nginscript subrequests or way to save vars between requests

[mattw]

In most of the docs for nginscript it talks about how it will not block on
subrequests. But I havent seen any examples on how to perform these
subrequests. Is there a way to do this? Or any way to save a variable
somewhere (over the net, in a file, in memory) between requests? Or are my
scripts limited to using what I can generate in process and info from the
current request?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,275820,275820#msg-275820