app.js

var express      = require('express'),
    path         = require('path'),
    favicon      = require('serve-favicon'),
    logger       = require('morgan'),
    cookieParser = require('cookie-parser'),
    bodyParser   = require('body-parser'),
    compression  = require('compression'),
    engine       = require('ejs-mate'),
    gengo        = require('gengojs');

var routes = require('./routes/index');

var app = express();

// view engine setup
app.engine('ejs', engine);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');

app.use(compression({
    threshold: 512
}));
// 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, 'bower_components')));
app.use(express.static(path.join(__dirname, 'public')));
app.use(gengo({
  backend:{
    directory: path.join(__dirname, '/locales')
  },
  header:{
    supported:['ja', 'en-us'],
    default: 'en-us',
    detect:{
      cookie:true,
      header:false
    }
  }
}));

app.use('/', routes);

// 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;