readline-cb

Node.js module for reading file line by line

Installation via npm

npm install readline-cb

Usage

var readline = require('readline-cb');

var filePath = 'path/to/file';
var i = 0;
readline.readLines(filePath, function (line, cb) {
  console.log(++i, line);
  cb();
}, function (err) {
  console.log('END');
});

Or more options

var readline = require('readline-cb');
var i = 0;
var options = {
  path     : 'path/to/file',
  EOL      : '\r\n', // Default is require('os').EOL
  encoding : 'ascii' // Default is 'utf8'
};

readline.readLines(options, function (line, cb) {
  console.log(++i, line);

  if (line === 'STOP') {
    // You can break readlines process by sending Error or not-null value to cb
    cb(true);
  } else {
    cb();
  }
}, function (err) {
  if (err) {
    console.error(err);
  }

  console.log('END');
});