[PowerBar]

Whether JavaScript qualifies as a "proper embedded language" is up for debate, but nginx does support it for dynamic request handling. https://www.nginx.com/blog/introduction-nginscript/

[mhitza]

That link is interesting for two reasons. First because of the feature you mentioned, and second because there is apparently a community lua module (nginx module implementation must be interesting if you can just attach a deeply embedded language via a module)

Somehow this didn't pop up on our search results (a couple of years back) when we were dealing with some tricky redirection patterns we had to implement. Would have made things much easier.