# Class Nethttp_client.key_ring

    class key_ring : ?uplink:#key_handler -> ?no_invalidation:bool -> unit -> object .. end

The `key_ring` is a cache for keys. The optional `uplink` handler is invoked when no matching key is found in the cache. The `uplink` is intended for interactively asking the user for a password. If `no_invalidation` is set, keys are never invalidated (removed after they did not work)
Inherits

- `Nethttp_client.key_handler`

    method clear : unit -> unit

Deletes all keys from this key ring

    method add_key : key -> unit

Adds a key to the ring

    method keys : key list

List of all known keys