Viewing file:  ms-files.php (2.56 KB) -rw-r--r--
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<?php
/**
* Multisite upload handler.
*
* @since 3.0.0
*
* @package WordPress
* @subpackage Multisite
*/
define( 'SHORTINIT', true );
require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' );
if ( !is_multisite() )
die( 'Multisite support not enabled' );
ms_file_constants();
error_reporting( 0 );
if ( $current_blog->archived == '1' || $current_blog->spam == '1' || $current_blog->deleted == '1' ) {
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 ( false === strpos( $_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;
}
$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 - use stripslashes to avoid formatting.php dependency
$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 );
flush();
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