Get tests passing again

modules/createServer.js

@@ -0,0 +1,49 @@
+import express from 'express';
+
+import serveFile from './actions/serveFile.js';
+import serveMainPage from './actions/serveMainPage.js';
+import serveStats from './actions/serveStats.js';
+
+import cors from './middleware/cors.js';
+import fetchPackage from './middleware/fetchPackage.js';
+import findFile from './middleware/findFile.js';
+import logger from './middleware/logger.js';
+import redirectLegacyURLs from './middleware/redirectLegacyURLs.js';
+import staticFiles from './middleware/staticFiles.js';
+import validatePackageURL from './middleware/validatePackageURL.js';
+import validatePackageName from './middleware/validatePackageName.js';
+import validateQuery from './middleware/validateQuery.js';
+
+export default function createServer() {
+  const app = express();
+
+  app.disable('x-powered-by');
+  app.enable('trust proxy');
+
+  app.use(logger);
+  app.use(cors);
+  app.use(staticFiles);
+
+  // Special startup request from App Engine
+  // https://cloud.google.com/appengine/docs/standard/nodejs/how-instances-are-managed
+  app.get('/_ah/start', (req, res) => {
+    res.status(200).end();
+  });
+
+  app.get('/', serveMainPage);
+  app.get('/api/stats', serveStats);
+
+  app.use(redirectLegacyURLs);
+
+  app.get(
+    '*',
+    validatePackageURL,
+    validatePackageName,
+    validateQuery,
+    fetchPackage,
+    findFile,
+    serveFile
+  );
+
+  return app;
+}