server.js

#!/bin/env node
//  OpenShift sample Node application
var express = require('express');
var fs      = require('fs');
var mongo   = require('./func/mongoose.js');
var func    = require('./func/functions.js');


/**
 *  Define the sample application.
 */
var SampleApp = function() {

    //  Scope.
    var self = this;
    self.app = express();
    self.app.configure(function(){
         self.app.use(express.bodyParser());
         self.app.use(express.methodOverride());
         self.app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
        ['public/css', 'public/img', 'public/js', 'public/plugin', 'public/lib', 'public/fonts'].forEach(function (dir){
            self.app.use('/'+dir, express.static(__dirname+'/'+dir));
        });
    });


    /*  ================================================================  */
    /*  Helper functions.                                                 */
    /*  ================================================================  */

    /**
     *  Set up server IP address and port # using env variables/defaults.
     */
    self.setupVariables = function() {
       
        self.ipaddress = process.env.OPENSHIFT_NODEJS_IP;
        self.port      = process.env.OPENSHIFT_NODEJS_PORT || 8080;

        if (typeof self.ipaddress === "undefined") {
            //  Log errors on OpenShift but continue w/ 127.0.0.1 - this
            //  allows us to run/test the app locally.
            console.warn('No OPENSHIFT_NODEJS_IP var, using 127.0.0.1');
            self.ipaddress = "127.0.0.1";
        }
    };


    /**
     *  Populate the cache.
     */
    self.populateCache = function() {
        if (typeof self.zcache === "undefined") {
            self.zcache = { 'index.html': '' };
        }

        //  Local cache for static content.
        self.zcache['index.html'] = fs.readFileSync('./index.html');
    };


    /**
     *  Retrieve entry (content) from cache.
     *  @param {string} key  Key identifying content to retrieve from cache.
     */
    self.cache_get = function(key) { return self.zcache[key]; };


    /**
     *  terminator === the termination handler
     *  Terminate server on receipt of the specified signal.
     *  @param {string} sig  Signal to terminate on.
     */
    self.terminator = function(sig){
        if (typeof sig === "string") {
           console.log('%s: Received %s - terminating sample app ...',
                       Date(Date.now()), sig);
           process.exit(1);
        }
        console.log('%s: Node server stopped.', Date(Date.now()) );
    };


    /**
     *  Setup termination handlers (for exit and a list of signals).
     */
    self.setupTerminationHandlers = function(){
        //  Process on exit and signals.
        process.on('exit', function() { self.terminator(); });

        // Removed 'SIGPIPE' from the list - bugz 852598.
        ['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
         'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
        ].forEach(function(element, index, array) {
            process.on(element, function() { self.terminator(element); });
        });
    };


    /*  ================================================================  */
    /*  App server functions (main app logic here).                       */
    /*  ================================================================  */
       /**
     *  Create the routing table entries + handlers for the application.
     */
    self.createRoutes = function() {
        self.routes = { };

        self.routes['/'] = function(req, res) {
            res.setHeader('Content-Type', 'text/html');
            res.send(self.cache_get('index.html') );
        };
        var message = '';
        self.routes.allResults = function(req, res, next){

            if (req.method == 'POST') {
            //validate message 
               if(  req.body.message.length > 3 ) {
                  message = req.body.message;
               }else {
                  message = '';
               }
              res.send('post ok!');
            }else{
              next();
            }
        };

        self.routes.getResults = function(req, res){
        
           if(message === ''){
              res.send(200);
           }else{
              //validate message
              var regexMessage = func.processMessage(message);

              return mongo.English.find({'Τίτλος': regexMessage }, function(err, data) { 
                    res.send( JSON.stringify(data));
                    });
           }
        };
     };


    /**
     *  Initialize the server (express) and create the routes and register
     *  the handlers.
     */
    self.initializeServer = function() {

        self.createRoutes();
        


        //  Add handlers for the app (from the routes).
        self.app.get('/', self.routes['/']);
        self.app.all('/results', self.routes.allResults);
        self.app.get('/results', self.routes.getResults);
 
    };


    /**
     *  Initializes the sample application.
     */
    self.initialize = function() {
        self.setupVariables();
        self.populateCache();
        self.setupTerminationHandlers();

        // Create the express server and routes.
        self.initializeServer();
    };


    /**
     *  Start the server (starts up the sample application).
     */
    self.start = function() {
        //  Start the app on the specific interface (and port).
        self.app.listen(self.port, self.ipaddress, function() {
            console.log('%s: Node server started on %s:%d ...',
                        Date(Date.now() ), self.ipaddress, self.port);
        });
    };

};   /*  Sample Application.  */



/**
 *  main():  Main code.
 */
var zapp = new SampleApp();
zapp.initialize();
zapp.start();