GET /@api/deki/files/ returns HTTP error 501

[erik sj]

Hi,
Strangely one of our Dekiwiki web sites
http://www.cbr.su.se
stopped showing images. But on the same server the other websites works just fine, for instance:
http://www.edict-project.eu

For instance after browsing to http://www.cbr.su.se with the chromium web browser I see this
in the log file:
[root@virt-movitz ~]# grep everyone1 /var/log/httpd/dekiwiki-access_log | tail -1
10.0.1.1 - - [23/Apr/2012:11:39:27 +0200] "GET /@api/deki/files/37/=cbr_everyone1_narrow.png?size=webview HTTP/1.1" 501 309
[root@virt-movitz ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* extras: ftp.sunet.se
* rpmforge: ftp-stud.fht-esslingen.de
Setting up Update Process
No Packages marked for Update
[root@virt-movitz ~]# cat /etc/issue
CentOS release 6.2 (Final)
Kernel \r on an \m
[root@virt-movitz ~]# grep baseurl /etc/yum.repos.d/mindtouch.repo
baseurl=http://repo.mindtouch.com/CentOS_5/

Maybe the mismatch Centos 5 != Centos 6 could mean something?

But then again, why would it fail for just one of the web sites?

I don't get any ideas out of reading
/var/log/httpd/dekiwiki-error_log

Do you have any idea how I could debug this?

cheers,
Erik

[SteveB]

This appears more like a configuration issue. The two cases where the API return 501 for image operations are:
1) the API is not configured to allow this file extension to be converted for preview (check files/imagemagick-extensions under advanced config)
2) the image is too big (check files/imagemagick-max-size under advanced config)

[erik sj]

Thanks for the reply!

I couldn't find any configuration keys with the names files/imagemagick-extensions or files/imagemagick-max-size in the "Advanced config".

If I type this command:
[root@virt-movitz ~]# ls -lSr /var/www/dekiwiki/attachments-cbr/*.res/1.bin

I see file sizes ranging from a few kB to 3 Mb.

I found something else. Could this be a problem?

[root@virt-movitz ~]# rpm -qc mindtouch | grep AdminSetting
/var/www/dekiwiki/AdminSettings.php
[root@virt-movitz ~]# ls /var/www/dekiwiki/AdminSettings.php
ls: cannot access /var/www/dekiwiki/AdminSettings.php: No such file or directory

cheers,
Erik

[SteveB]

As far as I recall, AdminSettings is an optional file.

The default values for the config key are listed here: http://developer.mindtouch.com/en/kb...eys_and_values

files/imagemagick-extensions = bmp, jpg, jpeg, png, gif
files/imagemagick-max-size = 2000000

So, if your png is larger than 2M bytes, it won't generate a thumbnail for it.