How to read binary file byte by byte using javascript?

javascript, node.js

Solution

You can read the file synchronously, byte by byte:

fs.open('file.txt', 'r', function(err, fd) {
  if (err)
    throw err;
  var buffer = Buffer.alloc(1);
  while (true)
  {   
    var num = fs.readSync(fd, buffer, 0, 1, null);
    if (num === 0)
      break;
    console.log('byte read', buffer[0]);
  }
});

Problem

I need to read the binary file byte by byte using javascript.I had got below code in this site,but its not working.I think i have to add some extra src file as a reference to it.Please help me to do it.here the code... ``` var fs = require('fs'); var Buffer = require('buffer').Buffer; var constants = require('constants'); fs.open("file.txt", 'r', function(status, fd) { if (status) { console.log(status.message); return; } var buffer = new Buffer(100); fs.read(fd, buffer, 0, 100, 0, function(err, num) { console.log(buffer.toString('utf-8', 0, num)); }); }); ```

Original source