Im trying to implement a gateway with openresty, which put heavy logic in access_by_lua.
As this reply sugguests, I put main logic into run_worker_thread call.
I noticed that
no ngx_lua API can be used in the function_name function
So I move as many of those calls as possible out of the main logic, by fetch information in advance, execute message modifications, deny requests afterwards, etc.. But I wonder is it really impossible to use any of ngx_lua API, say ngx.re.*, ngx.encode_base64, ngx.decode_base64, ngx.escape_uri, ngx.unescape_uri, and even ngx.config.*, ngx.log, ngx.shared.
