Category Archives: java

Matchbook – Multi-platform Realtime Gaming

Posted on January 26, 2014 by aroth

Have you ever thought that it would be cool if you could build a cross-platform or multi-platform game and connect from one platform to another without having to do all the heavy lifting with respect to matchmaking, communications, and related … Continue reading →

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Resurrecting sun.misc.Unsafe

Posted on July 10, 2011 by aroth

Here’s one that only the hardcore Java hackers will enjoy. Perhaps you are already familiar with sun.misc.Unsafe. This heavily protected internal class provides access to a number of low-level memory operations and system functions that are generally hidden away from … Continue reading →

Posted in coding, java | Tagged , | 2 Comments

[Java] Quarantining Request Parameters

Posted on June 12, 2011 by aroth

This is a follow-up on an earlier post in which I described a method for modifying HTTP request parameters on the fly in a servlet/web application. I mentioned that the technique could be used to provide a filter that automatically … Continue reading →

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[Java] URL Rewriting on Tomcat (or any other servlet container)

Posted on June 7, 2011 by aroth

Here is a very nice little utility I found recently on an unfortunately very difficult to navigate website. In case it’s not immediately apparent from that site what I am referring to, I’m talking about the ‘UrlRewriteFilter‘ utility featured near … Continue reading →

Posted in coding, configuration, java, servlet, software | Tagged , , | 3 Comments

[Java] Override HTTP Request Parameters

Posted on May 15, 2011 by aroth

Often in a Java web-application I come across cases where it would be useful to directly override or modify one or more HTTP request parameters. To be clear, by “request parameter” I am referring to the value that is returned … Continue reading →

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[Java] Defeating CAPTCHA Images

Posted on January 30, 2011 by aroth

Disclaimer: Depending upon the country you currently reside in, programmatically defeating CAPTCHA images may technically be illegal. Whether or not there is any merit behind such a law I leave as a matter for you to work out with your … Continue reading →

Posted in coding, java | Tagged , , , | 30 Comments