如何使用aws cli更改对象的内容类型？

Question

我在Amazon S3中存储了几个对象,其内容类型我需要更改text/html为application/rss+xml.我认为应该可以使用复制命令执行此操作,为源和目标指定相同的路径.我正在尝试使用AWS cli工具执行此操作,但我收到此错误:

$ aws s3 cp s3://mybucket/feed/ogg/index.html \
            s3://mybucket/feed/ogg/index.html \
            --content-type 'application/rss+xml'
copy failed: s3://mybucket/feed/ogg/index.html
to s3://mybucket/feed/ogg/index.html
A client error (InvalidRequest) occurred when calling the
CopyObject operation: This copy request is illegal because it is
trying to copy an object to itself without changing the object's
metadata, storage class, website redirect location or encryption
attributes.

如果我为源和目标指定不同的路径,我不会收到错误:

$ aws s3 cp s3://mybucket/feed/ogg/index.html \
            s3://mybucket/feed/ogg/index2.html \
            --content-type 'application/rss+xml'
copy: s3://mybucket/feed/ogg/index.html
to s3://mybucket/feed/ogg/index2.html

即使命令成功完成,index2.html也会使用text/html内容类型创建对象,而不是application/rss+xml我指定的类型.

如何修改此命令行以使其工作？

Answer 1

可以使用低级别s3api进行此更改:

$ aws s3api copy-object --bucket archive --content-type "application/rss+xml" \
    --copy-source archive/test/test.html --key test/test.html \
    --metadata-directive "REPLACE"

http://docs.aws.amazon.com/cli/latest/reference/s3api/copy-object.html

问题是无法指定--metadata-directive.感谢您指出公开的问题/功能请求,nelstrom!

Answer 2

您还可以使用更高级别的 API 来实现，方法是将文件复制到其自身，但将其标记为元数据的更改：

aws s3 cp \
  --content-type "application/rss+xml" \
  --metadata-directive REPLACE \
  s3://mybucket/myfile \
  s3://mybucket/myfile