code: def _retrieve(self, map):
          
          self._conn.request('GET', "cache_object://%s/%s" % (self._host, map), 
                             None, self._httpHeaders)
          rp = self._conn.getresponse()
          if rp.status == 200:
              data = rp.read()
              return data
          else:
              raise Exception("Retrieval of stats from Squid Proxy Server"
                              "on host %s and port %s failed.\n"
                              "HTTP - Status: %s    Reason: %s" 
                              % (self._host, self._port, rp.status, rp.reason))
docs: Query Squid Proxy Server Manager Interface for stats.
          
          @param map: Statistics map name.
          @return:    Dictionary of query results.