[zeromq-dev] Can a broker explicitly deny certain subscriptions to certain clients?

[David Jelenc]

Hi Doron,

many thanks for you suggestion. I did end up using your solution with 
manual subscriptions.

(There was a minor glitch when using it win a broker proxy, but it has 
been fixed.)

Best,
David

On 31. 08. 2015 21:52, Doron Somech wrote:
> You can use xpub manual subscription, you can read more here:
>
> http://somdoron.com/2014/12/token-pubsub/
>
> If for NetMQ but applicable also for zeromq.
>
> On Mon, Aug 31, 2015 at 6:41 PM, David Jelenc
> <david.jelenc at fri.uni-lj.si <mailto:david.jelenc at fri.uni-lj.si>> 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
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