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# Copyright (c) 2002-2004 Graham Barr. All rights reserved. This program is
# free software; you can redistribute it and/or modify it under the same
# terms as Perl itself.
package Net::LDAP::DSML;
use strict;
use vars qw(@ISA $VERSION);
use Carp;
use XML::SAX::Base;
use Net::LDAP::Entry;
@ISA = qw(XML::SAX::Base);
$VERSION = "0.12";
# OO purists will hate this :)
my %schema_typemap = qw(
attribute-type at
objectclass-type oc
);
# syn
# mr
# mru
# dts
# dtc
# nfm
sub new {
my $pkg = shift;
my %opt = @_;
my $sax;
if ($sax = $opt{output}) {
unless (ref($sax) and eval { $sax->isa('XML::SAX::Base') }) {
require XML::SAX::Writer;
$sax = XML::SAX::Writer->new( Output => $sax );
}
$sax = Net::LDAP::DSML::pp->new( handler => $sax )
if $opt{pretty_print};
}
else {
$sax = Net::LDAP::DSML::output->new;
}
bless { @_, handler => $sax }, $pkg;
}
sub start_document {
my ($self, $data) = @_;
$self->{reader} = {};
}
my %start_jumptable = qw(
entry entry
attr entry_attr
objectclass entry_attr
value entry_value
oc-value entry_value
directory-schema schema
attribute-type schema_element
objectclass-type schema_element
name schema_name
object-identifier schema_value
syntax schema_syntax
description schema_value
equality schema_value
substring schema_value
ordering schema_value
attribute schema_attr
);
sub start_element {
my ($self, $data) = @_;
(my $tag = lc $data->{Name}) =~ s/^dsml://;
my $label = $start_jumptable{$tag} or return;
my $state = $self->{reader};
goto $label;
entry:
{
$state->{entry} = { objectName => $data->{Attributes}{'{}dn'}{Value} };
return;
}
entry_attr:
{
my $name = $tag eq 'objectclass' ? $tag : lc $data->{Attributes}{'{}name'}{Value};
$state->{attr} = $state->{attrs}{$name}
||= do {
my $aref = [];
push @{$state->{entry}{attributes}}, {
type => $data->{Attributes}{'{}name'}{Value},
vals => $aref
};
$aref;
};
return;
}
entry_value:
{
push @{$state->{attr}}, '';
$state->{value} = \${$state->{attr}}[-1];
$state->{encoding} = $data->{Attributes}{'{}encoding'}{Value} || '';
return;
}
schema:
{
$state->{schema} = {};
return;
}
schema_element:
{
my $Attrs = $data->{Attributes};
my $id = $Attrs->{'{}id'}{Value};
my $elem = $state->{elem} = { type => $schema_typemap{$tag} };
$state->{id}{$id} = $elem if $id;
my $value;
if (defined($value = $Attrs->{"{}type"}{Value})) {
$elem->{lc $value} = 1;
}
foreach my $attr (qw(
single-value
obsolete
user-modification
)) {
my $value = $Attrs->{"{}$attr"}{Value};
$elem->{$attr} = 1 if defined $value and $value =~ /^true$/i;
}
$elem->{superior} = $value
if defined($value = $Attrs->{"{}superior"}{Value});
return;
}
schema_name:
{
my $elem = $state->{elem};
push @{$elem->{name}}, '';
$state->{value} = \${$elem->{name}}[-1];
return;
}
schema_syntax:
{
my $elem = $state->{elem};
my $bound = $data->{Attributes}{'{}bound'}{Value};
$elem->{max_length} = $bound if defined $bound;
$elem->{$tag} = '' unless exists $elem->{$tag};
$state->{value} = \$elem->{$tag};
return;
}
schema_value:
{
my $elem = $state->{elem};
$elem->{$tag} = '' unless exists $elem->{$tag};
$state->{value} = \$elem->{$tag};
return;
}
schema_attr:
{
my $Attrs = $data->{Attributes};
my $required = $data->{Attributes}{'{}required'}{Value} || 'false';
my $ref = $data->{Attributes}{'{}ref'}{Value} or return;
my $type = $required =~ /^false$/i ? 'may' : 'must';
push @{$state->{elem}{$type}}, $ref;
return;
}
}
my %end_jumptable = qw(
entry entry
attr entry_attr
objectclass entry_attr
value value
oc-value value
syntax value
description value
equality value
substring value
ordering value
name value
object-identifier value
attribute-type schema_element
objectclass-type schema_element
directory-schema schema
);
sub end_element {
my ($self, $data) = @_;
(my $tag = lc $data->{Name}) =~ s/^dsml://;
my $label = $end_jumptable{$tag} or return;
my $state = $self->{reader};
goto $label;
entry:
{
my $entry = Net::LDAP::Entry->new;
$entry->{asn} = delete $state->{entry};
if (my $handler = $self->{entry}) {
$handler->($entry);
}
else {
push @{$state->{entries}}, $entry;
}
return;
}
entry_attr:
{
delete $state->{attr};
return;
}
value:
{
delete $state->{value};
delete $state->{encoding};
return;
}
schema_element:
{
my $elem = delete $state->{elem};
my $oid = $elem->{oid};
my $name;
if (my $aliases = $elem->{name}) {
$name = $elem->{name} = shift @$aliases;
$elem->{aliases} = $aliases if @$aliases;
}
elsif ($oid) {
$name = $oid;
}
else {
croak "Schema element without a name or object-identifier";
}
$elem->{oid} ||= $name;
$state->{schema}{oid}{$oid} = $state->{schema}{$elem->{type}}{lc $name} = $elem;
return;
}
schema:
{
my $id = $state->{id};
my $schema = $state->{schema};
foreach my $elem (values %{$schema->{oc}}) {
if (my $sup = $elem->{superior}) {
$sup =~ /#(.*)|(.*)/;
if (my $ref = $id->{$+}) {
$elem->{superior} = $ref->{name};
}
else {
$elem->{superior} = $+;
}
}
foreach my $mm (qw(must may)) {
if (my $mmref = $elem->{$mm}) {
my @mm = map {
/#(.*)|(.*)/;
my $ref = $id->{$+};
$ref ? $ref->{name} : $+;
} @$mmref;
$elem->{$mm} = \@mm;
}
}
}
require Net::LDAP::Schema;
bless $schema, 'Net::LDAP::Schema'; # Naughty :-)
if (my $handler = $self->{schema}) {
$handler->($schema);
}
return;
}
}
sub characters {
my ($self, $data) = @_;
my $state = $self->{reader};
if (my $sref = $state->{value}) {
$$sref = ($state->{encoding}||'') eq 'base64'
? do { require MIME::Base64; MIME::Base64::decode_base64($data->{Data}) }
: $data->{Data};
}
}
sub _dsml_context {
my ($self, $new) = @_;
my $context = $self->{writer}{context};
my $handler = $self->{handler};
unless ($context) {
$context = $self->{writer}{context} = [];
$handler->start_document;
$handler->xml_decl({
Standalone => '',
Version => '1.0',
Encoding => 'utf-8'
});
}
while (@$context and ($context->[-1] ne 'dsml' or $new eq '')) {
my $old = pop @$context;
$handler->end_element({
Name => "dsml:$old",
LocalName => $old,
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml'
});
$handler->end_prefix_mapping({
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml'
}) if $old eq 'dsml';
}
if (!$new) {
$handler->end_document;
delete $self->{writer}{context};
}
elsif (!@$context or $context->[-1] ne $new) {
$self->_dsml_context('dsml') unless $new eq 'dsml' or @$context;
push @$context, $new;
my %data = (
Name => "dsml:$new",
LocalName => $new,
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml',
);
if ($new eq 'dsml') {
$handler->start_prefix_mapping({
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml'
});
$data{Attributes} = {
'{http://www.w3.org/2000/xmlns/}dsml' => {
Name => 'xmlns:dsml',
LocalName => 'dsml',
NamespaceURI => 'http://www.w3.org/2000/xmlns/',
Value => 'http://www.dsml.org/DSML',
Prefix => 'xmlns'
}
};
}
$handler->start_element(\%data);
}
}
sub start_dsml {
my $self = shift;
$self->_dsml_context('') if $self->{writer}{context};
$self->_dsml_context('dsml');
}
sub end_dsml {
my $self = shift;
$self->_dsml_context('') if $self->{writer} and $self->{writer}{context};
}
sub write_entry {
my $self = shift;
my $handler = $self->{handler};
$self->_dsml_context('directory-entries');
my %attr;
my %data = (
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml',
Attributes => \%attr,
);
foreach my $entry (@_) {
my $asn = $entry->asn;
@data{qw(Name LocalName)} = qw(dsml:entry entry);
%attr = ( '{}dn' => { Value => $asn->{objectName}, Name => "dn"} );
$handler->start_element(\%data);
foreach my $attr ( @{$asn->{attributes}} ) {
my $name = $attr->{type};
my $is_oc = lc($name) eq "objectclass";
if ($is_oc) {
@data{qw(Name LocalName)} = qw(dsml:objectclass objectclass);
%attr = ();
$handler->start_element(\%data);
@data{qw(Name LocalName)} = qw(dsml:oc-value oc-value);
}
else {
@data{qw(Name LocalName)} = qw(dsml:attr attr);
%attr = ( "{}name" => { Value => $name, Name => "name" } );
$handler->start_element(\%data);
@data{qw(Name LocalName)} = qw(dsml:value value);
}
my %chdata;
foreach my $val (@{$attr->{vals}}) {
if ($val =~ /(^[ :]|[\x00-\x1f\x7f-\xff])/) {
require MIME::Base64;
$chdata{Data} = MIME::Base64::encode($val,"");
%attr = ( '{}encoding' => { Value => 'base64', Name => "encoding"} );
}
else {
$chdata{Data} = $val;
%attr = ();
}
$handler->start_element(\%data);
$handler->characters(\%chdata);
%attr = ();
$handler->end_element(\%data);
}
@data{qw(Name LocalName)} = $is_oc
? qw(dsml:objectclass objectclass)
: qw(dsml:attr attr);
%attr = ();
$handler->end_element(\%data);
}
@data{qw(Name LocalName)} = qw(dsml:entry entry);
%attr = ();
$handler->end_element(\%data);
}
}
sub write_schema {
my ($self, $schema) = @_;
my $handler = $self->{handler};
$self->_dsml_context('dsml');
my %attr;
my %data = (
NamespaceURI => 'http://www.dsml.org/DSML',
Prefix => 'dsml',
Attributes => \%attr,
);
@data{qw(Name LocalName)} = qw(dsml:directory-schema directory-schema);
$handler->start_element(\%data);
my %id;
foreach my $attr ($schema->all_attributes) {
$id{$attr->{name}} = 1;
%attr = ( '{}id' => { Value => "#$attr->{name}", Name => 'id'});
if (my $sup = $attr->{superior}) {
my $sup_a = $schema->attribute($sup);
$attr{"{}superior"} = {
Value => "#" . ($sup_a ? $sup_a->{name} : $sup),
Name => 'superior'
};
}
foreach my $flag (qw(obsolete single-value)) {
$attr{"{}$flag"} = {
Value => 'true', Name => $flag
} if $attr->{$flag};
}
$attr{"{}user-modification"} = {
Value => 'false',
Name => 'user-modification',
} unless $attr->{'user-modification'};
@data{qw(Name LocalName)} = qw(dsml:attribute-type attribute-type);
$handler->start_element(\%data);
%attr = ();
unless (($attr->{name} || '') eq ($attr->{oid} || '')) {
@data{qw(Name LocalName)} = qw(dsml:name name);
$handler->start_element(\%data);
$handler->characters({Data => $attr->{name}});
$handler->end_element(\%data);
}
if (my $aliases = $attr->{aliases}) {
@data{qw(Name LocalName)} = qw(dsml:name name);
foreach my $name (@$aliases) {
$handler->start_element(\%data);
$handler->characters({Data => $name});
$handler->end_element(\%data);
}
}
if (my $oid = $attr->{oid}) {
@data{qw(Name LocalName)} = ("dsml:object-identifier","object-identifier");
$handler->start_element(\%data);
$handler->characters({Data => $oid});
$handler->end_element(\%data);
}
foreach my $elem (qw(
description
equality
ordering
substring
)) {
defined(my $text = $attr->{$elem}) or next;
@data{qw(Name LocalName)} = ("dsml:$elem",$elem);
$handler->start_element(\%data);
$handler->characters({Data => $text});
$handler->end_element(\%data);
}
if (my $syn = $attr->{syntax}) {
if (defined(my $bound = $attr->{max_length})) {
$attr{'{}bound'} = {
Value => $bound,
Name => 'bound',
};
}
@data{qw(Name LocalName)} = qw(dsml:syntax syntax);
$handler->start_element(\%data);
$handler->characters({Data => $syn});
$handler->end_element(\%data);
}
@data{qw(Name LocalName)} = qw(dsml:attribute-type attribute-type);
$handler->end_element(\%data);
}
foreach my $oc ($schema->all_objectclasses) {
my $id = $oc->{name};
$id = $oc->{'object-identifier'} if $id{$id};
%attr = ( '{}id' => { Value => "#$id", Name => 'id'});
if (my $sup = $oc->{superior}) {
my $sup_a = $schema->objectclass($sup);
$attr{"{}superior"} = {
Value => "#" . ($sup_a ? $sup_a->{name} : $sup),
Name => 'superior'
};
}
if (my $type = (grep { $oc->{$_} } qw(structural abstract auxilary))[0]) {
$attr{"{}type"} = {
Value => $type,
Name => 'type',
};
}
if ($oc->{obsolete}) {
$attr{"{}type"} = {
Value => 'true',
Name => 'obsolete',
};
}
@data{qw(Name LocalName)} = qw(dsml:objectclass-type objectclass-type);
$handler->start_element(\%data);
%attr = ();
unless (($oc->{name} || '') eq ($oc->{'object-identifier'} || '')) {
@data{qw(Name LocalName)} = qw(dsml:name name);
$handler->start_element(\%data);
$handler->characters({Data => $oc->{name}});
$handler->end_element(\%data);
}
if (my $aliases = $oc->{aliases}) {
@data{qw(Name LocalName)} = qw(dsml:name name);
foreach my $name (@$aliases) {
$handler->start_element(\%data);
$handler->characters({Data => $name});
$handler->end_element(\%data);
}
}
foreach my $elem (qw(
description
object-identifier
)) {
defined(my $text = $oc->{$elem}) or next;
@data{qw(Name LocalName)} = ("dsml:$elem",$elem);
$handler->start_element(\%data);
$handler->characters({Data => $text});
$handler->end_element(\%data);
}
@data{qw(Name LocalName)} = qw(dsml:attribute attribute);
foreach my $mm (qw(must may)) {
%attr = (
'{}required' => {
Value => ($mm eq 'must' ? 'true' : 'false'),
Name => 'required'
},
'{}ref' => {
Name => 'ref'
},
);
my $mmref = $oc->{$mm} or next;
foreach my $attr (@$mmref) {
my $a_ref = $schema->attribute($attr);
$attr{'{}ref'}{Value} = $a_ref ? $a_ref->{name} : $attr;
$handler->start_element(\%data);
$handler->end_element(\%data);
}
}
@data{qw(Name LocalName)} = qw(dsml:objectclass-type objectclass-type);
$handler->end_element(\%data);
}
%attr = ();
@data{qw(Name LocalName)} = qw(dsml:directory-schema directory-schema);
$handler->end_element(\%data);
}
package Net::LDAP::DSML::pp;
sub new {
my $pkg = shift;
bless { @_ }, $pkg;
}
sub start_element {
my ($self, $data) = @_;
my $handler = $self->{handler};
$handler->start_element($data);
unless ($data->{Name} =~ /^(?:dsml:)?(?:
value
|oc-value
|name
|syntax
|equality
|substring
|object-identifier
|description
|ordering
|attribute
)$/ix
) {
$handler->ignorable_whitespace({Data => "\n"});
}
}
sub end_element {
my $self = shift;
my $handler = $self->{handler};
$handler->end_element(@_);
$handler->ignorable_whitespace({Data => "\n"});
}
sub xml_decl {
my $self = shift;
my $handler = $self->{handler};
$handler->xml_decl(@_);
$handler->ignorable_whitespace({Data => "\n"});
}
use vars qw($AUTOLOAD);
sub DESTROY {}
sub AUTOLOAD {
(my $meth = $AUTOLOAD) =~ s/^.*:://;
no strict 'refs';
*{$meth} = sub { shift->{handler}->$meth(@_) };
goto &$meth;
}
package Net::LDAP::DSML::output;
sub new { bless {} }
use vars qw($AUTOLOAD);
sub DESTROY {}
sub AUTOLOAD {
(my $meth = $AUTOLOAD) =~ s/^.*:://;
require XML::SAX::Writer;
my $self = shift;
$self->{handler} = XML::SAX::Writer->new;
bless $self, 'Net::LDAP::DSML::pp';
$self->$meth(@_);
}
1;
__END__
=head1 NAME
NET::LDAP::DSML -- A DSML Writer for Net::LDAP
=head1 SYNOPSIS
For a directory entry;
use Net::LDAP;
use Net::LDAP::DSML;
use IO::File;
my $server = "localhost";
my $file = "testdsml.xml";
my $ldap = Net::LDAP->new($server);
$ldap->bind();
#
# For file i/o
#
my $file = "testdsml.xml";
my $io = IO::File->new($file,"w") or die ("failed to open $file as filehandle.$!\n");
my $dsml = Net::LDAP::DSML->new(output => $io, pretty_print => 1 )
or die ("DSML object creation problem using an output file.\n");
# OR
#
# For file i/o
#
open (IO,">$file") or die("failed to open $file.$!");
my $dsml = Net::LDAP::DSML->new(output => *IO, pretty_print => 1)
or die ("DSML object creation problem using an output file.\n");
# OR
#
# For array usage.
# Pass a reference to an array.
#
my @data = ();
$dsml = Net::LDAP::DSML->new(output => \@data, pretty_print => 1)
or die ("DSML object cration problem using an output array.\n");
my $mesg = $ldap->search(
base => 'o=airius.com',
scope => 'sub',
filter => 'ou=accounting',
callback => sub {
my ($mesg,$entry) =@_;
$dsml->write_entry($entry)
if (ref $entry eq 'Net::LDAP::Entry');
}
);
die ("search failed with ",$mesg->code(),"\n") if $mesg->code();
For directory schema;
A file or array can be used for output, in the following example
only an array will be used.
my $schema = $ldap->schema();
my @data = ();
my $dsml = Net::LDAP::DSML->new(output => \@data, pretty_print => 1 )
or die ("DSML object creation problem using an output array.\n");
$dsml->write_schema($schema);
print "Finished printing DSML\n";
=head1 DESCRIPTION
Directory Service Markup Language (DSML) is the XML standard for
representing directory service information in XML.
At the moment this module only writes DSML entry and schema entities.
Reading DSML entities is a future project.
Eventually this module will be a full level 2 consumer and producer
enabling you to give you full DSML conformance. Currently this
module has the ability to be a level 2 producer. The user must
understand the his/her directory server will determine the
consumer and producer level they can achieve.
To determine conformance, it is useful to divide DSML documents into
four types:
1.Documents containing no directory schema nor any references to
an external schema.
2.Documents containing no directory schema but containing at
least one reference to an external schema.
3.Documents containing only a directory schema.
4.Documents containing both a directory schema and entries.
A producer of DSML must be able to produce documents of type 1.
A producer of DSML may, in addition, be able to produce documents of
types 2 thru 4.
A producer that can produce documents of type 1 is said to be a level
1 producer. A producer than can produce documents of all four types is
said to be a level 2 producer.
=head1 CALLBACKS
The module uses callbacks to improve performance (at least the appearance
of improving performance ;) and to reduce the amount of memory required to
parse large DSML files. Every time a single entry or schema is processed
we pass the Net::LDAP object (either an Entry or Schema object) to the
callback routine.
=head1 CONSTRUCTOR
new ()
Creates a new Net::LDAP::DSML object. There are 3 options
to this method.
B<Example>
my $dsml = Net::LDAP::DSML->new();
Prints xml data to standard out.
my $dsml = Net::LDAP::DSML->new(output => \@array);
my $dsml = Net::LDAP::DSML->new(output => *FILE);
Prints xml data to a file or array.
my $dsml = Net::LDAP::DSML->new(output => \@array, pretty_print => 1);
my $dsml = Net::LDAP::DSML->new(output => *FILE, pretty_print => 1);
Prints xml data to a file or array in pretty print style.
OUTPUT is a referrence to either a file handle that has already
been opened or to an array.
PRETTY_PRINT is an option to print a new line at the end of
each element sequence. It makes the reading of the XML output
easier for a human.
=head1 METHODS
=over 4
=item start_dsml( )
Start a DSML file.
= item end_dsml( )
End a DSML file.
=item write_entry( ENTRY )
Entry is a Net::LDAP::Entry object. The write method will parse
the LDAP data in the Entry object and put it into DSML XML
format.
B<Example>
my $entry = $mesg->entry();
$dsml->write_entry($entry);
=item write_schema( SCHEMA )
Schema is a Net::LDAP::Schema object. The write_schema method will
parse the LDAP data in the Schema object and put it into DSML XML
format.
B<Example>
my $schema = $ldap->schema();
$dsml->write_schema($schema);
=back
=head1 AUTHOR
Graham Barr gbarr@pobox.com
=head1 SEE ALSO
L<Net::LDAP>,
L<XML::SAX::Base>
=head1 COPYRIGHT
Copyright (c) 2002-2004 Graham Barr. All rights reserved. This program is
free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
=cut
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