How to add S3 widget?

[siphonelee]

Hi,

I'm trying to add a new widget in the (right) side bar to access my S3 bucket, but failed to make it work, like this:

    "defwidget@s3": {
        "display:order": -6,
        "icon": "archive",
        "label": "s3",
        "blockdef": {
            "meta": {
                "view": "preview",
                "file": "s3://bucket/123".  <----  Wrong url format here. How to fix it?
            }
        }
    },

If this is not the correct way to make a S3 connection, what should I do then?

I've searched thru all documents, but can't find a single example. The documents just mentioned that S3 connection was ready to use.

Thank you for your help!