Pieter, many thanks for your advice. If I may ask -- would it be possible to shed a bit more thoughts on the matter, since I'm not sure that I fully understand your take.
Are you suggesting that I replace PUB-XSUB and XPUB-SUB combos with ROUTER-DEALER or that I bridge (inside broker) XSUB to DEALER and ROUTER to XPUB? In the second case, I don't see how this would help. Since I can already see subscription messages, I can already simply ignore (not forward from XPUB to XSUB) unauthorized subscription messages. However this achieves half the job: it still subscribes an unauthorized client to the broker, but it does not forward subscriptions to other publishers. (But if at some later time, another client--that is authorized to subscribe to this topic--also subscribes, both subscribers will receive messages.) Best, David On 31. 08. 2015 18:08, Pieter Hintjens wrote: > You can do this using a dealer to router pattern and your own routing > logic in the broker. Malamute provides a lot of this, though does not > yet do per access control to topics. > > Pieter > > On 31 Aug 2015 17:42, "David Jelenc" <[email protected] > <mailto:[email protected]>> wrote: > > Hi, > > I'm wondering if there is a way to explicitly deny a certain client from > subscribing to a certain topic. > > I have a broker set up, where some clients publish and other subscribe. > > client client > PUBLISHER -------- BROKER -------- SUBSCRIBER > > PUB --- (XSUB | broker logic | XPUB) --- SUB > > Since I'm using a XPUB socket on the broker, I can see all subscription > and subscription cancellation messages. However, once these messages > reach broker, the client is already subscribed. > > Is there any way on how I can prevent a client from subscribing to > certain topics (while allowing the same client to subscribe to some > other) and enforce this on the broker side (in the broker logic)? > > Any help would be greatly appreciated. > > Best, > David _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
