Win32: autoindex module doesn't support Unicode names

[Kroward 1]

Functions for traversing directories use ANSI versions of FindFirstFile() and FindNextFile(), so any characters in filenames besides basic latin become broken.

Proposed patch fix this issue converting WCHAR names to utf-8.

[Kroward 1]

Win32: WCHAR support it ngx_read_dir() to enable Unicode in autoindex

[Maxim Dounin]

Ack, it needs to be fixed. The patch in question needs more work. (And please also consider reading ​http://nginx.org/en/docs/contributing_changes.html, thanks.)

[Kroward 1]

I forgot to mention than behavior of autoindex module depends on selected charset. The patch does work with 'charset utf-8' directive in config file, but probably will give inconsistent results with other settings.

[Maxim Dounin]

See also #1433.

[Maxim Dounin]

See also #2175.

[Maxim Dounin]

For the record, I've submitted a ​patch series to address various issues with non-ASCII names on Windows, including this one. In particular, the following patch fixes issues with autoindex:

​https://mailman.nginx.org/pipermail/nginx-devel/2023-January/R5C2C6P4QYE2Y4GOHXTZ6VM6PLHARPIE.html

Review and testing appreciated.

[Maxim Dounin <mdounin@…>]

In 8130:b0a06c50c1b4/nginx:

Win32: non-ASCII names support in autoindex (ticket #458).

Notably, ngx_open_dir() now supports opening directories with non-ASCII
characters, and directory entries returned by ngx_read_dir() are properly
converted to UTF-8.

[Maxim Dounin]

Fix committed and available in nginx 1.23.4 / 1.24.0, closing this. Thanks to all involved.