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<?php
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
/**
* Download handler
*
* Handle digital downloads.
*
* @class WC_Download_Handler
* @version 2.2.0
* @package WooCommerce/Classes
* @category Class
* @author WooThemes
*/
class WC_Download_Handler {
/**
* Hook in methods
*/
public static function init() {
add_action( 'init', array( __CLASS__, 'download_product' ) );
}
/**
* Check if we need to download a file and check validity
*/
public static function download_product() {
if ( isset( $_GET['download_file'] ) && isset( $_GET['order'] ) && isset( $_GET['email'] ) ) {
global $wpdb;
$product_id = (int) $_GET['download_file'];
$order_key = $_GET['order'];
$email = sanitize_email( str_replace( ' ', '+', $_GET['email'] ) );
$download_id = isset( $_GET['key'] ) ? preg_replace( '/\s+/', ' ', $_GET['key'] ) : '';
$_product = wc_get_product( $product_id );
if ( ! is_email( $email) ) {
wp_die( __( 'Invalid email address.', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 403 ) );
}
$query = "
SELECT order_id,downloads_remaining,user_id,download_count,access_expires,download_id
FROM " . $wpdb->prefix . "woocommerce_downloadable_product_permissions
WHERE user_email = %s
AND order_key = %s
AND product_id = %s";
$args = array(
$email,
$order_key,
$product_id
);
if ( $download_id ) {
// backwards compatibility for existing download URLs
$query .= " AND download_id = %s";
$args[] = $download_id;
}
$download_result = $wpdb->get_row( $wpdb->prepare( $query, $args ) );
if ( ! $download_result ) {
wp_die( __( 'Invalid download.', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 404 ) );
}
$download_id = $download_result->download_id;
$order_id = $download_result->order_id;
$downloads_remaining = $download_result->downloads_remaining;
$download_count = $download_result->download_count;
$user_id = $download_result->user_id;
$access_expires = $download_result->access_expires;
if ( $user_id && get_option( 'woocommerce_downloads_require_login' ) == 'yes' ) {
if ( ! is_user_logged_in() ) {
wp_die( __( 'You must be logged in to download files.', 'woocommerce' ) . ' <a href="' . esc_url( wp_login_url( get_permalink( wc_get_page_id( 'myaccount' ) ) ) ) . '" class="wc-forward">' . __( 'Login', 'woocommerce' ) . '</a>', __( 'Log in to Download Files', 'woocommerce' ), '', array( 'response' => 403 ) );
} elseif ( ! current_user_can( 'download_file', $download_result ) ) {
wp_die( __( 'This is not your download link.', 'woocommerce' ), '', array( 'response' => 403 ) );
}
}
if ( ! get_post( $product_id ) ) {
wp_die( __( 'Product no longer exists.', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 404 ) );
}
if ( $order_id ) {
$order = wc_get_order( $order_id );
if ( ! $order->is_download_permitted() ) {
wp_die( __( 'Invalid order.', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 404 ) );
}
}
if ( $downloads_remaining == '0' ) {
wp_die( __( 'Sorry, you have reached your download limit for this file', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 403 ) );
}
if ( $access_expires > 0 && strtotime( $access_expires) < current_time( 'timestamp' ) ) {
wp_die( __( 'Sorry, this download has expired', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 403 ) );
}
if ( $downloads_remaining > 0 ) {
$wpdb->update( $wpdb->prefix . "woocommerce_downloadable_product_permissions", array(
'downloads_remaining' => $downloads_remaining - 1,
), array(
'user_email' => $email,
'order_key' => $order_key,
'product_id' => $product_id,
'download_id' => $download_id
), array( '%d' ), array( '%s', '%s', '%d', '%s' ) );
}
// Count the download
$wpdb->update( $wpdb->prefix . "woocommerce_downloadable_product_permissions", array(
'download_count' => $download_count + 1,
), array(
'user_email' => $email,
'order_key' => $order_key,
'product_id' => $product_id,
'download_id' => $download_id
), array( '%d' ), array( '%s', '%s', '%d', '%s' ) );
// Trigger action
do_action( 'woocommerce_download_product', $email, $order_key, $product_id, $user_id, $download_id, $order_id );
// Get the download URL and try to replace the url with a path
$file_path = $_product->get_file_download_path( $download_id );
// Download it!
self::download( $file_path, $product_id );
}
}
/**
* Download a file - hook into init function.
* @param integer $product_id
*/
public static function download( $file_path, $product_id ) {
global $is_IE;
$file_download_method = apply_filters( 'woocommerce_file_download_method', get_option( 'woocommerce_file_download_method' ), $product_id );
if ( ! $file_path ) {
wp_die( __( 'No file defined', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 404 ) );
}
// Redirect to the file...
if ( $file_download_method == "redirect" ) {
header( 'Location: ' . $file_path );
exit;
}
// ...or serve it
$remote_file = true;
$parsed_file_path = parse_url( $file_path );
$wp_uploads = wp_upload_dir();
$wp_uploads_dir = $wp_uploads['basedir'];
$wp_uploads_url = $wp_uploads['baseurl'];
if ( ( ! isset( $parsed_file_path['scheme'] ) || ! in_array( $parsed_file_path['scheme'], array( 'http', 'https', 'ftp' ) ) ) && isset( $parsed_file_path['path'] ) && file_exists( $parsed_file_path['path'] ) ) {
/** This is an absolute path */
$remote_file = false;
} elseif( strpos( $file_path, $wp_uploads_url ) !== false ) {
/** This is a local file given by URL so we need to figure out the path */
$remote_file = false;
$file_path = str_replace( $wp_uploads_url, $wp_uploads_dir, $file_path );
} elseif( is_multisite() && ( strpos( $file_path, network_site_url( '/', 'http' ) ) !== false || strpos( $file_path, network_site_url( '/', 'https' ) ) !== false ) ) {
/** This is a local file outside of wp-content so figure out the path */
$remote_file = false;
// Try to replace network url
$file_path = str_replace( network_site_url( '/', 'https' ), ABSPATH, $file_path );
$file_path = str_replace( network_site_url( '/', 'http' ), ABSPATH, $file_path );
// Try to replace upload URL
$file_path = str_replace( $wp_uploads_url, $wp_uploads_dir, $file_path );
} elseif( strpos( $file_path, site_url( '/', 'http' ) ) !== false || strpos( $file_path, site_url( '/', 'https' ) ) !== false ) {
/** This is a local file outside of wp-content so figure out the path */
$remote_file = false;
$file_path = str_replace( site_url( '/', 'https' ), ABSPATH, $file_path );
$file_path = str_replace( site_url( '/', 'http' ), ABSPATH, $file_path );
} elseif ( file_exists( ABSPATH . $file_path ) ) {
/** Path needs an abspath to work */
$remote_file = false;
$file_path = ABSPATH . $file_path;
}
if ( ! $remote_file ) {
// Remove Query String
if ( strstr( $file_path, '?' ) ) {
$file_path = current( explode( '?', $file_path ) );
}
// Run realpath
$file_path = realpath( $file_path );
}
// Get extension and type
$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 ) ) {
$ctype = $type;
break;
}
}
// Start setting headers
if ( ! ini_get('safe_mode') ) {
@set_time_limit(0);
}
if ( function_exists( 'get_magic_quotes_runtime' ) && get_magic_quotes_runtime() ) {
@set_magic_quotes_runtime(0);
}
if ( function_exists( 'apache_setenv' ) ) {
@apache_setenv( 'no-gzip', 1 );
}
@session_write_close();
@ini_set( 'zlib.output_compression', 'Off' );
/**
* Prevents errors, for example: transfer closed with 3 bytes remaining to read
*/
if ( ob_get_length() ) {
if ( ob_get_level() ) {
$levels = ob_get_level();
for ( $i = 0; $i < $levels; $i++ ) {
ob_end_clean(); // Zip corruption fix
}
} else {
ob_end_clean(); // Clear the output buffer
}
}
if ( $is_IE && is_ssl() ) {
// IE bug prevents download via SSL when Cache Control and Pragma no-cache headers set.
header( 'Expires: Wed, 11 Jan 1984 05:00:00 GMT' );
header( 'Cache-Control: private' );
} else {
nocache_headers();
}
$filename = basename( $file_path );
if ( strstr( $filename, '?' ) ) {
$filename = current( explode( '?', $filename ) );
}
$filename = apply_filters( 'woocommerce_file_download_filename', $filename, $product_id );
header( "X-Robots-Tag: noindex, nofollow", true );
header( "Content-Type: " . $ctype );
header( "Content-Description: File Transfer" );
header( "Content-Disposition: attachment; filename=\"" . $filename . "\";" );
header( "Content-Transfer-Encoding: binary" );
if ( $size = @filesize( $file_path ) ) {
header( "Content-Length: " . $size );
}
if ( $file_download_method == 'xsendfile' ) {
// Path fix - kudos to Jason Judge
if ( getcwd() ) {
$file_path = trim( preg_replace( '`^' . str_replace( '\\', '/', getcwd() ) . '`' , '', $file_path ), '/' );
}
header( "Content-Disposition: attachment; filename=\"" . $filename . "\";" );
if ( function_exists( 'apache_get_modules' ) && in_array( 'mod_xsendfile', apache_get_modules() ) ) {
header("X-Sendfile: $file_path");
exit;
} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'lighttpd' ) ) {
header( "X-Lighttpd-Sendfile: $file_path" );
exit;
} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'nginx' ) || stristr( getenv( 'SERVER_SOFTWARE' ), 'cherokee' ) ) {
header( "X-Accel-Redirect: /$file_path" );
exit;
}
}
if ( $remote_file ) {
self::readfile_chunked( $file_path ) || header( 'Location: ' . $file_path );
} else {
self::readfile_chunked( $file_path ) || wp_die( __( 'File not found', 'woocommerce' ) . ' <a href="' . esc_url( home_url() ) . '" class="wc-forward">' . __( 'Go to homepage', 'woocommerce' ) . '</a>', '', array( 'response' => 404 ) );
}
exit;
}
/**
* readfile_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
* @param bool $retbytes return bytes of file
* @return bool|int
* @todo Meaning of the return value? Last return is status of fclose?
*/
public static function readfile_chunked( $file, $retbytes = true ) {
$chunksize = 1 * ( 1024 * 1024 );
$buffer = '';
$cnt = 0;
if ( file_exists( $file ) ) {
$handle = fopen( $file, 'r' );
if ( $handle === FALSE ) {
return FALSE;
}
} elseif ( version_compare( PHP_VERSION, '5.4.0', '<' ) && ini_get( 'safe_mode' ) ) {
$handle = @fopen( $file, 'r' );
if ( $handle === FALSE ) {
return FALSE;
}
} else {
return FALSE;
}
while ( ! feof( $handle ) ) {
$buffer = fread( $handle, $chunksize );
echo $buffer;
if ( ob_get_length() ) {
ob_flush();
flush();
}
if ( $retbytes ) {
$cnt += strlen( $buffer );
}
}
$status = fclose( $handle );
if ( $retbytes && $status ) {
return $cnt;
}
return $status;
}
}
WC_Download_Handler::init();
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