Node.js Filesystem I/O Copying files by piping streams


This program copies a file using readable and a writable stream with the pipe() function provided by the stream class

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

    Create readable stream to file in current directory 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 + '/nodePipe.txt');

// use pipe to copy readable to writable