22 lines
489 B
JavaScript
Executable File
22 lines
489 B
JavaScript
Executable File
import fs from 'fs/promises'
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export async function assertPdfMagicHeader(filePath) {
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const fh = await fs.open(filePath, 'r')
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try {
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const buf = Buffer.alloc(5)
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await fh.read(buf, 0, 5, 0)
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const header = buf.toString('utf8')
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if (header !== '%PDF-') {
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throw createError({ statusCode: 400, statusMessage: 'Ungültige Datei: kein PDF' })
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}
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} finally {
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await fh.close()
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}
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}
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export function clamp(n, min, max) {
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return Math.max(min, Math.min(max, n))
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}
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