Express Middleware

내부 미들웨어

https://expressjs.com/en/4x/api.html#express

const options = {
  dotfiles: 'ignore',
  etag: false,
  index: false,
  maxAge: '1d',
  redirect: false,
  setHeaders: function (res, path, stat) {
    res.set('x-timestamp', Date.now());
  },
};

app.use(express.json()); // REST API -> Body
app.use(express.urlencoded({ extended: false })); // HTML Form -> Body
app.use(express.static('public', options));

외부 미들웨어

const corsOptions = {
  origin: ['http://127.0.0.1:5500'],
  optionsSuccessStatus: 200,
  credentials: true, // allow the Access-Control-Allow-Credentials
};

app.use(cookieParser());
app.use(helmet()); // 보안 헤더
app.use(cors(corsOptions));
app.use(morgan('combined')); // log