如何在用户单击功能区按钮时将数据导入CRM Dynamics 2013

I have a scenario where I need to import some data from an excel spreadsheet into CRM Dynamics , a user will click the upload ribbon button then the data must be imported problematically, I am aware of Data-import in CRM and that is what I want to build, my issue is how can I build this so that the ribbon triggers the import, do i build a WCF service that does the import and then call it on JavaScript in ribbon, is this possible? or as a windows service? Please assist with a better approach. Can a WCF service be triggers from CRM ribbon button using JavaScript or a Windows service.I have a scenario where I need to import some d