I have a professional edition org and i want to set sharing rules on Opportunity Object  which is not available. Hence i am looking to go for Apex Managed Sharing. Would it work . If yes please help me with the solution.

Its urgent

I have a ligtning component and have given filter options to select the objects and the filter query.
I am display based on the selection in ligtning component.
Now I want to have a download as csv button which will contain the same records in csv.

I have created a vf page with contentType="text/csv#filename.csv"  and have the same controller which i am using in the lightning component.
But since the methods are static and when I am getting the variables as null.