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fix: injecting app mode

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Signed-off-by: Camila Belo <camilaibs@gmail.com>
This commit is contained in:
Camila Belo
2024-04-05 15:49:18 +02:00
committed by Patrik Oldsberg
parent dde4707df6
commit 721359b950
1 changed files with 30 additions and 13 deletions
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plugins/app-backend/src/service/router.ts
+30 -13
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@@ -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(
/<head>/,
`<head><meta name="backstage-app-mode" content="${appMode}" />`,
);
await fs.writeFile(
resolvePath(rootDir, 'index.html'),
modifiedIndexHtmlContent,
'utf8',
);
}
async function createEntryPointRouter({
logger,
rootDir,
@@ -261,6 +282,8 @@ async function createEntryPointRouter({
await injectConfig({ appConfigs, logger, staticDir });
}
await injectAppMode({ appMode, rootDir });
const router = Router();
// Use a separate router for static content so that a fallback can be provided by backend
@@ -306,20 +329,14 @@ async function createEntryPointRouter({
}),
);
const indexHtmlContent = Buffer.from(
(await fs.readFile(resolvePath(rootDir, 'index.html'), 'utf8')).replace(
/<head>/,
`<head><meta name="backstage-app-mode" content="${appMode}" />`,
),
'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;