login into yahoo and get cookies

login.js

var exec = require('child_process').exec;
var when = require('when');


function login(credentials) {
  var whenAuthenticated = when.defer();
  var user = credentials.user;
  var pass = credentials.pass;

  var res = {
    user: user,
    cookies: undefined
  };

  console.log('Logging into ' + user);

  var cmd = "./login.sh '"+user+"' '"+pass+"'";
  exec(cmd, function(error, stdout) {
    var cookies = stdout;

    if (!error && typeof cookies === 'string' && cookies.indexOf('B=') === 0 && cookies.length > 200) {
      cookies = cookies.substring(0, cookies.length - 1); // strip newline at end
      res.cookies = cookies;
      whenAuthenticated.resolve(res);
      return;
    }

    console.log('Failed to login into ' + user);
    console.log('error: ', error);
    console.log('output: ', stdout);
    success = false;
    whenAuthenticated.resolve(res);
  });

  return whenAuthenticated.promise;
}

login.sh

#!/bin/bash

user="${1}"
pass="${2}"

COOKIES_FILE=".cookies_${1}"
HIDDEN_FIELDS_FILE=".hiddens_${1}"
USER_AGENT='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36'

rm "${COOKIES_FILE}"
rm "${HIDDEN_FIELDS_FILE}"
curl -s -L -A "${USER_AGENT}" -c "${COOKIES_FILE}" -k 'https://login.yahoo.com/?.src=ym&.intl=us&.lang=en-US' | grep '<input name.\+hidden.\+value="[a-zA-Z0-9./-]\+"' | head -n 3 | tr -s ' ' | cut -d '"' -f 2,6 --output-delimiter '=' > "${HIDDEN_FIELDS_FILE}"


source "${HIDDEN_FIELDS_FILE}"

curl -s -L -b "${COOKIES_FILE}" -A "${USER_AGENT}"  -c "${COOKIES_FILE}" -k 'https://login.yahoo.com/?.src=ym&.intl=us&.lang=en-US' -d "username=${user}&passwd=${pass}&.persistent=y&_crumb=${_crumb}&_ts=${_ts}&_format&_uuid=${_uuid}&_seqid=2&otp_channel" > /dev/null
curl -s -L -b "${COOKIES_FILE}" -A "${USER_AGENT}"  -c "${COOKIES_FILE}" -k 'https://mail.yahoo.com/' > /dev/null
curl -s -L -b "${COOKIES_FILE}" -A "${USER_AGENT}"  -c "${COOKIES_FILE}" -k 'https://search.yahoo.com/' > /dev/null
curl -s -L -b "${COOKIES_FILE}" -A "${USER_AGENT}"  -c "${COOKIES_FILE}" -k 'https://index.search.yahoo.com/' > /dev/null

cat "${COOKIES_FILE}" | sed -e '1,4d' | cut -f6,7 --output-delimiter '=' | sed -e 's/$/;/' | xargs