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app.js
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app.js
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const express = require("express");
const path = require('path'); // creates paths to the folders
const rateLimit = require('express-rate-limit');
const helmet = require('helmet');
const mongoSanitize = require('express-mongo-sanitize');
const cookieParser = require('cookie-parser');
const hpp = require('hpp');
// const sanitizeHTML = require('sanitize-html');
const xss = require('xss-clean');
const morgan = require("morgan");
// function on calling add many methods the app function.
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 viewsRouter = require('./routes/viewsRoutes');
const bookingRouter = require('./routes/bookingRoutes');
const app = express();
// setting engine template PUG: { setting up pug in express }
app.set('view engine', 'pug');
app.set('views', path.join(__dirname, 'views'));
// 1. GLOBAL MIDDLEWARES
// Serving static files
app.use(express.static(path.join(__dirname, 'public'))); // .static --> serving static files
// Set security HTTP headers
app.use(helmet());
app.use(compression());
// Development Logging
if(!process.env.NODE_ENV === 'development') {
app.use(morgan('dev'));
// using 3rd party middleware
};
// Implementing Rate Limiting
const limiter = rateLimit({
max: 47,
windowMs: 60 * 60 * 1000,
message: 'TOO many requests from this IP, Please try again in a hour!!'
}); // LIMITING IP requests form one users
app.use('/api', limiter); //middleware
// Body parser, reading data from body into req.body
app.use(express.json({ limit: '10kb' })); // sets middleware
app.use(express.urlencoded({ extended: true, limit: '10kb' })); // middleware to get data
app.use(cookieParser());
// Data sanitization against NoSQL query injection
app.use(mongoSanitize());
// Data sanitization against XSS
app.use(xss()); // cross-site scripting protects from malicious HTML code(tags)
app.use(hpp({
whitelist: [
'duration',
'ratingQuantity',
'ratingAverage',
'maxGroupSize',
'difficulty',
'price'
]
}));
// Test middleware
app.use((req, res, next) => {
req.requestTime = new Date().toISOString();
// console.log(req.cookies);
next();
});
// ROUTE handlers
// app.get('/api/v1/tours', getAllTours);
// app.post('/api/v1/tours', createTour);
// app.get('/api/v1/tours/:id', getTour);
// app.patch('/api/v1/tours/:id', updateTour);
// app.delete('/api/v1/tours/:id', deleteTour);
// Route --> use for same URLs
// mounting multiple routes
// 3. ROUTES
app.use('/', viewsRouter);
app.use('/api/v1/tours', tourRouter); // tourRouter --> middleware function
app.use('/api/v1/users', userRouter); // userRouter --> middleware function
app.use('/api/v1/reviews', reviewRouter); // reviewRouter --> middleware function
app.use('/api/v1/bookings', bookingRouter); // bookingRouter --> middleware function
// HANDLING UNHANDLED ROUTES
app.all('*', (req, res, next) => {
next(new AppError(`Cant find ${req.originalUrl} on this server!!`, 404)); // anything pass on next it will automatic directed to the error middleware
});
// BETTER ERRORS and REFACTORING
app.use(globalErrorHandler);
// 4. START SERVER
module.exports = app;