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app.js
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app.js
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const express = require("express");
const morgan = require('morgan');
const tourRouter = require("./Routes/tourRoutes")
const userRouter = require("./Routes/userRoutes")
const rateLimit = require("express-rate-limit");
const helmet = require("helmet");
const AppError = require("./utils/appError");
const globalErrorHandler = require("./Controllers/errorController");
const mongoSanitize = require("express-mongo-sanitize");
const xss = require("xss-clean");
const hpp = require("hpp");
// 1) Initializing the express app
const app = express();
// 2) Get security Http headers
app.use(helmet());
// *********** Printing the environment ************
// console.log("--> env : ", process.env.NODE_ENV)
if (process.env.NODE_ENV === "development") {
app.use(morgan("dev"));
}
// 3) Body parser , reading data from body into req.body , data should be less than
app.use(express.json({ limit: "10kb" }));
// Data sanitization against NoSQL query injection
// This will filter out all the dollar signs from all types of input
app.use(mongoSanitize());
// Data sanitization again XSS
// Protect from malicious html and javascript code injected into the body
app.use(xss());
// Prevent parameter pollution , duplicate allowed with duration
app.use(hpp({
whitelist: [
"duration",
"ratingsQuantity",
"maxGroupSize",
"difficulty",
"price"
]
}));
const limiter = rateLimit({
// One hundred requests from the same ip in one hour can be done
max: 100,
windowMs: 60 * 60 * 1000,
message: "To many requests from this IP , please try again in an hour!"
})
// Prevent from (DOS and BRUTE-FORCE) like attacks
app.use("/api", limiter);
// Serving static assets for html files
app.use(express.static(`${__dirname}/public`))
// Check middle-ware
app.use((req, res, next) => {
// console.log("Hello from the middle-ware");
next();
});
// Manipulating the request object using middle-ware (Test middleware)
app.use((req, res, next) => {
// console.log("Headers : ", req.headers);
req.requestTime = new Date().toISOString();
next();
});
// Main routes
app.use("/api/v1/tours", tourRouter);
app.use("/api/v1/users", userRouter);
// If Invalid route hit
// Responding to all the urls and all the request types (post,get,patch,delete)
// Isoperational set wil be true
app.all("*", (req, res, next) => {
next(new AppError(`Cannot find ${req.originalUrl} on this server`, 404));
})
// Error handling middleware
// Four parameters :- Error handling middleware
app.use(globalErrorHandler);
module.exports = app;