Adonis.js send pdf from buffer

send-pdf.ts

/*
    I did create a solution so you can generate a pdf, without saving the file, and send it as response.
    The problem was that adonis.js does not support pipe the pdf into response and send as an attachment.
*/

// you have to download the dependencies
import blobStream from 'blob-stream';
import PDFDocument from 'pdfkit';

// put it inside controller function
const return_pdf = new Promise((resolve) =>
{
    const doc = new PDFDocument();
    const buffers = [];
    doc.on('data', buffers.push.bind(buffers));
    const the_stream = doc.pipe(blobStream());
    // create elements
    doc.text('test');
    doc.end();
    the_stream.on('finish', () =>
    {
        let pdfData = Buffer.concat(buffers);
        response.header('Content-type', 'application/pdf');
        response.header('Content-Length', pdfData.length);
        response.header(
            'Content-disposition',
            'attachment; filename=test.pdf'
        );
        response.send(pdfData);
        resolve(true);
    });
});

await return_pdf;