问题描述
是否可以为具有特定版本的S3对象创建签名的URL。
的想法是为所有版本的图像使用相同的图像名称，但签名的URL不同。
Is it possible to create a signed URL for S3 object with particular version.The idea is to have the same image name but different signed url for all the versions of the image.
推荐答案
是的。
以下是一些指向特定对象版本的示例预签名URL，它们具有新旧的签名格式：
Here are some sample pre-signed URLs that point to a particular object version, with old and new signature format:
http://mybucket.s3-ap-southeast-2.amazonaws.com/cat.jpg?versionId=XXX&AWSAccessKeyId=YYY&Expires=1458463363&Signature=ZZZ
https://s3-ap-southeast-2.amazonaws.com/mybucket/cat.jpg?versionId=XXX&X-Amz-Date=20160319T084413Z&X-Amz-Expires=300&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Signature=VVV3&X-Amz-Credential=YYY/20160319/ap-southeast-2/s3/aws4_request&X-Amz-SignedHeaders=Host&x-amz-security-token=ZZZ
您可以在S3控制台中看到它的作用-只是创建一个版本控制的文件，然后选择操作/打开。
You can see this in action in the S3 console -- just create a versioned file, then choose Actions/Open. It will generate a signed URL for the given version of the object.
关于如何编写此代码……我不确定！但是，我确实验证了一个版本的签名不能与另一版本一起使用。
As to how to code this... I'm not sure! However, I did verify that a signature for one version will not work with another version.
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