Hi, everyone.

I'm experiencing problem while trying to compare publish page versions in EPiServer CMS 6.

Exception Details: System.Web.HttpException: Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <configuration>\<system.web>\<httpModules> section in the application configuration.

Exception is thrown on line that tries to access Session.

I've installed an empty cms 6 website using EPiServer Deployment manager and the same situation. Call like following <%=this.Session["someSessionKey"]%> - throws exception as above.

It proves that exception occures not because my project configuration.

After some "reflectoring" episerver code found following:

EPiServer.UI.Edit.PageCompare.Core.PageComparerProviderBase, EPiServer.UI, Version=6.0.530.0

method: private static string GetHtmlByDummyRequest(string pageUrl)

{
    string str;
    DummyWorkerRequest dummyRequest = GetDummyRequest(pageUrl);
    HttpContext current = HttpContext.Current;
    try
    {
        HttpContext.Current = new HttpContext(dummyRequest);
        HttpContext.Current.User = current.User;
        IHttpHandler handler = (IHttpHandler) BuildManager.CreateInstanceFromVirtualPath(dummyRequest.GetFilePath(), typeof(Page));
        HttpContext.Current.Handler = handler;
        typeof(HttpContext).InvokeMember("_ProfileDelayLoad", BindingFlags.SetField | BindingFlags.NonPublic | BindingFlags.Instance, null, HttpContext.Current, new object[] { true });

        HttpContext.Current.Handler.ProcessRequest(HttpContext.Current);

        HttpContext.Current.Response.Flush();
        str = dummyRequest.OutputWriter.ToString();
    }
    finally
    {
        HttpContext.Current = current;
    }
    return str;
}

During that kind of call Context is not fully initialized and exception happens.


Does anyone know how to handle this situation?

Thanks in advance,
Artem.