Almost pretty permalinks with non-ASCII characters do not work in Apache

[peaceablewhale]

Almost pretty permalinks (using PATH_INFO) with non-ASCII characters do not work in Apache; a not found error is returned. The same permalink works in IIS when UTF-8 is used for server variables. It also works when mod_rewrite is used.

The problem is not just with Apache. Here's the issue: PATH_INFO is (according to the CGI spec) supplied url-decoded, but REQUEST_URI us url-encoded. !Wordpress does string comparisons on these two, which is fine when there are only ascii characters in the URL, but fails when there are others.

Here is a patch that works for me. I imagine it will need some testing to make sure the behaviour is consistent in all environments.

Patch breaks almost pretty permalinks in IIS. Trying to fix it.

Revised patch. Workaround now applies to Apache only.

Unfortunately, encoding PATH_INFO does not work either. I have reversed the patch logic so that we now decode REQUEST_URI instead. Verified effective in both IIS and Apache.

westi, I guess you may be the appropriate person to review this ticket, as I noticed your experience in resolving tickets related to servers~

This is caused by [15960] and can be fixed by the latest patches in #10249.

Not exactly a duplicate of the original #10249 bug, just related. 3.1 is the earliest affected version.

Still, 10249.4.patch​ fixes that.

How may unit test cases be made?

Keeping on the same path as #10249.