Red Hat DIRECTORY SERVER 2.0 - GATEWAY Uživatelský manuál stáhnout pdf (Strana 29)

Chapter 4. Supporting MIME types

Loading and using the MIME module

Modules:

All the various elements of web server functionality are split out into modules. These

are shared libraries that the web server loads when instructed to by its conﬁguration

ﬁle. In turn, the presence of a module causes new commands to be available in the

conﬁguration ﬁle corresponding to the newly available functionality.

We start by adding the line to the conﬁguration ﬁle that loads the module.

LoadModule mime_module modules/mod_mime.so

TypesConfig /etc/mime.types

Figure 4-5. httpd.conf: Loading the MIME module

The LoadModule command takes two arguments. The second is the ﬁlename of the

shared library that it needs. Note that the pathname of the module is given relative to

the /etc/httpd directory. The ﬁrst argument is the name of the module within that

ﬁle.

Normally you would consult the documentation to determine what a module’s name

is but there is a ﬁlthy hack you can often use to determine it automatically.

$ nm /etc/httpd/modules/mod_mime.so | grep --word D

000031e0 D mime_module

Figure 4-6. Getting module names from shared libraries

Don’t worry about what the line means in detail. If you really want to know then

read the ﬁne manual page for nm. The third element in the answer is the module

name.

A list of all the common modules, together with their library ﬁle names, module

names and brief descriptions is given in Appendix A at the end of these notes.

The TypesConﬁg command indicates the ﬁle that has the correspondences between

ﬁle name sufﬁxes and MIME content types.

So how does our web server work now? The pages are now presented as HTML.

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Red Hat DIRECTORY SERVER 2.0 - GATEWAY Uživatelský manuál Strana 29