app.js

const path = require('path');
const express = require('express');
const morgan = require('morgan');
const rateLimit = require('express-rate-limit');
const helmet = require('helmet');
const mongoSanitize = require('express-mongo-sanitize');
const xss = require('xss-clean');
const hpp = require('hpp');
const cookieParser = require('cookie-parser');
const cors = require('cors');
const compression = require('compression');
const AppError = require('./utils/appError');
const globalErrorHandler = require('./controllers/errorController');
const tourRouter = require('./routes/tourRoutes');
const userRouter = require('./routes/userRoutes');
const reviewRouter = require('./routes/reviewRoutes');
const viewRouter = require('./routes/viewRoutes');
const bookingRouter = require('./routes/bookingRoutes');
const bookingController = require('./controllers/bookingControllers');
const app = express();

app.enable('trust proxy');
app.set('view engine', 'pug');
app.set('views', path.join(__dirname, 'views'));
// Serving static files
app.use(express.static(path.join(__dirname, 'public')));

// Set security HTTP headers
app.use(
  helmet({
    crossOriginEmbedderPolicy: false,
    crossOriginResourcePolicy: {
      allowOrigins: ['*'],
    },
    contentSecurityPolicy: {
      directives: {
        defaultSrc: ['*'],
        scriptSrc: ["* data: 'unsafe-eval' 'unsafe-inline' blob:"],
      },
    },
  })
);
app.use(morgan('dev'));
// Limit requests from same API
const limiter = rateLimit({
  max: 50,
  windowMs: 60 * 60 * 1000, // hour
  message: 'Too many requests ,please try again in an hour!',
});
app.use('/api', limiter);

app.post(
  '/webhook-checkout',
  express.raw({ type: 'application/json' }),
  bookingController.webhookCheckout
);
// Body parser, reading data from body into req.body
app.use(express.json({ limit: '10kb' }));
app.use(express.urlencoded({ extended: true, limit: '10kb' }));

// Data sanitization against NoSQL query injection
app.use(mongoSanitize());
// Data sanitization against XSS
app.use(xss());
// Prevent parameter pollution
app.use(
  hpp({
    whitelist: [
      'duration',
      'ratingsQuantity',
      'ratingsAverage',
      'maxGroupSize',
      'difficulty',
      'price',
    ],
  })
);
app.use(compression());


app.use(
  cors({
    origin: 'http://localhost:3000',
    credentials: true,
  })
);

// const corsOptions = {
//   origin: 'http://localhost:3000',
//   credentials: true, //access-control-allow-credentials:true
//   optionSuccessStatus: 200,
// };
// app.use(cors(corsOptions));

app.use(cors());

app.options('*', cors());
app.use(cookieParser());

// 3) ROUTES
app.use('/', viewRouter);
app.use('/api/v1/tours', tourRouter);
app.use('/api/v1/users', userRouter);
app.use('/api/v1/reviews', reviewRouter);
app.use('/api/v1/bookings', bookingRouter);

app.all('*', (req, res, next) => {
  next(new AppError(`Can't find ${req.originalUrl} on this server!`, 404));
});
app.use(globalErrorHandler);
module.exports = app;