通過管道流複製檔案

此程式使用可讀和可寫的流複製檔案，並使用 stream 類提供的 pipe() 函式

// 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
readable.pipe(writable);