afpp/dist/getPdfMetadata.js

Async Fast PDF Parser for Node.js — dependency-light, TypeScript-first, production-ready.

import { getDocument, PDFDateString } from 'pdfjs-dist/legacy/build/pdf.mjs';
import { resolveInput } from './resolveInput.js';
const toOptionalString = (value) => {
    if (typeof value === 'string' && value.length > 0)
        return value;
    return undefined;
};
const toOptionalDate = (value) => {
    if (!value)
        return undefined;
    const date = PDFDateString.toDateObject(value);
    return date ?? undefined;
};
export async function getPdfMetadata(input, options) {
    const documentInitParameters = await resolveInput(input);
    let isEncrypted = false;
    const loadingTask = getDocument(documentInitParameters);
    // PasswordResponses.NEED_PASSWORD = 1, INCORRECT_PASSWORD = 2
    loadingTask.onPassword = (updateCallback, reason) => {
        isEncrypted = true;
        if (reason === 1 && options?.password) {
            updateCallback(options.password);
        }
        else {
            const msg = reason === 2 ? 'Incorrect Password' : 'No password given';
            const err = new Error(msg);
            err.name = 'PasswordException';
            throw err;
        }
    };
    const pdfDocument = await loadingTask.promise;
    try {
        const { numPages } = pdfDocument;
        const { info } = await pdfDocument.getMetadata();
        const record = info;
        return {
            title: toOptionalString(record['Title']),
            author: toOptionalString(record['Author']),
            subject: toOptionalString(record['Subject']),
            creator: toOptionalString(record['Creator']),
            producer: toOptionalString(record['Producer']),
            creationDate: toOptionalDate(record['CreationDate']),
            modificationDate: toOptionalDate(record['ModDate']),
            pageCount: numPages,
            isEncrypted,
        };
    }
    finally {
        await pdfDocument.cleanup();
        await loadingTask.destroy();
    }
}
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