Filter System in BSP Application URL?

Hi Experts,

I am creating a sapui5 application which consumes data from a gateway service. From my gateway service I can filter the system in the url perfectly (e.g: ?$filter = sid eq 'EDD'), and I want to do the same thing in my bsp application such as (bc/bsp/myapp/?$filter = sid eq 'EDD') I haven't found anything online so far.

What I managed to do is to set all my systems in a dropdown menu then pass the value selected to the gateway like ( new sap.ui.model.Filter("sid", sap.ui.model.FilterOperator.EQ, "EDD") and it works just fine.

But I want to do the same thing within the bsp app URL.

Any help would be GREATLY appreciated.

Thank you in advance,

Jean Max