Provided by: libapache-admin-config-perl_0.94-1.1_all 
NAME
Apache::Admin::Config - A module to read/write Apache like configuration files
SYNOPSIS
use Apache::Admin::Config;
# Parse an apache configuration file
my $conf = new Apache::Admin::Config "/path/to/config_file.conf"
or die $Apache::Admin::Config::ERROR;
my $directive = $conf->directive('documentroot');
print $directive->name; # "documentroot"
print $directive->value; # "/my/document/root"
print $directive->type; # "directive"
$directive->isin($conf); # true
$directive->delete;
# print the directive list
foreach($conf->directive())
{
print $_->name, "\n";
}
# print the virtualhost list
print $_->section('servername')->value(), "\n"
foreach $conf->section(-name => "virtualhost");
# add a directive in all virtualhosts
foreach($conf->section(-name => "virtualhost"))
{
$_->add_directive(php_admin_value => 'open_basedir "/path"');
}
# Deleting all "AddType" directives
$_->delete for $conf->directive("AddType");
# saving changes in place
$conf->save;
DESCRIPTION
"Apache::Admin::Config" provides an object oriented interface for reading and writing
Apache-like configuration files without affecting comments, indentation, or truncated
lines.
You can easily extract informations from the apache configuration, or manage htaccess
files.
I wrote this class because I work for an IPP, and we often manipulate apache configuration
files for adding new clients, activate some features or un/locking directories using
htaccess, etc. It can also be useful for writing some one-shoot migrations scripts in few
lines.
METHODES
new
$obj = new Apache::Admin::Config [/path/to/file|handle],
[-indent => $integer], ['-create'], ['-no-comment-grouping'],
['-no-blank-grouping']
Create or read, if given in argument, an apache like configuration file, and return an
Apache::Admin::Config instence.
Arguments:
"/path/to/file"
Path to the configuration file to parse. If none given, create a new one.
"handle"
Instead of specify a path to a file, you can give a reference to an handle that point
to an already openned file. You can do this like this :
my $obj = new Apache::Admin::Config (\*MYHANDLE);
-indent => $integer
If greater than 0, activates the indentation on added lines, the integer tell how many
spaces you went per level of indentation (suggest 4). A negative value means padding
with tabulation(s).
-create
If present and path to an unexisting file is given, don't return an error.
-no-comment-grouping
When there are several successive comment-lines, if comment grouping is enabled only
one comment item is created.
If present, disable comment grouping at parsing time. Enabled by default.
-no-blank-grouping
Same as comment grouping but for blank lines.
save
$obj->save(['/path/to/file'|HANDLE], ['-reformat'])
Write modifications to the configuration file. If a path to a file is given, save the
modification to this file instead. You also can give a reference to a filehandle like this
:
$conf->save(\*MYHANDLE) or die($conf->error());
Note: If you invoke save() on an object instantiated with a filehandle, you should emptied
it before. Keep in mind that the constructor don't seek the FH to the begin neither before
nor after reading it.
dump_raw
$obj->dump_raw
Returns the configuration file as same as it will be if it was saved in a file with the
save() method. If you don't call this method from the top level section, it returns the
part of the configuration file that is under the object's context.
dump_reformat
$obj->dump_raw
Same as dump_raw(), but reformat each line. Usefull used with -indent constructor
parameter.
select
@result = $obj->select
(
[-type => $type],
[-name => $name],
[-value => $value],
[-which => $index],
);
@directives = $obj->select('directive');
@sections_foo = $obj->select('section', 'Foo');
This method search in the current context for items (directives, sections, comments...)
that correspond to a properties given by arguments. It returns a list of matched nods.
This method can only be called on an object of type "section". This method search only for
elements in the section pointed by object, and isn't recursive. So elements in sub-
sections of current section aren's seek (it's not a bug).
Arguments:
"type"
Selects item(s) of "type" type.
"name"
Selects item(s) with "name" name.
"value"
Selects item(s) with "value" value.
"which"
Instead of returning a list of items, returns only a single one pointed by index given
to the -which option. Caution, returns an empty string if none selected, so don't
cascade your methodes calls like $obj->select(-which=>0)->name. Index starts at 0.
Method returns a list of item(s) founds. Each items is an Apache::Admin::Config object
with same methods but pointing to a different part of the tree.
directive
@directives = $obj->directive(args...)
Same as calling select('directive', args...)
section
@sections = $obj->section(args...)
Same as calling select('section', args...)
comment
@comments = $obj->comment(args...)
Same as calling select('comment', args...)
blank
@blanks = $obj->blank(args...)
Same as calling select('blank', args...)
set_write_directive
$conf->set_write_directive($code);
Replace the directive writing engine by you own code. Code is call for adding new
directives, or when you tell Apache::Admin::Config to reformat the whole configuration
file. See save() and dump_reformat() methods for more details.
Your handler receives 3 arguments : $self, $name and $value. You can call the "indent()"
method to get the number of spaces to put before the current line (see indent() methods
for more details)
$conf->set_write_directive(sub
{
my($self, $name, $value) = @_;
return $self->indent . "$name $value\n";
}
set_write_section
$conf->set_write_section($code);
Same as set_write_directive() but for section.
Your handler receives 3 arguments: $self, $name and $value. You can call the "indent()"
method to get the number of spaces to put before the current line (see indent() methods
for more details)
$conf->set_write_section(sub
{
my($self, $name, $value) = @_;
return $self->indent . "<$name $value>\n";
}
set_write_section_closing
$conf->set_write_section_closing($code);
Same as set_write_directive() but for end of sections.
Your handler receives 2 arguments: $self and $name. You can call the "indent()" method to
get the number of spaces to put before the current line (see indent() methods for more
details)
$conf->set_write_section_closing(sub
{
my($self, $name) = @_;
return $self->indent . "</$name>\n";
}
set_write_comment
$conf->set_write_comment($code);
Same as set_write_directive() but for comments.
Your handler receives 2 arguments: $self and $value. You can call the "indent()" method to
get the number of spaces to put before the current line (see indent() methods for more
details)
$conf->set_write_comment(sub
{
my($self, $value) = @_;
# handle comment grouping
$value =~ s/\n/\n# /g;
return $self->indent . join('#', split(/\n/, $value));
}
set_write_blank
$conf->set_write_blank($code);
Same as set_write_directive() but for blank lines.
Your handler receives 2 arguments: $self and $number.
$conf->set_write_blank(sub
{
my($self, $number) = @_;
return $number x "\n";
}
add
$item = $obj->add
(
$type|$item, [$name], [$value],
[-before => $target | -after => $target | '-ontop' | '-onbottom']
);
$item = $obj->add('section', foo => 'bar', -after => $conf_item_object);
$item = $obj->add('comment', 'a simple comment', '-ontop');
Add a line of type $type with name foo and value bar in the context pointed by $object.
Aguments:
"type"
Type of object to add (directive, section, comment or blank).
"name"
Only relevant for directives and sections.
"value"
For directive and section, it defines the value, for comments it defined the text.
"-before" => target
Inserts item one line before target. target _have_ to be in the same context
"-after" => target
Inserts item one line after target. target _have_ to be in the same context
"-ontop"
Insert item on the fist line of current context;
"-onbottom"
Iinsert item on the last line of current context;
Returns the added item
add_section
$section = $obj->add_section($name, $value)
Same as calling add('section', $name, $value)
add_directive
$directive = $obj->add_directive($name, $value)
Same as calling add('directive', $name, $value)
add_comment
$comment = $obj->add_comment("string", [$group])
Same as calling add('comment', 'string', )
$group is a boolean value that control grouping of consecutive comment lines. Disabled by
default.
add_blank
$blank = $obj->add_blank([$group])
Same as calling add('blank')
$group is a boolean value that control grouping of consecutive blank lines. Enabled by
default.
set_value
$obj->set_value($newvalue)
Change the value of a directive or section. If no argument given, return the value.
value
Returns the value of item pointed by the object if any.
(Actually "value" and "set_value" are the same method)
move
$obj->move
(
$dest_section,
-before => target |
-after => $target |
'-ontop' |
'-onbottom'
)
Move item into given section. See "add()" method for options description.
copy
$item->copy
(
$dest_section,
-before => target |
-after => $target |
'-ontop' |
'-onbottom'
)
Copy item into given section. See "add()" method for options description.
clone
$clone = $item->clone();
Clone item and all its children. Returns the cloned item.
first_line
last_line
count_lines
isin
$boolean = $obj->($section_obj, ['-recursif'])
Returns true if object point to a rule that is in the section represented by $section_obj.
If "-recursif" option is present, true is also return if object is a sub-section of
target.
<section target>
<sub section>
directive test
</sub>
</section>
$test_directive->isin($target_section) => return false
$test_directive->isin($sub_section) => return true
$test_directive->isin($target_section, '-recursif') => return true
$target_section->isin($target_section) => return true
name
Returns the name of the current pointed object if any
parent
Returns the parent context of object. This method on the top level object returns "undef".
type
Returns the type of object.
remove
Synonym for unlink (deprecated). See unlink().
unlink
$boolean = $item->unlink();
Unlinks item from the tree, resulting in two separate trees. The item to unlink becomes
the root of a new tree.
destroy
$boolean = $item->destroy();
Destroy item and its children. Caution, you should call delete() method instead if you
want destroy a part of a tree. This method don't notice item's parents of its death.
delete
$booleen = $item->delete;
Remove the current item from it's parent children list and destroy it and all its children
(remove() + destroy()).
error
Return the last appended error.
EXAMPLES
#
# Reindent configuration file properly
#
my $conf = Apache::Admin::Config
(
'/etc/apache/httpd.conf',
-indent => 2
);
$conf->save('-reformat');
#
# Managing virtual-hosts:
#
my $conf = new Apache::Admin::Config "/etc/apache/httpd.conf";
# adding a new virtual-host:
my $vhost = $conf->add_section(VirtualHost=>'127.0.0.1');
$vhost->add_directive(ServerAdmin=>'webmaster@localhost.localdomain');
$vhost->add_directive(DocumentRoot=>'/usr/share/www');
$vhost->add_directive(ServerName=>'www.localhost.localdomain');
$vhost->add_directive(ErrorLog=>'/var/log/apache/www-error.log');
my $location = $vhost->add_section(Location=>'/admin');
$location->add_directive(AuthType=>'basic');
$location->add_directive(Require=>'group admin');
$conf->save;
# selecting a virtual-host:
my $vhost;
foreach my $vh (@{$conf->section('VirtualHost')})
{
if($vh->directive('ServerName')->value eq 'www.localhost.localdomain')
{
$vhost = $vh;
last;
}
}
#
# Suppress all comments in the file
#
sub delete_comments
{
foreach(shift->comment)
{
$_->delete;
}
}
sub delete_all_comments
{
foreach($_[0]->section)
{
delete_all_comments($_);
}
delete_comments($_[0]);
}
delete_all_comments($conf);
#
# Transform configuration file into XML format
#
my $c = new Apache::Admin::Config "/path/to/file", -indent => 2
or die $Apache::Admin::Config::ERROR;
$c->set_write_directive(sub {
my($self, $name, $value) = @_;
return($self->indent.qq(<directive name="$name" value="$value />\n));
});
$c->set_write_section(sub {
my($self, $name, $value) = @_;
return($self->indent.qq(<section name="$name" value="$value">\n));
});
$c->set_write_section_closing(sub {
my($self, $name) = @_;
return($self->indent."</section>\n");
});
$c->set_write_comment(sub {
my($self, $value) = @_;
$value =~ s/\n//g;
return($self->indent."<!-- $value -->");
});
print $c->dump_reformat();
AUTHOR
Olivier Poitrey <rs@rhapsodyk.net>
AVAILABILITY
The official FTP location is:
ftp://ftp.rhapsodyk.net/pub/devel/perl/Apache-Admin-Config-current.tar.gz
Also available on CPAN.
anonymous CVS repository:
CVS_RSH=ssh cvs -d anonymous@cvs.rhapsodyk.net:/devel co Apache-Admin-Config
(supply an empty string as password)
CVS repository on the web:
http://www.rhapsodyk.net/cgi-bin/cvsweb/Apache-Admin-Config/
BUGS
Please send bug-reports to aac@list.rhapsodyk.net. You can subscribe to the list by
sending an empty mail to aac-subscribe@list.rhapsodyk.net.
LICENCE
This library is free software; you can redistribute it and/or modify it under the terms of
the GNU Lesser General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this
library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
COPYRIGHT
Copyright (C) 2001 - Olivier Poitrey