Page scraping with login

gistfile1.js

var request = require('request').defaults({ jar: true });
var config = require('./config.json');

var log = console.log.bind(console);

function wrapcb(orig_url, cb) {
  return function(err, res, body) {
    if (res && res.statusCode === 302) {
      var url = require('url').resolve(orig_url, res.headers.location);
      log('Redirect from ' + orig_url + ' to ' + url);
      if (orig_url.indexOf('login') !== -1 && url.indexOf('login') !== -1) {
        log('Redirect from login back to login, probably invalid password, check config.json');
        log('You may have made too many login attempts and will have to wait a\nwhile before trying again.')
        process.exit(-1);
      }
      return request.get(url, cb);
    }
    if (err) {
      console.warn('Error getting ' + orig_url + ': ' + err);
    } else if (res.statusCode !== 200) {
      console.warn('Status code ' + res.statusCode);
      log(res.headers);
    } else {
      cb(res, body);
    }
  };
}

function login(next) {
  log('Logging in...');
  request.get('https://mwomercs.com/login', function(err, res, body) {
    request.post('https://mwomercs.com/do/login',
      {form: {email: config.email, password: config.password}},
      wrapcb('https://mwomercs.com/do/login', function(res, body) {
        is_logged_in = true;
        next();
      })
    );
  });
}

function getPage(url, output, next) {
  request.get(url,
    wrapcb(url, function(res, body) {
      if (body.indexOf('<title>MWO: Login</title>') !== -1) {
        log('No longer logged in, trying again!');
        login(getPage.bind(undefined, url, output, next));
        return;
      }
      var file_name = file_dir + '/' + output + '.html';
      status('Saved ' + url + ' to ' + file_name);
      fs.writeFile(userdata + file_name, body, next);
    })
  );
}

login(function () {
  getPage('https://mwomercs.com/profile/stats', 'stats.txt', function () {
    log('done!');
  });
});