NodeJS Express4
express generator
Install
npm install -g express-generator
express generator is Express command-line tool.
version check
express -V
Create application
express applicationname
applicationame is your application name
Install dependencies
This is same as Express3
npm install -g express-generator
Run
DEBUG=application:* ./bin/www
node app.js
Sample
Sample Default
var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes/index'); var users = require('./routes/users'); http = require('http'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(__dirname + '/public/favicon.ico')); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); app.use('/', routes); app.use('/users', users); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app;
Missing running codes
By template default, listen parts are missing.
Following codes should be added after module.exports = app;
app.set('port', 3000); http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); });
Directory structure
application |- app.js |- package.json |- views | - *.jade |- routes | - *.js |- models | - *.js |- public |- javascripts | - *.js |- images | - *.png, *.jpg |- stylesheets | - *.css |- test | - .*js |- logs | - *.log