webdav permission

I'm using archlinux.

I set up nginx webdav with dav-ext-module from github...

I couldn't write any file.

I do everything.

dav_access user:rw group:rw all:rw;

or I change file owner to http.

And I change worker_process owner to same owner with files.

Eventually, I couldn't have write permission..

What should i do?