Node.js 使用request模块下载文件的实例

npm install request

var request = require('request');
var fs = require('fs');

/*
* url 网络文件地址
* filename 文件名
* callback 回调函数
*/
function downloadFile(uri,filename,callback){
 var stream = fs.createWriteStream(filename);
 request(uri).pipe(stream).on('close', callback); 
}

var fileUrl = 'http://image.tianjimedia.com/uploadImages/2015/129/56/J63MI042Z4P8.jpg';
var filename = 'beauty.jpg';
downloadFile(fileUrl,filename,function(){
 console.log(filename+'下载完毕');
});