Upload pdf generated to AWS S3 using nodejs aws sdk

Question

I am using pdfkit to generate a pdf with some custom content and then sending it to an AWS S3 bucket.

While if I generate the file as a whole and upload it works perfectly, however, if I want to stream the generated file probably as an octet stream I am not able to find any relevant pointers.

I am looking for a nodejs solution (or suggestion).

Answer 1

Tried this and worked. I created a readFileSync and then uploaded that to S3. I also used a "writeStream.on('finish' " so that pdf file is completely created before it is uploaded, otherwise it uploads partial file.

const PDFDocument = require('pdfkit');
const fs = require('fs');
const AWS = require('aws-sdk');
const path = require('path')

async function createPDF() {


const doc = new PDFDocument({size: 'A4'});
let writeStream = fs.createWriteStream('./output.pdf')
doc.pipe(writeStream);


// Finalize PDF file
doc.end();

writeStream.on('finish', function () {
    var appDir = path.dirname(require.main.filename);
    const fileContent = fs.readFileSync(appDir + '/output.pdf');
    var params = {
        Key : 'filName',
        Body : fileContent,
        Bucket : process.env.AWS_BUCKET,
        ContentType : 'application/pdf',
        ACL: "public-read"
      }
      
    const s3 = new AWS.S3({
        accessKeyId: process.env.AWS_ACCESS_KEY,
        secretAccessKey: process.env.AWS_SECRET_KEY
    });
      //notice use of the upload function, not the putObject function
    s3.upload(params, function(err, response) {
        
    });
});

}