node.js抓取网上图片保存到本地

用到两个模块，http和fs

var http = require("http");
var fs = require("fs");

var server = http.createServer(function(req, res){}).listen(50082);
console.log("http start");

var url = "http://s0.hao123img.com/res/img/logo/logonew.png";
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("down fail");
            }
            console.log("down success");
        });
    });
});