redux-websocket
Summary
A Redux middleware for managing data over a WebSocket connection.
This middleware uses actions, dispatched with Redux to interact with a WebSocket server including connect, disconnect, message sending, and message receiving. All actions follow the Flux Standard Action model.
Is it any good?
Yes. Yes it is.
Installation
$ npm install @giantmachines/redux-websocket --save
Middleware Installation
Once you have installed the library via npm, you can add it to your Redux middleware stack just like you would any other middleware.
// ... other imports
import websocket from '@giantmachines/redux-websocket'
const app = combineReducers(reducers)
const store = createStore(
app,
applyMiddleware(
websocket,
...
)
)
Available Action Types
The following types are available.
// Action types to be dispatched by the user
WEBSOCKET_CONNECT
WEBSOCKET_DISCONNECT
WEBSOCKET_SEND
// Action types dispatched by the WebSocket implementation.
// These would be caught by reducers or other middleware.
WEBSOCKET_CONNECTING
WEBSOCKET_OPEN
WEBSOCKET_CLOSED
WEBSOCKET_MESSAGE
They can be imported from the standard package and used like so
import { WEBSOCKET_CONNECT } from '@giantmachines/redux-websocket'
store.dispatch({
type: WEBSOCKET_CONNECT,
payload: {
url: 'wss://localhost:8080'
}
})
Actions: User Dispatched
The following actions are to be dispatched by the user. They will be handled by the middleware. All examples are essentially Flow types to show expectations. The constants can (and should) be imported from the library module (see above)
WEBSOCKET_CONNECT
Open a connection to a WebSocket server.
{
type: WEBSOCKET_CONNECT,
payload: {
url: string // something like 'wss://'
}
}
WEBSOCKET_DISCONNECT
Disconnect from a WebSocket server (and cleanup).
{
type: WEBSOCKET_DISCONNECT,
}
WEBSOCKET_SEND
Send a message over an open WebSocket connection. The payload can be an arbitrary JavaScript object or type. The library JSON.stringify() the payload before sending it.
{
type: WEBSOCKET_SEND,
payload: Object|number|string
}
Actions: User Handled
User handled actions correspond to the callbacks on a WebSocket object. These actions are to be handled in app-space at the reducers or in another piece of middleware to handle message parsing and routing.
WEBSOCKET_MESSAGE
Dispatched from redux-websocket when the WebSocket onmessage callback is executed. This action represents discrete messages sent from the server to the client. Its inverse is WEBSOCKET_SEND. The data is a string and it is the client's responsibility to deserialize as necessary. That is, this lib makes no assumptions about the format of the data.
{
type: WEBSOCKET_CLOSED,
payload: {
timestamp: Date,
event: Event,
data: string
}
}
WEBSOCKET_OPEN
Dispatched from redux-websocket when the WebSocket onopen callback is executed. This typically signals a successful connection.
{
type: WEBSOCKET_OPEN,
payload: {
timestamp: Date,
event: Event
}
}
WEBSOCKET_CLOSED
Dispatched from redux-websocket when the WebSocket onclosed callback is executed. This typically signals a disconnecton event. Codes can be found in the event.
{
type: WEBSOCKET_CLOSED,
payload: {
timestamp: Date,
event: Event
}
}
Contributing
If you like this library and would like to make modifications or additions, please fork the repo and issue a pull request. Here are a couple things that we know are needed.
- [ ] Better test coverage
- [ ] More refined Flow types
- [ ] More complete usage examples
