DECLINE, ERRORs in the middle of hanlers stack

[Ruslan U. Zakirov]

        Hello All!
"Stacked handlers" is a very useful technology, but as I think incomplete.
I need some suggestions.
My project split content handler in the few parts. And each handler
send part of the requested page to user, but sometimes I must stop
proccessing and return DECLINE, redirect user or return some ERROR.
Error appear in the middle of the page.
I want Apache to buffer content and send it after last handler in
chain return OK. Is it possible?
      Beforehead thanks, Ruslan.