GET users/profile_image/:screen_name, Nodejs get latest user profile_image and avoid the 302 redirect with request.

server.js

/*
 * Access the profile image in various sizes for the user with the indicated screen_name.
 * Currently this resource does not return JSON (or XML), but instead returns a 302 redirect to the actual image resource.
 * Use requests request.head with option followRedirect set to false to get the image file name from the json in the header response.
 * example : http://127.0.0.1:4400/?screen_name=daithi44 
 */

var http = require('http')
, request = require('request')
, url = require('url');

http.createServer(function(req, res) {
  var twitterwho = url.parse(req.url, true).query;
  if (twitterwho.hasOwnProperty('screen_name')) {
    request.head({uri: 'http://api.twitter.com/1/users/profile_image?screen_name=' + twitterwho.screen_name + '&size=normal', followRedirect: false}, function(error, imageresponse) {
      if (!error && imageresponse.statusCode === 302) {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end(imageresponse.headers.location);
      } else {
        displayThis();
      }
    });
  } else {
    displayThis();
  }

  function displayThis() {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('something else');
  }
}).listen(4444);
console.log('Server running at http://127.0.0.1:4444/');