nginScript filesystem access

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Hello

We'd like to move a rather complicated multilingual website over to nginx. I
must determine if we can handle the somewhat involved language based
redirects in nginScript middleware (javascript).

At one point I must redirect based on whether or not a file exists. In the
configuration file I could do this like so:

if (-f $realpath_root$url) {
...
}

However, that doesn't help me since all the redirection logic is in a
javascript function.

How can I do that same test from within the javascript function rather than
in the config file?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,273628,273628#msg-273628