I am trying to implement Google Check out (GCO) on a new server, the process seemed to work fine on the old server.
The error from GCO integration console is the timeout error you might expect if there is load on the server and/or the response takes longer than 3 seconds to respond.
To perform a test (not integrating with my database), I have set some code to send an email to me instead. If I hit the https url manually, I get the email and I can see an output to the screen. If I then leave it as that, Google still returns the Timeout error and I don't get an email. So I have doubts as to whether google is even able to hit the https url.
I did temporarily attempt to use the unsecure url for testing and indeed I received the email, however this solution isn't the route we've developed for, so the problem is something to do with the secure url specifically.
I have looked into the certificate which is a UTN-USERFirst-Hardware which is listed as accepted on http://checkout.google.com/support/sell/bin/answer.py?answer=57856 . I have also tried to temporarily disable the firewall with no joy. Does anyone have any sugestions?
Good to hear you figured out the problem.
I'm adding the links below to add a litle more context for future readers about how Google Checkout uses HTTP Basic Authentication:
http://code.google.com/apis/checkout/developer/Google_Checkout_XML_API.html#urls_for_posting
http://code.google.com/apis/checkout/developer/Google_Checkout_XML_API.html#https_auth_scheme