[jax-rs-spec users] [jsr339-experts] Re: Re: Modifying headers from ReaderInterceptor

From: Sergey Beryozkin <>
Date: Thu, 20 Sep 2012 15:51:38 +0100

On 20/09/12 15:45, Bill Burke wrote:
> On 9/20/2012 10:15 AM, Santiago Pericas-Geertsen wrote:
>> On Sep 20, 2012, at 6:17 AM, Sergey Beryozkin wrote:
>>> If MessageBodyReaders had the same capability to modify the input
>>> headers, then it would cause some minor issues I'm referring to below.
>>> Reader interceptors are effectively higher-level MBRs. IMHO that is
>>> another reason why they should not be able to modify the headers
>> Off top of my head I can't think of any UC for which having writable
>> headers in the reader context would be useful.
> Keep it mutable, IMO. I can see wanting to change the content-type (add
> a charset or something) or adding other headers that might trigger
> behavior in the MBR.

Why this can not be done at the filter level ?

What do you think of the concerns I had in the original email ?

I mean, we can just say, whatever, won't really harm to be able to
update the headers from different chains, but it's a duplication, having
two options to do the same thing, it seems to me it is

Cheers, Sergey

> Bill