Do any APIs/Libraries/tools exist that act as adapters/provider interfaces for accessing different cloud storage services through a common interface? Something similar to ODBC or OLE-DB, except for cloud storage instead of databases.
Such that, if I wrote a front end for taking notes, and I utilized such an API, and let the user provide configuration for which cloud storage provider they have an account with, the API library would handle translating my cloud.Save() call into the commands specific to whiever provider was being utilized. This would allow my front-end app to be cloud storage provider agnostic.
So maybe I wrote some chrome extension or portable thumb drive app for storing notes, or encrypting and storing passwords, or some such, and you tell it which cloud storage provider you have an account with, and it uses it for syncing. This way your use of that tool doesn't tie you to a specific cloud provider. As long as you backup your data, you could migrate to another provider and just reconfigure the app should you become unhappy with that provider or they go bankrupt.
WebDAV for example is one potential candidate since it seems some storage services offer it, but that is not quite what I have in mind, since it depends on the storage providers to offer that as an option. I also don't know enough about WebDAV to know if it really would serve in the capacity I'm imagining. But feel free to post that as an option with pros/cons for comment/discussion.
I more imagine something that is a middle layer external to each cloud provider. Of course since each provider offers a different web service for interacting with files, the middle layer would have adapter for each backend. But on the front-end, it would expose a common API that is provider agnostic.
Does anything of this type exist?
Even just an open source GUI that allows you to store files in any provider, which would imply that in its source code ex