protected void Page_PreInit(object sender, EventArgs e)
{
Uri redirectUrl;
switch (SharePointContextProvider.CheckRedirectionStatus(Context, out redirectUrl))
{
case RedirectionStatus.Ok:
return;
case RedirectionStatus.ShouldRedirect:
Response.Redirect(redirectUrl.AbsoluteUri, endResponse: true);
break;
case RedirectionStatus.CanNotRedirect:
Response.Write("An error occurred while processing your request.");
Response.End();
break;
}
}
/// <summary>
/// Registers the specified SharePointContextProvider instance as current.
/// It should be called by Application_Start() in Global.asax.
/// </summary>
/// <param name="provider">The SharePointContextProvider to be set as current.</param>
public static void Register(SharePointContextProvider provider)
{
if (provider == null)
{
throw new ArgumentNullException("provider");
}
SharePointContextProvider.current = provider;
}
/// <summary>
/// Initializes the default SharePointContextProvider instance.
/// </summary>
static SharePointContextProvider()
{
if (!TokenHelper.IsHighTrustApp())
{
SharePointContextProvider.current = new SharePointAcsContextProvider();
}
else
{
SharePointContextProvider.current = new SharePointHighTrustContextProvider();
}
}