Developer forum

Hi Lars,

An HTTP handler fired from an AJX call runs independent of Dynamicweb; it's a separate call with its own HTTP Context. Therefore, there is no Pageview from Dynamicweb.

What are you trying to accomplish? There may be other ways to do what you're trying to do.

Cheers,

Imar

Hi Imaar,

I need to get a special price from an eCommerce productlist. When the user enters a quantity for a product, a price is looked up (by an AJAX call) in a custom table in the database, and it should only be possible to look up the price if the user is logged in. Therefore I need the DW context. I thought that making the AJAX call by calling a HTTP handler would be a more clean solution instead of calling a DW page with a DW custommodule on, that would return the special price. Actually I have made this solution now, because I couldn't get the HTTP handler solution to work. But when using the custommodule solution I have to deal with output on the returned page that I don't need (e.g empty lines in the top of the page and a javascript inserted automatically by DW at the bottom of the page). As just mentioned I couldn't make a layout (Designs & Layout) that didn't output anything else than my price! Any idea why?

Hi Nicolai,

thanks for your response. Of course your'e right, manipulating the response will do the trick. But I used Frontend.Extranet (as you suggest) from my HTTP handler and now it works :-)

If anyone else is wondering how to do this with a handler you just need to inherit from IRequriesSessionState

public class SessionHeartbeat : IHttpHandler, IRequiresSessionState 
    {
        HttpContext htc = HttpContext.Current;
        int hoursToKeepAlive = 9;        
        public void ProcessRequest(HttpContext context)
        {
            if (User.GetCurrentUser() != null)
            {
                string sessionKey = "sessionStart|" + User.GetCurrentUser().UserName;
                DateTime? sessionStart = context.Session[sessionKey] as DateTime?;
                if (sessionStart == null)
                {
                    context.Session[sessionKey] = DateTime.Now;

                }
                sessionStart = context.Session[sessionKey] as DateTime?;

                if (DateTime.Now >= sessionStart.Value.AddHours(hoursToKeepAlive))
                {
                    stop(context);
                }
                else
                {//Keep the session alive                    
                    context.Session["KeepAlive"] = DateTime.Now;
                    context.Response.Write("running");
                }
            }
            else
            {
                //no user "safe stop"
                stop(context);
            }
           
        }
        private void stop(HttpContext context)
        {
            context.Response.Write("stop");
            context.Response.End();
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

@Mikkel: Your code example would that be executed for every request to the Dynamicweb Solution?

Hi Sten.

Nope, only when you request the handler