With the release of Visual Studio 2013, Microsoft also added a very nice MVC template for remote SharePoint Apps. This is a slightly modifed version of the default MVC5 template, which doesn’t, for example, contain an own authentication provider, but does contain all the stuff like bootstrap and the latest jquery version. Some extra helper files have been added (via a nuget package) to assist in the communication with SharePoint 2013. This does work perfectly with the Actions defined in MVC controllers, but the code doesn’t work together with ApiControllers. Yet 😉 This blogpost shows us how (roughly) the same functionality can be implemented for use with the WebApi controller! At the end, the full source code is provided, it works in azure, as well as with high trust solutions. A good read on the basics of the SharePointContextProvider can be found here and here
Note: the provided code is by no means production ready! I didn’t test it thoroughly, but the basic scenario’s do work!