feat: Set up server using express

src/server/ExpressHttpServer.ts

@@ -0,0 +1,28 @@
+import cors from 'cors';
+import express from 'express';
+import { HttpHandler } from './HttpHandler';
+import { Server } from 'http';
+
+export class ExpressHttpServer {
+  private readonly handler: HttpHandler;
+
+  public constructor(handler: HttpHandler) {
+    this.handler = handler;
+  }
+
+  public listen(port?: number): Server {
+    const app = express();
+
+    app.use(cors({
+      // Based on https://github.com/solid/solid-spec/blob/master/recommendations-server.md#cors---cross-origin-resource-sharing
+      // By default origin is always '*', this forces it to be the origin header if there is one
+      origin: (origin, callback): void => callback(null, (origin || '*') as any),
+      methods: [ 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT', 'PATCH', 'DELETE' ],
+    }));
+
+    app.use(async(request, response): Promise<void> => {
+      await this.handler.handleSafe({ request, response });
+    });
+    return app.listen(port);
+  }
+}