payload/dist/utilities/validatePDF.js

Node, React, Headless CMS and Application Framework built on Next.js

export function validatePDF(buffer) {
    // Check for PDF header
    const header = buffer.subarray(0, 8).toString('latin1');
    if (!header.startsWith('%PDF-')) {
        return false;
    }
    // Check for EOF marker and xref table
    const endSize = Math.min(1024, buffer.length);
    const end = buffer.subarray(buffer.length - endSize).toString('latin1');
    if (!end.includes('%%EOF') || !end.includes('xref')) {
        return false;
    }
    return true;
}

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