nginx lua body_filter_by_lua_block need to execute sleep API disabled in the context of content_by_lua*

[Nano NFi]

I need to make body filter sleep before response

    location /configure/result.php {

           body_filter_by_lua_block   {

               --I am using ngx.arg[1] content return here if content contains somevalue then sleep

               --Need to execute sleep code before response =>

               ngx.sleep(60) --API disabled in the context of content_by_lua??

           }

        }

    }

But i cant execute sleep function in body filter API disabled in the context of content_by_lua* is there any other method i can use

I rebuild source code to be able to use sleep function in body filters but it did not work the error "no co ctx was found" some suggestions would really help me i found out that i can use the (echo_sleep 10.0;) from nginx but it does so before the content from server has been requested 

[tokers]

Hello!

Let the body filter phase supports these yield-able APIs need some

cooperations with other modules, say upstream module, for now, the

event pipe API doesn't have special processes when the output filter

returns NGX_AGAIN. Or maybe there are some other fancy mechanism

can achieve this goal :).

Basically There are still a lot of work should be done before we can use

these APIs in the body_filter_by_lua* phase.