I''m trying to code up Rails so that it can talk to the UK Government Gateway using the submission protocol described here http://www.hmrc.gov.uk/schemas/Gateway_Document_Submission_Protocol_V7.0.pdf Essentially it is an asynchronous request/response system that sends XML messages over an HTTPS socket - fairly standard stuff. Now assuming nobody else has already written this thing, I''m going to have to know together some sort of library to handle to protocol. I don''t think the standard SOAP or XMLRPC stuff will do the job. Writing it in a synchronous form is of course fairly straightforward, however from experience I know that the Government Gateway can take an enormous amount of time to respond to a request (even with a simple acknowledgement message), and I don''t really want the controller action to block waiting for the Gateway to respond. Is there a best practice way to code this sort of thing up? TIA Regards Neil Wilson Aldur Systems, UK -- Posted via http://www.ruby-forum.com/.