> But other than openresty, i didn't see any implementation inside nginx to
> split any word or cookie.

You can possibly use rewrite http://wiki.nginx.org/HttpRewriteModule (
http://nginx.org/en/docs/http/ngx_http_rewrite_module.html )

There is also an example to rewrite /photos/123456 to something like
/path/to/photos/12/1234/123456.png

rr

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