diff options
Diffstat (limited to '')
-rw-r--r-- | wp-includes/ms-files.php | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/wp-includes/ms-files.php b/wp-includes/ms-files.php new file mode 100644 index 0000000..2efe452 --- /dev/null +++ b/wp-includes/ms-files.php @@ -0,0 +1,93 @@ +<?php +/** + * Multisite upload handler. + * + * @since 3.0.0 + * + * @package WordPress + * @subpackage Multisite + */ + +define( 'MS_FILES_REQUEST', true ); +define( 'SHORTINIT', true ); +require_once dirname( __DIR__ ) . '/wp-load.php'; + +if ( ! is_multisite() ) { + die( 'Multisite support not enabled' ); +} + +ms_file_constants(); + +if ( '1' === $current_blog->archived || '1' === $current_blog->spam || '1' === $current_blog->deleted ) { + status_header( 404 ); + die( '404 — File not found.' ); +} + +$file = rtrim( BLOGUPLOADDIR, '/' ) . '/' . str_replace( '..', '', $_GET['file'] ); +if ( ! is_file( $file ) ) { + status_header( 404 ); + die( '404 — File not found.' ); +} + +$mime = wp_check_filetype( $file ); +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 ( ! str_contains( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) ) { + header( 'Content-Length: ' . filesize( $file ) ); +} + +// Optional support for X-Sendfile and X-Accel-Redirect. +if ( WPMU_ACCEL_REDIRECT ) { + header( 'X-Accel-Redirect: ' . str_replace( WP_CONTENT_DIR, '', $file ) ); + exit; +} elseif ( WPMU_SENDFILE ) { + header( 'X-Sendfile: ' . $file ); + exit; +} + +$wp_last_modified = gmdate( 'D, d M Y H:i:s', filemtime( $file ) ); +$wp_etag = '"' . md5( $wp_last_modified ) . '"'; + +header( "Last-Modified: $wp_last_modified GMT" ); +header( 'ETag: ' . $wp_etag ); +header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + 100000000 ) . ' GMT' ); + +// Support for conditional GET - use stripslashes() to avoid formatting.php dependency. +if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) { + $client_etag = stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ); +} else { + $client_etag = ''; +} + +if ( isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) { + $client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ); +} else { + $client_last_modified = ''; +} + +// If string is empty, return 0. If not, attempt to parse into a timestamp. +$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0; + +// Make a timestamp for our most recent modification. +$wp_modified_timestamp = strtotime( $wp_last_modified ); + +if ( ( $client_last_modified && $client_etag ) + ? ( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag === $wp_etag ) ) + : ( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag === $wp_etag ) ) +) { + status_header( 304 ); + exit; +} + +// If we made it this far, just serve the file. +readfile( $file ); +flush(); |