Erro AcroForm

[erickximenes]

My code:

doc = new PDFDocument({ autoFirstPage: true, size: 'A4', margins: { top: 90, bottom: 80, left: 72, right: 72 }, layout: 'portrait', bufferPages: true, }); let fieldIds = [], form; const signatureLength = 8192, byteRangePlaceholder = '**', signature = doc.ref({ Type: 'Sig', Filter: 'Adobe.PPKLite', SubFilter: 'adbe.pkcs7.detached', ByteRange: [ 0, byteRangePlaceholder, byteRangePlaceholder, byteRangePlaceholder ], Contents: Buffer.from(String.fromCharCode(0).repeat(signatureLength)), Reason: new String("Blabla"), M: new Date(), ContactInfo: new String("bla@bla.pt"), Name: new String('Bla'), Location: new String('Bla') }), signatureName = 'Signature', widget = doc.ref({ Type: 'Annot', Subtype: 'Widget', FT: 'Sig', Rect: [0, 0, 0, 0], V: signature, T: new String(signatureName + (fieldIds.length + 1)), F: 4, P: doc.page.dictionary }); doc.page.dictionary.data.Annots = [widget];

form = doc.ref({
    Type: 'AcroForm',
    SigFlags: 3,
    Fields: [...fieldIds, widget]
});
doc._root.data.AcroForm = form;
signature.end();
widget.end();
form.end();
doc.end();

const pdf = fs.readFileSync(doc);
const cert = fs.readFileSync("../../public/teste.p12");

const assinarPDF = new signpdf.SignPdf(
    pdf,
    cert, { passphrase: '123' }
);

Erro:

Cannot read property 'fonts' of undefined at PDFDocument.endAcroForm (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\pdfkit\js\pdfkit.js:4900:39) at PDFDocument.end (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\pdfkit\js\pdfkit.js:5506:10) at exports.sign_pdf (C:\Users\erick\Documents\Projetos\meu-ponto-server\routes\controllers\admin.js:712:9) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) at next (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\route.js:137:13) at isInternal (C:\Users\erick\Documents\Projetos\meu-ponto-server\helpers\auth.js:14:20) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) at next (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\route.js:137:13) at isAdmin (C:\Users\erick\Documents\Projetos\meu-ponto-server\helpers\auth.js:6:20) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) at next (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\route.js:137:13) at isLogged (C:\Users\erick\Documents\Projetos\meu-ponto-server\helpers\auth.js:43:20) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) at next (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\route.js:137:13) at Route.dispatch (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\route.js:112:3) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) at C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\index.js:281:22 at Function.process_params (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\index.js:335:12) at next (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\index.js:275:10) at Function.handle (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\index.js:174:3) at router (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\index.js:47:12) at Layer.handle [as handle_request] (C:\Users\erick\Documents\Projetos\meu-ponto-server\node_modules\express\lib\router\layer.js:95:5) (node:14696) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)

HELP

[vladh1]

@ZaunSupremoXV were you able to fix the issue? I have similar issue calling pdfkitAddPlaceholder helper using pdfKit version 0.11.0. Everything is working fine using the 0.10.0 version.

[erickximenes]

@ZaunSupremoXV você conseguiu corrigir o problema? Tenho um problema semelhante ao chamar o auxiliar pdfkitAddPlaceholder usando o pdfKit versão 0.11.0. Tudo está funcionando bem usando a versão 0.10.0.

Yes, can you share your code?

[vladh1]

Sure, very basic one:

const signer = require('node-signpdf').default; const pdfkitAddPlaceholder = require('node-signpdf/dist/helpers/pdfkitAddPlaceholder').default; const fs = require('fs'); const PDFDocument = require('pdfkit'); const pdf = new PDFDocument({ autoFirstPage: true, size: 'A4', layout: 'portrait', bufferPages: true, }); pdf.info.CreationDate = '';

// Add some content to the page pdf .fillColor('#333') .fontSize(25) .moveDown() .text('HELLO WORLD');

// Collect the ouput PDF // and, when done, resolve with it stored in a Buffer const pdfChunks = []; pdf.on('data', (data) => { pdfChunks.push(data); }); pdf.on('end', () => { console.log("pdfDoc.end"); let pdfBuffer = Buffer.concat(pdfChunks); let signedPDF = signer.sign(pdfBuffer, fs.readFileSync('pdf/cert/certificate.pfx')); fs.writeFileSync('pdf/document.pdf', signedPDF); });

// Externally (to PDFKit) add the signature placeholder. const refs = pdfkitAddPlaceholder({ pdf, pdfBuffer: Buffer.from([pdf]), reason: 'I am the author' }); // Externally end the streams of the created objects. // PDFKit doesn't know much about them, so it won't .end() them. Object.keys(refs).forEach(key => refs[key].end());

// Also end the PDFDocument stream. // See pdf.on('end'... on how it is then converted to Buffer. pdf.end();

[erickximenes]

@vladh1 right, i will send you my code. I'm using it in Express JS, it works in Adonis Js too.

[erickximenes]

The example is configured for Express

[erickximenes]

https://drive.google.com/file/d/11xNqDjwljluwS3_OXlGamHiOfizWJjAB/view?usp=sharing

[erickximenes]

In my example, the PDF is more complex, the fields are filled out using a form that the user fills out.

[erickximenes]

was it a help?

[vladh1]

Thanks. I used similar approach using plainAddPlaceholder instead of pdfkitAddPlaceholder, but the issue is with the vey big pdfs (~ 8MB) where plainAddPlaceholder takes 5 min to add the placeholder. So, in my case that is not an option.