woocommerce/woocommerce

<?php

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}

/**
 * WC_HTTPS class.
 *
 * @class    WC_HTTPS
 * @version  2.2.0
 * @package  WooCommerce\Classes
 * @category Class
 * @author   WooThemes
 */
class WC_HTTPS {

    /**
     * Hook in our HTTPS functions if we're on the frontend. This will ensure any links output to a page (when viewing via HTTPS) are also served over HTTPS.
     */
    public static function init() {
        if ( 'yes' === get_option( 'woocommerce_force_ssl_checkout' ) && ! is_admin() ) {
            // HTTPS urls with SSL on
            $filters = array(
                'post_thumbnail_html',
                'wp_get_attachment_image_attributes',
                'wp_get_attachment_url',
                'option_stylesheet_url',
                'option_template_url',
                'script_loader_src',
                'style_loader_src',
                'template_directory_uri',
                'stylesheet_directory_uri',
                'site_url',
            );

            foreach ( $filters as $filter ) {
                add_filter( $filter, array( __CLASS__, 'force_https_url' ), 999 );
            }

            add_filter( 'page_link', array( __CLASS__, 'force_https_page_link' ), 10, 2 );
            add_action( 'template_redirect', array( __CLASS__, 'force_https_template_redirect' ) );

            if ( 'yes' == get_option( 'woocommerce_unforce_ssl_checkout' ) ) {
                add_action( 'template_redirect', array( __CLASS__, 'unforce_https_template_redirect' ) );
            }
        }
        add_action( 'http_api_curl', array( __CLASS__, 'http_api_curl' ), 10, 3 );
    }

    /**
     * Force https for urls.
     *
     * @param mixed $content
     * @return string
     */
    public static function force_https_url( $content ) {
        if ( is_ssl() ) {
            if ( is_array( $content ) ) {
                $content = array_map( 'WC_HTTPS::force_https_url', $content );
            } else {
                $content = str_replace( 'http:', 'https:', $content );
            }
        }
        return $content;
    }

    /**
     * Force a post link to be SSL if needed.
     *
     * @param string $link
     * @param int $page_id
     *
     * @return string
     */
    public static function force_https_page_link( $link, $page_id ) {
        if ( in_array( $page_id, array( get_option( 'woocommerce_checkout_page_id' ), get_option( 'woocommerce_myaccount_page_id' ) ) ) ) {
            $link = str_replace( 'http:', 'https:', $link );
        } elseif ( 'yes' === get_option( 'woocommerce_unforce_ssl_checkout' ) && ! wc_site_is_https() ) {
            $link = str_replace( 'https:', 'http:', $link );
        }
        return $link;
    }

    /**
     * Template redirect - if we end up on a page ensure it has the correct http/https url.
     */
    public static function force_https_template_redirect() {
        if ( ! is_ssl() && ( is_checkout() || is_account_page() || apply_filters( 'woocommerce_force_ssl_checkout', false ) ) ) {

            if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
                wp_safe_redirect( preg_replace( '|^http://|', 'https://', $_SERVER['REQUEST_URI'] ) );
                exit;
            } else {
                wp_safe_redirect( 'https://' . ( ! empty( $_SERVER['HTTP_X_FORWARDED_HOST'] ) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'] ) . $_SERVER['REQUEST_URI'] );
                exit;
            }
        }
    }

    /**
     * Template redirect - if we end up on a page ensure it has the correct http/https url.
     */
    public static function unforce_https_template_redirect() {
        if ( function_exists( 'is_customize_preview' ) && is_customize_preview() ) {
            return;
        }

        if ( ! wc_site_is_https() && is_ssl() && $_SERVER['REQUEST_URI'] && ! is_checkout() && ! is_ajax() && ! is_account_page() && apply_filters( 'woocommerce_unforce_ssl_checkout', true ) ) {

            if ( 0 === strpos( $_SERVER['REQUEST_URI'], 'http' ) ) {
                wp_safe_redirect( preg_replace( '|^https://|', 'http://', $_SERVER['REQUEST_URI'] ) );
                exit;
            } else {
                wp_safe_redirect( 'http://' . ( ! empty( $_SERVER['HTTP_X_FORWARDED_HOST'] ) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : $_SERVER['HTTP_HOST'] ) . $_SERVER['REQUEST_URI'] );
                exit;
            }
        }
    }

    /**
     * Force posts to PayPal to use TLS v1.2. See:
     *        https://core.trac.wordpress.org/ticket/36320
     *        https://core.trac.wordpress.org/ticket/34924#comment:13
     *        https://www.paypal-knowledge.com/infocenter/index?page=content&widgetview=true&id=FAQ1914&viewlocale=en_US
     *
     * @param string $handle
     * @param mixed $r
     * @param string $url
     */
    public static function http_api_curl( $handle, $r, $url ) {
        if ( strstr( $url, 'https://' ) && ( strstr( $url, '.paypal.com/nvp' ) || strstr( $url, '.paypal.com/cgi-bin/webscr' ) ) ) {
            curl_setopt( $handle, CURLOPT_SSLVERSION, 6 );
        }
    }
}

WC_HTTPS::init();