| 1 | ############################################################################## |
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| 2 | # |
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| 3 | # This library is free software; you can redistribute it and/or |
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| 4 | # modify it under the terms of the GNU Library General Public |
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| 5 | # License as published by the Free Software Foundation; either |
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| 6 | # version 2 of the License, or (at your option) any later version. |
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| 7 | # |
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| 8 | # This library is distributed in the hope that it will be useful, |
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| 9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 11 | # Library General Public License for more details. |
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| 12 | # |
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| 13 | # You should have received a copy of the GNU Library General Public |
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| 14 | # License along with this library; if not, write to the |
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| 15 | # Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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| 16 | # Boston, MA 02111-1307, USA. |
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| 17 | # |
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| 18 | # Jabber |
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| 19 | # Copyright (C) 1998-2004 Jabber Software Foundation http://jabber.org/ |
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| 20 | # |
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| 21 | ############################################################################## |
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| 22 | |
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| 23 | package XML::Stream::Parser; |
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| 24 | |
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| 25 | =head1 NAME |
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| 26 | |
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| 27 | XML::Stream::Parser - SAX XML Parser for XML Streams |
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| 28 | |
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| 29 | =head1 SYNOPSIS |
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| 30 | |
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| 31 | Light weight XML parser that builds XML::Parser::Tree objects from the |
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| 32 | incoming stream and passes them to a function to tell whoever is using |
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| 33 | it that there are new packets. |
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| 34 | |
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| 35 | =head1 DESCRIPTION |
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| 36 | |
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| 37 | This module provides a very light weight parser |
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| 38 | |
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| 39 | =head1 METHODS |
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| 40 | |
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| 41 | =head1 EXAMPLES |
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| 42 | |
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| 43 | =head1 AUTHOR |
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| 44 | |
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| 45 | By Ryan Eatmon in January of 2001 for http://jabber.org/ |
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| 46 | |
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| 47 | =head1 COPYRIGHT |
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| 48 | |
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| 49 | This module is free software; you can redistribute it and/or modify |
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| 50 | it under the same terms as Perl itself. |
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| 51 | |
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| 52 | =cut |
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| 53 | |
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| 54 | use strict; |
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| 55 | use vars qw( $VERSION ); |
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| 56 | |
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| 57 | $VERSION = "1.22"; |
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| 58 | |
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| 59 | sub new |
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| 60 | { |
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| 61 | my $self = { }; |
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| 62 | |
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| 63 | bless($self); |
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| 64 | |
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| 65 | my %args; |
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| 66 | while($#_ >= 0) { $args{ lc pop(@_) } = pop(@_); } |
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| 67 | |
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| 68 | $self->{PARSING} = 0; |
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| 69 | $self->{DOC} = 0; |
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| 70 | $self->{XML} = ""; |
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| 71 | $self->{CNAME} = (); |
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| 72 | $self->{CURR} = 0; |
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| 73 | |
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| 74 | $args{nonblocking} = 0 unless exists($args{nonblocking}); |
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| 75 | |
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| 76 | $self->{NONBLOCKING} = delete($args{nonblocking}); |
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| 77 | |
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| 78 | $self->{DEBUGTIME} = 0; |
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| 79 | $self->{DEBUGTIME} = $args{debugtime} if exists($args{debugtime}); |
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| 80 | |
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| 81 | $self->{DEBUGLEVEL} = 0; |
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| 82 | $self->{DEBUGLEVEL} = $args{debuglevel} if exists($args{debuglevel}); |
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| 83 | |
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| 84 | $self->{DEBUGFILE} = ""; |
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| 85 | |
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| 86 | if (exists($args{debugfh}) && ($args{debugfh} ne "")) |
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| 87 | { |
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| 88 | $self->{DEBUGFILE} = $args{debugfh}; |
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| 89 | $self->{DEBUG} = 1; |
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| 90 | } |
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| 91 | |
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| 92 | if ((exists($args{debugfh}) && ($args{debugfh} eq "")) || |
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| 93 | (exists($args{debug}) && ($args{debug} ne ""))) |
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| 94 | { |
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| 95 | $self->{DEBUG} = 1; |
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| 96 | if (lc($args{debug}) eq "stdout") |
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| 97 | { |
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| 98 | $self->{DEBUGFILE} = new FileHandle(">&STDERR"); |
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| 99 | $self->{DEBUGFILE}->autoflush(1); |
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| 100 | } |
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| 101 | else |
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| 102 | { |
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| 103 | if (-e $args{debug}) |
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| 104 | { |
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| 105 | if (-w $args{debug}) |
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| 106 | { |
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| 107 | $self->{DEBUGFILE} = new FileHandle(">$args{debug}"); |
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| 108 | $self->{DEBUGFILE}->autoflush(1); |
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| 109 | } |
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| 110 | else |
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| 111 | { |
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| 112 | print "WARNING: debug file ($args{debug}) is not writable by you\n"; |
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| 113 | print " No debug information being saved.\n"; |
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| 114 | $self->{DEBUG} = 0; |
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| 115 | } |
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| 116 | } |
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| 117 | else |
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| 118 | { |
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| 119 | $self->{DEBUGFILE} = new FileHandle(">$args{debug}"); |
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| 120 | if (defined($self->{DEBUGFILE})) |
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| 121 | { |
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| 122 | $self->{DEBUGFILE}->autoflush(1); |
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| 123 | } |
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| 124 | else |
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| 125 | { |
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| 126 | print "WARNING: debug file ($args{debug}) does not exist \n"; |
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| 127 | print " and is not writable by you.\n"; |
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| 128 | print " No debug information being saved.\n"; |
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| 129 | $self->{DEBUG} = 0; |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | } |
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| 134 | |
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| 135 | $self->{SID} = exists($args{sid}) ? $args{sid} : "__xmlstream__:sid"; |
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| 136 | |
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| 137 | $self->{STYLE} = (exists($args{style}) ? lc($args{style}) : "tree"); |
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| 138 | $self->{DTD} = (exists($args{dtd}) ? lc($args{dtd}) : 0); |
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| 139 | |
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| 140 | if ($self->{STYLE} eq "tree") |
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| 141 | { |
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| 142 | $self->{HANDLER}->{startDocument} = sub{ $self->startDocument(@_); }; |
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| 143 | $self->{HANDLER}->{endDocument} = sub{ $self->endDocument(@_); }; |
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| 144 | $self->{HANDLER}->{startElement} = sub{ &XML::Stream::Tree::_handle_element(@_); }; |
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| 145 | $self->{HANDLER}->{endElement} = sub{ &XML::Stream::Tree::_handle_close(@_); }; |
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| 146 | $self->{HANDLER}->{characters} = sub{ &XML::Stream::Tree::_handle_cdata(@_); }; |
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| 147 | } |
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| 148 | elsif ($self->{STYLE} eq "node") |
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| 149 | { |
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| 150 | $self->{HANDLER}->{startDocument} = sub{ $self->startDocument(@_); }; |
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| 151 | $self->{HANDLER}->{endDocument} = sub{ $self->endDocument(@_); }; |
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| 152 | $self->{HANDLER}->{startElement} = sub{ &XML::Stream::Node::_handle_element(@_); }; |
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| 153 | $self->{HANDLER}->{endElement} = sub{ &XML::Stream::Node::_handle_close(@_); }; |
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| 154 | $self->{HANDLER}->{characters} = sub{ &XML::Stream::Node::_handle_cdata(@_); }; |
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| 155 | } |
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| 156 | $self->setHandlers(%{$args{handlers}}); |
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| 157 | |
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| 158 | $self->{XMLONHOLD} = ""; |
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| 159 | |
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| 160 | return $self; |
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| 161 | } |
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| 162 | |
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| 163 | |
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| 164 | ########################################################################### |
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| 165 | # |
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| 166 | # debug - prints the arguments to the debug log if debug is turned on. |
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| 167 | # |
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| 168 | ########################################################################### |
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| 169 | sub debug |
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| 170 | { |
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| 171 | return if ($_[1] > $_[0]->{DEBUGLEVEL}); |
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| 172 | my $self = shift; |
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| 173 | my ($limit,@args) = @_; |
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| 174 | return if ($self->{DEBUGFILE} eq ""); |
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| 175 | my $fh = $self->{DEBUGFILE}; |
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| 176 | if ($self->{DEBUGTIME} == 1) |
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| 177 | { |
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| 178 | my ($sec,$min,$hour) = localtime(time); |
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| 179 | print $fh sprintf("[%02d:%02d:%02d] ",$hour,$min,$sec); |
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| 180 | } |
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| 181 | print $fh "XML::Stream::Parser: $self->{STYLE}: @args\n"; |
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| 182 | } |
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| 183 | |
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| 184 | |
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| 185 | sub setSID |
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| 186 | { |
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| 187 | my $self = shift; |
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| 188 | my $sid = shift; |
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| 189 | $self->{SID} = $sid; |
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| 190 | } |
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| 191 | |
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| 192 | |
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| 193 | sub getSID |
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| 194 | { |
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| 195 | my $self = shift; |
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| 196 | return $self->{SID}; |
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| 197 | } |
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| 198 | |
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| 199 | |
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| 200 | sub setHandlers |
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| 201 | { |
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| 202 | my $self = shift; |
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| 203 | my (%handlers) = @_; |
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| 204 | |
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| 205 | foreach my $handler (keys(%handlers)) |
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| 206 | { |
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| 207 | $self->{HANDLER}->{$handler} = $handlers{$handler}; |
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| 208 | } |
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| 209 | } |
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| 210 | |
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| 211 | |
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| 212 | sub parse |
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| 213 | { |
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| 214 | my $self = shift; |
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| 215 | my $xml = shift; |
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| 216 | |
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| 217 | return unless defined($xml); |
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| 218 | return if ($xml eq ""); |
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| 219 | |
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| 220 | if ($self->{XMLONHOLD} ne "") |
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| 221 | { |
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| 222 | $self->{XML} = $self->{XMLONHOLD}; |
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| 223 | $self->{XMLONHOLD} = ""; |
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| 224 | } |
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| 225 | |
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| 226 | # XXX change this to not use regex? |
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| 227 | while($xml =~ s/<\!--.*?-->//gs) {} |
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| 228 | |
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| 229 | $self->{XML} .= $xml; |
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| 230 | |
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| 231 | return if ($self->{PARSING} == 1); |
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| 232 | |
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| 233 | $self->{PARSING} = 1; |
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| 234 | |
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| 235 | if(!$self->{DOC} == 1) |
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| 236 | { |
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| 237 | my $start = index($self->{XML},"<"); |
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| 238 | |
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| 239 | if ((substr($self->{XML},$start,3) eq "<?x") || |
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| 240 | (substr($self->{XML},$start,3) eq "<?X")) |
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| 241 | { |
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| 242 | my $close = index($self->{XML},"?>"); |
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| 243 | if ($close == -1) |
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| 244 | { |
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| 245 | $self->{PARSING} = 0; |
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| 246 | return; |
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| 247 | } |
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| 248 | $self->{XML} = substr($self->{XML},$close+2,length($self->{XML})-$close-2); |
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| 249 | } |
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| 250 | |
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| 251 | &{$self->{HANDLER}->{startDocument}}($self); |
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| 252 | $self->{DOC} = 1; |
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| 253 | } |
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| 254 | |
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| 255 | while(1) |
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| 256 | { |
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| 257 | if (length($self->{XML}) == 0) |
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| 258 | { |
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| 259 | $self->{PARSING} = 0; |
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| 260 | return $self->returnData(0); |
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| 261 | } |
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| 262 | my $eclose = -1; |
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| 263 | $eclose = index($self->{XML},"</".$self->{CNAME}->[$self->{CURR}].">") |
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| 264 | if ($#{$self->{CNAME}} > -1); |
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| 265 | |
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| 266 | if ($eclose == 0) |
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| 267 | { |
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| 268 | $self->{XML} = substr($self->{XML},length($self->{CNAME}->[$self->{CURR}])+3,length($self->{XML})-length($self->{CNAME}->[$self->{CURR}])-3); |
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| 269 | |
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| 270 | $self->{PARSING} = 0 if ($self->{NONBLOCKING} == 1); |
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| 271 | &{$self->{HANDLER}->{endElement}}($self,$self->{CNAME}->[$self->{CURR}]); |
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| 272 | $self->{PARSING} = 1 if ($self->{NONBLOCKING} == 1); |
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| 273 | |
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| 274 | $self->{CURR}--; |
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| 275 | if ($self->{CURR} == 0) |
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| 276 | { |
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| 277 | $self->{DOC} = 0; |
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| 278 | $self->{PARSING} = 0; |
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| 279 | &{$self->{HANDLER}->{endDocument}}($self); |
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| 280 | return $self->returnData(0); |
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| 281 | } |
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| 282 | next; |
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| 283 | } |
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| 284 | |
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| 285 | my $estart = index($self->{XML},"<"); |
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| 286 | my $cdatastart = index($self->{XML},"<![CDATA["); |
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| 287 | if (($estart == 0) && ($cdatastart != 0)) |
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| 288 | { |
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| 289 | my $close = index($self->{XML},">"); |
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| 290 | if ($close == -1) |
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| 291 | { |
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| 292 | $self->{PARSING} = 0; |
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| 293 | return $self->returnData(0); |
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| 294 | } |
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| 295 | my $empty = (substr($self->{XML},$close-1,1) eq "/"); |
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| 296 | my $starttag = substr($self->{XML},1,$close-($empty ? 2 : 1)); |
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| 297 | my $nextspace = index($starttag," "); |
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| 298 | my $attribs; |
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| 299 | my $name; |
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| 300 | if ($nextspace != -1) |
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| 301 | { |
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| 302 | $name = substr($starttag,0,$nextspace); |
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| 303 | $attribs = substr($starttag,$nextspace+1,length($starttag)-$nextspace-1); |
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| 304 | } |
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| 305 | else |
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| 306 | { |
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| 307 | $name = $starttag; |
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| 308 | } |
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| 309 | |
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| 310 | my %attribs = $self->attribution($attribs); |
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| 311 | if (($self->{DTD} == 1) && (exists($attribs{xmlns}))) |
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| 312 | { |
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| 313 | } |
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| 314 | |
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| 315 | &{$self->{HANDLER}->{startElement}}($self,$name,%attribs); |
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| 316 | |
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| 317 | if($empty == 1) |
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| 318 | { |
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| 319 | &{$self->{HANDLER}->{endElement}}($self,$name); |
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| 320 | } |
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| 321 | else |
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| 322 | { |
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| 323 | $self->{CURR}++; |
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| 324 | $self->{CNAME}->[$self->{CURR}] = $name; |
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| 325 | } |
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| 326 | |
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| 327 | $self->{XML} = substr($self->{XML},$close+1,length($self->{XML})-$close-1); |
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| 328 | next; |
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| 329 | } |
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| 330 | |
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| 331 | if ($cdatastart == 0) |
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| 332 | { |
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| 333 | my $cdataclose = index($self->{XML},"]]>"); |
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| 334 | if ($cdataclose == -1) |
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| 335 | { |
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| 336 | $self->{PARSING} = 0; |
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| 337 | return $self->returnData(0); |
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| 338 | } |
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| 339 | |
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| 340 | &{$self->{HANDLER}->{characters}}($self,substr($self->{XML},9,$cdataclose-9)); |
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| 341 | |
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| 342 | $self->{XML} = substr($self->{XML},$cdataclose+3,length($self->{XML})-$cdataclose-3); |
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| 343 | next; |
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| 344 | } |
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| 345 | |
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| 346 | if ($estart == -1) |
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| 347 | { |
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| 348 | $self->{XMLONHOLD} = $self->{XML}; |
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| 349 | $self->{XML} = ""; |
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| 350 | } |
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| 351 | elsif (($cdatastart == -1) || ($cdatastart > $estart)) |
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| 352 | { |
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| 353 | &{$self->{HANDLER}->{characters}}($self,$self->entityCheck(substr($self->{XML},0,$estart))); |
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| 354 | $self->{XML} = substr($self->{XML},$estart,length($self->{XML})-$estart); |
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| 355 | } |
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| 356 | } |
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| 357 | } |
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| 358 | |
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| 359 | |
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| 360 | sub attribution |
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| 361 | { |
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| 362 | my $self = shift; |
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| 363 | my $str = shift; |
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| 364 | |
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| 365 | $str = "" unless defined($str); |
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| 366 | |
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| 367 | my %attribs; |
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| 368 | |
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| 369 | while(1) |
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| 370 | { |
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| 371 | my $eq = index($str,"="); |
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| 372 | if((length($str) == 0) || ($eq == -1)) |
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| 373 | { |
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| 374 | return %attribs; |
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| 375 | } |
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| 376 | |
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| 377 | my $ids; |
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| 378 | my $id; |
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| 379 | my $id1 = index($str,"\'"); |
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| 380 | my $id2 = index($str,"\""); |
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| 381 | |
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| 382 | return %attribs if ($id1 == -1 && $id2 == -1); |
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| 383 | |
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| 384 | if((($id1 < $id2) && ($id1 != -1)) || ($id2 == -1)) |
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| 385 | { |
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| 386 | $ids = $id1; |
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| 387 | $id = "\'"; |
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| 388 | } |
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| 389 | if((($id2 < $id1) && ($id2 != -1)) || ($id1 == -1)) |
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| 390 | { |
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| 391 | $ids = $id2; |
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| 392 | $id = "\""; |
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| 393 | } |
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| 394 | |
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| 395 | my $nextid = index($str,$id,$ids+1); |
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| 396 | my $val = substr($str,$ids+1,$nextid-$ids-1); |
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| 397 | my $key = substr($str,0,$eq); |
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| 398 | |
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| 399 | while($key =~ s/\s//) {} |
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| 400 | |
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| 401 | $attribs{$key} = $self->entityCheck($val); |
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| 402 | $str = substr($str,$nextid+1,length($str)-$nextid-1); |
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| 403 | } |
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| 404 | |
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| 405 | return %attribs; |
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| 406 | } |
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| 407 | |
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| 408 | |
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| 409 | sub entityCheck |
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| 410 | { |
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| 411 | my $self = shift; |
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| 412 | my $str = shift; |
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| 413 | |
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| 414 | while($str =~ s/\<\;/\</) {} |
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| 415 | while($str =~ s/\>\;/\>/) {} |
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| 416 | while($str =~ s/\"\;/\"/) {} |
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| 417 | while($str =~ s/\&apos\;/\'/) {} |
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| 418 | while($str =~ s/\&\;/\&/) {} |
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| 419 | |
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| 420 | return $str; |
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| 421 | } |
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| 422 | |
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| 423 | |
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| 424 | sub parsefile |
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| 425 | { |
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| 426 | my $self = shift; |
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| 427 | my $fileName = shift; |
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| 428 | |
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| 429 | open(FILE,"<",$fileName); |
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| 430 | my $file; |
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| 431 | while(<FILE>) { $file .= $_; } |
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| 432 | $self->parse($file); |
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| 433 | close(FILE); |
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| 434 | |
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| 435 | return $self->returnData(); |
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| 436 | } |
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| 437 | |
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| 438 | |
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| 439 | sub returnData |
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| 440 | { |
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| 441 | my $self = shift; |
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| 442 | my $clearData = shift; |
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| 443 | $clearData = 1 unless defined($clearData); |
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| 444 | |
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| 445 | my $sid = $self->{SID}; |
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| 446 | |
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| 447 | if ($self->{STYLE} eq "tree") |
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| 448 | { |
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| 449 | return unless exists($self->{SIDS}->{$sid}->{tree}); |
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| 450 | my @tree = @{$self->{SIDS}->{$sid}->{tree}}; |
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| 451 | delete($self->{SIDS}->{$sid}->{tree}) if ($clearData == 1); |
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| 452 | return ( \@tree ); |
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| 453 | } |
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| 454 | if ($self->{STYLE} eq "node") |
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| 455 | { |
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| 456 | return unless exists($self->{SIDS}->{$sid}->{node}); |
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| 457 | my $node = $self->{SIDS}->{$sid}->{node}->[0]; |
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| 458 | delete($self->{SIDS}->{$sid}->{node}) if ($clearData == 1); |
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| 459 | return $node; |
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| 460 | } |
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| 461 | } |
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| 462 | |
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| 463 | |
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| 464 | sub startDocument |
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| 465 | { |
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| 466 | my $self = shift; |
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| 467 | } |
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| 468 | |
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| 469 | |
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| 470 | sub endDocument |
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| 471 | { |
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| 472 | my $self = shift; |
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| 473 | } |
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| 474 | |
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| 475 | |
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| 476 | sub startElement |
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| 477 | { |
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| 478 | my $self = shift; |
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| 479 | my ($sax, $tag, %att) = @_; |
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| 480 | |
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| 481 | return unless ($self->{DOC} == 1); |
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| 482 | |
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| 483 | if ($self->{STYLE} eq "debug") |
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| 484 | { |
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| 485 | print "$self->{DEBUGHEADER} \\\\ (",join(" ",%att),")\n"; |
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| 486 | $self->{DEBUGHEADER} .= $tag." "; |
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| 487 | } |
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| 488 | else |
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| 489 | { |
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| 490 | my @NEW; |
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| 491 | if($#{$self->{TREE}} < 0) |
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| 492 | { |
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| 493 | push @{$self->{TREE}}, $tag; |
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| 494 | } |
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| 495 | else |
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| 496 | { |
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| 497 | push @{ $self->{TREE}[ $#{$self->{TREE}}]}, $tag; |
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| 498 | } |
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| 499 | push @NEW, \%att; |
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| 500 | push @{$self->{TREE}}, \@NEW; |
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| 501 | } |
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| 502 | } |
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| 503 | |
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| 504 | |
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| 505 | sub characters |
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| 506 | { |
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| 507 | my $self = shift; |
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| 508 | my ($sax, $cdata) = @_; |
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| 509 | |
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| 510 | return unless ($self->{DOC} == 1); |
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| 511 | |
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| 512 | if ($self->{STYLE} eq "debug") |
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| 513 | { |
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| 514 | my $str = $cdata; |
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| 515 | $str =~ s/\n/\#10\;/g; |
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| 516 | print "$self->{DEBUGHEADER} || $str\n"; |
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| 517 | } |
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| 518 | else |
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| 519 | { |
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| 520 | return if ($#{$self->{TREE}} == -1); |
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| 521 | |
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| 522 | my $pos = $#{$self->{TREE}}; |
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| 523 | |
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| 524 | if ($pos > 0 && $self->{TREE}[$pos - 1] eq "0") |
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| 525 | { |
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| 526 | $self->{TREE}[$pos - 1] .= $cdata; |
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| 527 | } |
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| 528 | else |
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| 529 | { |
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| 530 | push @{$self->{TREE}[$#{$self->{TREE}}]}, 0; |
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| 531 | push @{$self->{TREE}[$#{$self->{TREE}}]}, $cdata; |
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| 532 | } |
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| 533 | } |
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| 534 | } |
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| 535 | |
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| 536 | |
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| 537 | sub endElement |
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| 538 | { |
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| 539 | my $self = shift; |
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| 540 | my ($sax, $tag) = @_; |
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| 541 | |
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| 542 | return unless ($self->{DOC} == 1); |
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| 543 | |
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| 544 | if ($self->{STYLE} eq "debug") |
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| 545 | { |
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| 546 | $self->{DEBUGHEADER} =~ s/\S+\ $//; |
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| 547 | print "$self->{DEBUGHEADER} //\n"; |
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| 548 | } |
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| 549 | else |
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| 550 | { |
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| 551 | my $CLOSED = pop @{$self->{TREE}}; |
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| 552 | |
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| 553 | if($#{$self->{TREE}} < 1) |
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| 554 | { |
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| 555 | push @{$self->{TREE}}, $CLOSED; |
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| 556 | |
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| 557 | if($self->{TREE}->[0] eq "stream:error") |
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| 558 | { |
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| 559 | $self->{STREAMERROR} = $self->{TREE}[1]->[2]; |
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| 560 | } |
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| 561 | } |
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| 562 | else |
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| 563 | { |
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| 564 | push @{$self->{TREE}[$#{$self->{TREE}}]}, $CLOSED; |
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| 565 | } |
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| 566 | } |
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| 567 | } |
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| 568 | |
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| 569 | |
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| 570 | 1; |
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