google_captcha.module in Google Captcha 7

Verifies if user is a human without necessity to solve a CAPTCHA.

File

google_captcha.module

<?php

/**
 * @file
 * Verifies if user is a human without necessity to solve a CAPTCHA.
 */

/**
 * Implements hook_menu().
 */
function google_captcha_menu() {
  $items = array();
  $items['admin/config/people/captcha/google_captcha'] = array(
    'title' => 'Google Captcha',
    'description' => 'Administer the Google No CAPTCHA reCAPTCHA web service.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array(
      'google_captcha_admin_settings',
    ),
    'access arguments' => array(
      'administer google_captcha',
    ),
    'type' => MENU_LOCAL_TASK,
    'file' => 'google_captcha.admin.inc',
  );
  return $items;
}

/**
 * Implements hook_permission().
 */
function google_captcha_permission() {
  return array(
    'administer google_captcha' => array(
      'title' => t('Administer Google Captcha'),
      'description' => t('Administer Google captcha settings'),
    ),
  );
}

/**
 * Implements hook_captcha().
 */
function google_captcha_captcha($op, $captcha_type = '') {
  switch ($op) {
    case 'list':
      return array(
        'Google Captcha',
      );
    case 'generate':
      $captcha = array();
      if ($captcha_type == 'Google Captcha') {
        $google_captcha_site_key = variable_get('google_captcha_site_key', FALSE);

        // Test if captcha can be used, falling back to Math if it is not
        // configured, the library won't load, or the server is down.
        if (!$google_captcha_site_key || !_google_captcha_load_library()) {
          $args = func_get_args();
          return captcha_captcha('generate', 'Math', $args);
        }

        // Create the form. Captcha requires TRUE to be returned in solution.
        $captcha['solution'] = TRUE;
        $captcha['captcha_validate'] = 'google_captcha_captcha_validation';
        $captcha['form']['captcha_response'] = array(
          '#type' => 'hidden',
          '#value' => 'Google no captcha',
        );
        $captcha['form']['google_capture'] = array(
          '#markup' => '<div class="g-recaptcha" data-sitekey="' . $google_captcha_site_key . '"></div>',
        );
        drupal_add_js('https://www.google.com/recaptcha/api.js', array(
          'defer' => TRUE,
          'async' => TRUE,
        ));
      }
      return $captcha;
  }
}

/**
 * CAPTCHA Callback; Validates the google captcha code.
 */
function google_captcha_captcha_validation($solution, $response, $element, $form_state) {
  $google_captcha_private_key = variable_get('google_captcha_private_key', FALSE);
  if (empty($_POST["g-recaptcha-response"]) || empty($google_captcha_private_key) || !_google_captcha_load_library()) {
    return FALSE;
  }
  $reCaptcha = new ReCaptcha($google_captcha_private_key);
  $resp = $reCaptcha
    ->verifyResponse($_SERVER["REMOTE_ADDR"], $_POST["g-recaptcha-response"]);
  return $resp != null && $resp->success;
}

/**
 * Load the recaptcha library.
 */
function _google_captcha_load_library() {
  return module_load_include('php', 'google_captcha', 'ReCAPTCHA/php/recaptchalib');
}

Functions

Name	Description
google_captcha_captcha	Implements hook_captcha().
google_captcha_captcha_validation	CAPTCHA Callback; Validates the google captcha code.
google_captcha_menu	Implements hook_menu().
google_captcha_permission	Implements hook_permission().
_google_captcha_load_library	Load the recaptcha library.