bp_document_download_headers( string $file_path, string $filename, array $download_range = array() )

function bp_document_download_headers( $file_path, $filename, $download_range = array() ) {
	bp_document_check_server_config();
	bp_document_clean_buffers();
	bp_document_nocache_headers();

	header( 'X-Robots-Tag: noindex, nofollow', true );
	header( 'Content-Type: ' . bp_document_get_download_content_type( $file_path ) );
	header( 'Content-Description: File Transfer' );
	header( 'Content-Disposition: attachment; filename="' . $filename . '";' );
	header( 'Content-Transfer-Encoding: binary' );

	$file_size = @filesize( $file_path ); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
	if ( ! $file_size ) {
		return;
	}

	if ( isset( $download_range['is_range_request'] ) && true === $download_range['is_range_request'] ) {
		if ( false === $download_range['is_range_valid'] ) {
			header( 'HTTP/1.1 416 Requested Range Not Satisfiable' );
			header( 'Content-Range: bytes 0-' . ( $file_size - 1 ) . '/' . $file_size );
			exit;
		}

		$start  = $download_range['start'];
		$end    = $download_range['start'] + $download_range['length'] - 1;
		$length = $download_range['length'];

		header( 'HTTP/1.1 206 Partial Content' );
		header( "Accept-Ranges: 0-$file_size" );
		header( "Content-Range: bytes $start-$end/$file_size" );
		header( "Content-Length: $length" );
	} else {
		header( 'Content-Length: ' . $file_size );
	}
}