I would like to use HttpSecureLinkModule to restrict access to some member photos. Now I would like to have the timestamp inside the path but I'm not sure how to implement that.

The timestamp I could get with \/t(\d+)\/ from uri, must I do a rewrite and if yes how? Or exist a "single" operation way?

Photo-URL: www.example.aaa/260/7/4/3/4255/4543535/t1331894408/1234_x.jpg?a=1234567888

location ~ _x\.(jpg|jpeg|gif|png)$ {

secure_link $arg_a,$???;
secure_link_md5 mysecretword$uri$???;

root /media/photos
...
}