Tuesday, January 31, 2012

Varnish/Joomla patch 1.2 in testing

We're testing the new version of Joomla support for Varnish HTTP accelerator. Version 1.2 is available for Joomla! 1.5 and 2.5. Take a look at the changelog.


Don't cache a page with error box - when JError::raise() is called or JDocumentRendererMessage is used, a header which forbids caching is being sent


Prevent displaying cached pages directly after logging in.

After successful login the user is usually redirected to referring page. In many cases the page is cached by browser, and contains a login form, thus causing confusion to the user. The problem is solved by adding a random GET variable called _rnd.

Saturday, January 14, 2012

How to disable annoying ipython exit prompt

ipython is an interactive Python shell which is generally great with its history and autocompletion, but has one annoying problem. Whenever you hit Ctrl-D to exit from ipython to bash, it asks you this question:

Do you really want to exit ([y]/n)?

Perhaps this prompt would be useful if I were using it to control an atomic power plant in emergency mode, but for my humble needs it's just annoying. It's easy to disable it - create a file called ~/.ipython/profile_default/ipython_config.py with the following content.

c = get_config()
c.InteractiveShell.confirm_exit = False

If you need a hand with Python, see what we can do for you.

Thursday, January 12, 2012

Varnish/Joomla patch update

Our patch for making Joomla work with Varnish Cache has been upgraded today. It contained a rarely occuring bug causing pages with error boxes to be cached under certain conditions.

Because of this, regular visitors may see errors like the on below, even though they didn't try to log in:

The upgrade is free to all our customers who have purchased the patch.