feat(cors): add cors middleware

Author: wbhob

src/cors/index.spec.ts

@@ -0,0 +1,22 @@
+import { CorsMiddleware } from './index';
+import { expect } from 'chai';
+
+describe('CorsMiddleware', () => {
+    let middleware: CorsMiddleware;
+
+    beforeEach(() => {
+        middleware = new CorsMiddleware();
+    });
+
+    it('should be defined', () => {
+        expect(middleware).to.not.be.undefined;
+    });
+
+    it('should have a function called resolve', () => {
+        expect(middleware.resolve).to.be.instanceof(Function);
+    });
+
+    it('should should return a middleware from calling resolve', () => {
+        expect(middleware.resolve()).to.be.an.instanceof(Function);
+    });
+});

src/cors/index.ts

@@ -0,0 +1,24 @@
+import * as cors from 'cors';
+
+import { Middleware, NestMiddleware } from '@nestjs/common';
+
+import { RequestHandler } from 'express';
+
+@Middleware()
+export class CorsMiddleware implements NestMiddleware {
+
+    public static configure(opts: cors.CorsOptions) {
+        this.options = opts;
+    }
+
+    private static options: cors.CorsOptions;
+
+
+    public resolve(...args: any[]) {
+        if (CorsMiddleware.options) {
+            return cors(CorsMiddleware.options);
+        } else {
+            return cors();
+        }
+    }
+}

src/cors/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "@nest-middlewares/cors",
+  "version": "1.0.0",
+  "description": "NestJS middleware for Helmet",
+  "main": "index",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/wbhob/nest-middlewares.git"
+  },
+  "keywords": [
+    "nest",
+    "middlewares",
+    "express",
+    "node"
+  ],
+  "author": "Wilson Hobbs <wilsonhobbs1@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/wbhob/nest-middlewares/issues"
+  },
+  "homepage": "https://github.com/wbhob/nest-middlewares#readme",
+  "dependencies": {
+    "cors": "^2.8.4"
+  },
+  "peerDependencies": {
+    "@nestjs/common": "^4.0.0"
+  }
+}