Feeding Pdfkit generated file to pdf-lib.

I am trying to send a pdfkit generated pdf file as input to pdflib for merging. I am using async function. My project is being developed using sails Js version:“^1.2.3”, “node”: “^12.16”, my pdf-kit version is: “^0.11.0”, “pdf-lib”: “^1.9.0”, This is the code:

const  textbytes=fs.readFileSync(textfile);
var bytes1 = new Uint8Array(textbytes);
 const textdoc = await PDFDocument.load(bytes1)

The error i am getting is:

UnhandledPromiseRejectionWarning: Error: Failed to parse PDF document (line:0 col:0 offset=0): No PDF header found

Please help me with this issue.

[Hopding]

@Patcher56 Looks like a very interesting project! I suspect that in many places the protected access modifier could be used instead of the private one. I don’t want to replace all usages of private, and relatively few instances should be changed to public. If something is marked as private then it is not meant to be public interfaces and is subject to breaking changes. If you’d like to open a PR changing the things you need to protected, I’d be happy to take a look.

[hdwong]

I also use pdfkit and pdf-lib at the same time, but I can embed the pdf files generated by pdfkit. I use embedPdf instead of PDFDocument.load.

const PDFDocument = require('pdf-lib');
const pdfDoc = await PDFDocument.create();
const [ sourcePage ] = await pdfDoc.embedPdf(fs.readFileSync(textfile));

I think the problem may be that the pdf generated by pdfkit is not saved completely, you can try to ensure that the pdf file has been written before load by pdf-lib.

const PDFDocument = require('pdfkit');
const doc = new PDFDocument;
doc.pipe(fs.createWriteStream('/path/to/file.pdf'));

// draw something...

(async () => {
  await new Promise(resolve => {
    // resolve after WriteStream is finished, 
    doc.stream.on('finish', resolve);
    // finalize the PDF and end the stream
    doc.end();
  });

  // open the file after here
})();