ngrid-electric-login/submitLogin.js

Login to the NGrid Electric website using curl

var should = require('should');
var querystring = require('querystring')
var spawn = require('child_process').spawn;
var rk = require('required-keys');
var fs = require('fs')
var path = require('path')
var temp = require('temp')
module.exports = function (data, cb) {
  var keys = ['currentLogin', 'viewState', 'eventValidation']
  var err = rk.truthySync(data, keys)
  if (err) {
    return cb({
      message: 'error submitting login for to get new cookie jar file, missing key in data',
      error: err,
      stack: new Error().stack
    })
  }
  var cookiePath = temp.path({suffix: '.txt'})
  var currentLogin = data.currentLogin
  var username = currentLogin.username
  var password = currentLogin.password
  var viewState = data.viewState
  var eventValidation = data.eventValidation

  // var eventValidation = '/wEWCQKTztSdAwLo8czFCAK5/tMUAvGqxSICpKzY0wYCzo6K/A0C1fmwzwkCqZTCxQUC/fGsuwnw9wXFH5nx6LJN5aKqqko2YF2f0w=='

  viewState = viewState.replace(/\n$/,'')
  var postData = {
    __VIEWSTATE: viewState,
    __EVENTVALIDATION: eventValidation,
    ctl00$MainContent$UCSignIn$txtSigninID: username,
    ctl00$MainContent$UCSignIn$txtPassword: password,
    ctl00$MainContent$UCSignIn$btnSignin: 'foo'
  }
 var postString = querystring.stringify(postData)+'\n'
  var args = [
    '--cookie-jar', cookiePath,
    '--insecure',
    '-X', 'POST', '--data', postString,
    '-H', 'User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31',
    '-H', 'Content-Type:application/x-www-form-urlencoded',
    '-H', 'Content-Length:' + postString.length,
    '-s',
    '-D',
    '-',
    'https://www1.nationalgridus.com/SignIn',
    '-o',
    '/dev/null'
  ]
  var cmd = 'curl'
  var curl = spawn(cmd, args)
  curl.stderr.setEncoding('utf8')
  curl.stdout.setEncoding('utf8')

  var stdOut = ''
  var stdErr = ''
  curl.stdout.on('data', function (data) {
    stdOut += data
  })
  curl.stderr.on('data', function (data) {
    stdErr += data
  })
  curl.on('exit', function(code) {
    if (code != 0) {
      return cb({
        message: 'login failed',
        error: 'bad return code from curl when posting login form',
        stack: new Error().stack,
        stdout: stdOut,
        stderr: stdErr,
        code: code
      })
    }
    cb(null, cookiePath)
  })
}