This handler makes a SOAP call (using Savon) to the SharePoint Web Services to create a new site under the given homepage url. After configuring Savon to work with the given account credentials (make sure that the account has permission to create a site), the Site Template value is modified so SharePoint will recognize it. The inputted information is then passed to SharePoint via a SOAP call, where the Site is created with the given url appended to the homepage url. The newly created Site will not appear in the quick launch or top link bar of the parent website, so it will be needed to manually added before it shows up there. Any errors that occur during this process will be caught and re-raised by the handler. Authentication is done through SSL, so the SharePoint site being accessed needs to be setup to allow SSL connections.
Make sure the SharePoint Web Services database is turned on.