Alec Gorge Alec Gorge - 2 months ago 23
Javascript Question

How to read binary files byte by byte in Node.js

What is the best way to read part of a binary file in Node.js?

I am looking to either access specific bytes in the "header" (less than the first 100 bytes) or read the file byte by byte.


Here is an example of the first 100 bytes from a file descriptor returned by

var fs = require('fs');'file.txt', 'r', function(status, fd) {
    if (status) {
    var buffer = new Buffer(100);, buffer, 0, 100, 0, function(err, num) {
        console.log(buffer.toString('utf8', 0, num));