Is there a way to touch() a file in Amazon S3?
amazon-s3, last-modified, metadata
Solution
In response to @Daniel Golden's comment on @tkotisis answer. It looks like at least the AWS CLI tools do not let you copy an item on to itself. You can however 'force' a copy by updating the metadata.
$ aws s3 cp --metadata '{"touched":"now"}' s3://path/to/object s3://path/to/object
This recreates the object (downloads to the caller and reuploads it) replacing its content, owner and metadata. This will also trigger any attached Lambda events.
Problem
I'm currently working with Amazon S3 and I am writing a program that uses the modified dates. I'm looking for a way to edit the modified dates. I could loop trough all the files and save them as they are, but this sounds like a bad solution. In PHP there is this function touch(). Does anyone know a solution, or has the same problem?