web-print-pdf/dist/components/Websocket.js

A powerful web HTML printing library that converts HTML to PDF and prints. Support multiple formats, batch printing, and WebSocket communication. Perfect for web applications needing print functionality.

export default class Socket {
    constructor() {
        this.send = (obj = {}) => {
            if (Object.prototype.toString.call(obj) === "[object Object]") {
                this.ws.send(JSON.stringify(obj));
            }
        };
        this.close = () => {
            this.isConnected = true;
            this.ws.close();
        };
        this.options = null;
        this.ws = null;
        this.isConnected = false;
        this.isDestroyed = false;
        this.retryTimes = 0;
    }
    init(options = {}) {
        this.options = options;
        const { url, onOpen, onMessage, onClose, onError, maxRetries = 5, } = options;
        this.ws = new WebSocket(url);
        this.ws.onopen = (e) => {
            this.isConnected = true;
            this.isDestroyed = false;
            this.retryTimes = 0;
            onOpen && onOpen(e);
        };
        if (onMessage) {
            this.ws.onmessage = onMessage;
        }
        this.ws.onclose = (e) => {
            if (this.isConnected) {
                if (this.retryTimes < maxRetries) {
                    this.retryTimes += 1;
                    this.init(this.options);
                }
                else {
                    this.isConnected = false;
                    this.isDestroyed = true;
                    onClose && onClose(e);
                }
            }
            else {
                this.isDestroyed = true;
                onClose && onClose(e);
            }
        };
        this.ws.onerror = (e) => {
            onError && onError(e);
        };
        return this.ws;
    }
}
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