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11aa9b4da5
This updates two fragments for sending a `304 Not Modified` header to better align with each other by using consistent variable names and formatting. Follow-up to [1036], [1037], [1043], [2534], [2584], [2627], [12603], [12936], [56362]. See #58831. Built from https://develop.svn.wordpress.org/trunk@56395 git-svn-id: http://core.svn.wordpress.org/trunk@55907 1a063a9b-81f0-0310-95a4-ce76da25c4cd
94 lines
2.6 KiB
PHP
94 lines
2.6 KiB
PHP
<?php
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/**
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* Multisite upload handler.
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*
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* @since 3.0.0
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*
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* @package WordPress
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* @subpackage Multisite
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*/
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define( 'MS_FILES_REQUEST', true );
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define( 'SHORTINIT', true );
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require_once dirname( __DIR__ ) . '/wp-load.php';
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if ( ! is_multisite() ) {
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die( 'Multisite support not enabled' );
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}
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ms_file_constants();
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if ( '1' == $current_blog->archived || '1' == $current_blog->spam || '1' == $current_blog->deleted ) {
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status_header( 404 );
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die( '404 — File not found.' );
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}
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$file = rtrim( BLOGUPLOADDIR, '/' ) . '/' . str_replace( '..', '', $_GET['file'] );
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if ( ! is_file( $file ) ) {
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status_header( 404 );
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die( '404 — File not found.' );
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}
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$mime = wp_check_filetype( $file );
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if ( false === $mime['type'] && function_exists( 'mime_content_type' ) ) {
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$mime['type'] = mime_content_type( $file );
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}
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if ( $mime['type'] ) {
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$mimetype = $mime['type'];
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} else {
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$mimetype = 'image/' . substr( $file, strrpos( $file, '.' ) + 1 );
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}
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header( 'Content-Type: ' . $mimetype ); // Always send this.
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if ( ! str_contains( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) ) {
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header( 'Content-Length: ' . filesize( $file ) );
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}
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// Optional support for X-Sendfile and X-Accel-Redirect.
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if ( WPMU_ACCEL_REDIRECT ) {
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header( 'X-Accel-Redirect: ' . str_replace( WP_CONTENT_DIR, '', $file ) );
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exit;
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} elseif ( WPMU_SENDFILE ) {
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header( 'X-Sendfile: ' . $file );
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exit;
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}
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$wp_last_modified = gmdate( 'D, d M Y H:i:s', filemtime( $file ) );
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$wp_etag = '"' . md5( $wp_last_modified ) . '"';
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header( "Last-Modified: $wp_last_modified GMT" );
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header( 'ETag: ' . $wp_etag );
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header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + 100000000 ) . ' GMT' );
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// Support for conditional GET - use stripslashes() to avoid formatting.php dependency.
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if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
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$client_etag = stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] );
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} else {
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$client_etag = '';
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}
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if ( isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
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$client_last_modified = trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
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} else {
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$client_last_modified = '';
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}
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// If string is empty, return 0. If not, attempt to parse into a timestamp.
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$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
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// Make a timestamp for our most recent modification.
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$wp_modified_timestamp = strtotime( $wp_last_modified );
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if ( ( $client_last_modified && $client_etag )
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? ( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag === $wp_etag ) )
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: ( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag === $wp_etag ) )
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) {
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status_header( 304 );
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exit;
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}
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// If we made it this far, just serve the file.
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readfile( $file );
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flush();
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