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app.js
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app.js
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if(process.env.NODE_ENV !== "production"){
require('dotenv').config();
}
const express = require('express');
const path = require('path');
const ejsMate = require('ejs-mate');
const mongoose = require('mongoose');
const { colordb } = require('./color');
const flash = require('connect-flash');
const ExpressError = require('./utils/ExpressError');
const methodOverride = require('method-override');
const helmet = require('helmet');
const {helmetPolicy} = require('./helmetPolicy')
const session = require('express-session');
const MongoStore = require('connect-mongo')
const mongoSanitize = require('express-mongo-sanitize')
const destinationRoutes = require('./routes/destination');
const userRoutes = require('./routes/user');
const dbUrl = process.env.DB_URL || 'mongodb://localhost:27017/your-travel-tracker' ;
mongoose.connect(dbUrl,{
useNewUrlParser: true,
useCreateIndex: true,
useUnifiedTopology: true,
useFindAndModify: false,
});
const app = express();
//server port
const port = process.env.PORT || 3000;
const db = mongoose.connection;
//db.once("state",func) once used when you want to do certian action only one time no matter how time that certain event triggers
db.once('connected', function () {
// to handle serverless deployment,must connect db before listening
app.listen(port, () => {
console.log(`Serving on port ${port}`);
});
});
db.on('connected', function () {
console.log(
colordb.connected(
'Mongoose default connection is open to ',
dbUrl
)
);
});
db.on('error', function (err) {
console.log(
colordb.error('Mongoose default connection has occured ' + err + ' error')
);
});
db.on('disconnected', function () {
console.log(
colordb.disconnected('Mongoose default connection is disconnected')
);
});
app.engine('ejs', ejsMate);
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));
// middleware defined
app.use(express.urlencoded({ extended: true }));
app.use(methodOverride('_method'));
app.use(express.static(path.join(__dirname, 'public')));
//=======
const secret = process.env.SECRET || 'everyonehassecretsbutihavenone!'
const store = new MongoStore({
mongoUrl: dbUrl,
secret,
touchAfter: 24*60*60
});
store.on("error", function(e){
console.log("SESSION STORE ERROR", e)
})
const sessionConfig = {
name:'session',
secret,
resave: false,
saveUninitialized: true,
cookie: {
httpOnly: true,
expires: Date.now() + 1000 * 60 * 60 * 24 * 7,
maxAge: 1000 * 60 * 60 * 24 * 7 + 6,
},
store:store,
};
app.use(session(sessionConfig));
app.use(flash());
app.use(helmet());
app.use(helmet.contentSecurityPolicy(helmetPolicy));
// sanitize any valuse that has $-dollar sign or similar which can affect mongo querry
app.use(mongoSanitize({
replaceWith: '_'
}))
app.use((req, res, next) => {
if (req.session.User) res.locals.userName = req.session.User;
if (req.query.isVisited == 'false') {
res.locals.isVisited = 'false';
} else res.locals.isVisited = 'true';
res.locals.success=req.flash('success');
res.locals.error=req.flash('error');
res.locals.AddDestination = req.url;
next();
});
//routes========================================================
app.use('/destination',destinationRoutes)
app.use('/',userRoutes)
//===================================================================================
app.all('*', (req, res, next) => {
next(new ExpressError('Page Not Found', 404));
});
//err middleware
app.use((err, req, res, next) => {
const { statusCode = 500 } = err;
if (!err.message) err.message = 'Oh No, Something Went Wrong!';
res.status(statusCode).render('users/error.ejs', { err });
});