Sharepoint Web services: How to get permissions for a Document Library for the current user programmatically

Question

I have to use web services to get current users permissions for document libraries in sharepoint. I tried using Permissions.asmx:"GetPermissionCollection" but it only works when the user has Full control.If the user has any other permission(eg:read/contribute) i get 401 error.

I have to create an app where i display all the Document libraries which have Write permission for the current logged in user.

For getting user permissions for a Site, I am using UserGroup.asmx:"GetRolesAndPermissionsForCurrentUser", It is working fine... But it does not work for libraries... :(

Can you please help me with a solution to this issue...I have googled the issue but haven't been able to find an optimum solution.

Thanks and Regards,

Aakanksha

Answer 1

To do this, you'll want to take a slightly different approach. In order to enumerate permissions, users need a high level of access, as you've seen. Instead of using permissions.asmx, use the GetListCollection operation from Lists.asmx. This will return a security trimmed list of lists and libraries the user can access.

Then with those results, you can evaluate the values in the ReadSecurity and WriteSecurity nodes to see what they can do. Here is a reference on what those fields mean. You'll also want to look specifically at items with a server template of 101 (document library).

Answer 2

The information you are looking for is available via the "Check Permissions" button in the document library ribbon.

Also, there are third-party tools that do this, plus more.