nodejs download img

get_img.js

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

http.get('http://25.media.tumblr.com/tumblr_m98u7dXTPQ1qz7hmlo1_500.jpg',function (res) {
        console.log(res.statusCode);
        console.log(JSON.stringify(res.headers));

        var imgdata = "";
        res.setEncoding('binary');
        res.on('data',function (chunk) {
            imgdata += chunk;
        });
        res.on('end',function () {
            fs.writeFile('a.jpg',imgdata,'binary',function (err) {
                if(err) throw err;
                console.log('saved');
            });
        });
    }).on('error',function (e) {
        console.log('Error: ' + e.message);
    });