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Http basic authentication header: Learn with Java code sample

noreply@blogger.com (Kamal Mettananda) — Thu, 28 Jun 2012 17:22:00 +0000

HTTP basic authentication with headers is one of the username & password based methods of securing access to web sites, web applications and web services. Purpose of this article is to analyze the details of this approach by explaining how to encode a pair of username & password as a basic...

[Wikipedia] Updated 'Terms of Use' Effective from 25th May

noreply@blogger.com (Kamal Mettananda) — Thu, 24 May 2012 16:36:00 +0000

Wikipedia, the One-stop website for most of the queries ranging from a tiny cell to the universe has a notice on top of the site claiming the 'Terms of use' (ToU) is changing tomorrow. Even though I am a regular user of Wikipedia, was never worried to read their 'ToU'. However this...

Winning Plus grows and loosing Buzz dies at Google

noreply@blogger.com (Kamal Mettananda) — Mon, 17 Oct 2011 05:03:00 +0000

Google has decided to shutdown Buzz in few weeks raising the closed product count to around 20. With the growing popularity of GMail, Google introduced Buzz in February 2010 as an integrated product to GMail which could easily attract users into Google's Social Networking product. Read more...

Subversion 1.7 Released - Under Apache Software Foundation

noreply@blogger.com (Kamal Mettananda) — Fri, 14 Oct 2011 18:30:00 +0000

Subversion 1.7, first feature release after moving to Apache Software Foundation is announced. Starting from this, Subversion will be released under Apache License, version 2 instead of the modified Apache license used by Tigris. Read more » Home

Are You Leaving Office On Time or Late Continuously?

noreply@blogger.com (Kamal Mettananda) — Thu, 13 Oct 2011 17:20:00 +0000

Before reading further; just try and answer the question "Are you leaving the office on-time or late continuously?" and keep the answer to yourself. Most of the employees in an organization have to follow a plan, stick to a schedule. Also there are estimates for the tasks that are pending...

Firefox Address (Location) Bar Hidden or Missing

noreply@blogger.com (Kamal Mettananda) — Wed, 12 Oct 2011 16:31:00 +0000

Firefox Address bar (or Location bar) is not visible suddenly and browser looks some what similar to the image shown here. Though Navigation bar is visible; there is no space to enter a URL? Sometimes users face this issue though it is not that common. This article shows how to resolve the issue;...

Steve Jobs - Most innovative genius is no more

noreply@blogger.com (Kamal Mettananda) — Fri, 07 Oct 2011 02:26:00 +0000

October 5th is going to be a sad day to technology lovers. As you all are aware; Steve Jobs, co-founder of Apple Inc. has passed away at the age of 56 on 5th October 2011. As common to everybody, he also did not have a smooth flow of nicely organized stages in his life; but Steve was praising that...

Facebook notification email settings can be customized

noreply@blogger.com (Kamal Mettananda) — Wed, 28 Sep 2011 09:11:00 +0000

Facebook notification emails are received for most of the follow up events like comments on photos, tags in photos, wall comments and many more. For a regular Facebook user, it might be difficult to manage the amount of emails received; even some are a bit of less useful. Have you already started...

Encrypted vs Hashed Passwords - Which is better?

noreply@blogger.com (Kamal Mettananda) — Tue, 27 Sep 2011 15:00:00 +0000

Topics like password strength, protection, encryption are almost everywhere these days. Password maintenance related subjects like password managers, recovery tools and crackers are also gaining attention. A user name and a password is a must in almost all software applications like email...

[Tomcat] How to change default JSESSIONID cookie/parameter identifier

noreply@blogger.com (Kamal Mettananda) — Wed, 27 Oct 2010 15:34:00 +0000

Changing default JSESSIONID name of cookie and/or parameter is the objective. Deployed J2EE web applications use browser cookie or parameter based session management technique. By default session cookie name is defined as “JSESSIONID” and session id parameter as “jsessionid” in Apache Tomcat...

Thunderbird 3.1.5 Release with Critical security fixes

noreply@blogger.com (Kamal Mettananda) — Wed, 20 Oct 2010 19:03:00 +0000

Mozilla Thunderbird 3.1.5 version released today. This free and open source email client is one of the better standalone ones available. Since development is done by a community of developers with the help of security experts; issue identification and resolution process is so efficient. Thunderbird...

[Linux] Find filenames list by content search and file format

noreply@blogger.com (Kamal Mettananda) — Wed, 20 Oct 2010 17:25:00 +0000

Generally computer users can memorize the locations of different files that they read or store. As the number of files increases, they can use descriptive filenames making it easy to guess the content by looking at the file name. However when the number of files grows higher & higher in number,...

[Java] The enum constant reference cannot be qualified in a case label of switch statement

noreply@blogger.com (Kamal Mettananda) — Tue, 19 Oct 2010 14:11:00 +0000

The enum constant reference cannot be qualified in a case label is an error message you may encounter while using Java enum values against a switch statement. I assume you are aware Java allows enums to be used in switch statements other than convertible int values. In ShortWhen a Java switch...

Data Encryption Decryption using AES Algorithm, Key and Salt with Java Cryptography Extension

noreply@blogger.com (Kamal Mettananda) — Wed, 07 Oct 2009 15:51:00 +0000

In this tutorial we will implement a full data encryption decryption cycle with Java (only data, not file encryption); encrypt some data using a secret key, salt and iterations and decrypt using the same parameters. We are using the Java Cryptography Extension (JCE) for data encryption/decryption...

[Ant] Build .WAR files in Eclipse for Web Applications

noreply@blogger.com (Kamal Mettananda) — Tue, 28 Jul 2009 13:17:00 +0000

Eclipse JEE versions support Java Web Application projects, but other Eclipse versions do not. Java developers need to build WAR (web archive) files for deployments (yes, Exploded deployments are also possible). However Eclipse does not provide a direct way to create war files; developers write ant...

[Tomcat] validateJarFile(servlet-api.jar) - jar not loaded. Offending class: javax/servlet/Servlet.class

noreply@blogger.com (Kamal Mettananda) — Thu, 09 Jul 2009 13:28:00 +0000

org.apache.catalina.loader.WebappClassLoader validateJarFile INFO: validateJarFile(<APP_PATH>\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class. We are using Apache Tomcat to deploy web applications, and getting...

Attempted to lock an already-locked dir: Subversion issue

noreply@blogger.com (Kamal Mettananda) — Wed, 08 Jul 2009 17:01:00 +0000

"Attempted to lock an already-locked dir" - svn: Working copy locked; this message is frequently faced by users of SubVersion (SVN) source repository. The message is self explanatory; simply some source files are locked and no commit or update operations allowed on those files/folders. In some...

Tomcat + Apache HTTP: Servers Connecting Guide

noreply@blogger.com (Kamal Mettananda) — Wed, 05 Nov 2008 12:01:00 +0000

Apache Tomcat is a Servlet/JSP container and used to deploy dynamic Java contents like JSPs and Servlets. Tomcat has some web server capabilities, however it is not a full blown web server to serve high traffic web sites. In the meantime Apache HTTP server is a full blown web server. So in general...

Unable to load dynamic library php_curl.dll: Error message in PHP

noreply@blogger.com (Kamal Mettananda) — Wed, 15 Oct 2008 11:48:00 +0000

In Windows, while trying to use "curl" extension with PHP 5.2/Apache 2; you may encounter a blank page. If you open up the error log file in Apache (%APACHE_HOME%\logs\error.log); you may see an error message as follows. "PHP Warning: PHP Startup: Unable to load dynamic library...

Manage HTTP headers with Java Servlets: Quick Notes

noreply@blogger.com (Kamal Mettananda) — Wed, 15 Oct 2008 11:43:00 +0000

In Java Servlets API, both HttpServletRequest and HttpServletResponse interfaces (in javax.servlet.http package) provide methods to programatically manipulate HTTP headers. There are a number of standard HTTP headers exchanged between a web server and a client (eg: a browser). "Content-Type" is a...

Google redirect to incorrect country domain: Fix on Firefox

noreply@blogger.com (Kamal Mettananda) — Wed, 08 Oct 2008 11:33:00 +0000

Google servers identify the country of the googler and redirect to the relevant country domain. They may be using the IP of the request to locate the country before the redirect. However there are situations many googler getting redirected to incorrect country domains. For example, even though our...

Gmail Multiple Sessions Alert: This account is open in 1 other location

noreply@blogger.com (Kamal Mettananda) — Tue, 23 Sep 2008 11:56:00 +0000

"This account is open in 1 other location at..." Gmail user interface provides this message when your account is used in multiple locations simultaneously. One of the most important and interesting security feature that any web mail service would wish to provide. I suppose Gmail is the only web...

Sun suspends NetBeans IDE DVD Starter Kit distribution program

noreply@blogger.com (Kamal Mettananda) — Wed, 17 Sep 2008 03:01:00 +0000

Sun has suspended their NetBeans IDE DVD Starter Kit distribution program indefinitely. Yes, you read it correctly; they have done it. So many developers used to get most of Sun (free) products through the distribution program. Students with less bandwidth (in some colleges & universities);...

Lazy loading vs. pre-loading beans with Spring Framework

noreply@blogger.com (Kamal Mettananda) — Tue, 09 Sep 2008 12:16:00 +0000

Spring framework can instantiate and bind (called loading) related Java objects (called beans) according to a given configuration. An XML file can easily be used to define these bindings. Spring framework supports two different types of loading methods; lazy loading and pre-loading respectively...

[Eclipse] Access restriction: Class is not accessible due to restriction on required library

noreply@blogger.com (Kamal Mettananda) — Tue, 09 Sep 2008 12:00:00 +0000

"Access restriction: Class is not accessible due to restriction on required library"; error message may be shown while developing Java projects in Eclipse IDE. Error message is self-explanatory, some classes can not be loaded into the project since restriction rules are being imposed on those...