diff --git a/plugins/app-backend/src/service/router.ts b/plugins/app-backend/src/service/router.ts
index 574e13db97..dc51499d74 100644
--- a/plugins/app-backend/src/service/router.ts
+++ b/plugins/app-backend/src/service/router.ts
@@ -238,6 +238,27 @@ export async function createRouter(
return router;
}
+async function injectAppMode(options: {
+ appMode: 'public' | 'protected';
+ rootDir: string;
+}) {
+ const { appMode, rootDir } = options;
+ const originalIndexHtmlContent = await fs.readFile(
+ resolvePath(rootDir, 'index.html'),
+ 'utf8',
+ );
+ if (originalIndexHtmlContent.includes('backstage-app-mode')) return;
+ const modifiedIndexHtmlContent = originalIndexHtmlContent.replace(
+ //,
+ ``,
+ );
+ await fs.writeFile(
+ resolvePath(rootDir, 'index.html'),
+ modifiedIndexHtmlContent,
+ 'utf8',
+ );
+}
+
async function createEntryPointRouter({
logger,
rootDir,
@@ -261,6 +282,8 @@ async function createEntryPointRouter({
await injectConfig({ appConfigs, logger, staticDir });
}
+ await injectAppMode({ appMode, rootDir });
+
const router = Router();
// Use a separate router for static content so that a fallback can be provided by backend
@@ -306,20 +329,14 @@ async function createEntryPointRouter({
}),
);
- const indexHtmlContent = Buffer.from(
- (await fs.readFile(resolvePath(rootDir, 'index.html'), 'utf8')).replace(
- //,
- ``,
- ),
- 'utf8',
- );
-
router.get('/*', (_req, res) => {
- // The Cache-Control header instructs the browser to not cache the index.html since it might
- // link to static assets from recently deployed versions.
- res.setHeader('Cache-Control', CACHE_CONTROL_NO_CACHE);
- res.setHeader('Content-Type', 'text/html;charset=utf-8');
- res.send(indexHtmlContent);
+ res.sendFile(resolvePath(rootDir, 'index.html'), {
+ headers: {
+ // The Cache-Control header instructs the browser to not cache the index.html since it might
+ // link to static assets from recently deployed versions.
+ 'cache-control': CACHE_CONTROL_NO_CACHE,
+ },
+ });
});
return router;