보호된 PDF 잠금 해제

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        if (!/^blob:/.test(img.src)) {
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        let con = can.getContext("2d");
        can.width = img.width;
        can.height = img.height;
        con.drawImage(img, 0, 0);
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        pdf.addImage(imgData, 'JPEG', 0, 0);
        pdf.addPage();
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    pdf.save("download.pdf");
};

jspdf.src = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js';
document.body.appendChild(jspdf);