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- module.js:340
- throw err;
- ^
- Error: Cannot find module 'connect-mongo'
- at Function.Module._resolveFilename (module.js:338:15)
- at Function.Module._load (module.js:280:25)
- at Module.require (module.js:364:17)
- at require (module.js:380:17)
- at Object.<anonymous> (/home/amitnaik01/Login/server.js:6:18)
- at Module._compile (module.js:456:26)
- at Object.Module._extensions..js (module.js:474:10)
- at Module.load (module.js:356:32)
- at Function.Module._load (module.js:312:12)
- at Function.Module.runMain (module.js:497:10)
- {
- "name": "ExpressApp",
- "version": "0.0.1",
- "description": "A Node.js App using express",
- "dependencies": {
- "express": "~4.0.0",
- "body-parser": "~1.0.2",
- "express-session": "~1.0.3",
- "express3-handlebars": "~0.5.0",
- "mongodb": "~1.4.2",
- "connect-mongo": "git+https://github.com/kcbanner/connect-mongo.git#master",
- "cookie-parser": "~1.0.1"
- },
- "engine": "node >=0.6.x"
- }
- var express = require('express');
- var app = express();
- var expressSession = require('express-session');
- var expressHbs = require('express3-handlebars');
- var mongoUrl = 'mongodb://localhost:27017/dbname';
- var MongoStore = require('connect-mongo')(expressSession);
- var mongo = require('./mongo');
- var port = 8000; // for heroku you would use process.env.PORT instead
- // This is a middleware that we will use on routes where
- // we _require_ that a user is logged in, such as the /secret url
- function requireUser(req, res, next){
- if (!req.user) {
- res.redirect('/not_allowed');
- } else {
- next();
- }
- }
- // This middleware checks if the user is logged in and sets
- // req.user and res.locals.user appropriately if so.
- function checkIfLoggedIn(req, res, next){
- if (req.session.username) {
- var coll = mongo.collection('users');
- coll.findOne({username: req.session.username}, function(err, user){
- if (user) {
- // set a 'user' property on req
- // so that the 'requireUser' middleware can check if the user is
- // logged in
- req.user = user;
- // Set a res.locals variable called 'user' so that it is available
- // to every handlebars template.
- res.locals.user = user;
- }
- next();
- });
- } else {
- next();
- }
- }
- // Use this so we can get access to `req.body` in our posted login
- // and signup forms.
- app.use( require('body-parser')() );
- // We need to use cookies for sessions, so use the cookie parser middleware
- app.use( require('cookie-parser')() );
- app.use( expressSession({
- secret: 'somesecretrandomstring',
- store: new MongoStore({
- url: mongoUrl
- })
- }));
- // We must use this middleware _after_ the expressSession middleware,
- // because checkIfLoggedIn checks the `req.session.username` value,
- // which will not be available until after the session middleware runs.
- app.use(checkIfLoggedIn);
- app.engine('hbs', expressHbs({extname:'hbs', defaultLayout:'main.hbs'}));
- app.set('view engine', 'hbs');
- app.get('/', function(req, res){
- var coll = mongo.collection('users');
- coll.find({}).toArray(function(err, users){
- res.render('index', {users:users});
- })
- });
- app.get('/login', function(req, res){
- res.render('login');
- });
- app.get('/logout', function(req, res){
- delete req.session.username;
- res.redirect('/');
- });
- app.get('/not_allowed', function(req, res){
- res.render('not_allowed');
- });
- // The /secret url includes the requireUser middleware.
- app.get('/secret', requireUser, function(req, res){
- res.render('secret');
- });
- app.get('/signup', function(req,res){
- res.render('signup');
- });
- // This creates a new user and calls the callback with
- // two arguments: err, if there was an error, and the created user
- // if a new user was created.
- //
- // Possible errors: the passwords are not the same, and a user
- // with that username already exists.
- function createUser(username, password, password_confirmation, callback){
- var coll = mongo.collection('users');
- if (password !== password_confirmation) {
- var err = 'The passwords do not match';
- callback(err);
- } else {
- var query = {username:username};
- var userObject = {username: username, password: password};
- // make sure this username does not exist already
- coll.findOne(query, function(err, user){
- if (user) {
- err = 'The username you entered already exists';
- callback(err);
- } else {
- // create the new user
- coll.insert(userObject, function(err,user){
- callback(err,user);
- });
- }
- });
- }
- }
- app.post('/signup', function(req, res){
- // The 3 variables below all come from the form
- // in views/signup.hbs
- var username = req.body.username;
- var password = req.body.password;
- var password_confirmation = req.body.password_confirmation;
- createUser(username, password, password_confirmation, function(err, user){
- if (err) {
- res.render('signup', {error: err});
- } else {
- // This way subsequent requests will know the user is logged in.
- req.session.username = user.username;
- res.redirect('/');
- }
- });
- });
- // This finds a user matching the username and password that
- // were given.
- function authenticateUser(username, password, callback){
- var coll = mongo.collection('users');
- coll.findOne({username: username, password:password}, function(err, user){
- callback(err, user);
- });
- }
- app.post('/login', function(req, res){
- // These two variables come from the form on
- // the views/login.hbs page
- var username = req.body.username;
- var password = req.body.password;
- authenticateUser(username, password, function(err, user){
- if (user) {
- // This way subsequent requests will know the user is logged in.
- req.session.username = user.username;
- res.redirect('/');
- } else {
- res.render('login', {badCredentials: true});
- }
- });
- });
- app.use('/public', express.static('public'));
- mongo.connect(mongoUrl, function(){
- console.log('Connected to mongo at: ' + mongoUrl);
- app.listen(port, function(){
- console.log('Server is listening on port: '+port);
- });
- })
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