docs: def update(self, url, data):
          """ update ressources store into LinShare."""
          url = self.get_full_url(url)
          self.log.debug("update url : " + url)
          # Building request
          post_data = json.dumps(data).encode("UTF-8")
          request = urllib2.Request(url, post_data)
          request.add_header('Content-Type', 'application/json; charset=UTF-8')
          request.add_header('Accept', 'application/json')
          request.get_method = lambda: 'PUT'
          # Do request
          ret = self.do_request(request)
          self.log.debug("""put url : %(url)s : request time : %(time)s""",
                         {"url": url,
                          "time": self.last_req_time})
          return ret