Howto append existing pdf to a generated?

fhrtms

Is it possible to append a uploaded external base64 pdf from POST data?

To include images is easy, but how can i append complete pdf files?
I can do it manually in the pdf utils configuration or in the afterRender function, but i have no idea how to append it automatically from the POST data.

https://playground.jsreport.net/w/fhrtms/9wsUQP9Y

fhrtms

I think I'm close...

async function afterRender(req, res) {
    let pdfBuffer = await downloadPDF('https://web.wpi.edu/Images/CMS/Provost/landscape.pdf')

    // THIS WORKS
    res.content = pdfBuffer

    // THIS RESULT IN: Error: EOL expected but not found
    //res.content = await jsreport.pdfUtils.append(res.content, pdfBuffer)
}

const axios = require('axios')

async function downloadPDF(pdfURL) {
    return axios.get(pdfURL, 
        {
            responseType: 'arraybuffer'
        }
    )
    .then(response => Buffer.from(response.data, 'binary'))
}

jan_blaha

Your code is good, but unfortunately, pdf-utils can't parse all pdf files in all various internal formats which is the case here.

We are constantly improving this, I have put to our backlog to check this particular pdf. We should get to it soon.
https://github.com/jsreport/jsreport/issues/1014

fhrtms

With npm i ghostscript-node i get a valid PDF.

const gs = require("ghostscript-node");

async function afterRender(req, res) {

    // load PDF as Buffer
    const pdf1 = await downloadPDF('https://www.aubrete.lt/wp-content/uploads/2019/06/1-COVERSTYLE-1.pdf')

    // get number of pages of pdf1
    const numPagesPDF1 = await gs.countPDFPages(pdf1);

    // get Buffer object with bytes of specified set of pages
    // page numbers begin with 1, last page is included
    const partOfPDF1 = await gs.extractPDFPages(pdf1, 1, numPagesPDF1);

    // checks if pdf1 is a valid PDF file
    const isPDF1Valid = await gs.isValidPDF(pdf1);
    
    if(isPDF1Valid) {
        res.content = await jsreport.pdfUtils.append(res.content, partOfPDF1)
    }
}