655 lines
24 KiB
PHP
655 lines
24 KiB
PHP
<?php
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/**
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* Download handler
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*
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* Handle digital downloads.
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*
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* @package WooCommerce\Classes
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* @version 2.2.0
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*/
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defined( 'ABSPATH' ) || exit;
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/**
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* Download handler class.
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*/
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class WC_Download_Handler {
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/**
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* Hook in methods.
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*/
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public static function init() {
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if ( isset( $_GET['download_file'], $_GET['order'] ) && ( isset( $_GET['email'] ) || isset( $_GET['uid'] ) ) ) { // WPCS: input var ok, CSRF ok.
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add_action( 'init', array( __CLASS__, 'download_product' ) );
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}
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add_action( 'woocommerce_download_file_redirect', array( __CLASS__, 'download_file_redirect' ), 10, 2 );
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add_action( 'woocommerce_download_file_xsendfile', array( __CLASS__, 'download_file_xsendfile' ), 10, 2 );
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add_action( 'woocommerce_download_file_force', array( __CLASS__, 'download_file_force' ), 10, 2 );
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}
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/**
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* Check if we need to download a file and check validity.
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*/
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public static function download_product() {
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$product_id = absint( $_GET['download_file'] ); // phpcs:ignore WordPress.VIP.SuperGlobalInputUsage.AccessDetected, WordPress.VIP.ValidatedSanitizedInput.InputNotValidated, WordPress.Security.ValidatedSanitizedInput.InputNotValidated
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$product = wc_get_product( $product_id );
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$data_store = WC_Data_Store::load( 'customer-download' );
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if ( ! $product || empty( $_GET['key'] ) || empty( $_GET['order'] ) ) { // WPCS: input var ok, CSRF ok.
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self::download_error( __( 'Invalid download link.', 'woocommerce' ) );
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}
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// Fallback, accept email address if it's passed.
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if ( empty( $_GET['email'] ) && empty( $_GET['uid'] ) ) { // WPCS: input var ok, CSRF ok.
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self::download_error( __( 'Invalid download link.', 'woocommerce' ) );
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}
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$order_id = wc_get_order_id_by_order_key( wc_clean( wp_unslash( $_GET['order'] ) ) ); // WPCS: input var ok, CSRF ok.
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$order = wc_get_order( $order_id );
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if ( isset( $_GET['email'] ) ) { // WPCS: input var ok, CSRF ok.
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$email_address = wp_unslash( $_GET['email'] ); // WPCS: input var ok, CSRF ok, sanitization ok.
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} else {
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// Get email address from order to verify hash.
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$email_address = is_a( $order, 'WC_Order' ) ? $order->get_billing_email() : null;
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// Prepare email address hash.
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$email_hash = function_exists( 'hash' ) ? hash( 'sha256', $email_address ) : sha1( $email_address );
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if ( is_null( $email_address ) || ! hash_equals( wp_unslash( $_GET['uid'] ), $email_hash ) ) { // WPCS: input var ok, CSRF ok, sanitization ok.
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self::download_error( __( 'Invalid download link.', 'woocommerce' ) );
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}
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}
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$download_ids = $data_store->get_downloads(
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array(
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'user_email' => sanitize_email( str_replace( ' ', '+', $email_address ) ),
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'order_key' => wc_clean( wp_unslash( $_GET['order'] ) ), // WPCS: input var ok, CSRF ok.
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'product_id' => $product_id,
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'download_id' => wc_clean( preg_replace( '/\s+/', ' ', wp_unslash( $_GET['key'] ) ) ), // WPCS: input var ok, CSRF ok, sanitization ok.
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'orderby' => 'downloads_remaining',
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'order' => 'DESC',
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'limit' => 1,
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'return' => 'ids',
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)
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);
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if ( empty( $download_ids ) ) {
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self::download_error( __( 'Invalid download link.', 'woocommerce' ) );
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}
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$download = new WC_Customer_Download( current( $download_ids ) );
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/**
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* Filter download filepath.
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*
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* @since 4.0.0
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* @param string $file_path File path.
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* @param string $email_address Email address.
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* @param WC_Order|bool $order Order object or false.
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* @param WC_Product $product Product object.
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* @param WC_Customer_Download $download Download data.
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*/
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$file_path = apply_filters(
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'woocommerce_download_product_filepath',
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$product->get_file_download_path( $download->get_download_id() ),
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$email_address,
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$order,
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$product,
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$download
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);
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$parsed_file_path = self::parse_file_path( $file_path );
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$download_range = self::get_download_range( @filesize( $parsed_file_path['file_path'] ) ); // @codingStandardsIgnoreLine.
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self::check_order_is_valid( $download );
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if ( ! $download_range['is_range_request'] ) {
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// If the remaining download count goes to 0, allow range requests to be able to finish streaming from iOS devices.
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self::check_downloads_remaining( $download );
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}
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self::check_download_expiry( $download );
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self::check_download_login_required( $download );
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do_action(
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'woocommerce_download_product',
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$download->get_user_email(),
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$download->get_order_key(),
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$download->get_product_id(),
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$download->get_user_id(),
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$download->get_download_id(),
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$download->get_order_id()
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);
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$download->save();
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// Track the download in logs and change remaining/counts.
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$current_user_id = get_current_user_id();
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$ip_address = WC_Geolocation::get_ip_address();
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if ( ! $download_range['is_range_request'] ) {
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$download->track_download( $current_user_id > 0 ? $current_user_id : null, ! empty( $ip_address ) ? $ip_address : null );
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}
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self::download( $file_path, $download->get_product_id() );
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}
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/**
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* Check if an order is valid for downloading from.
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*
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* @param WC_Customer_Download $download Download instance.
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*/
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private static function check_order_is_valid( $download ) {
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if ( $download->get_order_id() ) {
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$order = wc_get_order( $download->get_order_id() );
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if ( $order && ! $order->is_download_permitted() ) {
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self::download_error( __( 'Invalid order.', 'woocommerce' ), '', 403 );
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}
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}
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}
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/**
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* Check if there are downloads remaining.
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*
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* @param WC_Customer_Download $download Download instance.
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*/
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private static function check_downloads_remaining( $download ) {
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if ( '' !== $download->get_downloads_remaining() && 0 >= $download->get_downloads_remaining() ) {
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self::download_error( __( 'Sorry, you have reached your download limit for this file', 'woocommerce' ), '', 403 );
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}
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}
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/**
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* Check if the download has expired.
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*
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* @param WC_Customer_Download $download Download instance.
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*/
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private static function check_download_expiry( $download ) {
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if ( ! is_null( $download->get_access_expires() ) && $download->get_access_expires()->getTimestamp() < strtotime( 'midnight', time() ) ) {
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self::download_error( __( 'Sorry, this download has expired', 'woocommerce' ), '', 403 );
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}
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}
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/**
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* Check if a download requires the user to login first.
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*
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* @param WC_Customer_Download $download Download instance.
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*/
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private static function check_download_login_required( $download ) {
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if ( $download->get_user_id() && 'yes' === get_option( 'woocommerce_downloads_require_login' ) ) {
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if ( ! is_user_logged_in() ) {
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if ( wc_get_page_id( 'myaccount' ) ) {
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wp_safe_redirect( add_query_arg( 'wc_error', rawurlencode( __( 'You must be logged in to download files.', 'woocommerce' ) ), wc_get_page_permalink( 'myaccount' ) ) );
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exit;
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} else {
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self::download_error( __( 'You must be logged in to download files.', 'woocommerce' ) . ' <a href="' . esc_url( wp_login_url( wc_get_page_permalink( 'myaccount' ) ) ) . '" class="wc-forward">' . __( 'Login', 'woocommerce' ) . '</a>', __( 'Log in to Download Files', 'woocommerce' ), 403 );
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}
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} elseif ( ! current_user_can( 'download_file', $download ) ) {
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self::download_error( __( 'This is not your download link.', 'woocommerce' ), '', 403 );
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}
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}
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}
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/**
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* Count download.
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*
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* @deprecated 4.4.0
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* @param array $download_data Download data.
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*/
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public static function count_download( $download_data ) {
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wc_deprecated_function( 'WC_Download_Handler::count_download', '4.4.0', '' );
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}
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/**
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* Download a file - hook into init function.
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*
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* @param string $file_path URL to file.
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* @param integer $product_id Product ID of the product being downloaded.
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*/
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public static function download( $file_path, $product_id ) {
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if ( ! $file_path ) {
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self::download_error( __( 'No file defined', 'woocommerce' ) );
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}
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$filename = basename( $file_path );
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if ( strstr( $filename, '?' ) ) {
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$filename = current( explode( '?', $filename ) );
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}
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$filename = apply_filters( 'woocommerce_file_download_filename', $filename, $product_id );
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/**
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* Filter download method.
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*
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* @since 4.5.0
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* @param string $method Download method.
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* @param int $product_id Product ID.
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* @param string $file_path URL to file.
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*/
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$file_download_method = apply_filters( 'woocommerce_file_download_method', get_option( 'woocommerce_file_download_method', 'force' ), $product_id, $file_path );
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// Add action to prevent issues in IE.
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add_action( 'nocache_headers', array( __CLASS__, 'ie_nocache_headers_fix' ) );
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// Trigger download via one of the methods.
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do_action( 'woocommerce_download_file_' . $file_download_method, $file_path, $filename );
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}
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/**
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* Redirect to a file to start the download.
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*
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* @param string $file_path File path.
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* @param string $filename File name.
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*/
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public static function download_file_redirect( $file_path, $filename = '' ) {
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header( 'Location: ' . $file_path );
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exit;
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}
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/**
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* Parse file path and see if its remote or local.
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*
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* @param string $file_path File path.
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* @return array
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*/
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public static function parse_file_path( $file_path ) {
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$wp_uploads = wp_upload_dir();
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$wp_uploads_dir = $wp_uploads['basedir'];
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$wp_uploads_url = $wp_uploads['baseurl'];
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/**
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* Replace uploads dir, site url etc with absolute counterparts if we can.
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* Note the str_replace on site_url is on purpose, so if https is forced
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* via filters we can still do the string replacement on a HTTP file.
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*/
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$replacements = array(
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$wp_uploads_url => $wp_uploads_dir,
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network_site_url( '/', 'https' ) => ABSPATH,
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str_replace( 'https:', 'http:', network_site_url( '/', 'http' ) ) => ABSPATH,
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site_url( '/', 'https' ) => ABSPATH,
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str_replace( 'https:', 'http:', site_url( '/', 'http' ) ) => ABSPATH,
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);
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$count = 0;
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$file_path = str_replace( array_keys( $replacements ), array_values( $replacements ), $file_path );
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$parsed_file_path = wp_parse_url( $file_path );
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$remote_file = null === $count || 0 === $count; // Remote file only if there were no replacements.
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// Paths that begin with '//' are always remote URLs.
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if ( '//' === substr( $file_path, 0, 2 ) ) {
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return array(
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'remote_file' => true,
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'file_path' => is_ssl() ? 'https:' . $file_path : 'http:' . $file_path,
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);
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}
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// See if path needs an abspath prepended to work.
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if ( file_exists( ABSPATH . $file_path ) ) {
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$remote_file = false;
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$file_path = ABSPATH . $file_path;
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} elseif ( '/wp-content' === substr( $file_path, 0, 11 ) ) {
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$remote_file = false;
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$file_path = realpath( WP_CONTENT_DIR . substr( $file_path, 11 ) );
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// Check if we have an absolute path.
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} elseif ( ( ! isset( $parsed_file_path['scheme'] ) || ! in_array( $parsed_file_path['scheme'], array( 'http', 'https', 'ftp' ), true ) ) && isset( $parsed_file_path['path'] ) ) {
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$remote_file = false;
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$file_path = $parsed_file_path['path'];
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}
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return array(
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'remote_file' => $remote_file,
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'file_path' => $file_path,
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);
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}
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/**
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* Download a file using X-Sendfile, X-Lighttpd-Sendfile, or X-Accel-Redirect if available.
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*
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* @param string $file_path File path.
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* @param string $filename File name.
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*/
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public static function download_file_xsendfile( $file_path, $filename ) {
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$parsed_file_path = self::parse_file_path( $file_path );
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/**
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* Fallback on force download method for remote files. This is because:
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* 1. xsendfile needs proxy configuration to work for remote files, which cannot be assumed to be available on most hosts.
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* 2. Force download method is more secure than redirect method if `allow_url_fopen` is enabled in `php.ini`.
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*/
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if ( $parsed_file_path['remote_file'] && ! apply_filters( 'woocommerce_use_xsendfile_for_remote', false ) ) {
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do_action( 'woocommerce_download_file_force', $file_path, $filename );
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return;
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}
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if ( function_exists( 'apache_get_modules' ) && in_array( 'mod_xsendfile', apache_get_modules(), true ) ) {
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self::download_headers( $parsed_file_path['file_path'], $filename );
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$filepath = apply_filters( 'woocommerce_download_file_xsendfile_file_path', $parsed_file_path['file_path'], $file_path, $filename, $parsed_file_path );
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header( 'X-Sendfile: ' . $filepath );
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exit;
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} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'lighttpd' ) ) {
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self::download_headers( $parsed_file_path['file_path'], $filename );
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$filepath = apply_filters( 'woocommerce_download_file_xsendfile_lighttpd_file_path', $parsed_file_path['file_path'], $file_path, $filename, $parsed_file_path );
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header( 'X-Lighttpd-Sendfile: ' . $filepath );
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exit;
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} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'nginx' ) || stristr( getenv( 'SERVER_SOFTWARE' ), 'cherokee' ) ) {
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self::download_headers( $parsed_file_path['file_path'], $filename );
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$xsendfile_path = trim( preg_replace( '`^' . str_replace( '\\', '/', getcwd() ) . '`', '', $parsed_file_path['file_path'] ), '/' );
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$xsendfile_path = apply_filters( 'woocommerce_download_file_xsendfile_x_accel_redirect_file_path', $xsendfile_path, $file_path, $filename, $parsed_file_path );
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header( "X-Accel-Redirect: /$xsendfile_path" );
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exit;
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}
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// Fallback.
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wc_get_logger()->warning(
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sprintf(
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/* translators: %1$s contains the filepath of the digital asset. */
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__( '%1$s could not be served using the X-Accel-Redirect/X-Sendfile method. A Force Download will be used instead.', 'woocommerce' ),
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$file_path
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)
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);
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self::download_file_force( $file_path, $filename );
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}
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/**
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* Parse the HTTP_RANGE request from iOS devices.
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* Does not support multi-range requests.
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*
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* @param int $file_size Size of file in bytes.
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* @return array {
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* Information about range download request: beginning and length of
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* file chunk, whether the range is valid/supported and whether the request is a range request.
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*
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* @type int $start Byte offset of the beginning of the range. Default 0.
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* @type int $length Length of the requested file chunk in bytes. Optional.
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* @type bool $is_range_valid Whether the requested range is a valid and supported range.
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* @type bool $is_range_request Whether the request is a range request.
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* }
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*/
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protected static function get_download_range( $file_size ) {
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$start = 0;
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$download_range = array(
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'start' => $start,
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'is_range_valid' => false,
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'is_range_request' => false,
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);
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if ( ! $file_size ) {
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return $download_range;
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}
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$end = $file_size - 1;
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$download_range['length'] = $file_size;
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if ( isset( $_SERVER['HTTP_RANGE'] ) ) { // @codingStandardsIgnoreLine.
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$http_range = sanitize_text_field( wp_unslash( $_SERVER['HTTP_RANGE'] ) ); // WPCS: input var ok.
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$download_range['is_range_request'] = true;
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$c_start = $start;
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$c_end = $end;
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// Extract the range string.
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list( , $range ) = explode( '=', $http_range, 2 );
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// Make sure the client hasn't sent us a multibyte range.
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if ( strpos( $range, ',' ) !== false ) {
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return $download_range;
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}
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/*
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* If the range starts with an '-' we start from the beginning.
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* If not, we forward the file pointer
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* and make sure to get the end byte if specified.
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*/
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if ( '-' === $range[0] ) {
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// The n-number of the last bytes is requested.
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$c_start = $file_size - substr( $range, 1 );
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} else {
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$range = explode( '-', $range );
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$c_start = ( isset( $range[0] ) && is_numeric( $range[0] ) ) ? (int) $range[0] : 0;
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$c_end = ( isset( $range[1] ) && is_numeric( $range[1] ) ) ? (int) $range[1] : $file_size;
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}
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/*
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* Check the range and make sure it's treated according to the specs: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html.
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* End bytes can not be larger than $end.
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*/
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$c_end = ( $c_end > $end ) ? $end : $c_end;
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// Validate the requested range and return an error if it's not correct.
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if ( $c_start > $c_end || $c_start > $file_size - 1 || $c_end >= $file_size ) {
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return $download_range;
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}
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$start = $c_start;
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$end = $c_end;
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$length = $end - $start + 1;
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$download_range['start'] = $start;
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$download_range['length'] = $length;
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$download_range['is_range_valid'] = true;
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}
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return $download_range;
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}
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/**
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* Force download - this is the default method.
|
|
*
|
|
* @param string $file_path File path.
|
|
* @param string $filename File name.
|
|
*/
|
|
public static function download_file_force( $file_path, $filename ) {
|
|
$parsed_file_path = self::parse_file_path( $file_path );
|
|
$download_range = self::get_download_range( @filesize( $parsed_file_path['file_path'] ) ); // @codingStandardsIgnoreLine.
|
|
|
|
self::download_headers( $parsed_file_path['file_path'], $filename, $download_range );
|
|
|
|
$start = isset( $download_range['start'] ) ? $download_range['start'] : 0;
|
|
$length = isset( $download_range['length'] ) ? $download_range['length'] : 0;
|
|
if ( ! self::readfile_chunked( $parsed_file_path['file_path'], $start, $length ) ) {
|
|
if ( $parsed_file_path['remote_file'] && 'yes' === get_option( 'woocommerce_downloads_redirect_fallback_allowed' ) ) {
|
|
wc_get_logger()->warning(
|
|
sprintf(
|
|
/* translators: %1$s contains the filepath of the digital asset. */
|
|
__( '%1$s could not be served using the Force Download method. A redirect will be used instead.', 'woocommerce' ),
|
|
$file_path
|
|
)
|
|
);
|
|
self::download_file_redirect( $file_path );
|
|
} else {
|
|
self::download_error( __( 'File not found', 'woocommerce' ) );
|
|
}
|
|
}
|
|
|
|
exit;
|
|
}
|
|
|
|
/**
|
|
* Get content type of a download.
|
|
*
|
|
* @param string $file_path File path.
|
|
* @return string
|
|
*/
|
|
private static function get_download_content_type( $file_path ) {
|
|
$file_extension = strtolower( substr( strrchr( $file_path, '.' ), 1 ) );
|
|
$ctype = 'application/force-download';
|
|
|
|
foreach ( get_allowed_mime_types() as $mime => $type ) {
|
|
$mimes = explode( '|', $mime );
|
|
if ( in_array( $file_extension, $mimes, true ) ) {
|
|
$ctype = $type;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $ctype;
|
|
}
|
|
|
|
/**
|
|
* Set headers for the download.
|
|
*
|
|
* @param string $file_path File path.
|
|
* @param string $filename File name.
|
|
* @param array $download_range Array containing info about range download request (see {@see get_download_range} for structure).
|
|
*/
|
|
private static function download_headers( $file_path, $filename, $download_range = array() ) {
|
|
self::check_server_config();
|
|
self::clean_buffers();
|
|
wc_nocache_headers();
|
|
|
|
header( 'X-Robots-Tag: noindex, nofollow', true );
|
|
header( 'Content-Type: ' . self::get_download_content_type( $file_path ) );
|
|
header( 'Content-Description: File Transfer' );
|
|
header( 'Content-Disposition: attachment; filename="' . $filename . '";' );
|
|
header( 'Content-Transfer-Encoding: binary' );
|
|
|
|
$file_size = @filesize( $file_path ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
if ( ! $file_size ) {
|
|
return;
|
|
}
|
|
|
|
if ( isset( $download_range['is_range_request'] ) && true === $download_range['is_range_request'] ) {
|
|
if ( false === $download_range['is_range_valid'] ) {
|
|
header( 'HTTP/1.1 416 Requested Range Not Satisfiable' );
|
|
header( 'Content-Range: bytes 0-' . ( $file_size - 1 ) . '/' . $file_size );
|
|
exit;
|
|
}
|
|
|
|
$start = $download_range['start'];
|
|
$end = $download_range['start'] + $download_range['length'] - 1;
|
|
$length = $download_range['length'];
|
|
|
|
header( 'HTTP/1.1 206 Partial Content' );
|
|
header( "Accept-Ranges: 0-$file_size" );
|
|
header( "Content-Range: bytes $start-$end/$file_size" );
|
|
header( "Content-Length: $length" );
|
|
} else {
|
|
header( 'Content-Length: ' . $file_size );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check and set certain server config variables to ensure downloads work as intended.
|
|
*/
|
|
private static function check_server_config() {
|
|
wc_set_time_limit( 0 );
|
|
if ( function_exists( 'apache_setenv' ) ) {
|
|
@apache_setenv( 'no-gzip', 1 ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.PHP.DiscouragedPHPFunctions.runtime_configuration_apache_setenv
|
|
}
|
|
@ini_set( 'zlib.output_compression', 'Off' ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.PHP.DiscouragedPHPFunctions.runtime_configuration_ini_set
|
|
@session_write_close(); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.VIP.SessionFunctionsUsage.session_session_write_close
|
|
}
|
|
|
|
/**
|
|
* Clean all output buffers.
|
|
*
|
|
* Can prevent errors, for example: transfer closed with 3 bytes remaining to read.
|
|
*/
|
|
private static function clean_buffers() {
|
|
if ( ob_get_level() ) {
|
|
$levels = ob_get_level();
|
|
for ( $i = 0; $i < $levels; $i++ ) {
|
|
@ob_end_clean(); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
}
|
|
} else {
|
|
@ob_end_clean(); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read file chunked.
|
|
*
|
|
* Reads file in chunks so big downloads are possible without changing PHP.INI - http://codeigniter.com/wiki/Download_helper_for_large_files/.
|
|
*
|
|
* @param string $file File.
|
|
* @param int $start Byte offset/position of the beginning from which to read from the file.
|
|
* @param int $length Length of the chunk to be read from the file in bytes, 0 means full file.
|
|
* @return bool Success or fail
|
|
*/
|
|
public static function readfile_chunked( $file, $start = 0, $length = 0 ) {
|
|
if ( ! defined( 'WC_CHUNK_SIZE' ) ) {
|
|
define( 'WC_CHUNK_SIZE', 1024 * 1024 );
|
|
}
|
|
$handle = @fopen( $file, 'r' ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_read_fopen
|
|
|
|
if ( false === $handle ) {
|
|
return false;
|
|
}
|
|
|
|
if ( ! $length ) {
|
|
$length = @filesize( $file ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
}
|
|
|
|
$read_length = (int) WC_CHUNK_SIZE;
|
|
|
|
if ( $length ) {
|
|
$end = $start + $length - 1;
|
|
|
|
@fseek( $handle, $start ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
$p = @ftell( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
|
|
while ( ! @feof( $handle ) && $p <= $end ) { // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
// Don't run past the end of file.
|
|
if ( $p + $read_length > $end ) {
|
|
$read_length = $end - $p + 1;
|
|
}
|
|
|
|
echo @fread( $handle, $read_length ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.XSS.EscapeOutput.OutputNotEscaped, WordPress.WP.AlternativeFunctions.file_system_read_fread
|
|
$p = @ftell( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
|
|
|
|
if ( ob_get_length() ) {
|
|
ob_flush();
|
|
flush();
|
|
}
|
|
}
|
|
} else {
|
|
while ( ! @feof( $handle ) ) { // @codingStandardsIgnoreLine.
|
|
echo @fread( $handle, $read_length ); // @codingStandardsIgnoreLine.
|
|
if ( ob_get_length() ) {
|
|
ob_flush();
|
|
flush();
|
|
}
|
|
}
|
|
}
|
|
|
|
return @fclose( $handle ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged, WordPress.WP.AlternativeFunctions.file_system_read_fclose
|
|
}
|
|
|
|
/**
|
|
* Filter headers for IE to fix issues over SSL.
|
|
*
|
|
* IE bug prevents download via SSL when Cache Control and Pragma no-cache headers set.
|
|
*
|
|
* @param array $headers HTTP headers.
|
|
* @return array
|
|
*/
|
|
public static function ie_nocache_headers_fix( $headers ) {
|
|
if ( is_ssl() && ! empty( $GLOBALS['is_IE'] ) ) {
|
|
$headers['Cache-Control'] = 'private';
|
|
unset( $headers['Pragma'] );
|
|
}
|
|
return $headers;
|
|
}
|
|
|
|
/**
|
|
* Die with an error message if the download fails.
|
|
*
|
|
* @param string $message Error message.
|
|
* @param string $title Error title.
|
|
* @param integer $status Error status.
|
|
*/
|
|
private static function download_error( $message, $title = '', $status = 404 ) {
|
|
/*
|
|
* Since we will now render a message instead of serving a download, we should unwind some of the previously set
|
|
* headers.
|
|
*/
|
|
header( 'Content-Type: ' . get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ) );
|
|
header_remove( 'Content-Description;' );
|
|
header_remove( 'Content-Disposition' );
|
|
header_remove( 'Content-Transfer-Encoding' );
|
|
|
|
if ( ! strstr( $message, '<a ' ) ) {
|
|
$message .= ' <a href="' . esc_url( wc_get_page_permalink( 'shop' ) ) . '" class="wc-forward">' . esc_html__( 'Go to shop', 'woocommerce' ) . '</a>';
|
|
}
|
|
wp_die( $message, $title, array( 'response' => $status ) ); // WPCS: XSS ok.
|
|
}
|
|
}
|
|
|
|
WC_Download_Handler::init();
|