Download documents from docer sites bypassing paywall

Docer Document Downloader.user.js

// ==UserScript==
// @name         Docer Document Downloader (Multi-site)
// @namespace    http://tampermonkey.net/
// @version      2
// @description  Intercepts document URLs from various Docer sites and creates a direct download link
// @author       seszele64
// @match        https://docer.pl/*
// @match        https://docer.com.ar/*
// @match        https://docer.ar/*
// @match        https://doceru.com/*
// @match        https://docero.de/*
// @grant        GM_log
// @updateURL    https://gist.github.com/seszele64/011bd8a049d11fc9579d93afafa0367c/raw/Docer%20Document%20Downloader.user.js
// @downloadURL  https://gist.github.com/seszele64/011bd8a049d11fc9579d93afafa0367c/raw/Docer%20Document%20Downloader.user.js
// ==/UserScript==

(function() {
    'use strict';

    const SUPPORTED_DOMAINS = ['docer.pl', 'docer.com.ar', 'docer.ar', 'doceru.com', 'docero.de'];

    function debug(message) {
        GM_log('[Docer Debug] ' + message);
        console.log('[Docer Debug] ' + message);
    }

    function createDownloadLink(url) {
        debug('Creating download link for URL: ' + url);
        
        // Parse the URL to get the direct PDF link
        let directPdfUrl = url;
        try {
            const parsedUrl = new URL(url);
            const embeddedUrl = parsedUrl.searchParams.get('url');
            if (embeddedUrl) {
                directPdfUrl = decodeURIComponent(embeddedUrl);
            }
        } catch (e) {
            debug('Error parsing URL: ' + e.message);
        }
        
        debug('Direct PDF URL: ' + directPdfUrl);

        const linkContainer = document.createElement('div');
        linkContainer.style.position = 'fixed';
        linkContainer.style.top = '10px';
        linkContainer.style.right = '10px';
        linkContainer.style.zIndex = '9999';
        linkContainer.style.backgroundColor = 'white';
        linkContainer.style.padding = '10px';
        linkContainer.style.border = '1px solid black';

        const link = document.createElement('a');
        link.href = directPdfUrl;
        link.textContent = 'Download Document';
        link.style.color = 'blue';
        link.style.textDecoration = 'underline';
        link.setAttribute('download', '');

        linkContainer.appendChild(link);
        document.body.appendChild(linkContainer);
    }

    // Intercept all XHR requests
    const originalOpen = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function() {
        const url = arguments[1];
        debug('XHR request intercepted: ' + url);
        
        if (url.includes('/start/show')) {
            this.addEventListener('load', function() {
                debug('XHR response received for: ' + this.responseURL);
                debug('Response status: ' + this.status);
                debug('Response type: ' + this.responseType);
                
                if (this.responseType === '' || this.responseType === 'text') {
                    debug('Response text: ' + this.responseText);
                    try {
                        const data = JSON.parse(this.responseText);
                        debug('Parsed JSON: ' + JSON.stringify(data));
                        if (data.response && data.response.url) {
                            const pdfUrl = data.response.url;
                            debug('PDF URL found: ' + pdfUrl);
                            createDownloadLink(pdfUrl);
                        } else {
                            debug('PDF URL not found in response');
                        }
                    } catch (e) {
                        debug('Error parsing JSON: ' + e.message);
                    }
                } else {
                    debug('Response is not text, cannot parse');
                }
            });
        }
        
        return originalOpen.apply(this, arguments);
    };

    debug('Docer PDF Downloader script is active (Multi-site version)');
})();

NOT WORKING