src/tools/telemetry/telemetry/core/backends/chrome/system_info_backend.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 from telemetry.core import camel_case
   6 from telemetry.core import system_info
   7 from telemetry.core.backends.chrome import websocket_browser_connection
   8
   9
  10 class SystemInfoBackend(object):
  11   def __init__(self, devtools_port):
  12     self._conn = websocket_browser_connection.WebSocketBrowserConnection(
  13         devtools_port)
  14     self._system_info = None
  15
  16   def GetSystemInfo(self, timeout=10):
  17     if not self._system_info:
  18       req = {'method': 'SystemInfo.getInfo'}
  19       try:
  20         res = self._conn.SyncRequest(req, timeout)
  21         if 'error' in res:
  22           return None
  23         self._system_info = system_info.SystemInfo.FromDict(
  24             camel_case.ToUnderscore(res['result']))
  25       finally:
  26         self._conn.Close()
  27     return self._system_info