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• Date Published: 05/01/2014
• Categories: Photography
• Client: DrupalEXP
• Skills: Web Design, Programming
• Website: http://demo.themesvision.com/

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About FM Gizmo

FM Gizmo is a one-stop field marketing solution.

FM Gizmo's customizability can help you fulfil all your field activity needs.

Order FM Gizmo now and Switch to working wisely.

Get In Touch

912, Opal Square, Wagle Estate, Thane(W) - 400604, Maharashtra

sales@fmgizmo.com

©2021 BizOneSoft Global Solutions Pvt. Ltd..

<?php

/**
 * @file
 * Contains code for sanitizing user input from the request.
 */

/**
 * Sanitizes user input from the request.
 */
class DrupalRequestSanitizer {

  /**
   * Tracks whether the request was already sanitized.
   */
  protected static $sanitized = FALSE;

  /**
   * Modifies the request to strip dangerous keys from user input.
   */
  public static function sanitize() {
    if (!self::$sanitized) {
      $whitelist = variable_get('sanitize_input_whitelist', array());
      $log_sanitized_keys = variable_get('sanitize_input_logging', FALSE);

      // Process query string parameters.
      $get_sanitized_keys = array();
      $_GET = self::stripDangerousValues($_GET, $whitelist, $get_sanitized_keys);
      if ($log_sanitized_keys && $get_sanitized_keys) {
        _drupal_trigger_error_with_delayed_logging(format_string('Potentially unsafe keys removed from query string parameters (GET): @keys', array('@keys' => implode(', ', $get_sanitized_keys))), E_USER_NOTICE);
      }

      // Process request body parameters.
      $post_sanitized_keys = array();
      $_POST = self::stripDangerousValues($_POST, $whitelist, $post_sanitized_keys);
      if ($log_sanitized_keys && $post_sanitized_keys) {
        _drupal_trigger_error_with_delayed_logging(format_string('Potentially unsafe keys removed from request body parameters (POST): @keys', array('@keys' => implode(', ', $post_sanitized_keys))), E_USER_NOTICE);
      }

      // Process cookie parameters.
      $cookie_sanitized_keys = array();
      $_COOKIE = self::stripDangerousValues($_COOKIE, $whitelist, $cookie_sanitized_keys);
      if ($log_sanitized_keys && $cookie_sanitized_keys) {
        _drupal_trigger_error_with_delayed_logging(format_string('Potentially unsafe keys removed from cookie parameters (COOKIE): @keys', array('@keys' => implode(', ', $cookie_sanitized_keys))), E_USER_NOTICE);
      }

      $request_sanitized_keys = array();
      $_REQUEST = self::stripDangerousValues($_REQUEST, $whitelist, $request_sanitized_keys);

      self::$sanitized = TRUE;
    }
  }

  /**
   * Removes the destination if it is dangerous.
   *
   * Note this can only be called after common.inc has been included.
   *
   * @return bool
   *   TRUE if the destination has been removed from $_GET, FALSE if not.
   */
  public static function cleanDestination() {
    $dangerous_keys = array();
    $log_sanitized_keys = variable_get('sanitize_input_logging', FALSE);

    $parts = drupal_parse_url($_GET['destination']);
    // If there is a query string, check its query parameters.
    if (!empty($parts['query'])) {
      $whitelist = variable_get('sanitize_input_whitelist', array());

      self::stripDangerousValues($parts['query'], $whitelist, $dangerous_keys);
      if (!empty($dangerous_keys)) {
        // The destination is removed rather than sanitized to mirror the
        // handling of external destinations.
        unset($_GET['destination']);
        unset($_REQUEST['destination']);
        if ($log_sanitized_keys) {
          trigger_error(format_string('Potentially unsafe destination removed from query string parameters (GET) because it contained the following keys: @keys', array('@keys' => implode(', ', $dangerous_keys))));
        }
        return TRUE;
      }
    }
    return FALSE;
  }

  /**
   * Strips dangerous keys from the provided input.
   *
   * @param mixed $input
   *   The input to sanitize.
   * @param string[] $whitelist
   *   An array of keys to whitelist as safe.
   * @param string[] $sanitized_keys
   *   An array of keys that have been removed.
   *
   * @return mixed
   *   The sanitized input.
   */
  protected static function stripDangerousValues($input, array $whitelist, array &$sanitized_keys) {
    if (is_array($input)) {
      foreach ($input as $key => $value) {
        if ($key !== '' && is_string($key) && $key[0] === '#' && !in_array($key, $whitelist, TRUE)) {
          unset($input[$key]);
          $sanitized_keys[] = $key;
        }
        else {
          $input[$key] = self::stripDangerousValues($input[$key], $whitelist, $sanitized_keys);
        }
      }
    }
    return $input;
  }

}