[undertow-dev] Changing headers on proxy response

[Jeff Williams]

Thanks, that worked perfectly for now.

Jeff

On 3 November 2014 08:57, Stuart Douglas <sdouglas at redhat.com> wrote:

> You just return the original conduit, but set the headers in the wrapper
> class itself.
>
> Stuart
>
> ----- Original Message -----
> > From: "Jeff Williams" <jeffw at wherethebitsroam.com>
> > To: "Stuart Douglas" <sdouglas at redhat.com>
> > Cc: undertow-dev at lists.jboss.org
> > Sent: Monday, 3 November, 2014 6:34:28 PM
> > Subject: Re: [undertow-dev] Changing headers on proxy response
> >
> > Stuart,
> >
> > Thanks for that. I'm guessing I can just extend
> > org.xnio.conduits.AbstractStreamSinkConduit<StreamSinkConduit> and just
> > pass everything through to next? Since there is not much information
> around
> > about the StreamSinkConduit, where would be the best place to add the
> > headers? In the first call to one of the transferFrom methods?
> >
> > I've added a JIRA for this: https://issues.jboss.org/browse/UNDERTOW-340
> >
> > Regards,
> > Jeff
> >
> > On 2 November 2014 04:24, Stuart Douglas <sdouglas at redhat.com> wrote:
> >
> > > You can set them in a response wrapper
> > > (io.undertow.server.HttpServerExchange#addResponseWrapper) and they
> should
> > > not be overriden, although this is not ideal.
> > >
> > > If you file a JIRA I will look at adding better support for this into
> the
> > > proxy.
> > >
> > > Stuart
> > >
> > > ----- Original Message -----
> > > > From: "Jeff Williams" <jeffw at wherethebitsroam.com>
> > > > To: undertow-dev at lists.jboss.org
> > > > Sent: Saturday, 1 November, 2014 12:43:38 AM
> > > > Subject: [undertow-dev] Changing headers on proxy response
> > > >
> > > > Hi,
> > > >
> > > > I am currently using a customer handler wrapping the proxy handler. I
> > > want to
> > > > set some response headers from my handler, but if they exist in the
> > > response
> > > > from the proxy's backend, they are overridden. Example code:
> > > >
> > > > Undertow.builder()
> > > > .addHttpListener(8080, "localhost")
> > > > .setHandler(new MyHandler(new ProxyHandler(proxy, 30000,
> > > ResponseCodeHandler.
> > > > HANDLE_404 ))).build();
> > > >
> > > > class MyHandler extends HttpHandler {
> > > > private static final HttpString ACCESS_CONTROL_EXPOSE_HEADERS = new
> > > > HttpString("Access-Control-Expose-Headers");
> > > > private HTTPHandler next;
> > > > public MyHandler(HttpHandler next) {
> > > > this.next = next;
> > > > }
> > > > p ublic void handleRequest(HttpServerExchange exchange ) throws
> > > Exception {
> > > > exchange .getResponseHeaders().put( ACCESS_CONTROL_EXPOSE_HEADERS ,
> " new
> > > > ACEH" );
> > > > }
> > > > }
> > > >
> > > > The problem here is that the backend server responds with an
> > > > Access-Control-Expose-Headers header and that replaces the one I set
> in
> > > > MyHandler.
> > > >
> > > > Is there any way I can change headers after proxy has received the
> > > response
> > > > from backend and before it starts sending the response to the client?
> > > >
> > > > Regards,
> > > > Jeff
> > > >
> > > >
> > > > _______________________________________________
> > > > undertow-dev mailing list
> > > > undertow-dev at lists.jboss.org
> > > > https://lists.jboss.org/mailman/listinfo/undertow-dev
> > >
> >
>
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