This monkey patch allows for applications to perform their own chunking through WEBrick::HTTPResponse iff rack is set to true.
# File lib/rack/handler/webrick.rb, line 11 def setup_header app_chunking = rack && @header['transfer-encoding'] == 'chunked' @chunked = app_chunking if app_chunking _rack_setup_header @chunked = false if app_chunking end