主要使用fs模块的pipe方法，简单粗暴：
import fs from "fs"; import path from ‘path‘; import request from ‘request‘; const movieDir = "./"; const movieName = "download_movie"; const url = "http://img4.imgtn.bdimg.com/it/u=2389140428,1315216178&fm=23&gp=0.jpg"; request.get(url).pipe(fs.createWriteStream(path.join(movieDir, movieName + ‘.jpg‘)));
原文：http://www.cnblogs.com/vipzhou/p/6500872.html