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Chapter 8. Users’ own web pages

userdir_module

We will introduce the relevant module and the single command it provides.

Simple use

We will start with the simplest provision of users’ personal web pages by loading the

module and using it in its simplest form.

Complex use

We will then give an example of how it can be used to redirect lookups to an entirely

different system.

The principle of this chapter is to provide your users with the ability to create their

own web pages. The web pages may be located on the servers in quesion, or on a

different server altogether. As ever, there is a module that provides the extra func-

tionality. In the example below, we provides user pages in all the virtual hosts.

LoadModule userdir_module modules/mod_userdir.so

UserDir public_html

Figure 8-1. Loading and using the module

In this example, the command UserDir public_html causes any URL of

the form http://server/~bob/path/name.html to correspond to a ﬁle

~bob/public_html/path/name.html. (In this ﬁlename the expression “~bob”

means “the home directory of user bob” and is standard Unix notation. It is this that

the URL notation is based on.

The directory name public_html is not ﬁxed and can be modiﬁed. Furthermore,

more complex mappings of username onto ﬁle name can be provided. Any instance

of “*” in the “directory name” will be replaced with the user’s ID.

If the directory name is actually a URL then, instead of the web server looking for

a local directory, it responds with an HTTP redirection, pointing the web client at a

new URL, typically on a different server.

Table 8-1. userdir_module lookups of http://server/~bob/alpha/beta.html

UserDir argument Translated path

public_html ~bob/public_html/alpha/beta.html

www ~bob/www/alpha/beta.html

/var/www/users /var/www/users/bob/alpha/beta.html

/var/www/*/web /var/www/bob/web/alpha/beta.html

http://elsewhere/users http://elsewhere/users/bob/alpha/beta.html

http://elsewhere/*/web http://elsewhere/bob/web/alpha/beta.html

http://elsewhere/~*/ http://elsewhere/~bob/alpha/beta.html

It is possible to give a sequence of targets to the UserDir command. In this case they

will be searched in turn until one provides the server with the ﬁle or directory it is

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Red Hat DIRECTORY SERVER 2.0 - GATEWAY Manuale Utente Pagina 67