[reSIProcate] How to respond to garbage requests

[Alan Hawrylyshen]

On Aug 15, 2006, at 09.20, Byron Campen wrote:

> 	When forming a 400 Bad Request response, is it better to leave out  
> mandatory headers that were malformed in the request, or leave the  
> malformed headers in the response exactly as they appeared in the  
> request?

How long is a piece of string?

Seriously, I would argue in favor of leaving them in. The assumption  
I'm making is that the sender will be able to handle a response that  
is closely related to the garbage it spit out. If you remove  
mandatory headers that were malformed, you run the risk of exposing  
yet another bug / problem in the recipient UA.  This could be a  
somewhat specious argument though, so you can likely build a case for  
either side.

A