class Falcon::Adapters::Rack

def unwrap_request(request, env)
	if content_type = request.headers.delete('content-type')
		env[CONTENT_TYPE] = content_type
	end
	
	# In some situations we don't know the content length, e.g. when using chunked encoding, or when decompressing the body.
	if body = request.body and length = body.length
		env[CONTENT_LENGTH] = length.to_s
	end
	
	self.unwrap_headers(request.headers, env)
	
	# HTTP/2 prefers `:authority` over `host`, so we do this for backwards compatibility.
	env[HTTP_HOST] ||= request.authority
	
	# This is the HTTP/1 header for the scheme of the request and is used by Rack.
	# Technically it should use the Forwarded header but this is not common yet.
	# https://tools.ietf.org/html/rfc7239#section-5.4
	# https://github.com/rack/rack/issues/1310
	env[HTTP_X_FORWARDED_PROTO] ||= request.scheme
	
	if remote_address = request.remote_address
		env[REMOTE_ADDR] = remote_address.ip_address if remote_address.ip?
	end
end