Fixes for nginx's webdav to work with gvfs clients.

webdav-nginx.conf

# Define lua functions
init_by_lua_block {
	function is_dir(path)
		local f = io.open(path, "r")
		if not f then
			return false
		end
		local ok, err, code = f:read(1)
		f:close()
		return code == 21
	end
}

server {

	listen 80;
	listen [::]:80;

	server_name servak.local 192.168.16.90;

	root /var/www/html;

	sendfile           on;
	sendfile_max_chunk 1m;
	tcp_nopush on;
	tcp_nodelay       on;
	keepalive_timeout 65;

	location /webdav {
		alias                 /srv/webdav;
		client_body_temp_path /srv/webdav/.tmp;
		client_max_body_size 100G;

		dav_methods PUT DELETE MKCOL COPY MOVE;
		dav_ext_methods PROPFIND OPTIONS LOCK;
		create_full_put_path  on;
		dav_access            group:rw  all:rw;
		autoindex on;
		charset UTF-8;

		allow 192.168.16.0/24;
		deny all;

		rewrite_by_lua_block {
			local directory_requested = is_dir(ngx.var.request_filename)
			
			-- URL should end with "/" if directory requested
			if (directory_requested or ngx.req.get_method() == "MKCOL")
					 and not ngx.re.match(ngx.var.uri, "^.*/$") then
				local uri = ngx.re.sub(ngx.var.uri, "^(.*?)/?$", "$1/")
				ngx.req.set_uri(uri, true)
			end

			local dst = ngx.req.get_headers()["Destination"]
			if dst then
				-- Remove hostname from destination
				dst = ngx.re.sub(dst, "^(https?://.+?)?(/.*)$", "$2")
				-- Rename the folder Destination does not end with a /, it is necessary headers-more-nginx-module
				if directory_requested then
					 dst = ngx.re.sub(dst, "^(.*?)/?$", "$1/")
				end
				ngx.req.set_header("Destination", dst)
			end
			
			-- PROPPATCH no instruction processing PROPFIND.
			if ngx.req.get_method() == "PROPPATCH" then
				ngx.req.set_method(ngx.HTTP_PROPFIND)
			end
		}

		# Stop upload, copy, move, mkdir hidden files
		access_by_lua_block {
			local method = ngx.req.get_method()
			local file = nil

			if (method == "COPY" or method == "MOVE") then
				file = ngx.req.get_headers()["Destination"]
			elseif (method == "PUT" or method == "MKCOL") then
				file = ngx.var.uri
			end

			if (file and ngx.re.match(file, "/\\.[^/]*/?$")) then
				ngx.status = ngx.HTTP_FORBIDDEN
				ngx.exit(ngx.HTTP_FORBIDDEN)
			end
		}
	}
}