Node.js Cloning a file using streams


Example

This program illustrates how one can copy a file using readable and writable streams using the createReadStream(), and createWriteStream() functions provided by the file system module.

//Require the file System module
var fs = require('fs');

/*
  Create readable stream to file in current directory (__dirname) named 'node.txt'
  Use utf8 encoding 
  Read the data in 16-kilobyte chunks
*/
var readable = fs.createReadStream(__dirname + '/node.txt', { encoding: 'utf8', highWaterMark: 16 * 1024 });

// create writable stream
var writable = fs.createWriteStream(__dirname + '/nodeCopy.txt');

// Write each chunk of data to the writable stream
readable.on('data', function(chunk) {
    writable.write(chunk);
});