Test Credit Card Numbers for Payment Gateways

Notes to Myself
MIGS (ANZ Bank, Bendigo Bank, Suncorp Bank, Commonwealth Bank CommWeb)

Card Type	Number	Expiry Date	CCV
MasterCard	5123456789012346	05/17	123
MasterCard	5313581000123430	05/17	123
VISA	4005550000000001	05/17	123
VISA	4557012345678902	05/17	123
AMEX	345678901234564	05/17	1234
Bankcard (Australian Domestic)	5610901234567899	05/17	123
Diners Club	30123456789019	05/17	123

Magento - How to switch Base URLs without modifying the Database

As Magento keeps its base URL in database, there is no easy way of accessing the same database from two different URLs(dev/ staging) or moving the same database to staging environment from development without updating core_config_data table.

After fiddling around with Magento core, I found that getBaseUrl() is responsible of retrieving base URL. So If we could override getBaseUrl() method to get the base URL from dev or staging environments without depending on the database, then we could keep database records with live settings.

Below code will explain how I achieved this task and the code itself is explainable.

1. app/etc/modules/My_Configurator.xml

    
        
            true
            local
        
    

2. app/code/local/My/Configurator/etc/config.xml

    
        
            
                
                    My_Configurator_Model_Store
                
            
        
    

3. app/code/local/My/Configurator/Model/Store.php

Note: Make sure you disable this extension from production server as we want to run getBaseUrl() method from the Core.

Happy Coding..

Symfony2 - Load different templates based on user agent

If you want to load different templates for different user agents while keeping the same backend code base, you can accomplish this simply in 2 ways.

1.  Responsive Template
2. Load different templates against user agents.

In this blog post I'm trying to demonstrate the option 2 (load different templates against user agents)

The trick is to use RequestFormat in symfony

1. Create a Request Listener

php app/console generate:bundle --namespace=Acme/RequestListenerBundle --format=yml

Note: You don't need Controller, Tests directories

Past the below code to AcmeRequestListnerBundle.php

getRequest();

        if(preg_match('/(alcatel|amoi|android|avantgo|blackberry|benq|cell|cricket|docomo|elaine|htc|iemobile|iphone|ipad|ipaq|ipod|j2me|java|midp|mini|mmp|mobi|motorola|nec-|nokia|palm|panasonic|philips|phone|playbook|sagem|sharp|sie-|silk|smartphone|sony|symbian|t-mobile|telus|up\.browser|up\.link|vodafone|wap|webos|wireless|xda|xoom|zte)/i', $request->headers->get('user-agent')))
        {
            $request->setRequestFormat('mobile', 'text/html');
        }else {
            $request->setRequestFormat('html', 'text/html');
        }
    }

    private function setFormat (\Symfony\Component\HttpFoundation\Request $request, $format='html') {
        $request->setRequestFormat($format, 'text/html');
    }
}

2. Create a test action in your controller

Action 

    /**
     * @Route("/test", name="_demo_test")
     * @Template()
     */
    public function testAction()
    {
        return array(
            'name' => 'Thilanga Pitigala',
        );
    }

Note: Run

php app/console router:debug | grep _demo_test

and verify the newly created action and the router

Template

Create the template for newly created action

Acme/DemoBundle/Resources/views/Demo/test.html.twig

{% extends "AcmeDemoBundle::layout.html.twig" %}

{% block title "Hello " %}

{% block content %}
    

Hello Desktop !
{% endblock %}

2. Create a Service using RequestListener

Add below code to config.yml

services:
    acme.listener.request:
        class: Acme\RequestListenerBundle\AcmeRequestListenerBundle
        tags:
            - { name: kernel.event_listener, event: kernel.request, method: onKernelRequest }

Note: run

php app/console container:debug | grep acme.listener.request

  and That will output the newly created service

2. Test RequestListener service

Try visiting the web applications from mobile device. It will throw an error complaining about missing test.mobile.twig file.

Create the test.mobile.twig file in Acme/DemoBundle/Resources/views/Demo/test.html.twig as we created the test.html.twig template.

Now you will be able to see the mobile template from mobile devices while desktop template load for desktop agents.

By that way we can load different templates for different agents without doing any responsive templates.

Happy Coding..

Symfony2 - Setup an Application in a minute

1. Download

Download the Symfony Standard Edition from http://symfony.com/download (at the moment of writing this post latest stable version is 2.1)

cd /home/user/Downloads/
wget --content-disposition 'http://symfony.com/download?v=Symfony_Standard_Vendors_2.1.4.tgz'
tar -zxvf Symfony_Standard_Vendors_2.1.4.tgz
mv Symfony /var/www/symfony

Then Point /var/www/symfony/web directory to the your web server

2. Configuration

Now We are going to use app.php as the main index file instead of playing with app_dev.php within the development enviroment.

vim web/app.php

Replace your app.php with the below code

// Make group permissions stick in cache/log dirs
umask(0002);

use Symfony\Component\ClassLoader\ApcClassLoader;
use Symfony\Component\HttpFoundation\Request;

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';
require_once __DIR__.'/../app/AppKernel.php';

$env = 'prod';

if (isset($_SERVER['HTTP_HOST'])) {
    if (preg_match('/(localhost|local\.)/', $_SERVER['HTTP_HOST'])) {
        $env = 'dev';
    }
}

$kernel = new AppKernel($env, $env == 'dev');
$kernel->loadClassCache();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);
$response->send();
$kernel->terminate($request, $response);

Load your Symfony site by typing http://localhost/symfony in your web browser

Now you can access Symfony Development environment without visiting to app_dev.php.

Why Symfony2?

With the PHP5 there was a big hype in PHP frameworks and MVC pattern. As a result, lots of developers got lost within frameworks while trying to figure out the best.

I was one of them.

When it comes to PHP frameworks, ZEND, CodeIgniter were my favourites.  I used CodeIgniter for simple applications and ZEND framework was the giant who saved my good hours. But I never enjoyed PHP with frameworks. Frameworks are good for just get things done.

After I joined with August I got chance to work with Symfony. Not just Symfony, It's Symfony2 :)

Symfony2 is one of a kind framework, it is not a MVC framework. If you look at the Symfony2 architecture, you could find controllers, views but no models. It has been developed as a HTTP framework.

That is how the web works.

The biggest concern in Symfony2 is decoupling and from the core it has given reusable set of standalone components to use. Simply it has provided a set of tools to develop applications as we want.

At the beginning, I was really frustrated because it seems to be complicated and over engineered. however after few days of work I started liking how it works.

The most impressive part in Symfony2 is the 'Bundle' concept. If you write a Symfony2 bundle, simply you can run it within any Symfony2 project without a hassle.  A bundle contains it's own configurations, routing rules, actions, templates and business logic codes.

Dependency injection is another powerful feature which we can commonly see in JAVA developments. That means Symfony2 has adopted lots of best things from other languages without trying to reinvent the wheel.

According the the Symfony2 documentation, it contains 21 standalone libraries which we can use for day-to-day developments.

1. DependencyInjection
2. EventDispatcher
3. HttpFoundation
4. DomCrawler
5. ClassLoader
6. CssSelector
7. HttpKernel
8. BrowserKit
9. Templating
10. Translation
11. Serializer
12. Validator
13. Security
14. Routing
15. Console
16. Process
17. Config
18. Finder
19. Locale
20. Yaml
21. Form

It is not an easy task to explain the awesomeness of Symfony2 in a single blog post :)

This is going to be the very first of many blog posts about Symfony2. I'll be writing some tutorials specially for beginners who are willing to use Symfony2 in their next projects.

How to setup an ultra-fast CDN using Nginx and Varnish

If your website takes more than 3 seconds to load, there is a big chance to loose your site visitors and that is a risk we are dealing with today due to the big competition in the industry.

There are lots of reasons which effects on the site's speed. 

1. Large multimedia contents
2. DNS look up issue
3. Server response time 
4. Multiple redirects

are few from a lengthy list.

If you are using a good CDNs to serve contents, then that will give a good boost while loading the site. Last month I had to setup up Our own CDN for WSO2 Oxygentank Developer Portal and i'm trying to summaries steps that I followed.

Installing Nginx and varnish

1. apt-get install nginx
2. apt-get install varnish

Nginx Config

• (/etc/nginx/sites-enabled/default)server {
         open_file_cache_valid 20m;
          listen 81;
          server_name mydomain.com;
          access_log   /var/log/cdn/mydomain.com/logs/access.log;
          root   /cdn_document_path/;
  
          location ~* \.(gif|jpg|jpeg|png|wmv|avi|mpg|mpeg|mp4|htm|html|js|css|mp3|swf|ico|flv)$ {
                          open_file_cache_valid 120m;
                          expires 7d;
                          open_file_cache max=1000 inactive=20s
          }
         
           location = /50x.html {
                          root   /var/www/nginx-default;
          }
  
          # No access to .htaccess files.
          location ~ /\.ht {
              deny  all;
          }
  }

Varnish Config

• (/etc/default/varnish)START=yes
  NFILES=131072
  MEMLOCK=82000
  INSTANCE=$(uname -n)
  DAEMON_OPTS="-a :80 \
               -T localhost:6082 \
               -f /etc/varnish/default.vcl \
               -S /etc/varnish/secret \
               -s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"
• (/etc/varnish/default.vcl)backend default {
      .host = "127.0.0.1";
      .port = "81";
  }
  
  sub vcl_recv {
  if (req.url ~ “\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|swf)$”) {
  return (lookup);
  }
  }
  
  sub vcl_fetch {
  if (req.url ~ “\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|swf)$”) {
  unset obj.http.set-cookie;
  }
  }

Start Nginx and Varnish

1. /etc/init.d/nginx start
2. /etc/init.d/varnish restart

Once you start Nginx and Varnish. Varnish will start to server port 80 web traffic. If it is a static content varnish will server and nginx will look after all dynamic contents.

How to Setup smstools in debian

3G dongle is the only bandwidth service I have when i'm home. (If my neighbor didn't turn on his WIFI connection ). Due to heavy usage of mobile broadband, my 3g Dongle frequently get caught to service disruptions by exceeding the reserved data bundle, Most of the time I had to call 3G service provider to get the connection temporary to do an online payment.

Normally service provider send a SMS when reaching the reserved quota (Probably when reaching 75%). But as I can't use Mobile Partner software in linux, I always missed those SMSs, if I didn't connect my dongle in to a Windows powered machine (As I hardly use Windows OS, most of the time I was in trouble).

As a solution I installed and configured smstools to avoid this mess and getting alone without the Internet.

Install smstools

1. sudo apt-get install smstools (Install smstools)
2. dmesg | grep usb (get the device. ex: /dev/ttyUSB0)
3. sudo vim /etc/smsd.conf (smstools config file)
4. sudo /etc/init.d/smstools start (Start smstools after changing configurations)
5. cd  /var/spool/sms/incoming (to see incoming sms)

Configuration  (/etc/smsd.conf)

devices = GSM1

outgoing = /var/spool/sms/outgoing

checked = /var/spool/sms/checked

incoming = /var/spool/sms/incoming

logfile = /var/log/smstools/smsd.log

infofile = /var/run/smstools/smsd.working

pidfile = /var/run/smstools/smsd.pid

outgoing = /var/spool/sms/outgoing

checked = /var/spool/sms/checked

failed = /var/spool/sms/failed

incoming = /var/spool/sms/incoming

sent = /var/spool/sms/sent

receive_before_send = no

autosplit = 3

[GSM1]

device = /dev/ttyUSB0

incoming = yes

baudrate = 19200

memory_start = 1

If you configured the smstools properly you will get sms to  /var/spool/sms/incoming

Test your settings.

1. Send a test sms to your 3G Dongle from a mobile phone
2. then ls /var/spool/sms/incoming (if the dongle received the sms, you will see a file, name is slimier to GSM1.AuvV6s  )
3. vim  /var/spool/sms/incoming/$filename to read the sms

Debug your setings

1. sudo tail -f /var/log/smstools/smsd.log

Note: I didn't test sms sending through the 3G dongle as my service provider has blocked the facility.