Skip to main content
Version: 0.1.4

Kabelwerk Context

The Kabelwerk context takes care of opening and maintaining the websocket connection to the Kabelwerk backend — also across AppState changes.

Most components in this SDK depend on this context and should be wrapped by a configured <KabelwerkProvider> in order to function.

Example​

<KabelwerkProvider
  url="myapp.kabelwerk.io"
  refreshToken={fetchAuthToken}
  logging={__DEV__ ? 'info' : 'silent'}
  onError={handleError}
>
  {/* chat screens */}
</KabelwerkProvider>

Props​

url​

The URL of the Kabelwerk backend to connect to.

token​

A JWT token which:

  • is signed by an RSA key the public counterpart of which is known to the Kabelwerk backend you are connecting to;
  • includes a sub claim identifying the user on behalf of whom the connection is established;
  • includes a valid exp claim.

The value of the sub claim is stored on the Kabelwerk backend as the respective user's key.

refreshToken​

A function that takes as argument the current authentication token and returns a Promise resolving into a new authentication token (or perhaps the same token if no refresh is needed). If you provide only a token, it will be used both for the initial connection and then again each time when reconnecting. If you provide only a refreshToken function, it will be called to obtain the initial connection token, and then it will be called again each time when reconnecting. If you provide both a token and a refreshToken function, then the former will be used for the initial connection, and the latter each time when reconnecting.

userName​

A name for the connected user. The default value is 'anonymous'.

ensureRooms​

If this prop is set, Kabelwerk will make sure that the connected user has a room on each of the specified hubs. The value could be either a list of hub slugs or the string 'all' — in which case a room is created for the user on every hub. If Kabelwerk fails to ensure that the rooms are created (e.g. if there does not exists a hub with one of the given slugs), the onError handler is called and the connection is terminated.

logging​

One of the (case-insensitive) strings 'debug', 'info', 'error', or 'silent'. The last one is the default value, meaning that no logs will be written unless this prop is explicitly set to another value.

onError​

Called when there is an error.

onNotification​

Called when a new message is posted in any of the rooms of the connected user (of course, excluding messages authored by the latter). In case the websocket connection temporarily drops, upon reconnecting the callback will be invoked for each message missed while the client was disconnected.

See also​