Bugfix/fix issue with serving Storybook related to contentSecurityPolicy (#4437)

* Fix issue with serving Storybook related to contentSecurityPolicy

* Update changelog

CHANGELOG.md

@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Upgraded `angular` from version `19.0.5` to `19.2.1`
 - Upgraded `Nx` from version `20.3.2` to `20.5.0`
 
+### Fixed
+
+- Fixed an issue with serving _Storybook_ related to the `contentSecurityPolicy`
+
 ## 2.145.1 - 2025-03-10
 
 ### Added

apps/api/src/main.ts

@@ -1,3 +1,5 @@
+import { STORYBOOK_PATH } from '@ghostfolio/common/config';
+
 import {
   Logger,
   LogLevel,
@@ -7,6 +9,7 @@ import {
 import { ConfigService } from '@nestjs/config';
 import { NestFactory } from '@nestjs/core';
 import type { NestExpressApplication } from '@nestjs/platform-express';
+import { NextFunction, Request, Response } from 'express';
 import helmet from 'helmet';
 
 import { AppModule } from './app/app.module';
@@ -50,7 +53,10 @@ async function bootstrap() {
   app.useBodyParser('json', { limit: '10mb' });
 
   if (configService.get<string>('ENABLE_FEATURE_SUBSCRIPTION') === 'true') {
-    app.use(
+    app.use((req: Request, res: Response, next: NextFunction) => {
+      if (req.path.startsWith(STORYBOOK_PATH)) {
+        next();
+      } else {
         helmet({
           contentSecurityPolicy: {
             directives: {
@@ -62,8 +68,9 @@ async function bootstrap() {
             }
           },
           crossOriginOpenerPolicy: false // Disable Cross-Origin-Opener-Policy header (for Internet Identity)
-      })
-    );
+        })(req, res, next);
+      }
+    });
   }
 
   app.use(HtmlTemplateMiddleware);

apps/api/src/middlewares/html-template.middleware.ts

@@ -3,6 +3,7 @@ import { I18nService } from '@ghostfolio/api/services/i18n/i18n.service';
 import {
   DEFAULT_LANGUAGE_CODE,
   DEFAULT_ROOT_URL,
+  STORYBOOK_PATH,
   SUPPORTED_LANGUAGE_CODES
 } from '@ghostfolio/common/config';
 import { DATE_FORMAT, interpolate } from '@ghostfolio/common/helper';
@@ -129,7 +130,7 @@ export const HtmlTemplateMiddleware = async (
 
   if (
     path.startsWith('/api/') ||
-    path.startsWith('/development/storybook') ||
+    path.startsWith(STORYBOOK_PATH) ||
     isFileRequest(path) ||
     !environment.production
   ) {

libs/common/src/lib/config.ts

@@ -153,6 +153,8 @@ export const REPLACE_NAME_PARTS = [
   'Xtrackers (IE) Plc -'
 ];
 
+export const STORYBOOK_PATH = '/development/storybook';
+
 export const SUPPORTED_LANGUAGE_CODES = [
   'ca',
   'de',