code: def get_message_content(self):
          
          body = self.doc.find(
              ".//{http://salmon-protocol.org/ns/magic-env}data").text
  
          body = urlsafe_b64decode(body.encode("ascii"))
  
          logger.debug("diaspora.protocol.get_message_content: %s", body)
          return body
docs: Given the Slap XML, extract out the payload.