How to get the content of a POST with Content-type application/octet-stream with tornado

tornado_octet-stream.py

class EntryListHandler(tornado.web.RequestHandler):

    def post(self, ressource_name):
        # Get file content and mime type
        fileContent  = None
        try:
            fileContent =  self.request.files['fname'][0]['body']                                                             
        except Exception, e:
            if self.request.headers.has_key('Content-Type') and self.request.headers['Content-Type'].startswith("application/octet-stream"):
                fileContent = self.request.body