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app.js
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app.js
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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 compression = require('compression');
const cors = require('cors');
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 bookingRouter = require('./routes/bookingRoutes');
const bookingController = require('./controllers/bookingController');
const viewRouter = require('./routes/viewRoutes');
// Start express app
const app = express();
app.enable('trust proxy');
app.set('view engine', 'pug');
app.set('views', path.join(__dirname, 'views'));
// 1) GLOBAL MIDDLEWARES
// Implement CORS
app.use(cors());
// Access-Control-Allow-Origin *
// backend at api.natours.com, front-end at natours.com
// app.use(
// cors({
// origin: 'https://www.natours.com',
// })
// );
// Another HTTP method, Browser sents us option request when there is a pre flight phase
app.options('*', cors());
// app.options('/api/v1/tours/:id', cors());
// GET POST -> Simple Request
// PATCH PUT DELETE or also request that send cookies or use non-standard headers -> Non-Simple request
// Non-Simple request require preflight phase whenever there is a non simple request, the browser will automatically issue the preflight phase.
// Before the real req actually happen lets say DELETE req, the browser first do a OPTIONS request in order to figure out if the actual request is safe to send. We need to respond to the OPTIONS request
// Serving static files to browser
// app.use(express.static(`${__dirname}/public`));
app.use(express.static(path.join(__dirname, 'public')));
// Set security HTTP headers
// app.use(helmet());
app.use(
helmet({
contentSecurityPolicy: {
directives: {
defaultSrc: ["'self'", 'data:', 'blob:', 'https:', 'ws:'],
baseUri: ["'self'"],
fontSrc: ["'self'", 'https:', 'data:'],
scriptSrc: [
"'self'",
'https:',
'http:',
'blob:',
'https://*.mapbox.com',
'https://js.stripe.com',
'https://m.stripe.network',
'https://*.cloudflare.com',
],
frameSrc: ["'self'", 'https://js.stripe.com'],
objectSrc: ["'none'"],
styleSrc: ["'self'", 'https:', "'unsafe-inline'"],
workerSrc: [
"'self'",
'data:',
'blob:',
'https://*.tiles.mapbox.com',
'https://api.mapbox.com',
'https://events.mapbox.com',
'https://m.stripe.network',
],
childSrc: ["'self'", 'blob:'],
imgSrc: ["'self'", 'data:', 'blob:'],
formAction: ["'self'"],
connectSrc: [
"'self'",
"'unsafe-inline'",
'data:',
'blob:',
'https://*.stripe.com',
'https://*.mapbox.com',
'https://*.cloudflare.com/',
'https://bundle.js:*',
'ws://127.0.0.1:*/',
],
upgradeInsecureRequests: [],
},
},
})
);
// Development logging
if (process.env.NODE_ENV === 'development') {
app.use(morgan('dev'));
}
// Limit requests from same API
const limiter = rateLimit({
max: 100,
windowMs: 60 * 60 * 1000,
message: 'Too many requests from this IP, please try again in an hour!',
});
app.use('/api', limiter);
app.post(
'/webhook-checkout',
express.raw({ type: 'application/json' }),
bookingController.webhookCheckout
);
// (express.json()) Middleware, basically a function that can modify the incoming request data
// Body parser, reading data from body into req.body
app.use(express.json({ limit: '10kb' })); // if not use this then req.body gives undefined
// The express.json() middleware parses the JSON into a JavaScript object and puts it on req.body.
app.use(express.urlencoded({ extended: true, limit: '10kb' }));
// Parse data coming from a URL encoded form
// extended:true allows us to pass some more complex data
app.use(cookieParser());
// 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());
// Test middleware
app.use((req, res, next) => {
req.requestTime = new Date().toISOString();
// console.log(req.cookies);
// console.log(process.env.NODE_ENV);
next();
});
// 3) ROUTES
// Mounting the ROUTER on a route
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);
// Implement cors in specific route
// app.use('/api/v1/tours',cors(),tourRouter)
// Handling Unhandled Routes
app.all('*', (req, res, next) => {
// const err = new Error(`Can't find ${req.originalUrl} on this server!`);
// err.status = 'fail';
// err.statusCode = 404;
next(new AppError(`Can't find ${req.originalUrl} on this server!`, 404));
});
// Global Error Handling middleware
app.use(globalErrorHandler);
module.exports = app;