docs: def getMedia(self, uri):
          """Return a tuple with a media and his content-type. Don't cache anything !"""
  
          r = self.doQuery('media/' + uri)
  
          if r.status_code == 200:
              content_type = 'application/octet-stream'
  
              if 'content-type' in r.headers:
                  content_type = r.headers['content-type']
  
              cache_control = None
  
              if 'cache-control' in r.headers:
                  cache_control = r.headers['cache-control']
  
              return (r.content, content_type, cache_control)
          else:
              return (None, None, None)