Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manual do Utilizador descarregar pdf (Página 69)

Chapter 9. Delegated control

Applying a specialised set of commands just to a subdirectory of a web site from the

httpd.conf ﬁle.

Include

Splitting the main conﬁguration ﬁle into components.

AccessFileName

Nominating a ﬁlename to handle control from the directory itself.

AddDescription

A commonly used command in the delegated conﬁguration ﬁles to set the Descrip-

tion column in automatic indexes.

AllowOverride

Controlling what can be delegated

The user directory example was the ﬁrst where we were passing control outside our

tidy document root. It may well be that we want a different conﬁguration for these,

relatively uncontrolled, areas.

There are a number of aspects to this. You must decide what defaults you want

passed to these areas and what you want absolutely ﬁxed. You also need to know

how to override the defaults where permitted.

We will start by noting how to change settings from within the httpd.conf ﬁle for

a directory tree. In our current conﬁguration ﬁle the directory index ﬁle name is

index.html. Suppose for a subdirectory of one of our web sites we wanted to change

it to be main.html. How would we do that?

ServerName cheese.dept.cam.ac.uk

DocumentRoot /var/www/CHEESE

CustomLog logs/cheese_log clr

DirectoryIndex main.html index.html

</Directory>

</VirtualHost>

Figure 9-1. httpd.conf: Using the <Directory> command

The <Directory dir> ... </Directory> identiﬁes a series of commands which

should override or enhance the general settings for a speciﬁc subdirectory,

/var/www/CHEESE/bestiary in the example given in the ﬁgure.

In the case of commands we have met, it is easy to imagine simply issuing them again

within a <Directory> block to override the previous settings. But what about turning

features on or off? A common example is to turn on or off the automatic generation

of indexes.

At the moment we can see the index of the games directory in the

cheese.dept.cam.ac.uk web site.

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Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manual do Utilizador Página 69