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);}})}})}

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"); //一定要設置response的編碼為binary否則會下載下來的圖片打不開    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("保存失敗");        }        console.log("保存成功");      });    });    res.on("error", function (err) {      console.log("請求失敗");    });  });  req.on('error', function (err) {    console.log("請求失敗2" + err.message);  });  res.render('index', {title: '首頁2'});});module.exports = router;