Re: HTTP/404 on Special:Upload when using POST

On Mon, 5 May 2025, Christian Kujau wrote:
> Yes, it was some Rewrite snafu after all. Installed a fresh Mediawiki on 
> the same machine with a different path, and as soon as I enabled the 
> ShortURL hacks the same thing happened.

FWIW, I still find the "error message" kinda confusing: HTTP/200 for GET, 
but HTTP/404 for POST, I didn't know where to go from here. But, strace(1) 
was able to shed some light:

 $ sudo strace -tt --decode-pids=comm -s1024 -f -o /tmp/foo \
    -p $(echo $(pgrep php) $(pgrep apache) | sed 's/ /,/g')

I did not know wether Apache or PHP-FPM was actually triggering the 
HTTP/404 so I straced both process groups. And there it was:

3644181<apache2> 00:15:12.341845 newfstatat(AT_FDCWD, "/var/www/wiki/Special:Upload",  <unfinished ...>
3644187<apache2> 00:15:12.341864 epoll_wait(25,  <unfinished ...>
3644181<apache2> 00:15:12.341890 <... newfstatat resumed>0x76c09e71ba60, 0) = -1 ENOENT (No such file or directory)
3644181<apache2> 00:15:12.341929 newfstatat(AT_FDCWD, "/var", {st_mode=S_IFDIR|0755, st_size=70, ...}, AT_SYMLINK_NOFOLLOW) = 0
3644181<apache2> 00:15:12.342006 newfstatat(AT_FDCWD, "/var/www", {st_mode=S_IFDIR|0755, st_size=124, ...}, AT_SYMLINK_NOFOLLOW) = 0AT_SYMLINK_NOFOLLOW) = 0
3644181<apache2> 00:15:12.342147 newfstatat(AT_FDCWD, "/var/www/wiki", 0x76c09e71ba60, AT_SYMLINK_NOFOLLOW) = -1 ENOENT (No such file or directory)

But /var/www/wiki does not exist, only /var/www/mediawiki does, so in the 
end that ticked me off that all this was caused by that ShortURL hackery.

Oh well, it works now :-)
-- 
BOFH excuse #428:

Firmware update in the coffee machine