graph.js

/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes')
  , http = require('http')
  , path = require('path')
  , query_handler = require('./query_handler');


var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 80);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(express.static(path.join(__dirname, 'public')));
});

app.configure('development', function(){
  app.use(express.errorHandler());
});

app.get('/', routes.index);
app.get('/search', function(req, res) {
    // Speed up calls to hasOwnProperty
    var hasOwnProperty = Object.prototype.hasOwnProperty;

    function is_empty(obj) {

        // Assume if it has a length property with a non-zero value
        // that that property is correct.
        if (obj.length && obj.length > 0)    return false;
        if (obj.length && obj.length === 0)  return true;

        for (var key in obj) {
            if (hasOwnProperty.call(obj, key))    return false;
        }

        return true;
    }

    if (is_empty(req.query)) {
        res.render('search');
    } else {
        query_handler.querydb(req.query, function(data) {
            res.send(data);
        });
    }
});

app.get('/:id', function(req, res) {
    query_handler.querydb({controlno: req.params.id}, function(data) {
        res.send(data);
    });
});

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});