[Techtalk] weird wordpress error: 404 on % in permalinks

Lisa Kachold lisakachold at obnosis.com
Fri Oct 19 21:42:09 UTC 2012

Version of wordpress
.htaccess file
Grep rewrite httpd.conf
Grep include httpd.conf

http://blog.doncho.net/?p=462 and the thread is here:
http://wordpress.com/forums/topic.php? id=2076&replies=21
 On 19 Oct 2012 13:44, "Carla Schroder" <carla at bratgrrl.com> wrote:

> hey all,
> A friend is having a strange issue with Wordpress permalinks, and I am
> baffled. In the admin panel he wants to use something like this for
> permalinks: /%year%/%month%/%postname%   Plain old ordinary stuff,
> right? But this always creates 404 error. This always happens with a
> percent sign followed by a non-whitespace.
> I thought it was mod_rewrite not enabled, but he says:
> "I'm not sure this error is related to mod_rewrite. The fact that this
> error pops up when I submit POST data that contains a percent sign
> ("%") followed by non-whitespace leads me to believe that the webserver
> is interpreting that portion of the POST data as a Unicode entity.
> Sooo... I did a little experiment:
>    1. On the WordPress admin permalinks page, I tried submitting one of
>    the standard, predefined permalink patterns. I got a 400 BAD REQUEST
>    error like I did last Monday.
>    2. I tried submitting a permalink pattern that is only this text:
>    "%20" (minus the quotes.) %20 is a Unicode entity that signifies a
>    space. This was submitted successfully *without error*.
>    3. I tried submitting only this text: "%y". That would be an invalid
>    Unicode entity. Submitting it produced the 400 BAD REQUEST error.
> To be sure, the same error also pops up when I submit forms in the theme
> admin page, which is totally separate from the permalinks page.
> So, it looks like the webserver is interpreting the body of the POST
> data for entities, which it isn't supposed to do."
> Thoughts? It's Apache with the usual LAMP accessories on CentOS 6.3.
> best,
> Carla
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Carla Schroder
> ace Linux nerd
> buy my books! Book of Audacity,
> Linux Networking Cookbook,
> Linux Cookbook
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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