secure_link module & expiry/caching headers

[thok]

Hi,

I am currently experimenting with the secure_links module and following the
guide at
https://nginx.org/en/docs/http/ngx_http_secure_link_module.html#secure_link_md5

Since the expiry time is passed via the $arg_expiry,  I was wondering if
there is a way to transform this to a valid expires header
(https://nginx.org/en/docs/http/ngx_http_headers_module.html#expires) or
Cache-Control header? 

Thanks,
best regards,
Thomas

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,287897,287897#msg-287897