问题
With s3cmd sync command I can backup encrypted files on S3 to local storage. When trying to restore these files back to S3 I have to set metadata like x-amz-meta-x-amz-key and x-amz-meta-x-amz-iv for each file. My question is how to use s3cmd for retrieve metadata of an object on Amazon S3?
回答1:
Upstream github.com/s3tools/s3cmd master branch has this commit now which does emit all metadata in the info command.
commit 36352241089e9b9661d9ee586dc19085f4bb13c9 Author: Andrew Gaul Date: Tue Mar 10 04:36:04 2015 -0700
Emit user metadata in object info
回答2:
I couldn't find a built in way to get the Cache-Control headers for an object using s3cmd specifically. s3cmd info doesn't seem to include that information.
However using the --debug flag I was able to see all the headers:
$ s3cmd --debug info s3://ninja-gant-rob/styles.ea647039fe7f7c99fe55.css 2>&1 | grep -i 'cache-control'
'cache-control': 'max-age=31536000',
来源：https://stackoverflow.com/questions/21121262/can-s3cmd-retrieve-metadata-of-an-object-on-amazon-s3