@Override
  public String buildAuthorizationUrl(String redirectUri, String state) {
    String url = "https://open.weixin.qq.com/connect/oauth2/authorize?";
    url += "appid=" + this.mainService.getWxCpConfigStorage().getCorpId();
    url += "&redirect_uri=" + URIUtil.encodeURIComponent(redirectUri);
    url += "&response_type=code";
    url += "&scope=snsapi_base";
    if (state != null) {
      url += "&state=" + state;
    }
    url += "#wechat_redirect";
    return url;
  }

  @Override
  public String[] getUserInfo(Integer agentId, String code) throws WxErrorException {
    String url = String.format("https://qyapi.weixin.qq.com/cgi-bin/user/getuserinfo?code=%s&agentid=%d",
      code, agentId);
    String responseText = this.mainService.get(url, null);
    JsonElement je = new JsonParser().parse(responseText);
    JsonObject jo = je.getAsJsonObject();
    return new String[]{GsonHelper.getString(jo, "UserId"),
      GsonHelper.getString(jo, "DeviceId"),
      GsonHelper.getString(jo, "OpenId")};
  }