# Module mod_dir

This module provides for "trailing slash" redirects and serving directory index files.

Status: Base
Source File: mod_dir.c
Module Identifier: dir_module

## Summary

The index of a directory can come from one of two sources:

- A file written by the user, typically called `index.html`. The DirectoryIndex directive sets the name of this file. This is controlled by `mod_dir`.
- Otherwise, a listing generated by the server. This is provided by `mod_autoindex`.

The two functions are separated so that you can completely remove (or replace) automatic index generation should you want to.

A "trailing slash" redirect is issued when the server receives a request for a URL `http://servername/foo/dirname` where `dirname` is a directory. Directories require a trailing slash, so `mod_dir` issues a redirect to `http://servername/foo/dirname/`.

## Directives

- DirectoryIndex

## DirectoryIndex directive

Syntax: DirectoryIndex local-url [local-url] ...
Default: `DirectoryIndex index.html`
Context: server config, virtual host, directory, .htaccess
Override: Indexes
Status: Base
Module: mod_dir

Current documentation for this directive may be found here

The DirectoryIndex directive sets the list of resources to look for, when the client requests an index of the directory by specifying a / at the end of the a directory name. Local-url is the (%-encoded) URL of a document on the server relative to the requested directory; it is usually the name of a file in the directory. Several URLs may be given, in which case the server will return the first one that it finds. If none of the resources exist and the `Indexes` option is set, the server will generate its own listing of the directory.

Example:

> `DirectoryIndex index.html`

then a request for `http://myserver/docs/` would return `http://myserver/docs/index.html` if it exists, or would list the directory if it did not.

Note that the documents do not need to be relative to the directory;

> `DirectoryIndex index.html index.txt /cgi-bin/index.pl`

would cause the CGI script `/cgi-bin/index.pl` to be executed if neither `index.html` or `index.txt` existed in a directory.