public HttpResponseMessage GetFileInfo(FileInVm vm)
{
if (vm == null)
{
vm = new FileInVm();
}
var appName = GetAppNameByGuid(vm.AppGuid);
var stream = _sourceProvider.GetFileStream(appName);
return(Request.CreateResponse(HttpStatusCode.OK, new FileOutVm(GetHash(stream), appName)));
}