Wordpress is ignoring Unicode Chars in URL

Question

I am using wordpress with this type of permalink:

/%year%/%monthnum%/%postname%/

if I use this type of url: example.com/2010/03/तकनीक

it treats this url like this example.com/2010/03/ (By ignoring unicode chars) and displays March 2010 archive list.

if I use english url: example.com/2010/03/technology then it works perfectly.

This problem occurs even on tags page: for example example.com/tag/इंटरनेट is treated like example.com/tag/ and displays 404 page.

Why wordpress is ignoring unicode chars?

If I use default querystring structure then it works perfectly even with unicode characters.

Server Info: IIS7 Win2008 Server (Url rewriting enabled) Wordpress 2.9.2

Answer 1

For an overview of the problem, review:

http://ruslany.net/2010/03/important-update-for-iis-7-0-fastcgi-module/

this refers you to the now outdated:

http://ruslany.net/2010/02/fastcgi-module-differences-across-iis-versions/

My own situation was fixed by applying Win 7 SP1 but, interestingly, I was still left with applying the registry hack that is described in the Hotfix:

http://support.microsoft.com/kb/2277918

Answer 2

I am running WAMP server on local machine. I tested $_SERVER['PATH_INFO'] on my IIS7 web server and found that it has some unicode problem. Wordpress uses path_info to handle urls. I created a file test.php with following code:

If I request http://example.com/test.php/कुछशब्द/कुछऔरशब्द/english

then I get this output

----****----

/???????/?????????/english ----****---- path_info is converting unicode hindi chars to ?????. That means there is some problem in path_info variable in my server. Do you know any setting IIS7 that can cause such type of problem?

The same code works perfectly fine on my local Apache Windows server.