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拿到qnetworkreply后,先检查http状态码,使用里面的QVariant attribute(QNetworkRequest::Attribute code) const
参数如下:
1. 先用QNetworkRequest::HttpStatusCodeAttribute,可得到http状态码,如果是302
2. 再用QNetworkRequest::RedirectionTargetAttribute,即可得到跳转地址
具体请查看QNetworkReply Classs,qt4和qt5一样