How to download images in node.js

This article mainly introduces you to the two ways of downloading images in node.js and the implementation code for downloading remote images. It is very good and has reference value. Friends who need it can refer to it. I hope it can help everyone.

The specific code is as follows:

var request=require("request");
var fs=require("fs");
function download1(url,filename,fn){
request(url).pipe(fs.createWriteStream(filename).on("close",function(err,res){
if(err){
console.log(err);
}else{
fn&&fn();
}
}))
}
function download2(url,filename,fn){
request.get({uri:url, encoding:'binary'},function(err,res){
if(!err){
fs.writeFile(filename,res.body,"binary",function(err,res){
if(!err){
fn&&fn();
}else{
console.log(err);
}
})
}
})
}

ps: Let’s take a look at the implementation code of nodejs downloading remote images. The specific code is as follows:

var express = require('express');
var request = require('request');
var http = require('http');
var url = require('url');
var fs = require("fs");
var router = express.Router();
/* GET home page. */
router.get('/', function (req, res, next) {
  var url = "http://www.valu.cn/images/1.gif";
  //request('http://www.valu.cn/images/1.gif').pipe(fs.createWriteStream('./public/upload/downImg/logonew.png'));
  var req = http.get(url, function (res) {
    var imgData = "";
    res.setEncoding("binary"); //一定要设置response的编码为binary否则会下载下来的图片打不开
    res.on("data", function (chunk) {
      imgData += chunk;
    });
    res.on("end", function () {
      fs.writeFile("./public/upload/downImg/logonew.png", imgData, "binary", function (err) {
        if (err) {
          console.log("保存失败");
        }
        console.log("保存成功");
      });
    });
    res.on("error", function (err) {
      console.log("请求失败");
    });
  });
  req.on('error', function (err) {
    console.log("请求失败2" + err.message);
  });
  res.render('index', {title: '首页2'});
});
module.exports = router;

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