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<?php class WPCF7_RECAPTCHA extends WPCF7_Service { const VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify'; private static $instance; private $sitekeys; public static function get_instance() { if ( empty( self::$instance ) ) { self::$instance = new self; } return self::$instance; } private function __construct() { $this->sitekeys = WPCF7::get_option( 'recaptcha' ); } public function get_title() { return __( 'reCAPTCHA', 'contact-form-7' ); } public function is_active() { $sitekey = $this->get_sitekey(); $secret = $this->get_secret( $sitekey ); return $sitekey && $secret; } public function get_categories() { return array( 'captcha' ); } public function icon() { } public function link() { echo sprintf( '<a href="%1$s">%2$s</a>', 'https://www.google.com/recaptcha/intro/index.html', 'google.com/recaptcha' ); } public function get_sitekey() { if ( empty( $this->sitekeys ) || ! is_array( $this->sitekeys ) ) { return false; } $sitekeys = array_keys( $this->sitekeys ); return $sitekeys[0]; } public function get_secret( $sitekey ) { $sitekeys = (array) $this->sitekeys; if ( isset( $sitekeys[$sitekey] ) ) { return $sitekeys[$sitekey]; } else { return false; } } public function verify( $response_token ) { $is_human = false; if ( empty( $response_token ) ) { return $is_human; } $url = self::VERIFY_URL; $sitekey = $this->get_sitekey(); $secret = $this->get_secret( $sitekey ); $response = wp_safe_remote_post( $url, array( 'body' => array( 'secret' => $secret, 'response' => $response_token, 'remoteip' => $_SERVER['REMOTE_ADDR'] ) ) ); if ( 200 != wp_remote_retrieve_response_code( $response ) ) { return $is_human; } $response = wp_remote_retrieve_body( $response ); $response = json_decode( $response, true ); $is_human = isset( $response['success'] ) && true == $response['success']; return $is_human; } private function menu_page_url( $args = '' ) { $args = wp_parse_args( $args, array() ); $url = menu_page_url( 'wpcf7-integration', false ); $url = add_query_arg( array( 'service' => 'recaptcha' ), $url ); if ( ! empty( $args) ) { $url = add_query_arg( $args, $url ); } return $url; } public function load( $action = '' ) { if ( 'setup' == $action ) { if ( 'POST' == $_SERVER['REQUEST_METHOD'] ) { check_admin_referer( 'wpcf7-recaptcha-setup' ); $sitekey = isset( $_POST['sitekey'] ) ? trim( $_POST['sitekey'] ) : ''; $secret = isset( $_POST['secret'] ) ? trim( $_POST['secret'] ) : ''; if ( $sitekey && $secret ) { WPCF7::update_option( 'recaptcha', array( $sitekey => $secret ) ); $redirect_to = $this->menu_page_url( array( 'message' => 'success' ) ); } elseif ( '' === $sitekey && '' === $secret ) { WPCF7::update_option( 'recaptcha', null ); $redirect_to = $this->menu_page_url( array( 'message' => 'success' ) ); } else { $redirect_to = $this->menu_page_url( array( 'action' => 'setup', 'message' => 'invalid' ) ); } wp_safe_redirect( $redirect_to ); exit(); } } } public function admin_notice( $message = '' ) { if ( 'invalid' == $message ) { echo sprintf( '<div class="error notice notice-error is-dismissible"><p><strong>%1$s</strong>: %2$s</p></div>', esc_html( __( "ERROR", 'contact-form-7' ) ), esc_html( __( "Invalid key values.", 'contact-form-7' ) ) ); } if ( 'success' == $message ) { echo sprintf( '<div class="updated notice notice-success is-dismissible"><p>%s</p></div>', esc_html( __( 'Settings saved.', 'contact-form-7' ) ) ); } } public function display( $action = '' ) { ?> <p><?php echo esc_html( __( "reCAPTCHA is a free service to protect your website from spam and abuse.", 'contact-form-7' ) ); ?></p> <?php if ( 'setup' == $action ) { $this->display_setup(); return; } if ( $this->is_active() ) { $sitekey = $this->get_sitekey(); $secret = $this->get_secret( $sitekey ); ?> <table class="form-table"> <tbody> <tr> <th scope="row"><?php echo esc_html( __( 'Site Key', 'contact-form-7' ) ); ?></th> <td class="code"><?php echo esc_html( $sitekey ); ?></td> </tr> <tr> <th scope="row"><?php echo esc_html( __( 'Secret Key', 'contact-form-7' ) ); ?></th> <td class="code"><?php echo esc_html( wpcf7_mask_password( $secret ) ); ?></td> </tr> </tbody> </table> <p><a href="<?php echo esc_url( $this->menu_page_url( 'action=setup' ) ); ?>" class="button"><?php echo esc_html( __( "Reset Keys", 'contact-form-7' ) ); ?></a></p> <?php } else { ?> <p><?php echo esc_html( __( "To use reCAPTCHA, you need to install an API key pair.", 'contact-form-7' ) ); ?></p> <p><a href="<?php echo esc_url( $this->menu_page_url( 'action=setup' ) ); ?>" class="button"><?php echo esc_html( __( "Configure Keys", 'contact-form-7' ) ); ?></a></p> <p><?php echo sprintf( esc_html( __( "For more details, see %s.", 'contact-form-7' ) ), wpcf7_link( __( 'http://contactform7.com/recaptcha/', 'contact-form-7' ), __( 'reCAPTCHA', 'contact-form-7' ) ) ); ?></p> <?php } } public function display_setup() { ?> <form method="post" action="<?php echo esc_url( $this->menu_page_url( 'action=setup' ) ); ?>"> <?php wp_nonce_field( 'wpcf7-recaptcha-setup' ); ?> <table class="form-table"> <tbody> <tr> <th scope="row"><label for="sitekey"><?php echo esc_html( __( 'Site Key', 'contact-form-7' ) ); ?></label></th> <td><input type="text" aria-required="true" value="" id="sitekey" name="sitekey" class="regular-text code" /></td> </tr> <tr> <th scope="row"><label for="secret"><?php echo esc_html( __( 'Secret Key', 'contact-form-7' ) ); ?></label></th> <td><input type="text" aria-required="true" value="" id="secret" name="secret" class="regular-text code" /></td> </tr> </tbody> </table> <p class="submit"><input type="submit" class="button button-primary" value="<?php echo esc_attr( __( 'Save', 'contact-form-7' ) ); ?>" name="submit" /></p> </form> <?php } } add_action( 'wpcf7_init', 'wpcf7_recaptcha_register_service' ); function wpcf7_recaptcha_register_service() { $integration = WPCF7_Integration::get_instance(); $categories = array( 'captcha' => __( 'CAPTCHA', 'contact-form-7' ) ); foreach ( $categories as $name => $category ) { $integration->add_category( $name, $category ); } $services = array( 'recaptcha' => WPCF7_RECAPTCHA::get_instance() ); foreach ( $services as $name => $service ) { $integration->add_service( $name, $service ); } } add_action( 'wpcf7_enqueue_scripts', 'wpcf7_recaptcha_enqueue_scripts' ); function wpcf7_recaptcha_enqueue_scripts() { $url = 'https://www.google.com/recaptcha/api.js'; $url = add_query_arg( array( 'onload' => 'recaptchaCallback', 'render' => 'explicit' ), $url ); wp_register_script( 'google-recaptcha', $url, array(), '2.0', true ); } add_action( 'wp_footer', 'wpcf7_recaptcha_callback_script' ); function wpcf7_recaptcha_callback_script() { if ( ! wp_script_is( 'google-recaptcha', 'enqueued' ) ) { return; } ?> <script type="text/javascript"> var recaptchaWidgets = []; var recaptchaCallback = function() { var forms = document.getElementsByTagName('form'); var pattern = /(^|\s)g-recaptcha(\s|$)/; for (var i = 0; i < forms.length; i++) { var divs = forms[i].getElementsByTagName('div'); for (var j = 0; j < divs.length; j++) { var sitekey = divs[j].getAttribute('data-sitekey'); if (divs[j].className && divs[j].className.match(pattern) && sitekey) { var params = { 'sitekey': sitekey, 'theme': divs[j].getAttribute('data-theme'), 'type': divs[j].getAttribute('data-type'), 'size': divs[j].getAttribute('data-size'), 'tabindex': divs[j].getAttribute('data-tabindex') }; var callback = divs[j].getAttribute('data-callback'); if (callback && 'function' == typeof window[callback]) { params['callback'] = window[callback]; } var expired_callback = divs[j].getAttribute('data-expired-callback'); if (expired_callback && 'function' == typeof window[expired_callback]) { params['expired-callback'] = window[expired_callback]; } var widget_id = grecaptcha.render(divs[j], params); recaptchaWidgets.push(widget_id); break; } } } } </script> <?php } add_action( 'wpcf7_init', 'wpcf7_recaptcha_add_form_tag_recaptcha' ); function wpcf7_recaptcha_add_form_tag_recaptcha() { $recaptcha = WPCF7_RECAPTCHA::get_instance(); if ( $recaptcha->is_active() ) { wpcf7_add_form_tag( 'recaptcha', 'wpcf7_recaptcha_form_tag_handler' ); } } function wpcf7_recaptcha_form_tag_handler( $tag ) { wp_enqueue_script( 'google-recaptcha' ); $tag = new WPCF7_FormTag( $tag ); $atts = array(); $recaptcha = WPCF7_RECAPTCHA::get_instance(); $atts['data-sitekey'] = $recaptcha->get_sitekey(); $atts['data-theme'] = $tag->get_option( 'theme', '(dark|light)', true ); $atts['data-type'] = $tag->get_option( 'type', '(audio|image)', true ); $atts['data-size'] = $tag->get_option( 'size', '(compact|normal)', true ); $atts['data-tabindex'] = $tag->get_option( 'tabindex', 'int', true ); $atts['data-callback'] = $tag->get_option( 'callback', '', true ); $atts['data-expired-callback'] = $tag->get_option( 'expired_callback', '', true ); $atts['class'] = $tag->get_class_option( wpcf7_form_controls_class( $tag->type, 'g-recaptcha' ) ); $atts['id'] = $tag->get_id_option(); $html = sprintf( '<div %1$s></div>', wpcf7_format_atts( $atts ) ); $html .= wpcf7_recaptcha_noscript( array( 'sitekey' => $atts['data-sitekey'] ) ); $html = sprintf( '<div class="wpcf7-form-control-wrap">%s</div>', $html ); return $html; } function wpcf7_recaptcha_noscript( $args = '' ) { $args = wp_parse_args( $args, array( 'sitekey' => '' ) ); if ( empty( $args['sitekey'] ) ) { return; } $url = add_query_arg( 'k', $args['sitekey'], 'https://www.google.com/recaptcha/api/fallback' ); ob_start(); ?> <noscript> <div style="width: 302px; height: 422px;"> <div style="width: 302px; height: 422px; position: relative;"> <div style="width: 302px; height: 422px; position: absolute;"> <iframe src="<?php echo esc_url( $url ); ?>" frameborder="0" scrolling="no" style="width: 302px; height:422px; border-style: none;"> </iframe> </div> <div style="width: 300px; height: 60px; border-style: none; bottom: 12px; left: 25px; margin: 0px; padding: 0px; right: 25px; background: #f9f9f9; border: 1px solid #c1c1c1; border-radius: 3px;"> <textarea id="g-recaptcha-response" name="g-recaptcha-response" class="g-recaptcha-response" style="width: 250px; height: 40px; border: 1px solid #c1c1c1; margin: 10px 25px; padding: 0px; resize: none;"> </textarea> </div> </div> </div> </noscript> <?php return ob_get_clean(); } add_filter( 'wpcf7_spam', 'wpcf7_recaptcha_check_with_google', 9 ); function wpcf7_recaptcha_check_with_google( $spam ) { if ( $spam ) { return $spam; } $contact_form = wpcf7_get_current_contact_form(); if ( ! $contact_form ) { return $spam; } $tags = $contact_form->scan_form_tags( array( 'type' => 'recaptcha' ) ); if ( empty( $tags ) ) { return $spam; } $recaptcha = WPCF7_RECAPTCHA::get_instance(); if ( ! $recaptcha->is_active() ) { return $spam; } $response_token = wpcf7_recaptcha_response(); $spam = ! $recaptcha->verify( $response_token ); return $spam; } add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_recaptcha', 45 ); function wpcf7_add_tag_generator_recaptcha() { $tag_generator = WPCF7_TagGenerator::get_instance(); $tag_generator->add( 'recaptcha', __( 'reCAPTCHA', 'contact-form-7' ), 'wpcf7_tag_generator_recaptcha', array( 'nameless' => 1 ) ); } function wpcf7_tag_generator_recaptcha( $contact_form, $args = '' ) { $args = wp_parse_args( $args, array() ); $recaptcha = WPCF7_RECAPTCHA::get_instance(); if ( ! $recaptcha->is_active() ) { ?> <div class="control-box"> <fieldset> <legend><?php echo sprintf( esc_html( __( "To use reCAPTCHA, first you need to install an API key pair. For more details, see %s.", 'contact-form-7' ) ), wpcf7_link( __( 'http://contactform7.com/recaptcha/', 'contact-form-7' ), __( 'reCAPTCHA', 'contact-form-7' ) ) ); ?></legend> </fieldset> </div> <?php return; } $description = __( "Generate a form-tag for a reCAPTCHA widget. For more details, see %s.", 'contact-form-7' ); $desc_link = wpcf7_link( __( 'http://contactform7.com/recaptcha/', 'contact-form-7' ), __( 'reCAPTCHA', 'contact-form-7' ) ); ?> <div class="control-box"> <fieldset> <legend><?php echo sprintf( esc_html( $description ), $desc_link ); ?></legend> <table class="form-table"> <tbody> <tr> <th scope="row"><?php echo esc_html( __( 'Theme', 'contact-form-7' ) ); ?></th> <td> <fieldset> <legend class="screen-reader-text"><?php echo esc_html( __( 'Theme', 'contact-form-7' ) ); ?></legend> <label for="<?php echo esc_attr( $args['content'] . '-theme-light' ); ?>"><input type="radio" name="theme" class="option default" id="<?php echo esc_attr( $args['content'] . '-theme-light' ); ?>" value="light" checked="checked" /> <?php echo esc_html( __( 'Light', 'contact-form-7' ) ); ?></label> <br /> <label for="<?php echo esc_attr( $args['content'] . '-theme-dark' ); ?>"><input type="radio" name="theme" class="option" id="<?php echo esc_attr( $args['content'] . '-theme-dark' ); ?>" value="dark" /> <?php echo esc_html( __( 'Dark', 'contact-form-7' ) ); ?></label> </fieldset> </td> </tr> <tr> <th scope="row"><?php echo esc_html( __( 'Size', 'contact-form-7' ) ); ?></th> <td> <fieldset> <legend class="screen-reader-text"><?php echo esc_html( __( 'Size', 'contact-form-7' ) ); ?></legend> <label for="<?php echo esc_attr( $args['content'] . '-size-normal' ); ?>"><input type="radio" name="size" class="option default" id="<?php echo esc_attr( $args['content'] . '-size-normal' ); ?>" value="normal" checked="checked" /> <?php echo esc_html( __( 'Normal', 'contact-form-7' ) ); ?></label> <br /> <label for="<?php echo esc_attr( $args['content'] . '-size-compact' ); ?>"><input type="radio" name="size" class="option" id="<?php echo esc_attr( $args['content'] . '-size-compact' ); ?>" value="compact" /> <?php echo esc_html( __( 'Compact', 'contact-form-7' ) ); ?></label> </fieldset> </td> </tr> <tr> <th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th> <td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-id' ); ?>" /></td> </tr> <tr> <th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th> <td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-class' ); ?>" /></td> </tr> </tbody> </table> </fieldset> </div> <div class="insert-box"> <input type="text" name="recaptcha" class="tag code" readonly="readonly" onfocus="this.select()" /> <div class="submitbox"> <input type="button" class="button button-primary insert-tag" value="<?php echo esc_attr( __( 'Insert Tag', 'contact-form-7' ) ); ?>" /> </div> </div> <?php } function wpcf7_recaptcha_response() { if ( isset( $_POST['g-recaptcha-response'] ) ) { return $_POST['g-recaptcha-response']; } return false; }
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