db_upload.js

var express = require('express'),
    http = require("http"),
    url = require("url"),
    multipart = require("multipart"),
    sys = require("sys"),
    hbs = require ("hbs"),
    fs = require('fs'),
    Dropbox = require('dropbox'),
    email = require("emailjs/email"),
    exec = require('child_process').exec,
    app = express();




var server  = email.server.connect({
   user:    <gmail username>
   password:<gmail Password>, 
   host:    "smtp.gmail.com", 
   ssl:     true

});

app.use(express.bodyParser());
app.set('view engine', 'html');
app.engine('html', hbs.__express);

var client = new Dropbox.Client({
  "key": <DropBox key>,
  "secret": <Dropbox Secret Key>,
  "token": <Dropbox Token>,
  "uid": <DropBox UID>
});


client.authenticate({interactive:false},function (error, client) {
    if (error) {
        console.log(error);
    }
	
    if (client.isAuthenticated()) {
        console.log("Dropbox Auth done");
    }

});







app.get('/', function (req, res) {

    	res.render('index');
});

/* File upload Module..  'f' reads the file sent By client and it is written to Dropbox By client.writeFile method!*/
app.post('/upload', function (req, res) {
    var f = req.files.uploads;
	var email_add =req.body.email_add;
	var phone_add = req.body.phone_add;
    var dbx_file_stat;
	var short_url;
	var whatsapp = phone_add.split(',');
    console.log("File Upload in progress...File name: "+f.name);
	
    fs.readFile(f.path, function (error, data) {
        if (error) {
            return console.log(error);
        }

        client.writeFile(f.name, data, function (error, stat) {
            if (error) {
                return console.log(error);
            }
            

            client.makeUrl(f.name, {downloadHack:true},function (error,url) {

                if (error) {

                    return console.log(error);
                }
				
				
				client.stat(f.name,function(error,stat){
				 
			    dbx_file_stat = {name:stat.name,Icon:stat.typeIcon,version:stat.versionTag,mimeType:stat.mimeType,size:stat.size,humansize:stat.humanSize,hasIcon:stat.hasThumbnail,long_url:url.url};
                
				var email_body = "\"Hi,\nYour friend recently Uploaded a new File To dropbox and shared it With you.\nHere's the link,\n"+url.url+"\nPlease go to this link and Download the file.\n\nFile information,\n"+"FileName:"+stat.name+"\nFileType:"+stat.mimeType+"\nFilesize:"+stat.humanSize+"\n------------------------------------------------------\nThanks\nEmail@ rj.2929@yahoo.com\n\nA techieB! Initiative!\"";
				
                client.makeUrl(f.name, {downloadHack:false},function (error,url) {

                if (error) {

                    return console.log(error);
                }

                short_url = url.url;

             
				var text_message = "\"Hi, Your friend Recently Uploaded a file.    Details:- File name: "+stat.name+",File link:  "+short_url+"       For more details about file , please check your mailbox  PS->This is a Autogenerated messgae please don't reply here.. A techieB! Initiative\"";
				
				// send the message and get a callback with an error or details of the message that was sent
				server.send({
				   text:    email_body, 
				   from:    <Your Gmail Address>, 
				   to:      email_add,
				   cc:      "",
				   subject: "You have got a Dropbox link!"
				}, function(err, message) { console.log(err || message); });
				
				/*Logic for sending Whatsapp Message*/
				
				whatsapp.forEach(function(whatsap,i){
				   console.log(whatsapp[i]);
                   var command = "yowsup/src/yowsup-cli.py -s " +whatsapp[i]+" "+text_message+" -c yowsup/src/config.txt";
				   child = exec(command,function (error, stdout, stderr) {
					if (error !== null) {
					  console.log('exec error: ' + error);
					  console.log(command);
					}
					else
					 console.log("Success! "+whatsapp[i]+"  "+command);
				});	
							    
				})
				}); 
				 res.type('text/plain');

				 res.send({name:stat.name,Icon:stat.typeIcon,version:stat.versionTag,mimeType:stat.mimeType,size:stat.size,humansize:stat.humanSize,hasIcon:stat.hasThumbnail,long_url:url.url});
				 res.end();
            });
			
			
        });

    });
});

})

app.use('/static', express.static(__dirname + '/static'));

app.listen(8080);
console.log("Running on port 8080");