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How to Send AJAX request with CSRF token in CodeIgniter


How to Send AJAX request with CSRF token in CodeIgniter

In CodeIgniter, CSRF security isn't empowered as a matter of course. 

In the event that it is been empowered, at that point CodeIgniter creates a hash for every dynamic client and this is utilized to confirm the solicitation. 

Require to send the hash with the AJAX demand else, it gives mistake – "The activity you have mentioned isn't permitted.". 

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Right now, show how you can empower CSRF insurance and recover hash for next AJAX solicitation and pass hash in AJAX demand in the CodeIgniter venture. 

  • Table structure 

Right now, am utilizing clients table and included a few records – 

CREATE TABLE `users` (
  `name` varchar(80) NOT NULL,
  `username` varchar(80) NOT NULL,
  `gender` varchar(10) NOT NULL,
  `email` varchar(80) NOT NULL
  • Setup 

Empower CSRF assurance – 

Open application/config/config.php file and update the values of $config['csrf_protection'], $config['csrf_token_name'], and $config['csrf_regenerate'] like this –

$config['csrf_protection'] = TRUE;  // Enable CSRF
$config['csrf_token_name'] = 'csrf_hash_name'; // Token name (You can update it)
$config['csrf_regenerate'] = TRUE; // Set TRUE to regenerate Hash
  • Set TRUE the $config['csrf_protection'], this will empower CSRF. 
  • You can change the estimation of $config['csrf_token_name'] default it is set to 'csrf_test_name'. I transformed it to 'csrf_has_name'. This name is utilized in AJAX solicitation to pass the hash. 
  • Set TRUE the $config['csrf_regenerate'] in the event that you need to recover CSRF hash after every AJAX demand in any case set it FALSE. 
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Open application/config/database.php and characterize the Database association. 

$db['default'] = array(
 'dsn' => '',
 'hostname' => 'localhost',
 'username' => 'root', // Username
 'password' => '', // Password
 'database' => 'tutorial', // Database name
 'dbdriver' => 'mysqli',
 'dbprefix' => '',
 'pconnect' => FALSE,
 'db_debug' => (ENVIRONMENT !== 'production'),
 'cache_on' => FALSE,
 'cachedir' => '',
 'char_set' => 'utf8',
 'dbcollat' => 'utf8_general_ci',
 'swap_pre' => '',
 'encrypt' => FALSE,
 'compress' => FALSE,
 'stricton' => FALSE,
 'failover' => array(),
 'save_queries' => TRUE

Default controller 

Open application/config/routes.php and alter default_controller incentive to User. 

$route['default_controller'] = 'User';

Burden Database 

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To get to the MySQL database require stacking database library. 

Open application/config/autoload.php and include the database in libraries exhibit(). 

$autoload['libraries'] = array("database");
  • Model 

Make a Main_model.php record in the application/models/registry. 

Make getUserDetails() technique which takes a solitary parameter. 

Check if $postData['username'] is set or not. Whenever set at that point get a record from clients table where username=$postData['username']. 

Return the $response Array. 

Completed Code 

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Main_model extends CI_Model {
  function getUserDetails($postData){
    $response = array();
    if(isset($postData['username']) ){
      // Select record
      $this->db->where('username', $postData['username']);
      $q = $this->db->get('users');
      $response = $q->result_array();
    return $response;
  • Controller 

Make User.php document in application/controllers/registry. 

Make 2 strategies – 

  • index – Load url partner and user_view see. 
  • userDetails – This strategy is utilized to deal with the AJAX solicitation and return a reaction. 
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Peruse POST esteems and allot in $postData. Burden Main_model Model and call getUserDetails() technique where pass $postData. 

Dole out return an incentive in $data and read the new CSRF hash by calling $this->security->get_csrf_hash() for next AJAX ask for and appoint in $data['token']. 

Return $data Array in JSON position. 

Completed Code 

defined('BASEPATH') OR exit('No direct script access allowed');

class User extends CI_Controller {

   public function index(){

     // load base_url

     // load view

   public function userDetails(){

     // POST data
     $postData = $this->input->post();

     // load model

     // get data
     $data = $this->Main_model->getUserDetails($postData);

     // Read new token and assing in $data['token']
     $data['token'] = $this->security->get_csrf_hash();

     echo json_encode($data);

  • View 

Make user_view.php document in application/sees/catalog. 

Make a book component and store token name which is indicated in application/config.php record in name trait utilizing <?= $this->security->get_csrf_token_name(); ?>. Store CSRF hash in the component by calling <?= $this->security->get_csrf_hash(); ?>. 

Included some client names in the <select > <option>. Utilized username in the <option > esteem. 

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To show chosen client subtleties made <span > components. 

Script – 

Characterize change occasion on #sel_user selector. 

Peruse name quality of .txt_csrfname selector and relegate in csrfName variable. Dole out .txt_csrfname selector esteem in csrfHash variable. 

Dole out chosen alternative incentive in username variable. 

Send AJAX POST solicitation to '<?=base_url()?>index.php/User/userDetails' the place pass {username:username,[csrfName]:csrfHash } as information. 

Here, hash will pass like – [csrfName]: csrfHash. 

On effective callback read the token from reaction and update the .txt_csrfname selector esteem. 

Circle on the response[0] and update <span > components content. 

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Completed Code 

<!doctype html>
   <title>How to Send AJAX request with CSRF token in CodeIgniter</title>

    <!-- CSRF token (Here, name is 'csrf_hash_name' which is specified in $config['csrf_token_name'] in cofig.php file ) --> 
    <input type="text" class="txt_csrfname" name="<?= $this->security->get_csrf_token_name(); ?>" value="<?= $this->security->get_csrf_hash(); ?>"><br>   

    Select Username : <select id='sel_user'>
      <option value='yssyogesh'>yssyogesh</option>
      <option value='sonarika'>sonarika</option>
      <option value='vishal'>vishal</option>
      <option value='sunil'>sunil</option>

    <!-- User details -->
    <div >
       Username : <span id='suname'></span><br/>
       Name : <span id='sname'></span><br/>
       Email : <span id='semail'></span><br/>

    <!-- Script -->
    <script src=""></script>
    <script type='text/javascript'>
    // baseURL variable
    var baseURL= "<?= base_url();?>";


          // CSRF Hash
          var csrfName = $('.txt_csrfname').attr('name'); // Value specified in $config['csrf_token_name']
          var csrfHash = $('.txt_csrfname').val(); // CSRF hash
          // Username
          var username = $(this).val();

          // AJAX request
            method: 'post',
            data: {username: username,[csrfName]: csrfHash },
            dataType: 'json',
            success: function(response){

              // Update CSRF hash

              // Empty the elements
              // Loop on response

                 var uname = value.username;
                 var name =;
                 var email =;



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  • Conclusion

On the off chance that you would prefer not to recover hash for each AJAX, at that point set FALSE to $config['csrf_regenerate'] in config.php document. Right now, new hash will be created by the CSRF expiry time set.