Image corruption with owncloud + nginx + php-fpm

[charles]

Hi,

I was about to write an article about the deployment of Owncloud on
DragonFly BSD but I found a blocking issue.

For the background, owncloud is a php application which let you upload 
files to the server. I use it on fedora, freebsd and openbsd 
successfully since a few years.

I'm using DragonFly v3.8.1-RELEASE #16 amd64.

I installed nginx, php and owncloud with "pkg install nginx owncloud", 
copied the nginx configuration from one another of my servers, 
everything starts correctly, the web app is functional.

The weird thing is that when I upload a file, it may be corrupted. A lot 
of files are corrupted once uploaded through the web app. This is easily 
visible on jpg files : http://postimg.org/image/4d6x6hlv5/

I tried to install nginx / owncloud / php from ports instead of the 
packages, the result is the same. I also tried to change some parameters 
in php and nginx, but I can't find anything that could corrupt the 
files. nginx-devel doesn't do better.

The issue is fully reproducible inside a virtual machine running 3.8.1 
amd64 (didn't try other version).

When using apache22 with mod_php, everything is working as expected.
So I suspect a problem with nginx or a communication problem between php 
and nginx ? I tried to use php-fpm with TCP or unix socket and the 
result is the same.

If you have any clue, you are welcome ! :)


Kind regards