Convert Blob data to Raw buffer in javascript or node

Question

I am using a plugin jsPDF which generates PDF and saves it to local file system. Now in jsPDF.js, there is some piece of code which generates pdf data in blob format as:-

<

Answer 1

           var blob = new Blob([array], {type: "application/pdf"});

            var arrayBuffer, uint8Array;
            var fileReader = new FileReader();
            fileReader.onload = function() {
                arrayBuffer = this.result;
                uint8Array  = new Uint8Array(arrayBuffer);

                var printer = require("./js/controller/lib");
                printer.printDirect({
                    data: uint8Array,
                    printer:'Deskjet_3540',
                    type: 'PDF',
                    success: function(id) {
                        console.log('printed with id ' + id);
                    },
                    error: function(err) {
                        console.error('error on printing: ' + err);
                    }
                })
            };
            fileReader.readAsArrayBuffer(blob);

This is the final code which worked for me. The printer accepts uint8Array encoding format.

Answer 2

Try:

var blob = new Blob([array], {type: "application/pdf"});
var buffer = new Buffer(blob, "binary");

Answer 3

For me, it worked with the following:

const buffer=Buffer.from(blob,'binary');

So, this buffer can be stored in Google Cloud Storage and local disk with fs node package.

I used blob file, to send data from client to server through ddp protocol (Meteor), so, when this file arrives to server I convert it to buffer in order to store it.