Node.js如何实现针对长尾关键词的图片批量下载操作？

本文共计626个文字，预计阅读时间需要3分钟。

Node.js 批量下载图片示例操作：

使用 Node.js 批量下载图片，首先需要获取图片链接。以下是一个简单的操作步骤：

1. 获取图片链接：javascriptconst img=[http://img.558idc.com/uploadfile/allimg/js/];

2. 使用 `https` 模块下载图片：javascriptconst https=require('https');const fs=require('fs');

img.forEach((url)=> { const fileName=url.split('/').pop(); https.get(url, (res)=> { res.pipe(fs.createWriteStream(fileName)); });});

以上代码将下载列表中的每张图片，并保存为与链接中文件名相同的文件。

本文实例讲述了Node.js实现批量下载图片简单操作。分享给大家供大家参考，具体如下：

使用Node.js批量下载图片

首先要获取到图片链接：

const img = [ "img.558idc.com/uploadfile/allimg/js/52218400506629423.jpg", "img.558idc.com/uploadfile/allimg/js/52218400540139692.jpg", "img.558idc.com/uploadfile/allimg/js/52218400540118251.jpg", "img.558idc.com/uploadfile/allimg/js/52218400540069242.jpg", "img.558idc.com/uploadfile/allimg/js/52218400681111127.jpg", "img.558idc.com/uploadfile/allimg/js/52218400703641344.jpg", "img.558idc.com/uploadfile/allimg/js/52218400854321042.jpg", "img.558idc.com/uploadfile/allimg/js/52218400847773096.jpg", "img.558idc.com/uploadfile/allimg/js/52218400859178000.jpg", "img.558idc.com/uploadfile/allimg/js/52218400865596453.jpg", "img.558idc.com/uploadfile/allimg/js/52218400902911909.jpg", "img.558idc.com/uploadfile/allimg/js/52218400953029599.jpg", "img.558idc.com/uploadfile/allimg/js/52218400989455804.jpg", "img.558idc.com/uploadfile/allimg/js/52218401005976517.jpg", "img.558idc.com/uploadfile/allimg/js/52218400968714979.jpg", "img.558idc.com/uploadfile/allimg/js/52218401035049758.jpg", "img.558idc.com/uploadfile/allimg/js/52218401049432628.jpg", "img.558idc.com/uploadfile/allimg/js/52218401077574176.jpg", "img.558idc.com/uploadfile/allimg/js/52218401130741871.jpg", "img.558idc.com/uploadfile/allimg/js/52218401189588504.jpg", "img.558idc.com/uploadfile/allimg/js/52218401178924270.jpg", "img.558idc.com/uploadfile/allimg/js/52218401236159469.jpg", "img.558idc.com/uploadfile/allimg/js/52218401233410806.jpg", "img.558idc.com/uploadfile/allimg/js/52218401271226281.jpg", "img.558idc.com/uploadfile/allimg/js/52218401296600908.jpg", "img.558idc.com/uploadfile/allimg/js/52218401331496769.jpg", "img.558idc.com/uploadfile/allimg/js/52218401294723014.jpg", "img.558idc.com/uploadfile/allimg/js/52218401355737956.jpg", "img.558idc.com/uploadfile/allimg/js/52218401375565373.jpg", "img.558idc.com/uploadfile/allimg/js/52218401430489282.jpg", "img.558idc.com/uploadfile/allimg/js/52218401429130694.jpg", "img.558idc.com/uploadfile/allimg/js/52218401443905011.jpg", "img.558idc.com/uploadfile/allimg/js/52218401494231215.jpg", "img.558idc.com/uploadfile/allimg/js/52218401470554382.jpg", "img.558idc.com/uploadfile/allimg/js/52218401544523253.jpg", "img.558idc.com/uploadfile/allimg/js/52218401585803008.jpg", "img.558idc.com/uploadfile/allimg/js/52218401632787055.jpg", "img.558idc.com/uploadfile/allimg/js/52218401681076773.jpg", "img.558idc.com/uploadfile/allimg/js/52218401666198563.jpg", "img.558idc.com/uploadfile/allimg/js/52218401687089797.jpg", "img.558idc.com/uploadfile/allimg/js/52218401796465344.jpg", "img.558idc.com/uploadfile/allimg/js/52218401847533545.jpg" ];

批量下载图片：

var fs = require('fs'); var request = require("request"); img.forEach(src => { var writeStream = fs.createWriteStream(src.split('/2019/08/')[1]); var readStream = request(src) readStream.pipe(writeStream); readStream.on('end', function() { console.log('文件下载成功'); }); readStream.on('error', function() { console.log(1); // console.log("错误信息:" + err) }) writeStream.on("finish", function() { console.log("文件写入成功"); writeStream.end(); }); });

希望本文所述对大家node.js程序设计有所帮助。