Introduce redirect endpoint for login redirects

spec/redirect_test.js

+import request from 'supertest'
+import { generateSimpleViteManifest, mockConfig, mockFetch, mockApp } from './util.js'
+import { expect } from 'chai'
+import * as td from 'testdouble'
+
+describe('Redirects', function () {
+  let app
+
+  before(async function () {
+    mockConfig({ urls: ['http://ui-server/'] })
+    mockFetch({
+      'http://ui-server': {
+        '/manifest.json': generateSimpleViteManifest({ 'example.js': 'test' }),
+        '/example.js': ''
+      }
+    })
+    app = await mockApp()
+  })
+
+  after(function () {
+    td.reset()
+  })
+
+  it('without requested location', async function () {
+    const response = await request(app).post('/redirect')
+    expect(response.statusCode).to.equal(302)
+    expect(response.headers.location).to.equal('../busy.html')
+  })
+
+  it('with requested location', async function () {
+    const response = await request(app).post('/redirect').send('location=/appsuite/whatever/path')
+    expect(response.statusCode).to.equal(302)
+    expect(response.headers.location).to.equal('/appsuite/whatever/path')
+  })
+})

src/createApp.js

@@ -35,6 +35,7 @@ export function createApp () {
   // The app returned by express() is in fact a JavaScript Function, designed to be passed to Node’s HTTP servers as a callback to handle requests.
 
   const app = express()
+  app.use(express.urlencoded({ extended: true }))
 
   const healthCheck = new health.HealthChecker()
   const startupCheck = new health.StartupCheck('warmup cache', async function () {
@@ -109,6 +110,11 @@ export function createApp () {
     next()
   })
 
+  app.post('/redirect', (req, res, next) => {
+    const location = req.body.location || '../busy.html'
+    res.redirect(location)
+  })
+
   app.use(async (req, res, next) => {
     const { 'content-type': contentType, content } = fileCache.get(req.path)
     if (content) {