run log_by_lua before the access log

[calind]

I think a better behavior of log_by_lua would be to run before access_log so that it can set some variables which can be written afterward by access_log.

For example one can do a json econde of data he wants to be logged and then let access log to write the log. This way you can simply have your data in logs already in json format and you don't need to to a translation from log format to json.

[agentzh]

Please try out the following patch for ngx_lua which ensures that log_by_lua is always the first handler in the log phase:

http://openresty.org/download/ngx-lua-log-phase-hack.patch

Thanks!

[agentzh]

I've just committed a modified version of the patch to git master. Please try it out :)

[agentzh]

Consider it resolved.