disable chunked transfer-encoding

[dorian taylor <dorian.taylor@gmail.com>]

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Hi,

I'm trying to use Rack as a FastCGI authorizer (cf 
https://github.com/fast-cgi/spec/blob/master/spec.md#63-authorizer ) in 
conjunction with Apache mod_authnz_fcgi 
(https://httpd.apache.org/docs/2.4/mod/mod_authnz_fcgi.html ). My problem 
is that mod_authnz_fcgi insists on a 200 status code and *only* a 200 
status code to communicate any results from the fastcgi script back up the 
line. This is where Rack::Chunked is ruining my day: it forces the choice 
of either a Content-Length header (which is transmitted upstream and 
truncates the output), or a Transfer-Encoding: chunked header where the 
accompanying *token* is removed upstream, resulting in a protocol error.

I would like to be able to express an HTTP 200 response that has neither a 
Content-Length nor a Transfer-Encoding header. Is there any way to disable 
Rack::Chunked for certain responses?

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