Modifying response body

[Maxim Dounin]

Hello!

On Wed, May 06, 2009 at 12:49:30PM -0700, Joe Van Dyk wrote:

> On Wed, May 6, 2009 at 12:02 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> 
> > Hello!
> >
> > On Wed, May 06, 2009 at 08:57:31AM -0700, Joe Van Dyk wrote:
> >
> > > 2 questions:
> > > Is it possible to return an empty response?  i.e.
> > >   location /empty-response {
> > >     add_header("some-header", "foo-bar");
> > >     # nothing in response body
> > >   }
> >
> > Something like
> >
> >    location /empty-response {
> >        add_header ...;
> >        return 204;
> >    }
> >
> > should work for http-complaint applications (but not some popular
> > browsers).
> 
> 
> I earlier tried returning a 200 and it seemed to hang on me.  Maybe browser
> problem?

No, returning 200 won't do anything good.  For now it will 
basically instruct nginx to "forgot" about request without sending 
anything (pretending reply was already sent).

Returning 204 should work as it returns correct HTTP reply with 
empty content - but AFAIK at least IE have problems with it.

> >  > Is it possible have the response body be only the unique id set by the
> > > userid module?  i.e.
> > >   userid on;
> > >   location /unique-id {
> > >     # response body should be "uid=<cookie's uid>"
> > >   }
> >
> > Either use embedded perl or try http_response module by Kirill
> > Korinskiy (http://catap.ru/downloads/nginx/ngx_http_response-0.3.tar.gz).
> 
> 
> Thanks.  I think I will just proxy the request to a Sinatra app, even though
> I'm losing a lot of performance.  Is that module for nginx 0.6.x?

It should work for both 0.6.* and 0.7.*.

Looks like it doesn't compile with 0.7.53+ due to trivial unused 
function declaration warning though.  But it's really trivial to 
fix even without C knowledge (just remove offending line or 
./configure nginx with --with-cc-opt="-Wno-error").

Maxim Dounin