Restrict users to view or download document from a document library.

Hi All,

Hope you are all doing good.

I have following requirement :

In one of the application document library we have to restrict a specific SharePoint Group users to view only the metadata of the document library item and they are not allowed to view or download the document.

I though of following solutions:

1. Create Custom web part to show the document library items and on click show properties of that particular item.

2. HTTP Module 

I cannot go ahead with first solution because users should be able to search the document library items using FAST Search, then it will become complex to provide that functionality to restrict users to view only metadata properties.

Before going ahead with HTTP Module i would like to check any possible solution.

So guys, if someone already worked on similar requirement or any solution you think of please let me know. Your all inputs and comments on this will help me to build a appropriate solution.

Thanks

P