Google Storage: tags can't be read/written

Setting tags via upload_object(..., extra=dict(meta_data=

)) and reading them via get_object('foo').meta_data doesn't work in the Google Storage driver. From what I see in the code this is caused by BaseS3StorageDriver._headers_to_object, which expects the meta data headers to be prefixed with 'x-amz-meta-'. I checked the libcloud debug output and on Google Storage they are prefixed with 'x-goog-meta-'.

Should the Google driver override the method (although it's private) or should BaseS3StorageDriver._headers_to_object accept both prefixes? Or something else? Depending on what the preferred solution is, I would make a pullrequest for this.

Is there ongoing work to have a Google Storage Driver using the native Google API?