Import Upstream version 1.02

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su-fang 2022-09-14 14:44:12 +08:00
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Revision history for Perl extension XML::SAX.
1.02 14 Jun 2019 Grant McLean
- Spelling fixes (patch from Ville Skyttä)
- Add repo location to metadata (patches from Ville Skyttä & Martin McGrath)
- Reorganise module files under lib/XML
- Regenerate MANIFEST using 'make manifest' to include missing test files
1.00 15 Feb 2018 Grant McLean
- Add makefile dependency to fix order of build steps RT#62289 (patch from
Ed J)
0.99 05 Sep 2011 Grant McLean
- Re-release without nested XML-SAX-Base distribution, add prereq instead
(note no other changes from 0.96 release)
0.96 06 Aug 2008 Grant McLean
- Fix breakage of Unicode regexes on 5.6 (introduced in 0.95 release)
0.95 05 Aug 2008 Grant McLean
- XML::SAX::PurePerl fixes:
- RT#37147: Fix handling of numeric character entities in attribute
values (report from Jools Smyth)
- RT#19442: Fix for numeric character entities spanning end of buffer
(report from Eivind Eklund)
- RT#29316: Performance fix for parsing from large strings (patch from
Gordon Lack)
- RT#26588: Fix for UTF8 bytes in first 4096 bytes of document not being
decoded to Perl-UTF8-characters (patch from Niko Tyni of the
Debian project)
- RT#37545: incorrect operator precedence breaks single quotes around
DTD entity declarations (report from Kevin Ryde)
- RT#28477: Fix test in ParserFactory.pm for parser module loaded (report
from Douglas Wilson)
- RT#28564: Fix XML::SAX::PurePerl versioning (report from Chapman Flack)
0.16 27 Jun 2007 Grant McLean
- Applied patch for PI handling from RT#19173
0.15 08 Feb 2007 Grant McLean
- Fixed handling of entities in attribute values
- Cleaned up some benign warnings
0.14 23 Apr 2006 Matt Sergeant
- Fixed CDATA section parsing (Uwe Voelker)
- Fix Makefile.PL for VMS
- Support calling set_handler() mid-parse
- Fix for when random modules overload UNIVERSAL::AUTOLOAD()
- Fix case when ParserDetails.ini isn't being updated but we are doing an
upgrade.
0.13 24 Oct 2005 Matt Sergeant
- Complete re-write of XML::SAX::PurePerl for performance
- Support Encoding & XMLVersion in DocumentLocator interface
- A few conformance tweaks to match perl SAX 2.1.
0.12 20 Nov 2002 Matt Sergeant
- Made sure SAX.ini works as documented
- Fixed when you specify Module (version)
0.11 03 Sep 2002 Matt Sergeant
- Base: Merged in XML::SAX::Base 1.04 (including memory leak fixes)
- ParserFactory: Made it do what the docs say when you specify
a module version number.
- SAX: Fixed XML::SAX::Intro typo.
- ParserFactory: Fixed (and test) broken version in parser pkg
0.10 14 Feb 2002 Matt Sergeant
- PurePerl: Fixed PubidChar missing '-'
- ParserFactory: Allow version in parser package
0.09 06 Feb 2002 Matt Sergeant
- PurePerl: Performance enhancements
- PurePerl: Line End handling implemented.
- PurePerl: Attribute Value Normalization implemented (mostly).
- PurePerl: Fixed element copying for end_element.
0.08 30 Jan 2002 Matt Sergeant
- Fixes for perl 5.7.2
0.07 29 Jan 2002 Matt Sergeant
- Fixed higher utf8 chars to work on both 5.005 and 5.6.1
(not tested on 5.6.0 since it's a bad perl)
0.06 28 Jan 2002 Matt Sergeant
- Fixed empty ParserDetails.ini bug
- Fixed overwriting ParserDetails.ini bug
- Added ability to specify dir to ParserDetails.ini
0.05 21 Jan 2002 Matt Sergeant
- Updated PREREQ_PM in Makefile.PL
- Updated Docs
0.04 21 Jan 2002 Matt Sergeant
- More PurePerl updates and fixes
- Added DocumentLocator class
- Added remove_parser() to XML::SAX
0.03 25 Nov 2001 Matt Sergeant
- Changes lost. Mostly PurePerl parser updates
0.02 14 Nov 2001 Matt Sergeant
- Removed windows line endings so perldocs look ok.
- Fixed some docs
0.01 Mon Nov 5 22:24:06 2001 Matt Sergeant
- original version; created by elves and penguins v1.32

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XML::SAX is dual licensed under the same terms as Perl itself.
This means at your choice, either the Perl Artistic License, or
the GNU GPL version 1 or higher.
(should we include the full text here?)

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Changes
lib/XML/SAX.pm
lib/XML/SAX/DocumentLocator.pm
lib/XML/SAX/Intro.pod
lib/XML/SAX/ParserFactory.pm
lib/XML/SAX/PurePerl.pm
lib/XML/SAX/PurePerl/DebugHandler.pm
lib/XML/SAX/PurePerl/DocType.pm
lib/XML/SAX/PurePerl/DTDDecls.pm
lib/XML/SAX/PurePerl/EncodingDetect.pm
lib/XML/SAX/PurePerl/Exception.pm
lib/XML/SAX/PurePerl/NoUnicodeExt.pm
lib/XML/SAX/PurePerl/Productions.pm
lib/XML/SAX/PurePerl/Reader.pm
lib/XML/SAX/PurePerl/Reader/NoUnicodeExt.pm
lib/XML/SAX/PurePerl/Reader/Stream.pm
lib/XML/SAX/PurePerl/Reader/String.pm
lib/XML/SAX/PurePerl/Reader/UnicodeExt.pm
lib/XML/SAX/PurePerl/Reader/URI.pm
lib/XML/SAX/PurePerl/UnicodeExt.pm
lib/XML/SAX/PurePerl/XMLDecl.pm
LICENSE
Makefile.PL
MANIFEST
META.yml Module meta-data (added by MakeMaker)
README
t/00basic.t
t/01known.t
t/10xmldecl1.t
t/11xmldecl2.t
t/12miscstart.t
t/13int_ent.t
t/14encoding.t
t/15element.t
t/16large.t
t/19pi.t
t/20factory.t
t/21saxini.t
t/30parse_file.t
t/40cdata.t
t/42entities.t
t/99cleanup.t
testfiles/01.xml
testfiles/02a.xml
testfiles/02b.xml
testfiles/03a.xml
testfiles/03b.xml
testfiles/04a.xml
testfiles/06a.xml
testfiles/06b.xml
testfiles/06c.xml
testfiles/06d.xml
testfiles/06e.xml
testfiles/06f.xml
testfiles/06g.xml
testfiles/iso8859_1.xml
testfiles/iso8859_2.xml
testfiles/koi8_r.xml
testfiles/utf-16.xml
testfiles/utf-16le.xml
testfiles/xmltest.xml
META.json Module JSON meta-data (added by MakeMaker)

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{
"abstract" : "unknown",
"author" : [
"unknown"
],
"dynamic_config" : 1,
"generated_by" : "ExtUtils::MakeMaker version 7.0401, CPAN::Meta::Converter version 2.150005",
"license" : [
"unknown"
],
"meta-spec" : {
"url" : "http://search.cpan.org/perldoc?CPAN::Meta::Spec",
"version" : "2"
},
"name" : "XML-SAX",
"no_index" : {
"directory" : [
"t",
"inc"
]
},
"prereqs" : {
"build" : {
"requires" : {
"ExtUtils::MakeMaker" : "0"
}
},
"configure" : {
"requires" : {
"ExtUtils::MakeMaker" : "0"
}
},
"runtime" : {
"requires" : {
"File::Temp" : "0",
"XML::NamespaceSupport" : "0.03",
"XML::SAX::Base" : "1.05"
}
}
},
"release_status" : "stable",
"resources" : {
"repository" : {
"type" : "git",
"web" : "https://github.com/grantm/xml-sax"
}
},
"version" : "1.02",
"x_serialization_backend" : "JSON::PP version 2.27300"
}

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---
abstract: unknown
author:
- unknown
build_requires:
ExtUtils::MakeMaker: '0'
configure_requires:
ExtUtils::MakeMaker: '0'
dynamic_config: 1
generated_by: 'ExtUtils::MakeMaker version 7.0401, CPAN::Meta::Converter version 2.150005'
license: unknown
meta-spec:
url: http://module-build.sourceforge.net/META-spec-v1.4.html
version: '1.4'
name: XML-SAX
no_index:
directory:
- t
- inc
requires:
File::Temp: '0'
XML::NamespaceSupport: '0.03'
XML::SAX::Base: '1.05'
resources:
repository: https://github.com/grantm/xml-sax
version: '1.02'
x_serialization_backend: 'CPAN::Meta::YAML version 0.018'

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use ExtUtils::MakeMaker;
use File::Basename ();
use File::Spec ();
WriteMakefile(
'NAME' => 'XML::SAX',
'VERSION_FROM' => 'lib/XML/SAX.pm', # finds $VERSION
'PREREQ_PM' => {
'File::Temp' => 0,
'XML::SAX::Base' => 1.05,
'XML::NamespaceSupport' => 0.03,
},
META_MERGE => {
"meta-spec" => { version => 2 },
resources => {
repository => {
type => 'git',
url => 'git@github.com:grantm/XML-SAX.git',
web => 'https://github.com/grantm/xml-sax',
},
},
},
);
sub MY::install {
package MY;
my $script = shift->SUPER::install(@_);
# Only modify existing ParserDetails.ini if user agrees
my $write_ini_ok = 0;
eval { require XML::SAX };
if ($@) {
$write_ini_ok = 1;
}
else {
my $dir = File::Basename::dirname($INC{'XML/SAX.pm'});
if (-e File::Spec->catfile($dir, 'SAX', 'ParserDetails.ini')) {
$write_ini_ok =
ExtUtils::MakeMaker::prompt(
"Do you want XML::SAX to alter ParserDetails.ini?", "Y"
) =~ /^y/i;
}
else {
$write_ini_ok = 1;
}
}
if ($write_ini_ok) {
$script =~ s/install :: (.*)$/install :: $1 install_sax_pureperl/m;
$script .= <<"INSTALL";
install_sax_pureperl : pure_install
\t\@\$(PERL) -MXML::SAX -e "XML::SAX->add_parser(q(XML::SAX::PurePerl))->save_parsers()"
INSTALL
}
return $script;
}

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XML::SAX
========
XML::SAX consists of several framework classes for using and building
Perl SAX2 XML parsers, filters, and drivers. It is designed around the
need to be able to "plug in" different SAX parsers to an application
without requiring programmer intervention. Those of you familiar with
the DBI will be right at home. Some of the designs come from the Java
JAXP specification (SAX part), only without the javaness.
INSTALLATION
============
All of this is 100% perl, so installation should be a breeze:
On Unix and Unix-like platforms:
$ perl Makefile.PL
$ make
$ make test
$ make install
On ActivePerl, or Perl's built with MSVC:
$ perl Makefile.PL
$ nmake
$ nmake test
$ nmake install
USAGE
=====
For usage, please read the included documentation after installation:
$ perldoc XML::SAX
$ perldoc XML::SAX::ParserFactory
And other documents leading off those pages.
LICENSE/COPYRIGHT
=================
Please see the LICENSE file for licensing issues.
The files in this distribution are copyrighted their respective authors
as detailed in the POD documentation of each module.

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# $Id$
package XML::SAX;
use strict;
use vars qw($VERSION @ISA @EXPORT_OK);
$VERSION = '1.02';
use Exporter ();
@ISA = ('Exporter');
@EXPORT_OK = qw(Namespaces Validation);
use File::Basename qw(dirname);
use File::Spec ();
use Symbol qw(gensym);
use XML::SAX::ParserFactory (); # loaded for simplicity
use constant PARSER_DETAILS => "ParserDetails.ini";
use constant Namespaces => "http://xml.org/sax/features/namespaces";
use constant Validation => "http://xml.org/sax/features/validation";
my $known_parsers = undef;
# load_parsers takes the ParserDetails.ini file out of the same directory
# that XML::SAX is in, and looks at it. Format in POD below
=begin EXAMPLE
[XML::SAX::PurePerl]
http://xml.org/sax/features/namespaces = 1
http://xml.org/sax/features/validation = 0
# a comment
# blank lines ignored
[XML::SAX::AnotherParser]
http://xml.org/sax/features/namespaces = 0
http://xml.org/sax/features/validation = 1
=end EXAMPLE
=cut
sub load_parsers {
my $class = shift;
my $dir = shift;
# reset parsers
$known_parsers = [];
# get directory from wherever XML::SAX is installed
if (!$dir) {
$dir = $INC{'XML/SAX.pm'};
$dir = dirname($dir);
}
my $fh = gensym();
if (!open($fh, File::Spec->catfile($dir, "SAX", PARSER_DETAILS))) {
XML::SAX->do_warn("could not find " . PARSER_DETAILS . " in $dir/SAX\n");
return $class;
}
$known_parsers = $class->_parse_ini_file($fh);
return $class;
}
sub _parse_ini_file {
my $class = shift;
my ($fh) = @_;
my @config;
my $lineno = 0;
while (defined(my $line = <$fh>)) {
$lineno++;
my $original = $line;
# strip whitespace
$line =~ s/\s*$//m;
$line =~ s/^\s*//m;
# strip comments
$line =~ s/[#;].*$//m;
# ignore blanks
next if $line =~ /^$/m;
# heading
if ($line =~ /^\[\s*(.*)\s*\]$/m) {
push @config, { Name => $1 };
next;
}
# instruction
elsif ($line =~ /^(.*?)\s*?=\s*(.*)$/) {
unless(@config) {
push @config, { Name => '' };
}
$config[-1]{Features}{$1} = $2;
}
# not whitespace, comment, or instruction
else {
die "Invalid line in ini: $lineno\n>>> $original\n";
}
}
return \@config;
}
sub parsers {
my $class = shift;
if (!$known_parsers) {
$class->load_parsers();
}
return $known_parsers;
}
sub remove_parser {
my $class = shift;
my ($parser_module) = @_;
if (!$known_parsers) {
$class->load_parsers();
}
@$known_parsers = grep { $_->{Name} ne $parser_module } @$known_parsers;
return $class;
}
sub add_parser {
my $class = shift;
my ($parser_module) = @_;
if (!$known_parsers) {
$class->load_parsers();
}
# first load module, then query features, then push onto known_parsers,
my $parser_file = $parser_module;
$parser_file =~ s/::/\//g;
$parser_file .= ".pm";
require $parser_file;
my @features = $parser_module->supported_features();
my $new = { Name => $parser_module };
foreach my $feature (@features) {
$new->{Features}{$feature} = 1;
}
# If exists in list already, move to end.
my $done = 0;
my $pos = undef;
for (my $i = 0; $i < @$known_parsers; $i++) {
my $p = $known_parsers->[$i];
if ($p->{Name} eq $parser_module) {
$pos = $i;
}
}
if (defined $pos) {
splice(@$known_parsers, $pos, 1);
push @$known_parsers, $new;
$done++;
}
# Otherwise (not in list), add at end of list.
if (!$done) {
push @$known_parsers, $new;
}
return $class;
}
sub save_parsers {
my $class = shift;
# get directory from wherever XML::SAX is installed
my $dir = $INC{'XML/SAX.pm'};
$dir = dirname($dir);
my $file = File::Spec->catfile($dir, "SAX", PARSER_DETAILS);
chmod 0644, $file;
unlink($file);
my $fh = gensym();
open($fh, ">$file") ||
die "Cannot write to $file: $!";
foreach my $p (@$known_parsers) {
print $fh "[$p->{Name}]\n";
foreach my $key (keys %{$p->{Features}}) {
print $fh "$key = $p->{Features}{$key}\n";
}
print $fh "\n";
}
print $fh "\n";
close $fh;
return $class;
}
sub do_warn {
my $class = shift;
# Don't output warnings if running under Test::Harness
warn(@_) unless $ENV{HARNESS_ACTIVE};
}
1;
__END__
=head1 NAME
XML::SAX - Simple API for XML
=head1 SYNOPSIS
use XML::SAX;
# get a list of known parsers
my $parsers = XML::SAX->parsers();
# add/update a parser
XML::SAX->add_parser(q(XML::SAX::PurePerl));
# remove parser
XML::SAX->remove_parser(q(XML::SAX::Foodelberry));
# save parsers
XML::SAX->save_parsers();
=head1 DESCRIPTION
XML::SAX is a SAX parser access API for Perl. It includes classes
and APIs required for implementing SAX drivers, along with a factory
class for returning any SAX parser installed on the user's system.
=head1 USING A SAX2 PARSER
The factory class is XML::SAX::ParserFactory. Please see the
documentation of that module for how to instantiate a SAX parser:
L<XML::SAX::ParserFactory>. However if you don't want to load up
another manual page, here's a short synopsis:
use XML::SAX::ParserFactory;
use XML::SAX::XYZHandler;
my $handler = XML::SAX::XYZHandler->new();
my $p = XML::SAX::ParserFactory->parser(Handler => $handler);
$p->parse_uri("foo.xml");
# or $p->parse_string("<foo/>") or $p->parse_file($fh);
This will automatically load a SAX2 parser (defaulting to
XML::SAX::PurePerl if no others are found) and return it to you.
In order to learn how to use SAX to parse XML, you will need to read
L<XML::SAX::Intro> and for reference, L<XML::SAX::Specification>.
=head1 WRITING A SAX2 PARSER
The first thing to remember in writing a SAX2 parser is to subclass
XML::SAX::Base. This will make your life infinitely easier, by providing
a number of methods automagically for you. See L<XML::SAX::Base> for more
details.
When writing a SAX2 parser that is compatible with XML::SAX, you need
to inform XML::SAX of the presence of that driver when you install it.
In order to do that, XML::SAX contains methods for saving the fact that
the parser exists on your system to a "INI" file, which is then loaded
to determine which parsers are installed.
The best way to do this is to follow these rules:
=over 4
=item * Add XML::SAX as a prerequisite in Makefile.PL:
WriteMakefile(
...
PREREQ_PM => { 'XML::SAX' => 0 },
...
);
Alternatively you may wish to check for it in other ways that will
cause more than just a warning.
=item * Add the following code snippet to your Makefile.PL:
sub MY::install {
package MY;
my $script = shift->SUPER::install(@_);
if (ExtUtils::MakeMaker::prompt(
"Do you want to modify ParserDetails.ini?", 'Y')
=~ /^y/i) {
$script =~ s/install :: (.*)$/install :: $1 install_sax_driver/m;
$script .= <<"INSTALL";
install_sax_driver :
\t\@\$(PERL) -MXML::SAX -e "XML::SAX->add_parser(q(\$(NAME)))->save_parsers()"
INSTALL
}
return $script;
}
Note that you should check the output of this - \$(NAME) will use the name of
your distribution, which may not be exactly what you want. For example XML::LibXML
has a driver called XML::LibXML::SAX::Generator, which is used in place of
\$(NAME) in the above.
=item * Add an XML::SAX test:
A test file should be added to your t/ directory containing something like the
following:
use Test;
BEGIN { plan tests => 3 }
use XML::SAX;
use XML::SAX::PurePerl::DebugHandler;
XML::SAX->add_parser(q(XML::SAX::MyDriver));
local $XML::SAX::ParserPackage = 'XML::SAX::MyDriver';
eval {
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::ParserFactory->parser(Handler => $handler);
ok($parser);
ok($parser->isa('XML::SAX::MyDriver');
$parser->parse_string("<tag/>");
ok($handler->{seen}{start_element});
};
=back
=head1 EXPORTS
By default, XML::SAX exports nothing into the caller's namespace. However you
can request the symbols C<Namespaces> and C<Validation> which are the
URIs for those features, allowing an easier way to request those features
via ParserFactory:
use XML::SAX qw(Namespaces Validation);
my $factory = XML::SAX::ParserFactory->new();
$factory->require_feature(Namespaces);
$factory->require_feature(Validation);
my $parser = $factory->parser();
=head1 AUTHOR
Current maintainer: Grant McLean, grantm@cpan.org
Originally written by:
Matt Sergeant, matt@sergeant.org
Kip Hampton, khampton@totalcinema.com
Robin Berjon, robin@knowscape.com
=head1 LICENSE
This is free software, you may use it and distribute it under
the same terms as Perl itself.
=head1 SEE ALSO
L<XML::SAX::Base> for writing SAX Filters and Parsers
L<XML::SAX::PurePerl> for an XML parser written in 100%
pure perl.
L<XML::SAX::Exception> for details on exception handling
=cut

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# $Id$
package XML::SAX::DocumentLocator;
use strict;
sub new {
my $class = shift;
my %object;
tie %object, $class, @_;
return bless \%object, $class;
}
sub TIEHASH {
my $class = shift;
my ($pubmeth, $sysmeth, $linemeth, $colmeth, $encmeth, $xmlvmeth) = @_;
return bless {
pubmeth => $pubmeth,
sysmeth => $sysmeth,
linemeth => $linemeth,
colmeth => $colmeth,
encmeth => $encmeth,
xmlvmeth => $xmlvmeth,
}, $class;
}
sub FETCH {
my ($self, $key) = @_;
my $method;
if ($key eq 'PublicId') {
$method = $self->{pubmeth};
}
elsif ($key eq 'SystemId') {
$method = $self->{sysmeth};
}
elsif ($key eq 'LineNumber') {
$method = $self->{linemeth};
}
elsif ($key eq 'ColumnNumber') {
$method = $self->{colmeth};
}
elsif ($key eq 'Encoding') {
$method = $self->{encmeth};
}
elsif ($key eq 'XMLVersion') {
$method = $self->{xmlvmeth};
}
if ($method) {
my $value = $method->($key);
return $value;
}
return undef;
}
sub EXISTS {
my ($self, $key) = @_;
if ($key =~ /^(PublicId|SystemId|LineNumber|ColumnNumber|Encoding|XMLVersion)$/) {
return 1;
}
return 0;
}
sub STORE {
my ($self, $key, $value) = @_;
}
sub DELETE {
my ($self, $key) = @_;
}
sub CLEAR {
my ($self) = @_;
}
sub FIRSTKEY {
my ($self) = @_;
# assignment resets.
$self->{keys} = {
PublicId => 1,
SystemId => 1,
LineNumber => 1,
ColumnNumber => 1,
Encoding => 1,
XMLVersion => 1,
};
return each %{$self->{keys}};
}
sub NEXTKEY {
my ($self, $lastkey) = @_;
return each %{$self->{keys}};
}
1;
__END__
=head1 NAME
XML::SAX::DocumentLocator - Helper class for document locators
=head1 SYNOPSIS
my $locator = XML::SAX::DocumentLocator->new(
sub { $object->get_public_id },
sub { $object->get_system_id },
sub { $reader->current_line },
sub { $reader->current_column },
sub { $reader->get_encoding },
sub { $reader->get_xml_version },
);
=head1 DESCRIPTION
This module gives you a tied hash reference that calls the
specified closures when asked for PublicId, SystemId,
LineNumber and ColumnNumber.
It is useful for writing SAX Parsers so that you don't have
to constantly update the line numbers in a hash reference on
the object you pass to set_document_locator(). See the source
code for XML::SAX::PurePerl for a usage example.
=head1 API
There is only 1 method: C<new>. Simply pass it a list of
closures that when called will return the PublicId, the
SystemId, the LineNumber, the ColumnNumber, the Encoding
and the XMLVersion respectively.
The closures are passed a single parameter, the key being
requested. But you're free to ignore that.
=cut

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=head1 NAME
XML::SAX::Intro - An Introduction to SAX Parsing with Perl
=head1 Introduction
XML::SAX is a new way to work with XML Parsers in Perl. In this article
we'll discuss why you should be using SAX, why you should be using
XML::SAX, and we'll see some of the finer implementation details. The
text below assumes some familiarity with callback, or push based
parsing, but if you are unfamiliar with these techniques then a good
place to start is Kip Hampton's excellent series of articles on XML.com.
=head1 Replacing XML::Parser
The de-facto way of parsing XML under perl is to use Larry Wall and
Clark Cooper's XML::Parser. This module is a Perl and XS wrapper around
the expat XML parser library by James Clark. It has been a hugely
successful project, but suffers from a couple of rather major flaws.
Firstly it is a proprietary API, designed before the SAX API was
conceived, which means that it is not easily replaceable by other
streaming parsers. Secondly it's callbacks are subrefs. This doesn't
sound like much of an issue, but unfortunately leads to code like:
sub handle_start {
my ($e, $el, %attrs) = @_;
if ($el eq 'foo') {
$e->{inside_foo}++; # BAD! $e is an XML::Parser::Expat object.
}
}
As you can see, we're using the $e object to hold our state
information, which is a bad idea because we don't own that object - we
didn't create it. It's an internal object of XML::Parser, that happens
to be a hashref. We could all too easily overwrite XML::Parser internal
state variables by using this, or Clark could change it to an array ref
(not that he would, because it would break so much code, but he could).
The only way currently with XML::Parser to safely maintain state is to
use a closure:
my $state = MyState->new();
$parser->setHandlers(Start => sub { handle_start($state, @_) });
This closure traps the $state variable, which now gets passed as the
first parameter to your callback. Unfortunately very few people use
this technique, as it is not documented in the XML::Parser POD files.
Another reason you might not want to use XML::Parser is because you
need some feature that it doesn't provide (such as validation), or you
might need to use a library that doesn't use expat, due to it not being
installed on your system, or due to having a restrictive ISP. Using SAX
allows you to work around these restrictions.
=head1 Introducing SAX
SAX stands for the Simple API for XML. And simple it really is.
Constructing a SAX parser and passing events to handlers is done as
simply as:
use XML::SAX;
use MySAXHandler;
my $parser = XML::SAX::ParserFactory->parser(
Handler => MySAXHandler->new
);
$parser->parse_uri("foo.xml");
The important concept to grasp here is that SAX uses a factory class
called XML::SAX::ParserFactory to create a new parser instance. The
reason for this is so that you can support other underlying
parser implementations for different feature sets. This is one thing
that XML::Parser has always sorely lacked.
In the code above we see the parse_uri method used, but we could
have equally well
called parse_file, parse_string, or parse(). Please see XML::SAX::Base
for what these methods take as parameters, but don't be fooled into
believing parse_file takes a filename. No, it takes a file handle, a
glob, or a subclass of IO::Handle. Beware.
SAX works very similarly to XML::Parser's default callback method,
except it has one major difference: rather than setting individual
callbacks, you create a new class in which to receive the callbacks.
Each callback is called as a method call on an instance of that handler
class. An example will best demonstrate this:
package MySAXHandler;
use base qw(XML::SAX::Base);
sub start_document {
my ($self, $doc) = @_;
# process document start event
}
sub start_element {
my ($self, $el) = @_;
# process element start event
}
Now, when we instantiate this as above, and parse some XML with this as
the handler, the methods start_document and start_element will be
called as method calls, so this would be the equivalent of directly
calling:
$object->start_element($el);
Notice how this is different to XML::Parser's calling style, which
calls:
start_element($e, $name, %attribs);
It's the difference between function calling and method calling which
allows you to subclass SAX handlers which contributes to SAX being a
powerful solution.
As you can see, unlike XML::Parser, we have to define a new package in
which to do our processing (there are hacks you can do to make this
uneccessary, but I'll leave figuring those out to the experts). The
biggest benefit of this is that you maintain your own state variable
($self in the above example) thus freeing you of the concerns listed
above. It is also an improvement in maintainability - you can place the
code in a separate file if you wish to, and your callback methods are
always called the same thing, rather than having to choose a suitable
name for them as you had to with XML::Parser. This is an obvious win.
SAX parsers are also very flexible in how you pass a handler to them.
You can use a constructor parameter as we saw above, or we can pass the
handler directly in the call to one of the parse methods:
$parser->parse(Handler => $handler,
Source => { SystemId => "foo.xml" });
# or...
$parser->parse_file($fh, Handler => $handler);
This flexibility allows for one parser to be used in many different
scenarios throughout your script (though one shouldn't feel pressure to
use this method, as parser construction is generally not a time
consuming process).
=head1 Callback Parameters
The only other thing you need to know to understand basic SAX is the
structure of the parameters passed to each of the callbacks. In
XML::Parser, all parameters are passed as multiple options to the
callbacks, so for example the Start callback would be called as
my_start($e, $name, %attributes), and the PI callback would be called
as my_processing_instruction($e, $target, $data). In SAX, every
callback is passed a hash reference, containing entries that define our
"node". The key callbacks and the structures they receive are:
=head2 start_element
The start_element handler is called whenever a parser sees an opening
tag. It is passed an element structure consisting of:
=over 4
=item LocalName
The name of the element minus any namespace prefix it may
have come with in the document.
=item NamespaceURI
The URI of the namespace associated with this element,
or the empty string for none.
=item Attributes
A set of attributes as described below.
=item Name
The name of the element as it was seen in the document (i.e.
including any prefix associated with it)
=item Prefix
The prefix used to qualify this element's namespace, or the
empty string if none.
=back
The B<Attributes> are a hash reference, keyed by what we have called
"James Clark" notation. This means that the attribute name has been
expanded to include any associated namespace URI, and put together as
{ns}name, where "ns" is the expanded namespace URI of the attribute if
and only if the attribute had a prefix, and "name" is the LocalName of
the attribute.
The value of each entry in the attributes hash is another hash
structure consisting of:
=over 4
=item LocalName
The name of the attribute minus any namespace prefix it may have
come with in the document.
=item NamespaceURI
The URI of the namespace associated with this attribute. If the
attribute had no prefix, then this consists of just the empty string.
=item Name
The attribute's name as it appeared in the document, including any
namespace prefix.
=item Prefix
The prefix used to qualify this attribute's namepace, or the
empty string if none.
=item Value
The value of the attribute.
=back
So a full example, as output by Data::Dumper might be:
....
=head2 end_element
The end_element handler is called either when a parser sees a closing
tag, or after start_element has been called for an empty element (do
note however that a parser may if it is so inclined call characters
with an empty string when it sees an empty element. There is no simple
way in SAX to determine if the parser in fact saw an empty element, a
start and end element with no content..
The end_element handler receives exactly the same structure as
start_element, minus the Attributes entry. One must note though that it
should not be a reference to the same data as start_element receives,
so you may change the values in start_element but this will not affect
the values later seen by end_element.
=head2 characters
The characters callback may be called in serveral circumstances. The
most obvious one is when seeing ordinary character data in the markup.
But it is also called for text in a CDATA section, and is also called
in other situations. A SAX parser has to make no guarantees whatsoever
about how many times it may call characters for a stretch of text in an
XML document - it may call once, or it may call once for every
character in the text. In order to work around this it is often
important for the SAX developer to use a bundling technique, where text
is gathered up and processed in one of the other callbacks. This is not
always necessary, but it is a worthwhile technique to learn, which we
will cover in XML::SAX::Advanced (when I get around to writing it).
The characters handler is called with a very simple structure - a hash
reference consisting of just one entry:
=over 4
=item Data
The text data that was received.
=back
=head2 comment
The comment callback is called for comment text. Unlike with
C<characters()>, the comment callback *must* be invoked just once for an
entire comment string. It receives a single simple structure - a hash
reference containing just one entry:
=over 4
=item Data
The text of the comment.
=back
=head2 processing_instruction
The processing instruction handler is called for all processing
instructions in the document. Note that these processing instructions
may appear before the document root element, or after it, or anywhere
where text and elements would normally appear within the document,
according to the XML specification.
The handler is passed a structure containing just two entries:
=over 4
=item Target
The target of the processing instrcution
=item Data
The text data in the processing instruction. Can be an empty
string for a processing instruction that has no data element.
For example E<lt>?wiggle?E<gt> is a perfectly valid processing instruction.
=back
=head1 Tip of the iceberg
What we have discussed above is really the tip of the SAX iceberg. And
so far it looks like there's not much of interest to SAX beyond what we
have seen with XML::Parser. But it does go much further than that, I
promise.
People who hate Object Oriented code for the sake of it may be thinking
here that creating a new package just to parse something is a waste
when they've been parsing things just fine up to now using procedural
code. But there's reason to all this madness. And that reason is SAX
Filters.
As you saw right at the very start, to let the parser know about our
class, we pass it an instance of our class as the Handler to the
parser. But now imagine what would happen if our class could also take
a Handler option, and simply do some processing and pass on our data
further down the line? That in a nutshell is how SAX filters work. It's
Unix pipes for the 21st century!
There are two downsides to this. Number 1 - writing SAX filters can be
tricky. If you look into the future and read the advanced tutorial I'm
writing, you'll see that Handler can come in several shapes and sizes.
So making sure your filter does the right thing can be tricky.
Secondly, constructing complex filter chains can be difficult, and
simple thinking tells us that we only get one pass at our document,
when often we'll need more than that.
Luckily though, those downsides have been fixed by the release of two
very cool modules. What's even better is that I didn't write either of
them!
The first module is XML::SAX::Base. This is a VITAL SAX module that
acts as a base class for all SAX parsers and filters. It provides an
abstraction away from calling the handler methods, that makes sure your
filter or parser does the right thing, and it does it FAST. So, if you
ever need to write a SAX filter, which if you're processing XML -> XML,
or XML -> HTML, then you probably do, then you need to be writing it as
a subclass of XML::SAX::Base. Really - this is advice not to ignore
lightly. I will not go into the details of writing a SAX filter here.
Kip Hampton, the author of XML::SAX::Base has covered this nicely in
his article on XML.com here <URI>.
To construct SAX pipelines, Barrie Slaymaker, a long time Perl hacker
whose modules you will probably have heard of or used, wrote a very
clever module called XML::SAX::Machines. This combines some really
clever SAX filter-type modules, with a construction toolkit for filters
that makes building pipelines easy. But before we see how it makes
things easy, first lets see how tricky it looks to build complex SAX
filter pipelines.
use XML::SAX::ParserFactory;
use XML::Filter::Filter1;
use XML::Filter::Filter2;
use XML::SAX::Writer;
my $output_string;
my $writer = XML::SAX::Writer->new(Output => \$output_string);
my $filter2 = XML::SAX::Filter2->new(Handler => $writer);
my $filter1 = XML::SAX::Filter1->new(Handler => $filter2);
my $parser = XML::SAX::ParserFactory->parser(Handler => $filter1);
$parser->parse_uri("foo.xml");
This is a lot easier with XML::SAX::Machines:
use XML::SAX::Machines qw(Pipeline);
my $output_string;
my $parser = Pipeline(
XML::SAX::Filter1 => XML::SAX::Filter2 => \$output_string
);
$parser->parse_uri("foo.xml");
One of the main benefits of XML::SAX::Machines is that the pipelines
are constructed in natural order, rather than the reverse order we saw
with manual pipeline construction. XML::SAX::Machines takes care of all
the internals of pipe construction, providing you at the end with just
a parser you can use (and you can re-use the same parser as many times
as you need to).
Just a final tip. If you ever get stuck and are confused about what is
being passed from one SAX filter or parser to the next, then
Devel::TraceSAX will come to your rescue. This perl debugger plugin
will allow you to dump the SAX stream of events as it goes by. Usage is
really very simple just call your perl script that uses SAX as follows:
$ perl -d:TraceSAX <scriptname>
And preferably pipe the output to a pager of some sort, such as more or
less. The output is extremely verbose, but should help clear some
issues up.
=head1 AUTHOR
Matt Sergeant, matt@sergeant.org
$Id$
=cut

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# $Id$
package XML::SAX::ParserFactory;
use strict;
use vars qw($VERSION);
$VERSION = '1.02';
use Symbol qw(gensym);
use XML::SAX;
use XML::SAX::Exception;
sub new {
my $class = shift;
my %params = @_; # TODO : Fix this in spec.
my $self = bless \%params, $class;
$self->{KnownParsers} = XML::SAX->parsers();
return $self;
}
sub parser {
my $self = shift;
my @parser_params = @_;
if (!ref($self)) {
$self = $self->new();
}
my $parser_class = $self->_parser_class();
my $version = '';
if ($parser_class =~ s/\s*\(([\d\.]+)\)\s*$//) {
$version = " $1";
}
if (!$parser_class->can('new')) {
eval "require $parser_class $version;";
die $@ if $@;
}
return $parser_class->new(@parser_params);
}
sub require_feature {
my $self = shift;
my ($feature) = @_;
$self->{RequiredFeatures}{$feature}++;
return $self;
}
sub _parser_class {
my $self = shift;
# First try ParserPackage
if ($XML::SAX::ParserPackage) {
return $XML::SAX::ParserPackage;
}
# Now check if required/preferred is there
if ($self->{RequiredFeatures}) {
my %required = %{$self->{RequiredFeatures}};
# note - we never go onto the next try (ParserDetails.ini),
# because if we can't provide the requested feature
# we need to throw an exception.
PARSER:
foreach my $parser (reverse @{$self->{KnownParsers}}) {
foreach my $feature (keys %required) {
if (!exists $parser->{Features}{$feature}) {
next PARSER;
}
}
# got here - all features must exist!
return $parser->{Name};
}
# TODO : should this be NotSupported() ?
throw XML::SAX::Exception (
Message => "Unable to provide required features",
);
}
# Next try SAX.ini
for my $dir (@INC) {
my $fh = gensym();
if (open($fh, "$dir/SAX.ini")) {
my $param_list = XML::SAX->_parse_ini_file($fh);
my $params = $param_list->[0]->{Features};
if ($params->{ParserPackage}) {
return $params->{ParserPackage};
}
else {
# we have required features (or nothing?)
PARSER:
foreach my $parser (reverse @{$self->{KnownParsers}}) {
foreach my $feature (keys %$params) {
if (!exists $parser->{Features}{$feature}) {
next PARSER;
}
}
return $parser->{Name};
}
XML::SAX->do_warn("Unable to provide SAX.ini required features. Using fallback\n");
}
last; # stop after first INI found
}
}
if (@{$self->{KnownParsers}}) {
return $self->{KnownParsers}[-1]{Name};
}
else {
return "XML::SAX::PurePerl"; # backup plan!
}
}
1;
__END__
=head1 NAME
XML::SAX::ParserFactory - Obtain a SAX parser
=head1 SYNOPSIS
use XML::SAX::ParserFactory;
use XML::SAX::XYZHandler;
my $handler = XML::SAX::XYZHandler->new();
my $p = XML::SAX::ParserFactory->parser(Handler => $handler);
$p->parse_uri("foo.xml");
# or $p->parse_string("<foo/>") or $p->parse_file($fh);
=head1 DESCRIPTION
XML::SAX::ParserFactory is a factory class for providing an application
with a Perl SAX2 XML parser. It is akin to DBI - a front end for other
parser classes. Each new SAX2 parser installed will register itself
with XML::SAX, and then it will become available to all applications
that use XML::SAX::ParserFactory to obtain a SAX parser.
Unlike DBI however, XML/SAX parsers almost all work alike (especially
if they subclass XML::SAX::Base, as they should), so rather than
specifying the parser you want in the call to C<parser()>, XML::SAX
has several ways to automatically choose which parser to use:
=over 4
=item * $XML::SAX::ParserPackage
If this package variable is set, then this package is C<require()>d
and an instance of this package is returned by calling the C<new()>
class method in that package. If it cannot be loaded or there is
an error, an exception will be thrown. The variable can also contain
a version number:
$XML::SAX::ParserPackage = "XML::SAX::Expat (0.72)";
And the number will be treated as a minimum version number.
=item * Required features
It is possible to require features from the parsers. For example, you
may wish for a parser that supports validation via a DTD. To do that,
use the following code:
use XML::SAX::ParserFactory;
my $factory = XML::SAX::ParserFactory->new();
$factory->require_feature('http://xml.org/sax/features/validation');
my $parser = $factory->parser(...);
Alternatively, specify the required features in the call to the
ParserFactory constructor:
my $factory = XML::SAX::ParserFactory->new(
RequiredFeatures => {
'http://xml.org/sax/features/validation' => 1,
}
);
If the features you have asked for are unavailable (for example the
user might not have a validating parser installed), then an
exception will be thrown.
The list of known parsers is searched in reverse order, so it will
always return the last installed parser that supports all of your
requested features (Note: this is subject to change if someone
comes up with a better way of making this work).
=item * SAX.ini
ParserFactory will search @INC for a file called SAX.ini, which
is in a simple format:
# a comment looks like this,
; or like this, and are stripped anywhere in the file
key = value # SAX.in contains key/value pairs.
All whitespace is non-significant.
This file can contain either a line:
ParserPackage = MyParserModule (1.02)
Where MyParserModule is the module to load and use for the parser,
and the number in brackets is a minimum version to load.
Or you can list required features:
http://xml.org/sax/features/validation = 1
And each feature with a true value will be required.
=item * Fallback
If none of the above works, the last parser installed on the user's
system will be used. The XML::SAX package ships with a pure perl
XML parser, XML::SAX::PurePerl, so that there will always be a
fallback parser.
=back
=head1 AUTHOR
Matt Sergeant, matt@sergeant.org
=head1 LICENSE
This is free software, you may use it and distribute it under the same
terms as Perl itself.
=cut

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# $Id$
package XML::SAX::PurePerl;
use strict;
use vars qw/$VERSION/;
$VERSION = '1.02';
use XML::SAX::PurePerl::Productions qw($NameChar $SingleChar);
use XML::SAX::PurePerl::Reader;
use XML::SAX::PurePerl::EncodingDetect ();
use XML::SAX::Exception;
use XML::SAX::PurePerl::DocType ();
use XML::SAX::PurePerl::DTDDecls ();
use XML::SAX::PurePerl::XMLDecl ();
use XML::SAX::DocumentLocator ();
use XML::SAX::Base ();
use XML::SAX qw(Namespaces);
use XML::NamespaceSupport ();
use IO::File;
if ($] < 5.006) {
require XML::SAX::PurePerl::NoUnicodeExt;
}
else {
require XML::SAX::PurePerl::UnicodeExt;
}
use vars qw(@ISA);
@ISA = ('XML::SAX::Base');
my %int_ents = (
amp => '&',
lt => '<',
gt => '>',
quot => '"',
apos => "'",
);
my $xmlns_ns = "http://www.w3.org/2000/xmlns/";
my $xml_ns = "http://www.w3.org/XML/1998/namespace";
use Carp;
sub _parse_characterstream {
my $self = shift;
my ($fh) = @_;
confess("CharacterStream is not yet correctly implemented");
my $reader = XML::SAX::PurePerl::Reader::Stream->new($fh);
return $self->_parse($reader);
}
sub _parse_bytestream {
my $self = shift;
my ($fh) = @_;
my $reader = XML::SAX::PurePerl::Reader::Stream->new($fh);
return $self->_parse($reader);
}
sub _parse_string {
my $self = shift;
my ($str) = @_;
my $reader = XML::SAX::PurePerl::Reader::String->new($str);
return $self->_parse($reader);
}
sub _parse_systemid {
my $self = shift;
my ($uri) = @_;
my $reader = XML::SAX::PurePerl::Reader::URI->new($uri);
return $self->_parse($reader);
}
sub _parse {
my ($self, $reader) = @_;
$reader->public_id($self->{ParseOptions}{Source}{PublicId});
$reader->system_id($self->{ParseOptions}{Source}{SystemId});
$self->{NSHelper} = XML::NamespaceSupport->new({xmlns => 1});
$self->set_document_locator(
XML::SAX::DocumentLocator->new(
sub { $reader->public_id },
sub { $reader->system_id },
sub { $reader->line },
sub { $reader->column },
sub { $reader->get_encoding },
sub { $reader->get_xml_version },
),
);
$self->start_document({});
if (defined $self->{ParseOptions}{Source}{Encoding}) {
$reader->set_encoding($self->{ParseOptions}{Source}{Encoding});
}
else {
$self->encoding_detect($reader);
}
# parse a document
$self->document($reader);
return $self->end_document({});
}
sub parser_error {
my $self = shift;
my ($error, $reader) = @_;
# warn("parser error: $error from ", $reader->line, " : ", $reader->column, "\n");
my $exception = XML::SAX::Exception::Parse->new(
Message => $error,
ColumnNumber => $reader->column,
LineNumber => $reader->line,
PublicId => $reader->public_id,
SystemId => $reader->system_id,
);
$self->fatal_error($exception);
$exception->throw;
}
sub document {
my ($self, $reader) = @_;
# document ::= prolog element Misc*
$self->prolog($reader);
$self->element($reader) ||
$self->parser_error("Document requires an element", $reader);
while(length($reader->data)) {
$self->Misc($reader) ||
$self->parser_error("Only Comments, PIs and whitespace allowed at end of document", $reader);
}
}
sub prolog {
my ($self, $reader) = @_;
$self->XMLDecl($reader);
# consume all misc bits
1 while($self->Misc($reader));
if ($self->doctypedecl($reader)) {
while (length($reader->data)) {
$self->Misc($reader) || last;
}
}
}
sub element {
my ($self, $reader) = @_;
return 0 unless $reader->match('<');
my $name = $self->Name($reader) || $self->parser_error("Invalid element name", $reader);
my %attribs;
while( my ($k, $v) = $self->Attribute($reader) ) {
$attribs{$k} = $v;
}
my $have_namespaces = $self->get_feature(Namespaces);
# Namespace processing
$self->{NSHelper}->push_context;
my @new_ns;
# my %attrs = @attribs;
# while (my ($k,$v) = each %attrs) {
if ($have_namespaces) {
while ( my ($k, $v) = each %attribs ) {
if ($k =~ m/^xmlns(:(.*))?$/) {
my $prefix = $2 || '';
$self->{NSHelper}->declare_prefix($prefix, $v);
my $ns =
{
Prefix => $prefix,
NamespaceURI => $v,
};
push @new_ns, $ns;
$self->SUPER::start_prefix_mapping($ns);
}
}
}
# Create element object and fire event
my %attrib_hash;
while (my ($name, $value) = each %attribs ) {
# TODO normalise value here
my ($ns, $prefix, $lname);
if ($have_namespaces) {
($ns, $prefix, $lname) = $self->{NSHelper}->process_attribute_name($name);
}
$ns ||= ''; $prefix ||= ''; $lname ||= '';
$attrib_hash{"{$ns}$lname"} = {
Name => $name,
LocalName => $lname,
Prefix => $prefix,
NamespaceURI => $ns,
Value => $value,
};
}
%attribs = (); # lose the memory since we recurse deep
my ($ns, $prefix, $lname);
if ($self->get_feature(Namespaces)) {
($ns, $prefix, $lname) = $self->{NSHelper}->process_element_name($name);
}
else {
$lname = $name;
}
$ns ||= ''; $prefix ||= ''; $lname ||= '';
# Process remainder of start_element
$self->skip_whitespace($reader);
my $have_content;
my $data = $reader->data(2);
if ($data =~ /^\/>/) {
$reader->move_along(2);
}
else {
$data =~ /^>/ or $self->parser_error("No close element tag", $reader);
$reader->move_along(1);
$have_content++;
}
my $el =
{
Name => $name,
LocalName => $lname,
Prefix => $prefix,
NamespaceURI => $ns,
Attributes => \%attrib_hash,
};
$self->start_element($el);
# warn("($name\n");
if ($have_content) {
$self->content($reader);
my $data = $reader->data(2);
$data =~ /^<\// or $self->parser_error("No close tag marker", $reader);
$reader->move_along(2);
my $end_name = $self->Name($reader);
$end_name eq $name || $self->parser_error("End tag mismatch ($end_name != $name)", $reader);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("No close '>' on end tag", $reader);
}
my %end_el = %$el;
delete $end_el{Attributes};
$self->end_element(\%end_el);
for my $ns (@new_ns) {
$self->end_prefix_mapping($ns);
}
$self->{NSHelper}->pop_context;
return 1;
}
sub content {
my ($self, $reader) = @_;
while (1) {
$self->CharData($reader);
my $data = $reader->data(2);
if ($data =~ /^<\//) {
return 1;
}
elsif ($data =~ /^&/) {
$self->Reference($reader) or $self->parser_error("bare & not allowed in content", $reader);
next;
}
elsif ($data =~ /^<!/) {
($self->CDSect($reader)
or
$self->Comment($reader))
and next;
}
elsif ($data =~ /^<\?/) {
$self->PI($reader) and next;
}
elsif ($data =~ /^</) {
$self->element($reader) and next;
}
last;
}
return 1;
}
sub CDSect {
my ($self, $reader) = @_;
my $data = $reader->data(9);
return 0 unless $data =~ /^<!\[CDATA\[/;
$reader->move_along(9);
$self->start_cdata({});
$data = $reader->data;
while (1) {
$self->parser_error("EOF looking for CDATA section end", $reader)
unless length($data);
if ($data =~ /^(.*?)\]\]>/s) {
my $chars = $1;
$reader->move_along(length($chars) + 3);
$self->characters({Data => $chars});
last;
}
else {
$self->characters({Data => $data});
$reader->move_along(length($data));
$data = $reader->data;
}
}
$self->end_cdata({});
return 1;
}
sub CharData {
my ($self, $reader) = @_;
my $data = $reader->data;
while (1) {
return unless length($data);
if ($data =~ /^([^<&]*)[<&]/s) {
my $chars = $1;
$self->parser_error("String ']]>' not allowed in character data", $reader)
if $chars =~ /\]\]>/;
$reader->move_along(length($chars));
$self->characters({Data => $chars}) if length($chars);
last;
}
else {
$self->characters({Data => $data});
$reader->move_along(length($data));
$data = $reader->data;
}
}
}
sub Misc {
my ($self, $reader) = @_;
if ($self->Comment($reader)) {
return 1;
}
elsif ($self->PI($reader)) {
return 1;
}
elsif ($self->skip_whitespace($reader)) {
return 1;
}
return 0;
}
sub Reference {
my ($self, $reader) = @_;
return 0 unless $reader->match('&');
my $data = $reader->data;
# Fetch more data if we have an incomplete numeric reference
if ($data =~ /^(#\d*|#x[0-9a-fA-F]*)$/) {
$data = $reader->data(length($data) + 6);
}
if ($data =~ /^#x([0-9a-fA-F]+);/) {
my $ref = $1;
$reader->move_along(length($ref) + 3);
my $char = chr_ref(hex($ref));
$self->parser_error("Character reference &#$ref; refers to an illegal XML character ($char)", $reader)
unless $char =~ /$SingleChar/o;
$self->characters({ Data => $char });
return 1;
}
elsif ($data =~ /^#([0-9]+);/) {
my $ref = $1;
$reader->move_along(length($ref) + 2);
my $char = chr_ref($ref);
$self->parser_error("Character reference &#$ref; refers to an illegal XML character ($char)", $reader)
unless $char =~ /$SingleChar/o;
$self->characters({ Data => $char });
return 1;
}
else {
# EntityRef
my $name = $self->Name($reader)
|| $self->parser_error("Invalid name in entity", $reader);
$reader->match(';') or $self->parser_error("No semi-colon found after entity name", $reader);
# warn("got entity: \&$name;\n");
# expand it
if ($self->_is_entity($name)) {
if ($self->_is_external($name)) {
my $value = $self->_get_entity($name);
my $ent_reader = XML::SAX::PurePerl::Reader::URI->new($value);
$self->encoding_detect($ent_reader);
$self->extParsedEnt($ent_reader);
}
else {
my $value = $self->_stringify_entity($name);
my $ent_reader = XML::SAX::PurePerl::Reader::String->new($value);
$self->content($ent_reader);
}
return 1;
}
elsif ($name =~ /^(?:amp|gt|lt|quot|apos)$/) {
$self->characters({ Data => $int_ents{$name} });
return 1;
}
else {
$self->parser_error("Undeclared entity", $reader);
}
}
}
sub AttReference {
my ($self, $name, $reader) = @_;
if ($name =~ /^#x([0-9a-fA-F]+)$/) {
my $chr = chr_ref(hex($1));
$chr =~ /$SingleChar/o or $self->parser_error("Character reference '&$name;' refers to an illegal XML character", $reader);
return $chr;
}
elsif ($name =~ /^#([0-9]+)$/) {
my $chr = chr_ref($1);
$chr =~ /$SingleChar/o or $self->parser_error("Character reference '&$name;' refers to an illegal XML character", $reader);
return $chr;
}
else {
if ($self->_is_entity($name)) {
if ($self->_is_external($name)) {
$self->parser_error("No external entity references allowed in attribute values", $reader);
}
else {
my $value = $self->_stringify_entity($name);
return $value;
}
}
elsif ($name =~ /^(?:amp|lt|gt|quot|apos)$/) {
return $int_ents{$name};
}
else {
$self->parser_error("Undeclared entity '$name'", $reader);
}
}
}
sub extParsedEnt {
my ($self, $reader) = @_;
$self->TextDecl($reader);
$self->content($reader);
}
sub _is_external {
my ($self, $name) = @_;
# TODO: Fix this to use $reader to store the entities perhaps.
if ($self->{ParseOptions}{external_entities}{$name}) {
return 1;
}
return ;
}
sub _is_entity {
my ($self, $name) = @_;
# TODO: ditto above
if (exists $self->{ParseOptions}{entities}{$name}) {
return 1;
}
return 0;
}
sub _stringify_entity {
my ($self, $name) = @_;
# TODO: ditto above
if (exists $self->{ParseOptions}{expanded_entity}{$name}) {
return $self->{ParseOptions}{expanded_entity}{$name};
}
# expand
my $reader = XML::SAX::PurePerl::Reader::URI->new($self->{ParseOptions}{entities}{$name});
my $ent = '';
while(1) {
my $data = $reader->data;
$ent .= $data;
$reader->move_along(length($data)) or last;
}
return $self->{ParseOptions}{expanded_entity}{$name} = $ent;
}
sub _get_entity {
my ($self, $name) = @_;
# TODO: ditto above
return $self->{ParseOptions}{entities}{$name};
}
sub skip_whitespace {
my ($self, $reader) = @_;
my $data = $reader->data;
my $found = 0;
while ($data =~ s/^([\x20\x0A\x0D\x09]*)//) {
last unless length($1);
$found++;
$reader->move_along(length($1));
$data = $reader->data;
}
return $found;
}
sub Attribute {
my ($self, $reader) = @_;
$self->skip_whitespace($reader) || return;
my $data = $reader->data(2);
return if $data =~ /^\/?>/;
if (my $name = $self->Name($reader)) {
$self->skip_whitespace($reader);
$reader->match('=') or $self->parser_error("No '=' in Attribute", $reader);
$self->skip_whitespace($reader);
my $value = $self->AttValue($reader);
if (!$self->cdata_attrib($name)) {
$value =~ s/^\x20*//; # discard leading spaces
$value =~ s/\x20*$//; # discard trailing spaces
$value =~ s/ {1,}/ /g; # all >1 space to single space
}
return $name, $value;
}
return;
}
sub cdata_attrib {
# TODO implement this!
return 1;
}
sub AttValue {
my ($self, $reader) = @_;
my $quote = $self->quote($reader);
my $value = '';
while (1) {
my $data = $reader->data;
$self->parser_error("EOF found while looking for the end of attribute value", $reader)
unless length($data);
if ($data =~ /^([^$quote]*)$quote/) {
$reader->move_along(length($1) + 1);
$value .= $1;
last;
}
else {
$value .= $data;
$reader->move_along(length($data));
}
}
if ($value =~ /</) {
$self->parser_error("< character not allowed in attribute values", $reader);
}
$value =~ s/[\x09\x0A\x0D]/\x20/g;
$value =~ s/&(#(x[0-9a-fA-F]+)|#([0-9]+)|\w+);/$self->AttReference($1, $reader)/geo;
return $value;
}
sub Comment {
my ($self, $reader) = @_;
my $data = $reader->data(4);
if ($data =~ /^<!--/) {
$reader->move_along(4);
my $comment_str = '';
while (1) {
my $data = $reader->data;
$self->parser_error("End of data seen while looking for close comment marker", $reader)
unless length($data);
if ($data =~ /^(.*?)-->/s) {
$comment_str .= $1;
$self->parser_error("Invalid comment (dash)", $reader) if $comment_str =~ /-$/;
$reader->move_along(length($1) + 3);
last;
}
else {
$comment_str .= $data;
$reader->move_along(length($data));
}
}
$self->comment({ Data => $comment_str });
return 1;
}
return 0;
}
sub PI {
my ($self, $reader) = @_;
my $data = $reader->data(2);
if ($data =~ /^<\?/) {
$reader->move_along(2);
my ($target);
$target = $self->Name($reader) ||
$self->parser_error("PI has no target", $reader);
my $pi_data = '';
if ($self->skip_whitespace($reader)) {
while (1) {
my $data = $reader->data;
$self->parser_error("End of data seen while looking for close PI marker", $reader)
unless length($data);
if ($data =~ /^(.*?)\?>/s) {
$pi_data .= $1;
$reader->move_along(length($1) + 2);
last;
}
else {
$pi_data .= $data;
$reader->move_along(length($data));
}
}
}
else {
my $data = $reader->data(2);
$data =~ /^\?>/ or $self->parser_error("PI closing sequence not found", $reader);
$reader->move_along(2);
}
$self->processing_instruction({ Target => $target, Data => $pi_data });
return 1;
}
return 0;
}
sub Name {
my ($self, $reader) = @_;
my $name = '';
while(1) {
my $data = $reader->data;
return unless length($data);
$data =~ /^([^\s>\/&\?;=<\)\(\[\],\%\#\!\*\|]*)/ or return;
$name .= $1;
my $len = length($1);
$reader->move_along($len);
last if ($len != length($data));
}
return unless length($name);
$name =~ /$NameChar/o or $self->parser_error("Name <$name> does not match NameChar production", $reader);
return $name;
}
sub quote {
my ($self, $reader) = @_;
my $data = $reader->data;
$data =~ /^(['"])/ or $self->parser_error("Invalid quote token", $reader);
$reader->move_along(1);
return $1;
}
1;
__END__
=head1 NAME
XML::SAX::PurePerl - Pure Perl XML Parser with SAX2 interface
=head1 SYNOPSIS
use XML::Handler::Foo;
use XML::SAX::PurePerl;
my $handler = XML::Handler::Foo->new();
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
$parser->parse_uri("myfile.xml");
=head1 DESCRIPTION
This module implements an XML parser in pure perl. It is written around the
upcoming perl 5.8's unicode support and support for multiple document
encodings (using the PerlIO layer), however it has been ported to work with
ASCII/UTF8 documents under lower perl versions.
The SAX2 API is described in detail at http://sourceforge.net/projects/perl-xml/, in
the CVS archive, under libxml-perl/docs. Hopefully those documents will be in a
better location soon.
Please refer to the SAX2 documentation for how to use this module - it is merely a
front end to SAX2, and implements nothing that is not in that spec (or at least tries
not to - please email me if you find errors in this implementation).
=head1 BUGS
XML::SAX::PurePerl is B<slow>. Very slow. I suggest you use something else
in fact. However it is great as a fallback parser for XML::SAX, where the
user might not be able to install an XS based parser or C library.
Currently lots, probably. At the moment the weakest area is parsing DOCTYPE declarations,
though the code is in place to start doing this. Also parsing parameter entity
references is causing me much confusion, since it's not exactly what I would call
trivial, or well documented in the XML grammar. XML documents with internal subsets
are likely to fail.
I am however trying to work towards full conformance using the Oasis test suite.
=head1 AUTHOR
Matt Sergeant, matt@sergeant.org. Copyright 2001.
Please report all bugs to the Perl-XML mailing list at perl-xml@listserv.activestate.com.
=head1 LICENSE
This is free software. You may use it or redistribute it under the same terms as
Perl 5.7.2 itself.
=cut

View File

@ -0,0 +1,603 @@
# $Id$
package XML::SAX::PurePerl;
use strict;
use XML::SAX::PurePerl::Productions qw($SingleChar);
sub elementdecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
return 0 unless $data =~ /^<!ELEMENT/;
$reader->move_along(9);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ELEMENT declaration", $reader);
my $name = $self->Name($reader);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ELEMENT's name", $reader);
$self->contentspec($reader, $name);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("Closing angle bracket not found on ELEMENT declaration", $reader);
return 1;
}
sub contentspec {
my ($self, $reader, $name) = @_;
my $data = $reader->data(5);
my $model;
if ($data =~ /^EMPTY/) {
$reader->move_along(5);
$model = 'EMPTY';
}
elsif ($data =~ /^ANY/) {
$reader->move_along(3);
$model = 'ANY';
}
else {
$model = $self->Mixed_or_children($reader);
}
if ($model) {
# call SAX callback now.
$self->element_decl({Name => $name, Model => $model});
return 1;
}
$self->parser_error("contentspec not found in ELEMENT declaration", $reader);
}
sub Mixed_or_children {
my ($self, $reader) = @_;
my $data = $reader->data(8);
$data =~ /^\(/ or return; # $self->parser_error("No opening bracket in Mixed or children", $reader);
if ($data =~ /^\(\s*\#PCDATA/) {
$reader->match('(');
$self->skip_whitespace($reader);
$reader->move_along(7);
my $model = $self->Mixed($reader);
return $model;
}
# not matched - must be Children
return $self->children($reader);
}
# Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' '*' )
# | ( '(' S* PCDATA S* ')' )
sub Mixed {
my ($self, $reader) = @_;
# Mixed_or_children already matched '(' S* '#PCDATA'
my $model = '(#PCDATA';
$self->skip_whitespace($reader);
my %seen;
while (1) {
last unless $reader->match('|');
$self->skip_whitespace($reader);
my $name = $self->Name($reader) ||
$self->parser_error("No 'Name' after Mixed content '|'", $reader);
if ($seen{$name}) {
$self->parser_error("Element '$name' has already appeared in this group", $reader);
}
$seen{$name}++;
$model .= "|$name";
$self->skip_whitespace($reader);
}
$reader->match(')') || $self->parser_error("no closing bracket on mixed content", $reader);
$model .= ")";
if ($reader->match('*')) {
$model .= "*";
}
return $model;
}
# [[47]] Children ::= ChoiceOrSeq Cardinality?
# [[48]] Cp ::= ( QName | ChoiceOrSeq ) Cardinality?
# ChoiceOrSeq ::= '(' S* Cp ( Choice | Seq )? S* ')'
# [[49]] Choice ::= ( S* '|' S* Cp )+
# [[50]] Seq ::= ( S* ',' S* Cp )+
# // Children ::= (Choice | Seq) Cardinality?
# // Cp ::= ( QName | Choice | Seq) Cardinality?
# // Choice ::= '(' S* Cp ( S* '|' S* Cp )+ S* ')'
# // Seq ::= '(' S* Cp ( S* ',' S* Cp )* S* ')'
# [[51]] Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' MixedCardinality )
# | ( '(' S* PCDATA S* ')' )
# Cardinality ::= '?' | '+' | '*'
# MixedCardinality ::= '*'
sub children {
my ($self, $reader) = @_;
return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
}
sub ChoiceOrSeq {
my ($self, $reader) = @_;
$reader->match('(') or $self->parser_error("choice/seq contains no opening bracket", $reader);
my $model = '(';
$self->skip_whitespace($reader);
$model .= $self->Cp($reader);
if (my $choice = $self->Choice($reader)) {
$model .= $choice;
}
else {
$model .= $self->Seq($reader);
}
$self->skip_whitespace($reader);
$reader->match(')') or $self->parser_error("choice/seq contains no closing bracket", $reader);
$model .= ')';
return $model;
}
sub Cardinality {
my ($self, $reader) = @_;
# cardinality is always optional
my $data = $reader->data;
if ($data =~ /^([\?\+\*])/) {
$reader->move_along(1);
return $1;
}
return '';
}
sub Cp {
my ($self, $reader) = @_;
my $model;
my $name = eval
{
if (my $name = $self->Name($reader)) {
return $name . $self->Cardinality($reader);
}
};
return $name if defined $name;
return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
}
sub Choice {
my ($self, $reader) = @_;
my $model = '';
$self->skip_whitespace($reader);
while ($reader->match('|')) {
$self->skip_whitespace($reader);
$model .= '|';
$model .= $self->Cp($reader);
$self->skip_whitespace($reader);
}
return $model;
}
sub Seq {
my ($self, $reader) = @_;
my $model = '';
$self->skip_whitespace($reader);
while ($reader->match(',')) {
$self->skip_whitespace($reader);
my $cp = $self->Cp($reader);
if ($cp) {
$model .= ',';
$model .= $cp;
}
$self->skip_whitespace($reader);
}
return $model;
}
sub AttlistDecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
if ($data =~ /^<!ATTLIST/) {
# It's an attlist
$reader->move_along(9);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ATTLIST declaration", $reader);
my $name = $self->Name($reader);
$self->AttDefList($reader, $name);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("Closing angle bracket not found on ATTLIST declaration", $reader);
return 1;
}
return 0;
}
sub AttDefList {
my ($self, $reader, $name) = @_;
1 while $self->AttDef($reader, $name);
}
sub AttDef {
my ($self, $reader, $el_name) = @_;
$self->skip_whitespace($reader) || return 0;
my $att_name = $self->Name($reader) || return 0;
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after Name in attribute definition", $reader);
my $att_type = $self->AttType($reader);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after AttType in attribute definition", $reader);
my ($mode, $value) = $self->DefaultDecl($reader);
# fire SAX event here!
$self->attribute_decl({
eName => $el_name,
aName => $att_name,
Type => $att_type,
Mode => $mode,
Value => $value,
});
return 1;
}
sub AttType {
my ($self, $reader) = @_;
return $self->StringType($reader) ||
$self->TokenizedType($reader) ||
$self->EnumeratedType($reader) ||
$self->parser_error("Can't match AttType", $reader);
}
sub StringType {
my ($self, $reader) = @_;
my $data = $reader->data(5);
return unless $data =~ /^CDATA/;
$reader->move_along(5);
return 'CDATA';
}
sub TokenizedType {
my ($self, $reader) = @_;
my $data = $reader->data(8);
if ($data =~ /^(IDREFS?|ID|ENTITIES|ENTITY|NMTOKENS?)/) {
$reader->move_along(length($1));
return $1;
}
return;
}
sub EnumeratedType {
my ($self, $reader) = @_;
return $self->NotationType($reader) || $self->Enumeration($reader);
}
sub NotationType {
my ($self, $reader) = @_;
my $data = $reader->data(8);
return unless $data =~ /^NOTATION/;
$reader->move_along(8);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after NOTATION", $reader);
$reader->match('(') or $self->parser_error("No opening bracket in notation section", $reader);
$self->skip_whitespace($reader);
my $model = 'NOTATION (';
my $name = $self->Name($reader) ||
$self->parser_error("No name in notation section", $reader);
$model .= $name;
$self->skip_whitespace($reader);
$data = $reader->data;
while ($data =~ /^\|/) {
$reader->move_along(1);
$model .= '|';
$self->skip_whitespace($reader);
my $name = $self->Name($reader) ||
$self->parser_error("No name in notation section", $reader);
$model .= $name;
$self->skip_whitespace($reader);
$data = $reader->data;
}
$data =~ /^\)/ or $self->parser_error("No closing bracket in notation section", $reader);
$reader->move_along(1);
$model .= ')';
return $model;
}
sub Enumeration {
my ($self, $reader) = @_;
return unless $reader->match('(');
$self->skip_whitespace($reader);
my $model = '(';
my $nmtoken = $self->Nmtoken($reader) ||
$self->parser_error("No Nmtoken in enumerated declaration", $reader);
$model .= $nmtoken;
$self->skip_whitespace($reader);
my $data = $reader->data;
while ($data =~ /^\|/) {
$model .= '|';
$reader->move_along(1);
$self->skip_whitespace($reader);
my $nmtoken = $self->Nmtoken($reader) ||
$self->parser_error("No Nmtoken in enumerated declaration", $reader);
$model .= $nmtoken;
$self->skip_whitespace($reader);
$data = $reader->data;
}
$data =~ /^\)/ or $self->parser_error("No closing bracket in enumerated declaration", $reader);
$reader->move_along(1);
$model .= ')';
return $model;
}
sub Nmtoken {
my ($self, $reader) = @_;
return $self->Name($reader);
}
sub DefaultDecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
if ($data =~ /^(\#REQUIRED|\#IMPLIED)/) {
$reader->move_along(length($1));
return $1;
}
my $model = '';
if ($data =~ /^\#FIXED/) {
$reader->move_along(6);
$self->skip_whitespace($reader) || $self->parser_error(
"no whitespace after FIXED specifier", $reader);
my $value = $self->AttValue($reader);
return "#FIXED", $value;
}
my $value = $self->AttValue($reader);
return undef, $value;
}
sub EntityDecl {
my ($self, $reader) = @_;
my $data = $reader->data(8);
return 0 unless $data =~ /^<!ENTITY/;
$reader->move_along(8);
$self->skip_whitespace($reader) || $self->parser_error(
"No whitespace after ENTITY declaration", $reader);
$self->PEDecl($reader) || $self->GEDecl($reader);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("No closing '>' in entity definition", $reader);
return 1;
}
sub GEDecl {
my ($self, $reader) = @_;
my $name = $self->Name($reader) || $self->parser_error("No entity name given", $reader);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after entity name", $reader);
# TODO: ExternalID calls lexhandler method. Wrong place for it.
my $value;
if ($value = $self->ExternalID($reader)) {
$value .= $self->NDataDecl($reader);
}
else {
$value = $self->EntityValue($reader);
}
if ($self->{ParseOptions}{entities}{$name}) {
warn("entity $name already exists\n");
} else {
$self->{ParseOptions}{entities}{$name} = 1;
$self->{ParseOptions}{expanded_entity}{$name} = $value; # ???
}
# do callback?
return 1;
}
sub PEDecl {
my ($self, $reader) = @_;
return 0 unless $reader->match('%');
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity marker", $reader);
my $name = $self->Name($reader) || $self->parser_error("No parameter entity name given", $reader);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity name", $reader);
my $value = $self->ExternalID($reader) ||
$self->EntityValue($reader) ||
$self->parser_error("PE is not a value or an external resource", $reader);
# do callback?
return 1;
}
my $quotre = qr/[^%&\"]/;
my $aposre = qr/[^%&\']/;
sub EntityValue {
my ($self, $reader) = @_;
my $data = $reader->data;
my $quote = '"';
my $re = $quotre;
if ($data !~ /^"/) {
$data =~ /^'/ or $self->parser_error("Not a quote character", $reader);
$quote = "'";
$re = $aposre;
}
$reader->move_along(1);
my $value = '';
while (1) {
my $data = $reader->data;
$self->parser_error("EOF found while reading entity value", $reader)
unless length($data);
if ($data =~ /^($re+)/) {
my $match = $1;
$value .= $match;
$reader->move_along(length($match));
}
elsif ($reader->match('&')) {
# if it's a char ref, expand now:
if ($reader->match('#')) {
my $char;
my $ref = '';
if ($reader->match('x')) {
my $data = $reader->data;
while (1) {
$self->parser_error("EOF looking for reference end", $reader)
unless length($data);
if ($data !~ /^([0-9a-fA-F]*)/) {
last;
}
$ref .= $1;
$reader->move_along(length($1));
if (length($1) == length($data)) {
$data = $reader->data;
}
else {
last;
}
}
$char = chr_ref(hex($ref));
$ref = "x$ref";
}
else {
my $data = $reader->data;
while (1) {
$self->parser_error("EOF looking for reference end", $reader)
unless length($data);
if ($data !~ /^([0-9]*)/) {
last;
}
$ref .= $1;
$reader->move_along(length($1));
if (length($1) == length($data)) {
$data = $reader->data;
}
else {
last;
}
}
$char = chr($ref);
}
$reader->match(';') ||
$self->parser_error("No semi-colon found after character reference", $reader);
if ($char !~ $SingleChar) { # match a single character
$self->parser_error("Character reference '&#$ref;' refers to an illegal XML character ($char)", $reader);
}
$value .= $char;
}
else {
# entity refs in entities get expanded later, so don't parse now.
$value .= '&';
}
}
elsif ($reader->match('%')) {
$value .= $self->PEReference($reader);
}
elsif ($reader->match($quote)) {
# end of attrib
last;
}
else {
$self->parser_error("Invalid character in attribute value: " . substr($reader->data, 0, 1), $reader);
}
}
return $value;
}
sub NDataDecl {
my ($self, $reader) = @_;
$self->skip_whitespace($reader) || return '';
my $data = $reader->data(5);
return '' unless $data =~ /^NDATA/;
$reader->move_along(5);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after NDATA declaration", $reader);
my $name = $self->Name($reader) || $self->parser_error("NDATA declaration lacks a proper Name", $reader);
return " NDATA $name";
}
sub NotationDecl {
my ($self, $reader) = @_;
my $data = $reader->data(10);
return 0 unless $data =~ /^<!NOTATION/;
$reader->move_along(10);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after NOTATION declaration", $reader);
$data = $reader->data;
my $value = '';
while(1) {
$self->parser_error("EOF found while looking for end of NotationDecl", $reader)
unless length($data);
if ($data =~ /^([^>]*)>/) {
$value .= $1;
$reader->move_along(length($1) + 1);
$self->notation_decl({Name => "FIXME", SystemId => "FIXME", PublicId => "FIXME" });
last;
}
else {
$value .= $data;
$reader->move_along(length($data));
$data = $reader->data;
}
}
return 1;
}
1;

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# $Id$
package XML::SAX::PurePerl::DebugHandler;
use strict;
sub new {
my $class = shift;
my %opts = @_;
return bless \%opts, $class;
}
# DocumentHandler
sub set_document_locator {
my $self = shift;
print "set_document_locator\n" if $ENV{DEBUG_XML};
$self->{seen}{set_document_locator}++;
}
sub start_document {
my $self = shift;
print "start_document\n" if $ENV{DEBUG_XML};
$self->{seen}{start_document}++;
}
sub end_document {
my $self = shift;
print "end_document\n" if $ENV{DEBUG_XML};
$self->{seen}{end_document}++;
}
sub start_element {
my $self = shift;
print "start_element\n" if $ENV{DEBUG_XML};
$self->{seen}{start_element}++;
}
sub end_element {
my $self = shift;
print "end_element\n" if $ENV{DEBUG_XML};
$self->{seen}{end_element}++;
}
sub characters {
my $self = shift;
print "characters\n" if $ENV{DEBUG_XML};
# warn "Char: ", $_[0]->{Data}, "\n";
$self->{seen}{characters}++;
}
sub processing_instruction {
my $self = shift;
print "processing_instruction\n" if $ENV{DEBUG_XML};
$self->{seen}{processing_instruction}++;
}
sub ignorable_whitespace {
my $self = shift;
print "ignorable_whitespace\n" if $ENV{DEBUG_XML};
$self->{seen}{ignorable_whitespace}++;
}
# LexHandler
sub comment {
my $self = shift;
print "comment\n" if $ENV{DEBUG_XML};
$self->{seen}{comment}++;
}
# DTDHandler
sub notation_decl {
my $self = shift;
print "notation_decl\n" if $ENV{DEBUG_XML};
$self->{seen}{notation_decl}++;
}
sub unparsed_entity_decl {
my $self = shift;
print "unparsed_entity_decl\n" if $ENV{DEBUG_XML};
$self->{seen}{entity_decl}++;
}
# EntityResolver
sub resolve_entity {
my $self = shift;
print "resolve_entity\n" if $ENV{DEBUG_XML};
$self->{seen}{resolve_entity}++;
return '';
}
1;

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# $Id$
package XML::SAX::PurePerl;
use strict;
use XML::SAX::PurePerl::Productions qw($PubidChar);
sub doctypedecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
if ($data =~ /^<!DOCTYPE/) {
$reader->move_along(9);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after doctype declaration", $reader);
my $root_name = $self->Name($reader) ||
$self->parser_error("Doctype declaration has no root element name", $reader);
if ($self->skip_whitespace($reader)) {
# might be externalid...
my %dtd = $self->ExternalID($reader);
# TODO: Call SAX event
}
$self->skip_whitespace($reader);
$self->InternalSubset($reader);
$reader->match('>') or $self->parser_error("Doctype not closed", $reader);
return 1;
}
return 0;
}
sub ExternalID {
my ($self, $reader) = @_;
my $data = $reader->data(6);
if ($data =~ /^SYSTEM/) {
$reader->move_along(6);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after SYSTEM identifier", $reader);
return (SYSTEM => $self->SystemLiteral($reader));
}
elsif ($data =~ /^PUBLIC/) {
$reader->move_along(6);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after PUBLIC identifier", $reader);
my $quote = $self->quote($reader) ||
$self->parser_error("Not a quote character in PUBLIC identifier", $reader);
my $data = $reader->data;
my $pubid = '';
while(1) {
$self->parser_error("EOF while looking for end of PUBLIC identifiier", $reader)
unless length($data);
if ($data =~ /^([^$quote]*)$quote/) {
$pubid .= $1;
$reader->move_along(length($1) + 1);
last;
}
else {
$pubid .= $data;
$reader->move_along(length($data));
$data = $reader->data;
}
}
if ($pubid !~ /^($PubidChar)+$/) {
$self->parser_error("Invalid characters in PUBLIC identifier", $reader);
}
$self->skip_whitespace($reader) ||
$self->parser_error("Not whitespace after PUBLIC ID in DOCTYPE", $reader);
return (PUBLIC => $pubid,
SYSTEM => $self->SystemLiteral($reader));
}
else {
return;
}
return 1;
}
sub SystemLiteral {
my ($self, $reader) = @_;
my $quote = $self->quote($reader);
my $data = $reader->data;
my $systemid = '';
while (1) {
$self->parser_error("EOF found while looking for end of System Literal", $reader)
unless length($data);
if ($data =~ /^([^$quote]*)$quote/) {
$systemid .= $1;
$reader->move_along(length($1) + 1);
return $systemid;
}
else {
$systemid .= $data;
$reader->move_along(length($data));
$data = $reader->data;
}
}
}
sub InternalSubset {
my ($self, $reader) = @_;
return 0 unless $reader->match('[');
1 while $self->IntSubsetDecl($reader);
$reader->match(']') or $self->parser_error("No close bracket on internal subset (found: " . $reader->data, $reader);
$self->skip_whitespace($reader);
return 1;
}
sub IntSubsetDecl {
my ($self, $reader) = @_;
return $self->DeclSep($reader) || $self->markupdecl($reader);
}
sub DeclSep {
my ($self, $reader) = @_;
if ($self->skip_whitespace($reader)) {
return 1;
}
if ($self->PEReference($reader)) {
return 1;
}
# if ($self->ParsedExtSubset($reader)) {
# return 1;
# }
return 0;
}
sub PEReference {
my ($self, $reader) = @_;
return 0 unless $reader->match('%');
my $peref = $self->Name($reader) ||
$self->parser_error("PEReference did not find a Name", $reader);
# TODO - load/parse the peref
$reader->match(';') or $self->parser_error("Invalid token in PEReference", $reader);
return 1;
}
sub markupdecl {
my ($self, $reader) = @_;
if ($self->elementdecl($reader) ||
$self->AttlistDecl($reader) ||
$self->EntityDecl($reader) ||
$self->NotationDecl($reader) ||
$self->PI($reader) ||
$self->Comment($reader))
{
return 1;
}
return 0;
}
1;

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# $Id$
package XML::SAX::PurePerl; # NB, not ::EncodingDetect!
use strict;
sub encoding_detect {
my ($parser, $reader) = @_;
my $error = "Invalid byte sequence at start of file";
my $data = $reader->data;
if ($data =~ /^\x00\x00\xFE\xFF/) {
# BO-UCS4-be
$reader->move_along(4);
$reader->set_encoding('UCS-4BE');
return;
}
elsif ($data =~ /^\x00\x00\xFF\xFE/) {
# BO-UCS-4-2143
$reader->move_along(4);
$reader->set_encoding('UCS-4-2143');
return;
}
elsif ($data =~ /^\x00\x00\x00\x3C/) {
$reader->set_encoding('UCS-4BE');
return;
}
elsif ($data =~ /^\x00\x00\x3C\x00/) {
$reader->set_encoding('UCS-4-2143');
return;
}
elsif ($data =~ /^\x00\x3C\x00\x00/) {
$reader->set_encoding('UCS-4-3412');
return;
}
elsif ($data =~ /^\x00\x3C\x00\x3F/) {
$reader->set_encoding('UTF-16BE');
return;
}
elsif ($data =~ /^\xFF\xFE\x00\x00/) {
# BO-UCS-4LE
$reader->move_along(4);
$reader->set_encoding('UCS-4LE');
return;
}
elsif ($data =~ /^\xFF\xFE/) {
$reader->move_along(2);
$reader->set_encoding('UTF-16LE');
return;
}
elsif ($data =~ /^\xFE\xFF\x00\x00/) {
$reader->move_along(4);
$reader->set_encoding('UCS-4-3412');
return;
}
elsif ($data =~ /^\xFE\xFF/) {
$reader->move_along(2);
$reader->set_encoding('UTF-16BE');
return;
}
elsif ($data =~ /^\xEF\xBB\xBF/) { # UTF-8 BOM
$reader->move_along(3);
$reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^\x3C\x00\x00\x00/) {
$reader->set_encoding('UCS-4LE');
return;
}
elsif ($data =~ /^\x3C\x00\x3F\x00/) {
$reader->set_encoding('UTF-16LE');
return;
}
elsif ($data =~ /^\x3C\x3F\x78\x6D/) {
# $reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^\x3C\x3F\x78/) {
# $reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^\x3C\x3F/) {
# $reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^\x3C/) {
# $reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^[\x20\x09\x0A\x0D]+\x3C[^\x3F]/) {
# $reader->set_encoding('UTF-8');
return;
}
elsif ($data =~ /^\x4C\x6F\xA7\x94/) {
$reader->set_encoding('EBCDIC');
return;
}
warn("Unable to recognise encoding of this document");
return;
}
1;

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# $Id$
package XML::SAX::PurePerl::Exception;
use strict;
use overload '""' => "stringify";
use vars qw/$StackTrace/;
$StackTrace = $ENV{XML_DEBUG} || 0;
sub throw {
my $class = shift;
die $class->new(@_);
}
sub new {
my $class = shift;
my %opts = @_;
die "Invalid options" unless exists $opts{Message};
if ($opts{reader}) {
return bless { Message => $opts{Message},
Exception => undef, # not sure what this is for!!!
ColumnNumber => $opts{reader}->column,
LineNumber => $opts{reader}->line,
PublicId => $opts{reader}->public_id,
SystemId => $opts{reader}->system_id,
$StackTrace ? (StackTrace => stacktrace()) : (),
}, $class;
}
return bless { Message => $opts{Message},
Exception => undef, # not sure what this is for!!!
}, $class;
}
sub stringify {
my $self = shift;
local $^W;
return $self->{Message} . " [Ln: " . $self->{LineNumber} .
", Col: " . $self->{ColumnNumber} . "]" .
($StackTrace ? stackstring($self->{StackTrace}) : "") . "\n";
}
sub stacktrace {
my $i = 2;
my @fulltrace;
while (my @trace = caller($i++)) {
my %hash;
@hash{qw(Package Filename Line)} = @trace[0..2];
push @fulltrace, \%hash;
}
return \@fulltrace;
}
sub stackstring {
my $stacktrace = shift;
my $string = "\nFrom:\n";
foreach my $current (@$stacktrace) {
$string .= $current->{Filename} . " Line: " . $current->{Line} . "\n";
}
return $string;
}
1;

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# $Id$
package XML::SAX::PurePerl;
use strict;
sub chr_ref {
my $n = shift;
if ($n < 0x80) {
return chr ($n);
}
elsif ($n < 0x800) {
return pack ("CC", (($n >> 6) | 0xc0), (($n & 0x3f) | 0x80));
}
elsif ($n < 0x10000) {
return pack ("CCC", (($n >> 12) | 0xe0), ((($n >> 6) & 0x3f) | 0x80),
(($n & 0x3f) | 0x80));
}
elsif ($n < 0x110000)
{
return pack ("CCCC", (($n >> 18) | 0xf0), ((($n >> 12) & 0x3f) | 0x80),
((($n >> 6) & 0x3f) | 0x80), (($n & 0x3f) | 0x80));
}
else {
return undef;
}
}
1;

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# $Id$
package XML::SAX::PurePerl::Productions;
use Exporter;
@ISA = ('Exporter');
@EXPORT_OK = qw($S $Char $VersionNum $BaseChar $Ideographic
$Extender $Digit $CombiningChar $EncNameStart $EncNameEnd $NameChar $CharMinusDash
$PubidChar $Any $SingleChar);
### WARNING!!! All productions here must *only* match a *single* character!!! ###
BEGIN {
$S = qr/[\x20\x09\x0D\x0A]/;
$CharMinusDash = qr/[^-]/x;
$Any = qr/ . /xms;
$VersionNum = qr/ [a-zA-Z0-9_.:-]+ /x;
$EncNameStart = qr/ [A-Za-z] /x;
$EncNameEnd = qr/ [A-Za-z0-9\._-] /x;
$PubidChar = qr/ [\x20\x0D\x0Aa-zA-Z0-9'()\+,.\/:=\?;!*\#@\$_\%-] /x;
if ($] < 5.006) {
eval <<' PERL';
$Char = qr/^ [\x09\x0A\x0D\x20-\x7F]|([\xC0-\xFD][\x80-\xBF]+) $/x;
$SingleChar = qr/^$Char$/;
$BaseChar = qr/ [\x41-\x5A\x61-\x7A]|([\xC0-\xFD][\x80-\xBF]+) /x;
$Extender = qr/ \xB7 /x;
$Digit = qr/ [\x30-\x39] /x;
# can't do this one without unicode
# $CombiningChar = qr/^$/msx;
$NameChar = qr/^ (?: $BaseChar | $Digit | [._:-] | $Extender )+ $/x;
PERL
die $@ if $@;
}
else {
eval <<' PERL';
use utf8; # for 5.6
$Char = qr/^ [\x09\x0A\x0D\x{0020}-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}] $/x;
$SingleChar = qr/^$Char$/;
$BaseChar = qr/
[\x{0041}-\x{005A}\x{0061}-\x{007A}\x{00C0}-\x{00D6}\x{00D8}-\x{00F6}] |
[\x{00F8}-\x{00FF}\x{0100}-\x{0131}\x{0134}-\x{013E}\x{0141}-\x{0148}] |
[\x{014A}-\x{017E}\x{0180}-\x{01C3}\x{01CD}-\x{01F0}\x{01F4}-\x{01F5}] |
[\x{01FA}-\x{0217}\x{0250}-\x{02A8}\x{02BB}-\x{02C1}\x{0386}\x{0388}-\x{038A}] |
[\x{038C}\x{038E}-\x{03A1}\x{03A3}-\x{03CE}\x{03D0}-\x{03D6}\x{03DA}] |
[\x{03DC}\x{03DE}\x{03E0}\x{03E2}-\x{03F3}\x{0401}-\x{040C}\x{040E}-\x{044F}] |
[\x{0451}-\x{045C}\x{045E}-\x{0481}\x{0490}-\x{04C4}\x{04C7}-\x{04C8}] |
[\x{04CB}-\x{04CC}\x{04D0}-\x{04EB}\x{04EE}-\x{04F5}\x{04F8}-\x{04F9}] |
[\x{0531}-\x{0556}\x{0559}\x{0561}-\x{0586}\x{05D0}-\x{05EA}\x{05F0}-\x{05F2}] |
[\x{0621}-\x{063A}\x{0641}-\x{064A}\x{0671}-\x{06B7}\x{06BA}-\x{06BE}] |
[\x{06C0}-\x{06CE}\x{06D0}-\x{06D3}\x{06D5}\x{06E5}-\x{06E6}\x{0905}-\x{0939}] |
[\x{093D}\x{0958}-\x{0961}\x{0985}-\x{098C}\x{098F}-\x{0990}] |
[\x{0993}-\x{09A8}\x{09AA}-\x{09B0}\x{09B2}\x{09B6}-\x{09B9}\x{09DC}-\x{09DD}] |
[\x{09DF}-\x{09E1}\x{09F0}-\x{09F1}\x{0A05}-\x{0A0A}\x{0A0F}-\x{0A10}] |
[\x{0A13}-\x{0A28}\x{0A2A}-\x{0A30}\x{0A32}-\x{0A33}\x{0A35}-\x{0A36}] |
[\x{0A38}-\x{0A39}\x{0A59}-\x{0A5C}\x{0A5E}\x{0A72}-\x{0A74}\x{0A85}-\x{0A8B}] |
[\x{0A8D}\x{0A8F}-\x{0A91}\x{0A93}-\x{0AA8}\x{0AAA}-\x{0AB0}] |
[\x{0AB2}-\x{0AB3}\x{0AB5}-\x{0AB9}\x{0ABD}\x{0AE0}\x{0B05}-\x{0B0C}] |
[\x{0B0F}-\x{0B10}\x{0B13}-\x{0B28}\x{0B2A}-\x{0B30}\x{0B32}-\x{0B33}] |
[\x{0B36}-\x{0B39}\x{0B3D}\x{0B5C}-\x{0B5D}\x{0B5F}-\x{0B61}\x{0B85}-\x{0B8A}] |
[\x{0B8E}-\x{0B90}\x{0B92}-\x{0B95}\x{0B99}-\x{0B9A}\x{0B9C}] |
[\x{0B9E}-\x{0B9F}\x{0BA3}-\x{0BA4}\x{0BA8}-\x{0BAA}\x{0BAE}-\x{0BB5}] |
[\x{0BB7}-\x{0BB9}\x{0C05}-\x{0C0C}\x{0C0E}-\x{0C10}\x{0C12}-\x{0C28}] |
[\x{0C2A}-\x{0C33}\x{0C35}-\x{0C39}\x{0C60}-\x{0C61}\x{0C85}-\x{0C8C}] |
[\x{0C8E}-\x{0C90}\x{0C92}-\x{0CA8}\x{0CAA}-\x{0CB3}\x{0CB5}-\x{0CB9}\x{0CDE}] |
[\x{0CE0}-\x{0CE1}\x{0D05}-\x{0D0C}\x{0D0E}-\x{0D10}\x{0D12}-\x{0D28}] |
[\x{0D2A}-\x{0D39}\x{0D60}-\x{0D61}\x{0E01}-\x{0E2E}\x{0E30}\x{0E32}-\x{0E33}] |
[\x{0E40}-\x{0E45}\x{0E81}-\x{0E82}\x{0E84}\x{0E87}-\x{0E88}\x{0E8A}] |
[\x{0E8D}\x{0E94}-\x{0E97}\x{0E99}-\x{0E9F}\x{0EA1}-\x{0EA3}\x{0EA5}\x{0EA7}] |
[\x{0EAA}-\x{0EAB}\x{0EAD}-\x{0EAE}\x{0EB0}\x{0EB2}-\x{0EB3}\x{0EBD}] |
[\x{0EC0}-\x{0EC4}\x{0F40}-\x{0F47}\x{0F49}-\x{0F69}\x{10A0}-\x{10C5}] |
[\x{10D0}-\x{10F6}\x{1100}\x{1102}-\x{1103}\x{1105}-\x{1107}\x{1109}] |
[\x{110B}-\x{110C}\x{110E}-\x{1112}\x{113C}\x{113E}\x{1140}\x{114C}\x{114E}] |
[\x{1150}\x{1154}-\x{1155}\x{1159}\x{115F}-\x{1161}\x{1163}\x{1165}] |
[\x{1167}\x{1169}\x{116D}-\x{116E}\x{1172}-\x{1173}\x{1175}\x{119E}\x{11A8}] |
[\x{11AB}\x{11AE}-\x{11AF}\x{11B7}-\x{11B8}\x{11BA}\x{11BC}-\x{11C2}] |
[\x{11EB}\x{11F0}\x{11F9}\x{1E00}-\x{1E9B}\x{1EA0}-\x{1EF9}\x{1F00}-\x{1F15}] |
[\x{1F18}-\x{1F1D}\x{1F20}-\x{1F45}\x{1F48}-\x{1F4D}\x{1F50}-\x{1F57}] |
[\x{1F59}\x{1F5B}\x{1F5D}\x{1F5F}-\x{1F7D}\x{1F80}-\x{1FB4}\x{1FB6}-\x{1FBC}] |
[\x{1FBE}\x{1FC2}-\x{1FC4}\x{1FC6}-\x{1FCC}\x{1FD0}-\x{1FD3}] |
[\x{1FD6}-\x{1FDB}\x{1FE0}-\x{1FEC}\x{1FF2}-\x{1FF4}\x{1FF6}-\x{1FFC}] |
[\x{2126}\x{212A}-\x{212B}\x{212E}\x{2180}-\x{2182}\x{3041}-\x{3094}] |
[\x{30A1}-\x{30FA}\x{3105}-\x{312C}\x{AC00}-\x{D7A3}]
/x;
$Extender = qr/
[\x{00B7}\x{02D0}\x{02D1}\x{0387}\x{0640}\x{0E46}\x{0EC6}\x{3005}\x{3031}-\x{3035}\x{309D}-\x{309E}\x{30FC}-\x{30FE}]
/x;
$Digit = qr/
[\x{0030}-\x{0039}\x{0660}-\x{0669}\x{06F0}-\x{06F9}\x{0966}-\x{096F}] |
[\x{09E6}-\x{09EF}\x{0A66}-\x{0A6F}\x{0AE6}-\x{0AEF}\x{0B66}-\x{0B6F}] |
[\x{0BE7}-\x{0BEF}\x{0C66}-\x{0C6F}\x{0CE6}-\x{0CEF}\x{0D66}-\x{0D6F}] |
[\x{0E50}-\x{0E59}\x{0ED0}-\x{0ED9}\x{0F20}-\x{0F29}]
/x;
$CombiningChar = qr/
[\x{0300}-\x{0345}\x{0360}-\x{0361}\x{0483}-\x{0486}\x{0591}-\x{05A1}] |
[\x{05A3}-\x{05B9}\x{05BB}-\x{05BD}\x{05BF}\x{05C1}-\x{05C2}\x{05C4}] |
[\x{064B}-\x{0652}\x{0670}\x{06D6}-\x{06DC}\x{06DD}-\x{06DF}\x{06E0}-\x{06E4}] |
[\x{06E7}-\x{06E8}\x{06EA}-\x{06ED}\x{0901}-\x{0903}\x{093C}] |
[\x{093E}-\x{094C}\x{094D}\x{0951}-\x{0954}\x{0962}-\x{0963}\x{0981}-\x{0983}] |
[\x{09BC}\x{09BE}\x{09BF}\x{09C0}-\x{09C4}\x{09C7}-\x{09C8}] |
[\x{09CB}-\x{09CD}\x{09D7}\x{09E2}-\x{09E3}\x{0A02}\x{0A3C}\x{0A3E}\x{0A3F}] |
[\x{0A40}-\x{0A42}\x{0A47}-\x{0A48}\x{0A4B}-\x{0A4D}\x{0A70}-\x{0A71}] |
[\x{0A81}-\x{0A83}\x{0ABC}\x{0ABE}-\x{0AC5}\x{0AC7}-\x{0AC9}\x{0ACB}-\x{0ACD}] |
[\x{0B01}-\x{0B03}\x{0B3C}\x{0B3E}-\x{0B43}\x{0B47}-\x{0B48}] |
[\x{0B4B}-\x{0B4D}\x{0B56}-\x{0B57}\x{0B82}-\x{0B83}\x{0BBE}-\x{0BC2}] |
[\x{0BC6}-\x{0BC8}\x{0BCA}-\x{0BCD}\x{0BD7}\x{0C01}-\x{0C03}\x{0C3E}-\x{0C44}] |
[\x{0C46}-\x{0C48}\x{0C4A}-\x{0C4D}\x{0C55}-\x{0C56}\x{0C82}-\x{0C83}] |
[\x{0CBE}-\x{0CC4}\x{0CC6}-\x{0CC8}\x{0CCA}-\x{0CCD}\x{0CD5}-\x{0CD6}] |
[\x{0D02}-\x{0D03}\x{0D3E}-\x{0D43}\x{0D46}-\x{0D48}\x{0D4A}-\x{0D4D}\x{0D57}] |
[\x{0E31}\x{0E34}-\x{0E3A}\x{0E47}-\x{0E4E}\x{0EB1}\x{0EB4}-\x{0EB9}] |
[\x{0EBB}-\x{0EBC}\x{0EC8}-\x{0ECD}\x{0F18}-\x{0F19}\x{0F35}\x{0F37}\x{0F39}] |
[\x{0F3E}\x{0F3F}\x{0F71}-\x{0F84}\x{0F86}-\x{0F8B}\x{0F90}-\x{0F95}] |
[\x{0F97}\x{0F99}-\x{0FAD}\x{0FB1}-\x{0FB7}\x{0FB9}\x{20D0}-\x{20DC}\x{20E1}] |
[\x{302A}-\x{302F}\x{3099}\x{309A}]
/x;
$Ideographic = qr/
[\x{4E00}-\x{9FA5}\x{3007}\x{3021}-\x{3029}]
/x;
$NameChar = qr/^ (?: $BaseChar | $Ideographic | $Digit | [._:-] | $CombiningChar | $Extender )+ $/x;
PERL
die $@ if $@;
}
}
1;

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# $Id$
package XML::SAX::PurePerl::Reader;
use strict;
use XML::SAX::PurePerl::Reader::URI;
use Exporter ();
use vars qw(@ISA @EXPORT_OK);
@ISA = qw(Exporter);
@EXPORT_OK = qw(
EOF
BUFFER
LINE
COLUMN
ENCODING
XML_VERSION
);
use constant EOF => 0;
use constant BUFFER => 1;
use constant LINE => 2;
use constant COLUMN => 3;
use constant ENCODING => 4;
use constant SYSTEM_ID => 5;
use constant PUBLIC_ID => 6;
use constant XML_VERSION => 7;
require XML::SAX::PurePerl::Reader::Stream;
require XML::SAX::PurePerl::Reader::String;
if ($] >= 5.007002) {
require XML::SAX::PurePerl::Reader::UnicodeExt;
}
else {
require XML::SAX::PurePerl::Reader::NoUnicodeExt;
}
sub new {
my $class = shift;
my $thing = shift;
# try to figure if this $thing is a handle of some sort
if (ref($thing) && UNIVERSAL::isa($thing, 'IO::Handle')) {
return XML::SAX::PurePerl::Reader::Stream->new($thing)->init;
}
my $ioref;
if (tied($thing)) {
my $class = ref($thing);
no strict 'refs';
$ioref = $thing if defined &{"${class}::TIEHANDLE"};
}
else {
eval {
$ioref = *{$thing}{IO};
};
undef $@;
}
if ($ioref) {
return XML::SAX::PurePerl::Reader::Stream->new($thing)->init;
}
if ($thing =~ /</) {
# assume it's a string
return XML::SAX::PurePerl::Reader::String->new($thing)->init;
}
# assume it is a uri
return XML::SAX::PurePerl::Reader::URI->new($thing)->init;
}
sub init {
my $self = shift;
$self->[LINE] = 1;
$self->[COLUMN] = 1;
$self->read_more;
return $self;
}
sub data {
my ($self, $min_length) = (@_, 1);
if (length($self->[BUFFER]) < $min_length) {
$self->read_more;
}
return $self->[BUFFER];
}
sub match {
my ($self, $char) = @_;
my $data = $self->data;
if (substr($data, 0, 1) eq $char) {
$self->move_along(1);
return 1;
}
return 0;
}
sub public_id {
my $self = shift;
@_ and $self->[PUBLIC_ID] = shift;
$self->[PUBLIC_ID];
}
sub system_id {
my $self = shift;
@_ and $self->[SYSTEM_ID] = shift;
$self->[SYSTEM_ID];
}
sub line {
shift->[LINE];
}
sub column {
shift->[COLUMN];
}
sub get_encoding {
my $self = shift;
return $self->[ENCODING];
}
sub get_xml_version {
my $self = shift;
return $self->[XML_VERSION];
}
1;
__END__
=head1 NAME
XML::Parser::PurePerl::Reader - Abstract Reader factory class
=cut

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# $Id$
package XML::SAX::PurePerl::Reader;
use strict;
sub set_raw_stream {
# no-op
}
sub switch_encoding_stream {
my ($fh, $encoding) = @_;
throw XML::SAX::Exception::Parse (
Message => "Only ASCII encoding allowed without perl 5.7.2 or higher. You tried: $encoding",
) if $encoding !~ /(ASCII|UTF\-?8)/i;
}
sub switch_encoding_string {
my (undef, $encoding) = @_;
throw XML::SAX::Exception::Parse (
Message => "Only ASCII encoding allowed without perl 5.7.2 or higher. You tried: $encoding",
) if $encoding !~ /(ASCII|UTF\-?8)/i;
}
1;

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# $Id$
package XML::SAX::PurePerl::Reader::Stream;
use strict;
use vars qw(@ISA);
use XML::SAX::PurePerl::Reader qw(
EOF
BUFFER
LINE
COLUMN
ENCODING
XML_VERSION
);
use XML::SAX::Exception;
@ISA = ('XML::SAX::PurePerl::Reader');
# subclassed by adding 1 to last element
use constant FH => 8;
use constant BUFFER_SIZE => 4096;
sub new {
my $class = shift;
my $ioref = shift;
XML::SAX::PurePerl::Reader::set_raw_stream($ioref);
my @parts;
@parts[FH, LINE, COLUMN, BUFFER, EOF, XML_VERSION] =
($ioref, 1, 0, '', 0, '1.0');
return bless \@parts, $class;
}
sub read_more {
my $self = shift;
my $buf;
my $bytesread = read($self->[FH], $buf, BUFFER_SIZE);
if ($bytesread) {
$self->[BUFFER] .= $buf;
return 1;
}
elsif (defined($bytesread)) {
$self->[EOF]++;
return 0;
}
else {
throw XML::SAX::Exception::Parse(
Message => "Error reading from filehandle: $!",
);
}
}
sub move_along {
my $self = shift;
my $discarded = substr($self->[BUFFER], 0, $_[0], '');
# Wish I could skip this lot - tells us where we are in the file
my $lines = $discarded =~ tr/\n//;
$self->[LINE] += $lines;
if ($lines) {
$discarded =~ /\n([^\n]*)$/;
$self->[COLUMN] = length($1);
}
else {
$self->[COLUMN] += $_[0];
}
}
sub set_encoding {
my $self = shift;
my ($encoding) = @_;
# warn("set encoding to: $encoding\n");
XML::SAX::PurePerl::Reader::switch_encoding_stream($self->[FH], $encoding);
XML::SAX::PurePerl::Reader::switch_encoding_string($self->[BUFFER], $encoding);
$self->[ENCODING] = $encoding;
}
sub bytepos {
my $self = shift;
tell($self->[FH]);
}
1;

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# $Id$
package XML::SAX::PurePerl::Reader::String;
use strict;
use vars qw(@ISA);
use XML::SAX::PurePerl::Reader qw(
LINE
COLUMN
BUFFER
ENCODING
EOF
);
@ISA = ('XML::SAX::PurePerl::Reader');
use constant DISCARDED => 8;
use constant STRING => 9;
use constant USED => 10;
use constant CHUNK_SIZE => 2048;
sub new {
my $class = shift;
my $string = shift;
my @parts;
@parts[BUFFER, EOF, LINE, COLUMN, DISCARDED, STRING, USED] =
('', 0, 1, 0, 0, $string, 0);
return bless \@parts, $class;
}
sub read_more () {
my $self = shift;
if ($self->[USED] >= length($self->[STRING])) {
$self->[EOF]++;
return 0;
}
my $bytes = CHUNK_SIZE;
if ($bytes > (length($self->[STRING]) - $self->[USED])) {
$bytes = (length($self->[STRING]) - $self->[USED]);
}
$self->[BUFFER] .= substr($self->[STRING], $self->[USED], $bytes);
$self->[USED] += $bytes;
return 1;
}
sub move_along {
my($self, $bytes) = @_;
my $discarded = substr($self->[BUFFER], 0, $bytes, '');
$self->[DISCARDED] += length($discarded);
# Wish I could skip this lot - tells us where we are in the file
my $lines = $discarded =~ tr/\n//;
$self->[LINE] += $lines;
if ($lines) {
$discarded =~ /\n([^\n]*)$/;
$self->[COLUMN] = length($1);
}
else {
$self->[COLUMN] += $_[0];
}
}
sub set_encoding {
my $self = shift;
my ($encoding) = @_;
XML::SAX::PurePerl::Reader::switch_encoding_string($self->[BUFFER], $encoding, "utf-8");
$self->[ENCODING] = $encoding;
}
sub bytepos {
my $self = shift;
$self->[DISCARDED];
}
1;

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# $Id$
package XML::SAX::PurePerl::Reader::URI;
use strict;
use XML::SAX::PurePerl::Reader;
use File::Temp qw(tempfile);
use Symbol;
## NOTE: This is *not* a subclass of Reader. It just returns Stream or String
## Reader objects depending on what it's capabilities are.
sub new {
my $class = shift;
my $uri = shift;
# request the URI
if (-e $uri && -f _) {
my $fh = gensym;
open($fh, $uri) || die "Cannot open file $uri : $!";
return XML::SAX::PurePerl::Reader::Stream->new($fh);
}
elsif ($uri =~ /^file:(.*)$/ && -e $1 && -f _) {
my $file = $1;
my $fh = gensym;
open($fh, $file) || die "Cannot open file $file : $!";
return XML::SAX::PurePerl::Reader::Stream->new($fh);
}
else {
# request URI, return String reader
require LWP::UserAgent;
my $ua = LWP::UserAgent->new;
$ua->agent("Perl/XML/SAX/PurePerl/1.0 " . $ua->agent);
my $req = HTTP::Request->new(GET => $uri);
my $fh = tempfile();
my $callback = sub {
my ($data, $response, $protocol) = @_;
print $fh $data;
};
my $res = $ua->request($req, $callback, 4096);
if ($res->is_success) {
seek($fh, 0, 0);
return XML::SAX::PurePerl::Reader::Stream->new($fh);
}
else {
die "LWP Request Failed";
}
}
}
1;

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# $Id$
package XML::SAX::PurePerl::Reader;
use strict;
use Encode ();
sub set_raw_stream {
my ($fh) = @_;
binmode($fh, ":bytes");
}
sub switch_encoding_stream {
my ($fh, $encoding) = @_;
binmode($fh, ":encoding($encoding)");
}
sub switch_encoding_string {
$_[0] = Encode::decode($_[1], $_[0]);
}
1;

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# $Id$
package XML::SAX::PurePerl;
use strict;
no warnings 'utf8';
sub chr_ref {
return chr(shift);
}
if ($] >= 5.007002) {
require Encode;
Encode::define_alias( "UTF-16" => "UCS-2" );
Encode::define_alias( "UTF-16BE" => "UCS-2" );
Encode::define_alias( "UTF-16LE" => "ucs-2le" );
Encode::define_alias( "UTF16LE" => "ucs-2le" );
}
1;

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# $Id$
package XML::SAX::PurePerl;
use strict;
use XML::SAX::PurePerl::Productions qw($S $VersionNum $EncNameStart $EncNameEnd);
sub XMLDecl {
my ($self, $reader) = @_;
my $data = $reader->data(5);
# warn("Looking for xmldecl in: $data");
if ($data =~ /^<\?xml$S/o) {
$reader->move_along(5);
$self->skip_whitespace($reader);
# get version attribute
$self->VersionInfo($reader) ||
$self->parser_error("XML Declaration lacks required version attribute, or version attribute does not match XML specification", $reader);
if (!$self->skip_whitespace($reader)) {
my $data = $reader->data(2);
$data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
$reader->move_along(2);
return;
}
if ($self->EncodingDecl($reader)) {
if (!$self->skip_whitespace($reader)) {
my $data = $reader->data(2);
$data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
$reader->move_along(2);
return;
}
}
$self->SDDecl($reader);
$self->skip_whitespace($reader);
my $data = $reader->data(2);
$data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
$reader->move_along(2);
}
else {
# warn("first 5 bytes: ", join(',', unpack("CCCCC", $data)), "\n");
# no xml decl
if (!$reader->get_encoding) {
$reader->set_encoding("UTF-8");
}
}
}
sub VersionInfo {
my ($self, $reader) = @_;
my $data = $reader->data(11);
# warn("Looking for version in $data");
$data =~ /^(version$S*=$S*(["'])($VersionNum)\2)/o or return 0;
$reader->move_along(length($1));
my $vernum = $3;
if ($vernum ne "1.0") {
$self->parser_error("Only XML version 1.0 supported. Saw: '$vernum'", $reader);
}
return 1;
}
sub SDDecl {
my ($self, $reader) = @_;
my $data = $reader->data(15);
$data =~ /^(standalone$S*=$S*(["'])(yes|no)\2)/o or return 0;
$reader->move_along(length($1));
my $yesno = $3;
if ($yesno eq 'yes') {
$self->{standalone} = 1;
}
else {
$self->{standalone} = 0;
}
return 1;
}
sub EncodingDecl {
my ($self, $reader) = @_;
my $data = $reader->data(12);
$data =~ /^(encoding$S*=$S*(["'])($EncNameStart$EncNameEnd*)\2)/o or return 0;
$reader->move_along(length($1));
my $encoding = $3;
$reader->set_encoding($encoding);
return 1;
}
sub TextDecl {
my ($self, $reader) = @_;
my $data = $reader->data(6);
$data =~ /^<\?xml$S+/ or return;
$reader->move_along(5);
$self->skip_whitespace($reader);
if ($self->VersionInfo($reader)) {
$self->skip_whitespace($reader) ||
$self->parser_error("Lack of whitespace after version attribute in text declaration", $reader);
}
$self->EncodingDecl($reader) ||
$self->parser_error("Encoding declaration missing from external entity text declaration", $reader);
$self->skip_whitespace($reader);
$data = $reader->data(2);
$data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
return 1;
}
1;

11
t/00basic.t Normal file
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use Test;
BEGIN { plan tests => 2 }
END { ok($loaded == 2) }
use XML::SAX;
$loaded++;
use XML::SAX::PurePerl;
$loaded++;
ok(XML::SAX->VERSION eq XML::SAX::PurePerl->VERSION);

6
t/01known.t Normal file
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use Test;
BEGIN { plan tests => 3 }
use XML::SAX;
ok(XML::SAX->save_parsers);
ok(XML::SAX->load_parsers);
ok(@{XML::SAX->parsers}, 0);

19
t/10xmldecl1.t Normal file
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use Test;
BEGIN { plan tests => 5 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
use IO::File;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
my $file = IO::File->new("testfiles/01.xml") || die $!;
ok($file);
$parser->parse_file($file);
ok($handler->{seen}{start_document});
ok($handler->{seen}{end_document});

38
t/11xmldecl2.t Normal file
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use Test;
BEGIN { plan tests => 10 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
use IO::File;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
my $file = IO::File->new("testfiles/02a.xml");
ok($file);
# check invalid characters
eval {
$parser->parse_file($file);
};
ok($@);
print $@;
ok($@->{Message});
ok($@->{LineNumber}, 1);
ok($@->{ColumnNumber}, 6);
# check invalid version number
eval {
$parser->parse_uri("file:testfiles/02b.xml");
};
ok($@);
print $@;
ok($@->{LineNumber}, 1);
ok($@->{ColumnNumber}, 19);

25
t/12miscstart.t Normal file
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use Test;
BEGIN { plan tests => 6 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler,
"http://xml.org/sax/handlers/LexicalHandler" => $handler);
ok($parser);
# check PIs and comments before document element parse ok
$parser->parse_uri("testfiles/03a.xml");
ok($handler->{seen}{processing_instruction}, 2);
ok($handler->{seen}{comment});
# check invalid version number
eval {
$parser->parse_uri("testfiles/03b.xml");
};
ok($@);
ok($@->{LineNumber}, 4);

14
t/13int_ent.t Normal file
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use Test;
BEGIN { plan tests => 3 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
$parser->parse_uri("testfiles/04a.xml");
ok(1);

53
t/14encoding.t Normal file
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use Test;
BEGIN { $tests = 0;
if ($] >= 5.007002) { $tests = 9 }
plan tests => $tests;
}
if ($tests) {
use XML::SAX::PurePerl;
my $handler = TestHandler->new(); # see below for the TestHandler class
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
# warn("utf-16\n");
# verify that the first element is correctly decoded
$handler->{test_elements} = [ "\x{9031}\x{5831}" ];
$parser->parse_uri("testfiles/utf-16.xml");
ok(1);
# warn("utf-16le\n");
$handler->{test_elements} = [ "foo" ];
$parser->parse_uri("testfiles/utf-16le.xml");
ok(1);
# warn("koi8_r\n");
$parser->parse_uri("testfiles/koi8_r.xml");
ok(1);
# warn("8859-1\n");
$parser->parse_uri("testfiles/iso8859_1.xml");
ok(1);
# warn("8859-2\n");
$parser->parse_uri("testfiles/iso8859_2.xml");
ok(1);
}
package TestHandler;
use XML::SAX::PurePerl::DebugHandler;
use base qw(XML::SAX::PurePerl::DebugHandler);
use Test;
sub start_element {
my $self = shift;
if ($self->{test_elements} and
my $value = pop @{$self->{test_elements}}) {
ok($_[0]->{Name}, $value);
}
$self->SUPER::start_element(@_);
}
1;

113
t/15element.t Normal file
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use Test;
BEGIN { plan tests => 32 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
my $handler = TestElementHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
$handler->{test_el}{Name} = "foo";
$handler->{test_el}{LocalName} = "foo";
$handler->{test_el}{Prefix} = "";
$handler->{test_el}{NamespaceURI} = "";
$parser->parse_uri("testfiles/06a.xml");
$handler->reset;
$handler->{attr_name} = "{}a";
$handler->{test_attr}{Name} = "a";
$handler->{test_attr}{Value} = "1";
$handler->{test_attr}{Prefix} = "";
$handler->{test_attr}{LocalName} = "a";
$handler->{test_attr}{NamespaceURI} = "";
$parser->parse_uri("testfiles/06b.xml");
$handler->reset;
$handler->{test_el}{Name} = "foo";
$handler->{test_el}{LocalName} = "foo";
$handler->{test_el}{Prefix} = "";
$handler->{test_el}{NamespaceURI} = "http://foo.com";
$parser->parse_uri("testfiles/06c.xml");
$handler->reset;
$handler->{test_el}{Name} = "x:foo";
$handler->{test_el}{LocalName} = "foo";
$handler->{test_el}{Prefix} = "x";
$handler->{test_el}{NamespaceURI} = "http://foo.com";
$handler->{attr_name} = "{http://foo.com}a";
$handler->{test_attr}{Name} = "x:a";
$handler->{test_attr}{Value} = "2";
$handler->{test_attr}{Prefix} = "x";
$handler->{test_attr}{LocalName} = "a";
$handler->{test_attr}{NamespaceURI} = "http://foo.com";
$parser->parse_uri("testfiles/06d.xml");
$handler->reset;
$handler->{test_el}{Name} = "foo";
$handler->{test_el}{LocalName} = "foo";
$handler->{test_el}{Prefix} = "";
$handler->{test_el}{NamespaceURI} = "http://foo.com";
$handler->{attr_name} = "{}a";
$handler->{test_attr}{Name} = "a";
$handler->{test_attr}{NamespaceURI} = "";
$parser->parse_uri("testfiles/06e.xml");
$handler->reset;
# prefix with no ns binding. Error.
eval {
$parser->parse_uri("testfiles/06f.xml");
};
ok($@);
$handler->reset;
$handler->{test_chr}{Data} = "bar";
$parser->parse_uri("testfiles/06g.xml");
## HELPER PACKAGE ##
package TestElementHandler;
use Test;
sub new {
my $class = shift;
my %opts = @_;
bless \%opts, $class;
}
sub reset {
my $self = shift;
%$self = ();
}
sub start_element {
my ($self, $el) = @_;
if ($self->{test_el}) {
foreach my $key (keys %{ $self->{test_el} }) {
#warn $key, "\n";
ok("$key: $el->{$key}", "$key: $self->{test_el}{$key}");
}
}
if ($self->{test_attr}) {
foreach my $key (keys %{ $self->{test_attr} }) {
#warn $key, "\n";
ok("$key: $el->{Attributes}{ $self->{attr_name} }{$key}", "$key: $self->{test_attr}{$key}");
}
}
}
sub characters {
my ($self, @text) = @_;
if ($self->{test_chr}) {
foreach my $text (@text) {
foreach my $key (keys %{ $self->{test_chr} }) {
#warn $key, "\n";
ok("$key: $text->{$key}", "$key: $self->{test_chr}{$key}");
}
}
}
}

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use Test;
BEGIN { plan tests => 3 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
my $time = time;
$parser->parse_uri("testfiles/xmltest.xml");
warn("parsed ", -s "testfiles/xmltest.xml", " bytes in ", time - $time, " seconds\n");
ok(1);

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use Test;
BEGIN { plan tests => 2 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
my $value = do { local $/ = undef; my $data = <DATA>; };
my $parser = XML::SAX::PurePerl->new(Handler => My::SAXFilter->new());
$parser->parse_string($value);
package My::SAXFilter;
use base qw(XML::SAX::Base);
sub processing_instruction {
my $this = shift;
my $data = shift;
main::ok($data->{Target},"xml-stylesheet");
main::ok($data->{Data},"type=\"text/xsl\" href=\"processorinxml/base.xsl\"");
}
__END__
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="processorinxml/base.xsl"?>
<body/>

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use Test;
BEGIN { plan tests => 16 }
use XML::SAX::ParserFactory;
# load SAX parsers (no ParserDetails.ini available at first in blib)
use XML::SAX qw(Namespaces Validation);
ok(@{XML::SAX->parsers}, 0);
ok(XML::SAX->add_parser(q(XML::SAX::PurePerl)));
ok(@{XML::SAX->parsers}, 1);
ok(XML::SAX::ParserFactory->parser); # test class method
my $factory = XML::SAX::ParserFactory->new();
ok($factory);
ok($factory->parser);
ok($factory->require_feature(Namespaces));
ok($factory->parser);
ok($factory->require_feature(Validation));
eval {
my $parser = $factory->parser;
# should never get here unless PurePerl starts providing validation
ok(!$parser);
};
ok($@);
ok($@->isa('XML::SAX::Exception'));
$factory = XML::SAX::ParserFactory->new();
my $parser = $factory->parser;
ok($parser);
eval {
$parser->parse_string('<widget/>');
ok(1);
};
ok(!$@);
local $XML::SAX::ParserPackage = 'XML::SAX::PurePerl';
ok(XML::SAX::ParserFactory->parser);
local $XML::SAX::ParserPackage = 'XML::SAX::PurePerl (0.01)';
ok(XML::SAX::ParserFactory->parser);

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use strict;
use Test;
plan tests => 8;
use File::Path;
use Fatal qw(open close chdir mkpath);
use XML::SAX;
use vars qw(*FILE);
ok(@{XML::SAX->parsers}, 0);
ok(XML::SAX->add_parser(q(XML::SAX::PurePerl)));
ok(@{XML::SAX->parsers}, 1);
rmtree('t/lib', 0, 0);
mkpath('t/lib', 0, 0777);
push @INC, 't/lib';
write_file('t/lib/TestParserPackage.pm', <<EOT);
package TestParserPackage;
use XML::SAX::Base;
\@ISA = qw(XML::SAX::Base);
sub new {
return bless {}, shift
}
sub supported_features {
return ('http://axkit.org/sax/frobnosticating');
}
1;
EOT
my $parser;
# Test we can get TestParserPackage out
write_file('t/lib/SAX.ini', 'ParserPackage = TestParserPackage');
$parser = XML::SAX::ParserFactory->parser();
ok(ref($parser), "TestParserPackage", "Parser was not TestParserPackage");
# Test we can get XML::SAX::PurePerl out
write_file('t/lib/SAX.ini', 'ParserPackage = XML::SAX::PurePerl');
$parser = XML::SAX::ParserFactory->parser();
ok(ref($parser), "XML::SAX::PurePerl", "Parser was not XML::SAX::PurePerl");
# Test we can ask for a frobnosticating parser, but not get it
write_file('t/lib/SAX.ini', 'http://axkit.org/sax/frobnosticating = 1');
$parser = XML::SAX::ParserFactory->parser();
ok(ref($parser), "XML::SAX::PurePerl", "Parser was not PurePerl (frobnosticating)");
# Test we can ask for a frobnosticating parser, and get it
XML::SAX->add_parser('TestParserPackage');
$parser = XML::SAX::ParserFactory->parser();
ok(ref($parser), "TestParserPackage", "Parser was not TestParserPackage (frobnosticating)");
# Test we can get a namespaces parser
write_file('t/lib/SAX.ini', 'http://xml.org/sax/features/namespaces = 1');
$parser = XML::SAX::ParserFactory->parser();
ok(ref($parser), "XML::SAX::PurePerl", "Parser was not PurePerl (namespaces)");
sub write_file {
my ($file, $data) = @_;
open(FILE, ">$file");
print FILE $data, "\n";
close FILE;
}

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use Test;
BEGIN { plan tests => 5 }
use XML::SAX::PurePerl;
use XML::SAX::PurePerl::DebugHandler;
use IO::File;
my $handler = XML::SAX::PurePerl::DebugHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
my $file1 = IO::File->new("testfiles/01.xml");
ok($file1);
eval {
$parser->parse_file($file1);
};
print $@;
ok(!$@);
my $file2 = "testfiles/01.xml";
eval {
$parser->parse_file($file2);
};
print $@;
ok(!$@);

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use strict;
use warnings;
use Test;
BEGIN { plan tests => 4 }
use XML::SAX::PurePerl;
my $handler = CDataHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
$parser->parse_string('<code><![CDATA[<crackers & cheese>]]></code>');
ok(1); # parser didn't die
my $expected = '<crackers & cheese>';
ok($handler->cbuffer, $expected);
exit;
package CDataHandler;
use base 'XML::SAX::Base';
sub start_document { shift->{_buf} = ''; }
sub characters { shift->{_buf} .= shift->{Data}; }
sub cbuffer { shift->{_buf}; }

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use strict;
use warnings;
use Test;
BEGIN { plan tests => 4 }
use XML::SAX::PurePerl;
my $handler = AttrHandler->new();
ok($handler);
my $parser = XML::SAX::PurePerl->new(Handler => $handler);
ok($parser);
$parser->parse_string('<code amp="&amp;" x3E="&#x3E;" num="&#65;" />');
ok(1); # parser didn't die
my $expected = "amp=& num=A x3E=> ";
ok($handler->attributes, $expected);
exit;
package AttrHandler;
use base 'XML::SAX::Base';
sub start_document { shift->{_buf} = ''; }
sub attributes { shift->{_buf}; }
sub start_element {
my($self, $data) = @_;
my $attr = $data->{Attributes};
foreach (sort keys %$attr) {
$self->{_buf} .= "$attr->{$_}->{LocalName}=$attr->{$_}->{Value} ";
}
}

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use Test;
BEGIN { plan tests => 1 }
use File::Spec;
ok(unlink(
File::Spec->catdir(qw(blib lib XML SAX ParserDetails.ini))),
1,
'delete ParserDetails.ini'
);

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<?xml version="1.0"?>
<foo/>

1
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<?xml version="1.0!"?>

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<?xml version="2.0" standalone="yes"?>
<foo>
Hello World
</foo>

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<?xml version="1.0"?>
<?foo foo?>
<?foo?>
<!--comment-->
<foo/>

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<?xml version="1.0"?>
<?foo foo?>
<?foo?>
<!--bad comment--->
<foo/>

1
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<foo>text &amp;</foo>

1
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<foo/>

1
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<foo a="1"/>

1
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<foo xmlns="http://foo.com"/>

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<x:foo xmlns:x="http://foo.com" a="1" x:a="2"/>

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<foo xmlns="http://foo.com" a="1"/>

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<!-- namespace validation error -->
<b:foo xmlns:a="http://foo.com"/>

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<foo><![CDATA[bar]]></foo>

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<?xml version="1.0" encoding="ISO8859-1"?>
<foo>Some Latin-1 chars: éÊË</foo>

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<?xml version="1.0" encoding="ISO8859-2"?>
<foo>Some Latin-2 chars: ñýÎ (could do with some real latin-2 here)</foo>

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<?xml version="1.0" encoding="koi8-r"?>
<документ атт="русский">
<раздел>
<голова>Тест</голова>
Здравствуй Мир!
</раздел>
</документ>

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