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ws-reqonet

v2.0.0

Published

Simple WebSocket wrapper with reconnect logic

Downloads

6

Readme

ws-reqonet [formerly ws-rekanet]

Publish

Simple WebSocket wrapper with reconnect logic 💫

Motivation

The Websocket API although effective and simple doesn't provide any reconnection logic. This library aims to solve this shortcoming by providing a mechanism to shore up session_affinity between the client [a web browser] and the server. It also provides a simple queue implementation where data being sent while the connection is broken are bucketed, to be relayed when connection is restored.

Notes

  1. the library is basically a wrapper for native WebSocket class, re-exposing its API.
  2. it's built on browser event interface which allows it to emit native WebSocket events.
  3. well tested with AVA.

🛠 installation

# yarn
yarn add ws-reqonet

# pnpm
pnpm install ws-reqonet

# npm
npm install ws-reqonet

🔱 Usage

import WSReqonet from "ws-reqonet";

const url = `ws://localhost:3001/`;
const protocols = [];
const options = {
  maxRetryAttempts: 10,
  queueMessage: true,
};

// initialize
const wsClient = new WSReqonet(url, protocols, options);

wsClient.on("open", () => {
  console.log("websocket connection established");
});
wsClient.on("message", (event: any) => {
  console.log(event.data);
});
wsClient.on("error", (error: any) => {
  console.log("websocket error", error);
});
wsClient.on("close", () => {
  console.log("websocket connection closed");
});

const payload = { message };
wsClient.send(JSON.stringify(payload));

🎯 API

url

Type: string

protocols

Type: string | string[] Default: []

Either a single protocol string or an array of protocol strings. These strings are used to indicate sub-protocols, so that a single server can implement multiple WebSocket sub-protocols (for example, you might want one server to be able to handle different types of interactions depending on the specified protocol). See more MDN, WhatWG#web-sockets

options

Type: object

maxRetryAttempts

The maximum number of retries - how many attempts at reconnecting

Type: number
Default: 5

queueMessage

Whether to store 'send' data when the connection is broken, which is to be relayed when connection is restored.

Type: boolean
Default: true

disableReconnect

Whether to disable reconnection

Type: boolean
Default: false

debug

Whether to run in debug mode which enables logging to dev tools

Type: boolean
Default: false

events

open, close, message, error

The same as native WebSocket events

reconnection_timeout

Indicates when reconnection attempts timeout.

reconnected

Emitted when reconnection attempt is successful - connection restored