feat(server): create client-version-check route [WPB-23299]

apps/server/Server.ts

@@ -17,7 +17,7 @@
  *
  */
 
-import express from 'express';
+import express, {Router} from 'express';
 import expressSitemapXml from 'express-sitemap-xml';
 import hbs from 'hbs';
 import helmet from 'helmet';
@@ -30,8 +30,10 @@ import https from 'https';
 import path from 'path';
 
 import type {ClientConfig, ServerConfig} from '@wireapp/config';
+
 import {HealthCheckRoute} from './routes/_health/HealthRoute';
 import {AppleAssociationRoute} from './routes/appleassociation/AppleAssociationRoute';
+import {createClientVersionCheckRoute} from './routes/client-version-check/ClientVersionCheckRoute';
 import {ConfigRoute} from './routes/config/ConfigRoute';
 import {InternalErrorRoute, NotFoundRoute} from './routes/error/ErrorRoutes';
 import {GoogleWebmasterRoute} from './routes/googlewebmaster/GoogleWebmasterRoute';
@@ -67,7 +69,7 @@ class Server {
     this.initStaticRoutes();
     this.initWebpack();
     this.initSiteMap(this.config);
-    // eslint-disable-next-line import/no-named-as-default-member
+
     this.app.use('/libs', express.static(path.join(__dirname, 'libs')));
     this.app.use(Root());
     this.app.use(HealthCheckRoute());
@@ -76,6 +78,7 @@ class Server {
     this.app.use(AppleAssociationRoute());
     this.app.use(NotFoundRoute());
     this.app.use(InternalErrorRoute());
+    this.app.use(createClientVersionCheckRoute({router: Router()}));
   }
 
   private initWebpack() {
@@ -170,7 +173,6 @@ class Server {
     const staticRoutes = ['audio', 'ext', 'font', 'image', 'min', 'proto', 'style', 'worker', 'assets'];
 
     staticRoutes.forEach(route => {
-      // eslint-disable-next-line import/no-named-as-default-member
       this.app.use(`/${route}`, express.static(path.join(__dirname, `static/${route}`)));
     });
 

apps/server/routes/client-version-check/ClientVersionCheckRoute.test.ts

@@ -0,0 +1,31 @@
+import {Router, type Response} from 'express';
+import {createClientVersionCheckRoute} from './ClientVersionCheckRoute';
+
+describe('/client-version-check', () => {
+  it('listens on /client-version-check path', async () => {
+    const fakeGet = jest.fn();
+
+    const fakeRouter = {
+      get: fakeGet,
+    } as unknown as Router;
+
+    createClientVersionCheckRoute({router: fakeRouter});
+
+    expect(fakeGet).toHaveBeenNthCalledWith(1, '/client-version-check', expect.any(Function));
+  });
+
+  it('returns HTTP 200', async () => {
+    const sendStatus = jest.fn();
+    const fakeResponse = {sendStatus} as unknown as Response;
+
+    const fakeRouter = {
+      get: jest.fn((_routePath, routeHandler) => {
+        routeHandler(undefined, fakeResponse);
+      }),
+    } as unknown as Router;
+
+    createClientVersionCheckRoute({router: fakeRouter});
+
+    expect(sendStatus).toHaveBeenNthCalledWith(1, 200);
+  });
+});

apps/server/routes/client-version-check/ClientVersionCheckRoute.ts

@@ -0,0 +1,33 @@
+/*
+ * Wire
+ * Copyright (C) 2026 Wire Swiss GmbH
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see http://www.gnu.org/licenses/.
+ *
+ */
+
+import {Router} from 'express';
+import {StatusCodes as HTTP_STATUS} from 'http-status-codes';
+
+type ClientVersionCheckRouteDependencies = {
+  readonly router: ReturnType<typeof Router>;
+};
+
+export function createClientVersionCheckRoute(dependencies: ClientVersionCheckRouteDependencies) {
+  const {router} = dependencies;
+
+  return router.get('/client-version-check', (request, response) => {
+    return response.sendStatus(HTTP_STATUS.OK);
+  });
+}