server.js

'use strict'

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 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(path.join(__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);

// 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;
JSON.stringifyOnce = function(obj, replacer, indent){
  var printedObjects = [];
  var printedObjectKeys = [];

  function printOnceReplacer(key, value){
    if ( printedObjects.length > 2000){ // browsers will not print more than 20K, I don't see the point to allow 2K.. algorithm will not be fast anyway if we have too many objects
      return 'object too long';
    }
    var printedObjIndex = false;
    printedObjects.forEach(function(obj, index){
      if(obj===value){
        printedObjIndex = index;
      }
    });

    if ( key == ''){ //root element
      printedObjects.push(obj);
      printedObjectKeys.push("root");
      return value;
    }

    else if(printedObjIndex+"" != "false" && typeof(value)=="object"){
      if ( printedObjectKeys[printedObjIndex] == "root"){
        return "(pointer to root)";
      }else{
        return "(see " + ((!!value && !!value.constructor) ? value.constructor.name.toLowerCase()  : typeof(value)) + " with key " + printedObjectKeys[printedObjIndex] + ")";
      }
    }else{

      var qualifiedKey = key || "(empty key)";
      printedObjects.push(value);
      printedObjectKeys.push(qualifiedKey);
      if(replacer){
        return replacer(key, value);
      }else{
        return value;
      }
    }
  }
  return JSON.stringify(obj, printOnceReplacer, indent);
};