# http://www.tianyun.com/a/b/c
# $1: /a/b
# $2: c
# http://$host$1$2$3/

location /a/b/c {
	root /usr/share/nginx/html;
	if ( -d $request_filename ) {
		rewrite ^(.*)([^/])$ $1$2/ permanent;
	}
}