OssObject读取文件的大小有限制？

支持一下

如果文件太大，可以分片上傳

obj.Content类型是网络流，一次读的字节数不定，需要循环调用read函数
using (var requestStream = o.Content)
                   {
                       byte[] buf = new byte[1024];
                       var fs = File.Open(fileToDownload, FileMode.OpenOrCreate);
                       var len = 0;
                       while ((len = requestStream.Read(buf, 0, 1024)) != 0)
                       {
                           fs.Write(buf, 0, len);
                       }
                       fs.Close();
                       Console.WriteLine("GetObject done.");
                   }