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

I'll try to be precise here. I will not be covering usage of pdfKit's nodejs sdk in much detail.

IF you want your generated pdf as a file.

var PDFDocument = require('pdfkit');

// Create a document
doc = new PDFDocument();

// Pipe it's output somewhere, like to a file or HTTP response
doc.pipe(fs.createWriteStream('output.pdf'));
doc.text('Whatever content goes here');
doc.end();
var params = {
  key : fileName,
  body : './output.pdf',
  bucket : 'bucketName',
  contentType : 'application/pdf'
}

s3.putObject(params, function(err, response) {

});

However if you want to stream it ( to say S3 bucket in the context of question), then it is worth remembering that every pdfkit instance is a readable stream.

And S3 expects a file, a buffer or a readable stream. So,

var doc = new PDFDocument();

// Pipe it's output somewhere, like to a file or HTTP response
doc.text("Text for your PDF");
doc.end();

var params = {
  key : fileName,
  body : doc,
  bucket : 'bucketName',
  contentType : 'application/pdf'
}

//notice use of the upload function, not the putObject function
s3.upload(params, function(err, response) {

});