Read value from Report URL

Hi guys, 

I've done a lot of research but could not find any conclusive data about this. 

We are working on deciding a BI tool for one of our customers. The model is basically a Web App that resides on-premise, which will need to embed a set of Power BI reports, which will be connected to a HANA database in the cloud (SCP). 

This is all achievable, except for one important thing, which is communication between the web app and the embedded report. 

The main challenge is that the HANA models (based on calculation views), they all use HANA input parameters in the lowest level joins to filter data from the bottom. These input parameters are nothing but prompts that you pass to the database when you call a calculation view, and the populated value is used to restrict the SQL clause. 

I know we can call a Power BI report in an iFrame and pass filters to it in the URL, but this only restricts the data set after import, which makes it unusable to us. We would be returning ALL data everytime a user runs the app (hundreds of millions of records). 

Ideally, these input parameters should be part of the embedded report URL so we can give them a value from the web app, but this is not the case. I was thinking that since I'm pretty much limited to URL filters, which consist of table/field value. I could create a dummy table and pass a filter to it, and in theory I should be able to capture those filters from the URL, and assign them to my HANA input paremeters from the query advanced editor. 

For instance, this is the generated syntax for one of my calculation views, regarding input parameters:

let
.......
{
{Cube.ApplyParameter, "IP_TENANT_ID", {{"58"}}},
{Cube.ApplyParameter, "IP_ANHO", {{"2016"}}},
{Cube.ApplyParameter, "IP_MES", {{"06"}}},
{Cube.ApplyParameter, "IP_TIPO_MAT", {{"CERV"}}},
.....
in
#.....

Those starting with "IP" are input parameters. All I need is to capture a value from the URL and assign it dynamically to each of them, so, for instance, IP_TENANT_ID will need to use a variable read from the report URL instead of a hardcoded value.

I also thought of using Power BI parameters but although these can be changed during runtime via DAX, they cannot be parametrized in the URL either.

Any ideas?

Thanks a lot in advance.