Django Instant client

Client for the django-instant websockets backend

npm install djangoinstant
// or
yarn add djangoinstant

Usage

Initialize the client

import { useInstant } from "djangoinstant";

const instant = useInstant();

await instant.init(
    "http://localhost:8000", // backend url
    "ws://localhost:8427", // websockets url
    true // verbosity
)

init structure:

(backendUrl: string, websocketsUrl: string, verbose?: boolean) => Promise<void>

Get a websockets connection authorization

Login with Django and get credentials for websockets:

await instant.login("some_username", "some_password");

If the user is already logged in just get the websockets connection credentials:

await instant.get_token();

Define handlers for messages

Define a handler function and use it for all incoming messages:

import { Message } from "djangoinstant";

function onMessage(msg: Message): void {
  switch (msg.channelName) {
    case "public":
      // process msg
      break;
    case "$users":
      // process msg
      break;
    case "$group1":
      // process msg
      break;
    default:
      throw new Error(`Unknown channel ${msg.channelName}`)
  }
}

instant.onMessage(onMessage);

Message structure:

class Message {
  channelName: string;
  msg: string;
  data: Record<string, any> | Array<any>;
  eventClass: string;
  site: string;
  bucket: string | null;
  date: Date;
}

Connect to the websockets server

await instant.connect();
console.log("Websockets connected");

By default the connect function will subscribe to all the authorized channels for the user provided by the backend. To avoid this use await instant.connect(false). To subscribe later to all channels:

instant.subscribe();

Note: a classic centrifuge-js client is accessible with instant.getClient()

Example

An example with a backend and a frontend is available