Create middleware from API xml-rpc methode to json restfull API

Hi i need middleware script to convert message from XML-RPC to json restfull, the idea is, script as middleware received message from xml-rpc parameter and convert message to our partner API use json restfull API, all result from json will convert back to xml-rpc parameter, and log in, out and result log save it to database and create page for view, for flowchart see attachment thanks