How to get field data of a given pipeline using SM Proxy model?

[mwestphal (Mathieu Westphal (Kitware))]

@joint

Is there a way to do the same with any given source/filter without modifying it?

Not the same. However you can fetch the data with the ClientServerMoveData filter and use GetClientSideObject, keep in mind it can be very costly.

Look for example implementation in vtkSpreadSheetView::StreamToClient()