wsabi

Wsabi is a layer which allows you to call Hapi http endpoints from websockets, basically serving as a bridge between Socket.io and Hapi's server.inject. It was originally built to be backwards compatible with the Sails.js websocket system, during a backend port.

Usage

To Wsabi, simply register it on your server.

server.register({ register: require('wsabi') }, function (err) {
    // ...
});

Options:

• io defaults to an empty object. List of options to pass to the socket.io server,
• cookies defaults to "true". Determines whether Wsabi should "manage" the session cookies for you - see the note below.
• sticky defaults to []. Should be an array of headers you want to keep from the handshake and pass directly into the server. Setting sticky to ["x-forwarded-for"] may be useful. The client will not be able to overwrite these.
• strip defaults to []. Should be an array of headers you don't care to send back down to the client over websockets.
• errors is an object
  • required is the reply sent if sockets are required on the route, but it's accessed over HTTP. Defaults to a Boom.badRequest instance.
  • disabled is the reply sent if sockets are disabled on the route and it's attempted to be accessed over sockets. Defaults to a Boom.badRequest instance.

After this, you can then connect to your server using any supported client library, including:

• Sails.io.js.
• More to come?

Routes also have their own options that you can pass in the plugin config:

• required defaults to false: setting it to true will cause an error to be sent if the socket is accessed over plain HTTP.
• enabled defaults to true: setting it to false will cause an error to be sent if the socket is accessed over websockets.
• errors object can be passed in for custom error overrides.

// Example of a route with wsabi disabled:
server.route({
    method: 'GET',
    path: '/',
    config: {
        plugins: { wsabi: { enabled: false }}
    }
    // ...
})

If you'd like to access the websocket itself in your request, you can access req.websocket. That may also be used for checking if a route is running under websockets.

You can also access the socket.io server directly after registration via server.plugins.wsabi.io.

A Note About Sessions

The session "state" is stored on the socket connection. Cookies passed in the initial Socket.io handshake request will be passed on automatically in every request on that socket. If a response includes a set-cookie header, we'll update the stored cookie jar, and if you send in a request with a Cookie header then the cookie jar will be updated appropriately.

You can disable handling of cookies by passing cookies: false in the plugin config. When disabled, only the cookies explicitly sent on each request will be used.

License

This software is MIT licensed, copyright 2016 by Beam Interactive, Inc.

Why the name?

Because it's Hapi websockets, and if you say "WS Hapi" quickly several times it sounds like "wasabi". Wasabi itself was already taken on npm, so we have wsabi! Oh, and because sushi is awesome.