[wp-trac] [WordPress Trac] #14201: Canonical redirect kicks in in case of non-ASCII category/tag base

WordPress Trac wp-trac at lists.automattic.com
Mon Jul 5 09:03:39 UTC 2010

#14201: Canonical redirect kicks in in case of non-ASCII category/tag base
 Reporter:  nbachiyski    |       Owner:       
     Type:  defect (bug)  |      Status:  new  
 Priority:  high          |   Milestone:  3.0.1
Component:  General       |     Version:       
 Severity:  major         |    Keywords:       
 '''Expected behaviour'''

 Whatever the category base is, if we go to a properly formed category
 pretty permalink, canonical redirects shouldn't kick in.

 '''Actual behaviour'''

 If the category base is non-ASCII (for example: баба), the canonical
 redirect tries to redirect to the same URL. The redirect sanitizer removes
 the category base from the URL, because it is non-ASCII and redirects to
 {{{<root>//category-name/}}}. This prevents endless redirects and usually
 results in 404.

 '''Why does it happen?'''

 Category base is always used verbatim. It can't be URL-encoded, because
 the percent signs will be interpreted as permalink variables. Because of
 that the generated urls will be always in the form: {{{<root>/баба/<url-

 The contents of {{{$_SERVER['REQUEST_URI']}}} are always URL-encoded, so
 the requested URI is: {{{<root>/%D0%B1%D0%B0%D0%B1%D0%B0/<url-encoded-

 Canonical redirect functionality assumes the requested URL would be the
 same as the generated term URL and since they are different tries to


 The easiest one is to assume that if we had come to the right category
 page without any get variables, we don't need the logic for redirecting to
 the canonical category page. This is valid statement, because that logic
 relies only on removing get arguments.

 The only disadvantage with that solution is that doesn't solve the more
 general problem of discrepancies between generated and requested URLs.
 But for now it will do a good job.

Ticket URL: <http://core.trac.wordpress.org/ticket/14201>
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