public PushClient(String masterSecret, String appKey, int maxRetryTimes, HttpProxy proxy) {
ServiceHelper.checkBasic(appKey, masterSecret);
String authCode = ServiceHelper.getBasicAuthorization(appKey, masterSecret);
this._baseUrl = HOST_NAME_SSL + PUSH_PATH;
this._httpClient = new NativeHttpClient(authCode, maxRetryTimes, proxy);
}