title: How do you resolve a virtual path to a file under an OWIN host?
body: <p>Under ASP.NET and IIS, if I have a virtual path in the form "~/content", I can resolve this to  a physical location using the <a href="http://msdn.microsoft.com/en-us/library/system.web.httpserverutility.mappath%28v=vs.110%29.aspx">MapPath</a> method:</p>
  
  <pre><code>HttpContext.Server.MapPath("~/content");
  </code></pre>
  
  <p>How can you resolve a virtual paths to a physical location under an OWIN host?</p>