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https://aws.amazon.com/cn/documentation/s3/?id=docs_gateway
https://www.cnblogs.com/blackice/p/5584388.html
http://aliyun_portal_storage.oss.aliyuncs.com/oss_api/oss_javahtml/multipart.html
https://www.nuget.org/packages/AWSSDK.S3/
https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/dev/LLuploadFileDotNet.html