Created
June 7, 2018 05:23
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<?php | |
require_once('wp-load.php'); | |
list($basedir) = array_values(array_intersect_key(wp_upload_dir(), array('basedir' => 1)))+array(NULL); | |
$file = rtrim($basedir,'/').'/'.str_replace('..', '', isset($_GET[ 'file' ])?$_GET[ 'file' ]:''); | |
$mime = wp_check_filetype($file); | |
$ext = $mime['ext']; | |
$allowed_ext = array( 'jpg', 'jpeg', 'png', 'gif', 'svg' ); | |
if ( ! is_user_logged_in() && ! in_array( $ext, $allowed_ext ) ) { | |
//wp_redirect( wp_login_url(), 302 ); | |
auth_redirect(); | |
// exit; | |
} | |
if (!$basedir || !is_file($file)) { | |
status_header(404); | |
die('404 — File not found.'); | |
} | |
if( false === $mime[ 'type' ] && function_exists( 'mime_content_type' ) ) | |
$mime[ 'type' ] = mime_content_type( $file ); | |
if( $mime[ 'type' ] ) | |
$mimetype = $mime[ 'type' ]; | |
else | |
$mimetype = 'image/' . substr( $file, strrpos( $file, '.' ) + 1 ); | |
header( 'Content-Type: ' . $mimetype ); // always send this | |
if ( false === strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) ) | |
header( 'Content-Length: ' . filesize( $file ) ); | |
$last_modified = gmdate( 'D, d M Y H:i:s', filemtime( $file ) ); | |
$etag = '"' . md5( $last_modified ) . '"'; | |
header( "Last-Modified: $last_modified GMT" ); | |
header( 'ETag: ' . $etag ); | |
header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + 100000000 ) . ' GMT' ); | |
// Support for Conditional GET | |
$client_etag = isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ? stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) : false; | |
if( ! isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) | |
$_SERVER['HTTP_IF_MODIFIED_SINCE'] = false; | |
$client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ); | |
// If string is empty, return 0. If not, attempt to parse into a timestamp | |
$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0; | |
// Make a timestamp for our most recent modification... | |
$modified_timestamp = strtotime($last_modified); | |
if ( ( $client_last_modified && $client_etag ) | |
? ( ( $client_modified_timestamp >= $modified_timestamp) && ( $client_etag == $etag ) ) | |
: ( ( $client_modified_timestamp >= $modified_timestamp) || ( $client_etag == $etag ) ) | |
) { | |
status_header( 304 ); | |
exit; | |
} | |
// If we made it this far, just serve the file | |
readfile( $file ); |
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