Add metadata support

[kevinschaul]

It could be useful to have an option allowing files to have metadata associated with them on upload. I'm running into a situation where we'd like to attach different http cache-control headers to files, based on their file extensions.

I imagine the API could involve passing a metadata dict, mapping filename matching regex patterns to a list of key-value tuples defining the metadata.

Any thoughts before I attempt this?

[shakefu]

Assuming you're referring to this metadata, I think passing a dict into the programmatic API works fine.

If you want to implement a command line --option for it as well, I'd suggest using a dict-friendly file format like JSON or YAML as the argument, which would then be passed through to the API.

If you'd like more complex behaviors, I think adding the ability to register before and after hooks, which would be able to modify the Key (and probably also be passed the original filename), would be a solid approach.

[kevinschaul]

That is the metadata I was referring to.

Yes, I agree. I should be able to send a pull request with a rough implementation in the next few days. Thanks!