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On a website of my college I noticed something strange.


What is this circled and how it is there?

What is it, and how they put it there?

I searched for MST3k and this I found: http://en.wikipedia.org/wiki/Mystery_Science_Theater_3000

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The X-MST3k argument is likely used for randomization and identification with a random quote assigned to your session. So it could be used to differentiate server calls and detect spammy attacks or loopy calls. – Julio Jan 29 '14 at 18:17
This really isn't a Web Apps question, but I don't know of a place where it would belong. – Al E. Jan 29 '14 at 18:19
up vote 1 down vote accepted

The administrator of a web server can configure it to add any arbitrary HTTP headers the administrator desires.

HTTP headers can also be added by the PHP software that generates the pages. In this particular case, it appears that the University of Zagreb Faculty of Electrical Engineering and Computer Science designed the software, called QuiltCMS. See the source code of the home page:

<meta name="generator" content="QuiltCMS 2.0, http://www.fer.hr/" />

At the bottom of that page there is a link to contact the webmaster by email. I imagine that is the best way to find out what technique they are using to add the X-MST3k header.

I believe the QuiltCMS software is sending the header, rather than the web server itself, because the header only appears when a text/html page is requested. If you check the response headers for a random text/css file, for example, there is no X-MST3k header.

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