PayPal and IPN

**Viking** · 9th February 2006, 03:36 PM

Does anyone out there use IPN for Paypal payments on any sites hosted on RFH?

I am using an ASP.NET script as supplied in the Paypal SDK to manage the IPN transaction, but the script is failing.

When I looked up the error it is to do with certificates and the way the ASPNET service account is configured on the server. I am wondering if this is an RFH issue or maybe that I am just dong something wrong.

Thanks, David.

**RFH Reseller: nick** · 9th February 2006, 04:12 PM

I have used it, but with PHP and without ssl. It did work.

**RFH Customer: cswd** · 10th February 2006, 08:20 AM

I know nothing about Paypal but RF is running a medium trust configuration. I'm not sure the Paypal API would be allowed to talk to Paypal in that configuration. Have you got any exception dumps of the failure as I may be able to help more?

**Viking** · 10th February 2006, 08:56 PM

Using the standard ASP.NET sample code supplied on Paypal I get the following error

System.Net.WebException: The underlying connection was closed: Unable to connect to the remote server.
at System.Net.HttpWebRequest.CheckFinalStatus()
at System.Net.HttpWebRequest.EndGetRequestStream(IAsy ncResult asyncResult)
at System.Net.HttpWebRequest.GetRequestStream()
at EveryoneSayCheese.IpnCheeseHandler.Page_Load(Objec t sender, EventArgs e)

The line of code that fails is:

StreamReader stIn = new StreamReader(req.GetResponse().GetResponseStream() );

The paypal forums are littered with people with the same problem. Some people use the same sample code without problem. The host configuration seems to be critical.

Some are linking to here as a possible solution

I tried using a plain ASP page for the paypal processing script but then that is also failing to do with the XML Parser. Again, another host configuration thing.

Now I am investigating a PHP solution and I have even fewer hairs on my head.

Its getting silly. :crying:

**Staff: Warren Ashcroft** · 10th February 2006, 09:21 PM

Originally Posted by Viking

I tried using a plain ASP page for the paypal processing script but then that is also failing to do with the XML Parser. Again, another host configuration thing.

You shouldnt have any problems with ASP?

**RFH Customer: cswd** · 10th February 2006, 09:40 PM

Is Paypal IPN a SOAP request or some proprietary crap?

**Viking** · 11th February 2006, 11:06 AM

Originally Posted by Warren Ashcroft

You shouldnt have any problems with ASP?

Unfortunately I do.

The error I am getting is:

msxml3.dllerror '80072efd'
A connection with the server could not be established /paypal.asp, line 24

The code that is failing is here :

set objHttp = Server.CreateObject("Msxml2.ServerXMLHTTP")
objHttp.open "POST", "https://www.sandbox.paypal.com/cgi-bin/webscr", false
objHttp.setRequestHeader "Content-type", "application/x-www-form-urlencoded"
objHttp.Send str

Various searches have suggested that msxml3.dll is the XML parser :crying:

**Staff: Warren Ashcroft** · 11th February 2006, 06:03 PM

Try changing MSXML2.ServerXMLHTTP to MSXML2.ServerXMLHTTP.4.0

I have had issues with MSXML and HTTPS calls in the past... Usually its caused because the MSXML HTTP engine is powered by Internet Explorer and when you connect to an HTTPS site you get that popup "You are about to connect to a secure site" in the virtual windows session.

Other times its caused by some client side SSL certificate problem...

**Viking** · 11th February 2006, 06:09 PM

Thanks for that Warren, but unfortunately I now get a slighly different error

msxml4.dll error '80072efd'
A connection with the server could not be established

Its msxml4 rather than msxml3 now. Error code remains the same.

Any ideas?