supporting a network address access a website when an user set host = true in Node environment

.changeset/soft-pianos-happen.md

@@ -0,0 +1,6 @@
+---
+'astro': minor
+'@astrojs/node': minor 
+---
+
+supporting a network address access a website when an user set host = true in Node environment

packages/astro/src/core/preview/get-network-address.ts

@@ -0,0 +1,13 @@
+import os from 'os'
+export function getNetworkAddress(){
+  const interfaces = os.networkInterfaces();
+    const ips: string[] = [];
+    Object.keys(interfaces).forEach((nic) => {
+        interfaces[nic]!.forEach((details) => {
+            if (details.family === 'IPv4' && !details.internal) {
+                ips.push(details.address);
+            }
+        });
+    });
+    return ips?.[0] ? ips?.[0] : '127.0.0.1';
+}

packages/astro/src/core/preview/util.ts

@@ -1,10 +1,12 @@
+import { getNetworkAddress } from './get-network-address.js'
+
 export function getResolvedHostForHttpServer(host: string | boolean) {
 	if (host === false) {
 		// Use a secure default
 		return 'localhost';
 	} else if (host === true) {
 		// If passed --host in the CLI without arguments
-		return undefined; // undefined typically means 0.0.0.0 or :: (listen on all IPs)
+		return getNetworkAddress(); // undefined typically means 0.0.0.0 or :: (listen on all IPs)
 	} else {
 		return host;
 	}
@@ -17,3 +19,4 @@ export function stripBase(path: string, base: string): string {
 	const baseWithSlash = base.endsWith('/') ? base : base + '/';
 	return path.replace(RegExp('^' + baseWithSlash), '/');
 }
+

packages/integrations/node/src/get-network-address.ts

@@ -0,0 +1,13 @@
+import os from 'os'
+export function getNetworkAddress(){
+  const interfaces = os.networkInterfaces();
+    const ips: string[] = [];
+    Object.keys(interfaces).forEach((nic) => {
+        interfaces[nic]!.forEach((details) => {
+            if (details.family === 'IPv4' && !details.internal) {
+                ips.push(details.address);
+            }
+        });
+    });
+    return ips?.[0] ? ips?.[0] : '127.0.0.1';
+}

packages/integrations/node/src/standalone.ts

@@ -4,6 +4,7 @@ import path from 'node:path';
 import { fileURLToPath } from 'node:url';
 import { createServer } from './http-server.js';
 import middleware from './nodeMiddleware.js';
+import { getNetworkAddress } from './get-network-address.js'
 import type { Options } from './types';
 
 function resolvePaths(options: Options) {
@@ -29,7 +30,7 @@ export function getResolvedHostForHttpServer(host: string | boolean) {
 		return '127.0.0.1';
 	} else if (host === true) {
 		// If passed --host in the CLI without arguments
-		return undefined; // undefined typically means 0.0.0.0 or :: (listen on all IPs)
+		return getNetworkAddress(); // undefined typically means 0.0.0.0 or :: (listen on all IPs)
 	} else {
 		return host;
 	}

packages/integrations/node/test/url-protocol.test.js

@@ -9,6 +9,9 @@ describe('URL protocol', () => {
 
 	before(async () => {
 		fixture = await loadFixture({
+			server: {
+				host: true
+		},
 			root: './fixtures/url-protocol/',
 			output: 'server',
 			adapter: nodejs({ mode: 'standalone' }),
@@ -16,6 +19,19 @@ describe('URL protocol', () => {
 		await fixture.build();
 	});
 
+	describe('test preview when host is true', async () => {
+		let devPreview;
+
+		before(async () => {
+			devPreview = await fixture.preview();
+			
+		});
+		it('test host is true ', () => {
+			const host = devPreview.host
+			const ishost = () => host.startsWith('127') ||  host.startsWith('loc')
+			expect(!ishost()).eq(true)
+		});
+	})
 	it('return http when non-secure', async () => {
 		const { handler } = await import('./fixtures/url-protocol/dist/server/entry.mjs');
 		let { req, res, text } = createRequestAndResponse({