save_img.js

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

http.get('http://img31.mtime.cn/CMS/Gallery/2014/01/01/162652.23483887_160X160.jpg', function(res) {
    console.log("Got response: " + res.statusCode);
    var fw = fs.createWriteStream('./img2.jpg', {flags: 'w', encoding: 'binary', mode: '0666'});
    res.pipe(fw);
}).on('error', function(e) {
  console.log("Got error: " + e.message);
});