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 ( 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' );
// Note support for range requests.
header( 'Accept-Ranges: bytes' );
// 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;
}
// Support for byte-range requests
// Safari requires this and will not play mp4 files (and possibly others)
// without it.
if ( ! empty( $_SERVER['HTTP_RANGE'] ) && preg_match('/^bytes=(\d+)-(\d+)$/i', $_SERVER['HTTP_RANGE'], $m ) ) {
$byte_start = (int) $m[1];
$byte_end = (int) $m[2];
if ( filesize( $file ) - 1 < $byte_end || $byte_end < $byte_start ) {
status_header( 416 );
die( '416 — Request Range Not Satisfiable.' );
}
status_header( 206 );
header( 'Content-Range: bytes ' . $byte_start . '-' . $byte_end . '/' . filesize( $file ) );
header( 'Content-Length: ' . ($byte_end - $byte_start + 1) );
// Stream the file in 1kb chunks to avoid overloading PHP memory usage for large files.
$handle = fopen( $file, "r" );
fseek( $handle, $byte_start );
$chunk_position = $byte_start;
while ( $chunk_position <= $byte_end && !feof($handle) ) {
$chunk_length = min( 1024, $byte_end - $chunk_position + 1 );
print fread( $handle, $chunk_length );
$chunk_position += 1024;
flush();
}
fclose( $handle );
flush();
exit;
}
// If we made it this far, just serve the file.
readfile( $file );
flush();