
+						connect: {
+							rejectUnauthorized: false,
+						},
+						allowH2: true,
+					}),
+					...init,
+				};
+			}
 			const resolvedUrl = resolveUrl(url);
 			try {
 				return await fetch(resolvedUrl, init);