1 | ###########################################################################
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2 | #
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3 | # HTMLPlug.pm -- basic html plugin
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4 | #
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5 | # A component of the Greenstone digital library software
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6 | # from the New Zealand Digital Library Project at the
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7 | # University of Waikato, New Zealand.
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8 | #
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9 | # Copyright (C) 1999 New Zealand Digital Library Project
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10 | #
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11 | # This program is free software; you can redistribute it and/or modify
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12 | # it under the terms of the GNU General Public License as published by
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13 | # the Free Software Foundation; either version 2 of the License, or
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14 | # (at your option) any later version.
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15 | #
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16 | # This program is distributed in the hope that it will be useful,
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17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | # GNU General Public License for more details.
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20 | #
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21 | # You should have received a copy of the GNU General Public License
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22 | # along with this program; if not, write to the Free Software
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23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | #
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25 | ###########################################################################
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26 |
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27 | #
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28 | # Note that this plugin handles frames only in a very simple way
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29 | # i.e. each frame is treated as a separate document. This means
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30 | # search results will contain links to individual frames rather
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31 | # than linking to the top level frameset.
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32 | # There may also be some problems caused by the _parent target
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33 | # (it's removed by this plugin)
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34 | #
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35 |
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36 | package HTMLPlug;
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37 |
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38 | use BasPlug;
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39 | use ghtml;
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40 | use unicode;
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41 | use util;
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42 | use parsargv;
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43 | use XMLParser;
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44 |
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45 | sub BEGIN {
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46 | @HTMLPlug::ISA = ('BasPlug');
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47 | }
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48 |
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49 | use strict; # every perl program should have this!
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50 | no strict 'refs'; # make an exception so we can use variables as filehandles
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51 |
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52 | my $arguments =
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53 | [ { 'name' => "process_exp",
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54 | 'desc' => "{BasPlug.process_exp}",
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55 | 'type' => "regexp",
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56 | 'deft' => &get_default_process_exp() },
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57 | { 'name' => "block_exp",
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58 | 'desc' => "{BasPlug.block_exp}",
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59 | 'type' => 'regexp',
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60 | 'deft' => &get_default_block_exp() },
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61 | { 'name' => "nolinks",
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62 | 'desc' => "{HTMLPlug.nolinks}",
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63 | 'type' => "flag" },
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64 | { 'name' => "keep_head",
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65 | 'desc' => "{HTMLPlug.keep_head}",
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66 | 'type' => "flag" },
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67 | { 'name' => "no_metadata",
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68 | 'desc' => "{HTMLPlug.no_metadata}",
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69 | 'type' => "flag" },
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70 | { 'name' => "metadata_fields",
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71 | 'desc' => "{HTMLPlug.metadata_fields}",
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72 | 'type' => "string",
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73 | 'deft' => "Title" },
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74 | { 'name' => "hunt_creator_metadata",
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75 | 'desc' => "{HTMLPlug.hunt_creator_metadata}",
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76 | 'type' => "flag" },
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77 | { 'name' => "file_is_url",
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78 | 'desc' => "{HTMLPlug.file_is_url}",
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79 | 'type' => "flag" },
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80 | { 'name' => "assoc_files",
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81 | 'desc' => "{HTMLPlug.assoc_files}",
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82 | 'type' => "regexp",
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83 | 'deft' => &get_default_block_exp() },
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84 | { 'name' => "rename_assoc_files",
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85 | 'desc' => "{HTMLPlug.rename_assoc_files}",
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86 | 'type' => "flag" },
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87 | { 'name' => "title_sub",
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88 | 'desc' => "{HTMLPlug.title_sub}",
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89 | 'type' => "string",
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90 | 'deft' => "" },
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91 | { 'name' => "description_tags",
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92 | 'desc' => "{HTMLPlug.description_tags}",
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93 | 'type' => "flag" },
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94 | { 'name' => "no_strip_metadata_html",
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95 | 'desc' => "{HTMLPlug.no_strip_metadata_html}",
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96 | 'type' => "string",
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97 | 'deft' => "",
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98 | 'reqd' => "no"}
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99 | ];
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100 |
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101 | my $options = { 'name' => "HTMLPlug",
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102 | 'desc' => "{HTMLPlug.desc}",
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103 | 'abstract' => "no",
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104 | 'inherits' => "yes",
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105 | 'args' => $arguments };
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106 |
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107 | sub new {
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108 | my $class = shift (@_);
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109 | my $self = new BasPlug ($class, @_);
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110 | $self->{'plugin_type'} = "HTMLPlug";
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111 | # 14-05-02 To allow for proper inheritance of arguments - John Thompson
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112 | my $option_list = $self->{'option_list'};
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113 | push( @{$option_list}, $options );
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114 |
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115 | if (!parsargv::parse(\@_,
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116 | q^nolinks^, \$self->{'nolinks'},
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117 | q^keep_head^, \$self->{'keep_head'},
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118 | q^no_metadata^, \$self->{'no_metadata'},
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119 | q^metadata_fields/.*/Title^, \$self->{'metadata_fields'},
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120 | q^hunt_creator_metadata^, \$self->{'hunt_creator_metadata'},
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121 | q^w3mir^, \$self->{'w3mir'},
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122 | q^file_is_url^, \$self->{'file_is_url'},
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123 | q^assoc_files/.*/(?i)\.(jpe?g|jpe|gif|png|css)$^, \$self->{'assoc_files'},
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124 | q^rename_assoc_files^, \$self->{'rename_assoc_files'},
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125 | q^title_sub/.*/^, \$self->{'title_sub'},
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126 | q^description_tags^, \$self->{'description_tags'},
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127 | q^no_strip_metadata_html/.*/^, \$self->{'no_strip_metadata_html'},
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128 | "allow_extra_options")) {
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129 |
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130 | print STDERR "\nIncorrect options passed to HTMLPlug, check your collect.cfg configuration file\n";
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131 | $self->print_txt_usage(""); # Use default resource bundle
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132 | die "\n";
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133 | }
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134 |
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135 | # retain this for backward compatibility (w3mir option was replaced by
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136 | # file_is_url)
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137 | if ($self->{'w3mir'}) {
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138 | $self->{'file_is_url'} = 1;
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139 | }
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140 |
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141 | $self->{'aux_files'} = {};
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142 | $self->{'dir_num'} = 0;
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143 | $self->{'file_num'} = 0;
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144 |
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145 | return bless $self, $class;
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146 | }
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147 |
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148 | # may want to use (?i)\.(gif|jpe?g|jpe|png|css|js(?:@.*)?)$
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149 | # if have eg <script language="javascript" src="img/lib.js@123">
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150 | sub get_default_block_exp {
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151 | my $self = shift (@_);
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152 |
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153 | return q^(?i)\.(gif|jpe?g|jpe|jpg|png|css)$^;
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154 | }
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155 |
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156 | sub get_default_process_exp {
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157 | my $self = shift (@_);
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158 |
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159 | # the last option is an attempt to encode the concept of an html query ...
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160 | return q^(?i)(\.html?|\.shtml|\.shm|\.asp|\.php\d?|\.cgi|.+\?.+=.*)$^;
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161 | }
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162 |
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163 | sub store_block_files
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164 | {
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165 | my $self =shift (@_);
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166 | my ($filename) = @_;
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167 | my $html_fname = $filename;
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168 | my @file_blocks;
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169 |
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170 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
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171 |
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172 | # read in file ($text will be in utf8)
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173 | my $text = "";
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174 | $self->read_file ($filename, $encoding, $language, \$text);
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175 | my $textref = \$text;
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176 | my $opencom = '(?:<!--|<!(?:—|—|--))';
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177 | my $closecom = '(?:-->|(?:—|—|--)>)';
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178 | $$textref =~ s/$opencom(.*?)$closecom//gs;
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179 |
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180 | my $attval = "\\\"[^\\\"]+\\\"|[^\\s>]+";
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181 | my @img_matches = ($$textref =~ m/<img[^>]*?src\s*=\s*($attval)[^>]*>/igs);
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182 | my @usemap_matches = ($$textref =~ m/<img[^>]*?usemap\s*=\s*($attval)[^>]*>/igs);
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183 | my @link_matches = ($$textref =~ m/<link[^>]*?href\s*=\s*($attval)[^>]*>/igs);
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184 | my @embed_matches = ($$textref =~ m/<embed[^>]*?src\s*=\s*($attval)[^>]*>/igs);
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185 | my @tabbg_matches = ($$textref =~ m/<(?:table|tr|td)[^>]*?background\s*=\s*($attval)[^>]*>/igs);
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186 |
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187 | foreach my $link (@img_matches, @usemap_matches, @link_matches, @embed_matches, @tabbg_matches) {
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188 |
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189 | # remove quotes from link at start and end if necessary
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190 | if ($link=~/^\"/) {
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191 | $link=~s/^\"//;
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192 | $link=~s/\"$//;
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193 | }
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194 |
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195 | $link =~ s/\#.*$//s; # remove any anchor names, e.g. foo.html#name becomes foo.html
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196 |
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197 | if ($link !~ m@^/@ && $link !~ m/^([A-Z]:?)\\/) {
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198 | # Turn relative file path into full path
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199 | my $dirname = &File::Basename::dirname($filename);
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200 | $link = &util::filename_cat($dirname, $link);
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201 | }
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202 | $link = $self->eval_dir_dots($link);
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203 |
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204 | $self->{'file_blocks'}->{$link} = 1;
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205 | }
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206 | }
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207 |
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208 |
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209 | # do plugin specific processing of doc_obj
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210 | sub process {
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211 | my $self = shift (@_);
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212 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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213 | my $outhandle = $self->{'outhandle'};
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214 |
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215 | print STDERR "<Processing n='$file' p='HTMLPlug'>\n" if ($gli);
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216 |
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217 | print $outhandle "HTMLPlug: processing $file\n"
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218 | if $self->{'verbosity'} > 1;
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219 |
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220 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
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221 | # this makes life so much easier... perl can cope with unix-style '/'s.
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222 | $base_dir =~ s@(\\)+@/@g;
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223 | $file =~ s@(\\)+@/@g;
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224 | }
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225 |
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226 | # reset per-doc stuff...
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227 | $self->{'aux_files'} = {};
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228 | $self->{'dir_num'} = 0;
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229 | $self->{'file_num'} = 0;
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230 |
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231 | my $cursection = $doc_obj->get_top_section();
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232 |
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233 | $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection)
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234 | unless $self->{'no_metadata'} || $self->{'description_tags'};
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235 |
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236 | # Store URL for page as metadata - this can be used for an
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237 | # altavista style search interface. The URL won't be valid
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238 | # unless the file structure contains the domain name (i.e.
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239 | # like when w3mir is used to download a website).
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240 |
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241 | # URL metadata (even invalid ones) are used to support internal
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242 | # links, so even if 'file_is_url' is off, still need to store info
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243 |
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244 | my $web_url = "http://$file";
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245 | $doc_obj->add_metadata($cursection, "URL", $web_url);
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246 |
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247 | if ($self->{'file_is_url'}) {
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248 | $doc_obj->add_metadata($cursection, "weblink", "<a href=\"$web_url\">");
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249 | $doc_obj->add_metadata($cursection, "webicon", "_iconworld_");
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250 | $doc_obj->add_metadata($cursection, "/weblink", "</a>");
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251 | }
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252 |
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253 | if ($self->{'description_tags'}) {
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254 | # remove the html header - note that doing this here means any
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255 | # sections defined within the header will be lost (so all <Section>
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256 | # tags must appear within the body of the HTML)
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257 | my ($head_keep) = ($$textref =~ m/^(.*?)<body[^>]*>/is);
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258 |
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259 | $$textref =~ s/^.*?<body[^>]*>//is;
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260 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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261 |
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262 | my $opencom = '(?:<!--|<!(?:—|—|--))';
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263 | my $closecom = '(?:-->|(?:—|—|--)>)';
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264 |
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265 | my $lt = '(?:<|<)';
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266 | my $gt = '(?:>|>)';
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267 | my $quot = '(?:"|"|”|“)';
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268 |
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269 | my $dont_strip = '';
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270 | if ($self->{'no_strip_metadata_html'}) {
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271 | ($dont_strip = $self->{'no_strip_metadata_html'}) =~ s{,}{|}g;
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272 | }
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273 |
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274 | my $found_something = 0; my $top = 1;
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275 | while ($$textref =~ s/^(.*?)$opencom(.*?)$closecom//s) {
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276 | my $text = $1;
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277 | my $comment = $2;
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278 | if (defined $text) {
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279 | # text before a comment - note that getting to here
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280 | # doesn't necessarily mean there are Section tags in
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281 | # the document
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282 | $self->process_section(\$text, $base_dir, $file, $doc_obj, $cursection);
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283 | }
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284 | while ($comment =~ s/$lt(.*?)$gt//s) {
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285 | my $tag = $1;
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286 | if ($tag eq "Section") {
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287 | $found_something = 1;
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288 | $cursection = $doc_obj->insert_section($doc_obj->get_end_child($cursection)) unless $top;
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289 | $top = 0;
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290 | } elsif ($tag eq "/Section") {
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291 | $found_something = 1;
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292 | $cursection = $doc_obj->get_parent_section ($cursection);
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293 | } elsif ($tag =~ /^Metadata name=$quot(.*?)$quot/s) {
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294 | my $metaname = $1;
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295 | my $accumulate = $tag =~ /mode=${quot}accumulate${quot}/ ? 1 : 0;
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296 | $comment =~ s/^(.*?)$lt\/Metadata$gt//s;
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297 | my $metavalue = $1;
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298 | $metavalue =~ s/^\s+//;
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299 | $metavalue =~ s/\s+$//;
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300 | # assume that no metadata value intentionally includes
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301 | # carriage returns or HTML tags (if they're there they
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302 | # were probably introduced when converting to HTML from
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303 | # some other format).
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304 | # actually some people want to have html tags in their
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305 | # metadata.
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306 | $metavalue =~ s/[\cJ\cM]/ /sg;
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307 | $metavalue =~ s/<[^>]+>//sg
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308 | unless $dont_strip && ($dont_strip eq 'all' || $metaname =~ /^($dont_strip)$/);
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309 | $metavalue =~ s/\s+/ /sg;
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310 | if ($accumulate) {
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311 | $doc_obj->add_utf8_metadata($cursection, $metaname, $metavalue);
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312 | } else {
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313 | $doc_obj->set_utf8_metadata_element($cursection, $metaname, $metavalue);
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314 | }
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315 | } elsif ($tag eq "Description" || $tag eq "/Description") {
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316 | # do nothing with containing Description tags
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317 | } else {
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318 | # simple HTML tag (probably created by the conversion
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319 | # to HTML from some other format) - we'll ignore it and
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320 | # hope for the best ;-)
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321 | }
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322 | }
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323 | }
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324 | if ($cursection ne "") {
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325 | print $outhandle "HTMLPlug: WARNING: $file contains unmatched <Section></Section> tags\n";
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326 | }
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327 |
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328 | $$textref =~ s/^.*?<body[^>]*>//is;
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329 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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330 | if ($$textref =~ /\S/) {
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331 | if (!$found_something) {
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332 | if ($self->{'verbosity'} > 2) {
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333 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags so\n";
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334 | print $outhandle " will be processed as a single section document\n";
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335 | }
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336 |
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337 | # go ahead and process single-section document
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338 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
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339 |
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340 | # if document contains no Section tags we'll go ahead
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341 | # and extract metadata (this won't have been done
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342 | # above as the -description_tags option prevents it)
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343 | my $complete_text = $head_keep.$doc_obj->get_text($cursection);
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344 | $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
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345 | unless $self->{'no_metadata'};
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346 |
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347 | } else {
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348 | print $outhandle "HTMLPlug: WARNING: $file contains the following text outside\n";
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349 | print $outhandle " of the final closing </Section> tag. This text will\n";
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350 | print $outhandle " be ignored.";
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351 |
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352 | my ($text);
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353 | if (length($$textref) > 30) {
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354 | $text = substr($$textref, 0, 30) . "...";
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355 | } else {
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356 | $text = $$textref;
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357 | }
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358 | $text =~ s/\n/ /isg;
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359 | print $outhandle " ($text)\n";
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360 | }
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361 | } elsif (!$found_something) {
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362 |
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363 | if ($self->{'verbosity'} > 2) {
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364 | # may get to here if document contained no valid Section
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365 | # tags but did contain some comments. The text will have
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366 | # been processed already but we should print the warning
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367 | # as above and extract metadata
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368 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags and\n";
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369 | print $outhandle " is blank or empty. Metadata will be assigned if present.\n";
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370 | }
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371 |
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372 | my $complete_text = $head_keep.$doc_obj->get_text($cursection);
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373 | $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
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374 | unless $self->{'no_metadata'};
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375 | }
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376 |
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377 | } else {
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378 |
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379 | # remove header and footer
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380 | if (!$self->{'keep_head'} || $self->{'description_tags'}) {
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381 | $$textref =~ s/^.*?<body[^>]*>//is;
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382 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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383 | }
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384 |
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385 | # single section document
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386 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
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387 | }
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388 | return 1;
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389 | }
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390 |
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391 | # note that process_section may be called multiple times for a single
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392 | # section (relying on the fact that add_utf8_text appends the text to any
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393 | # that may exist already).
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394 | sub process_section {
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395 | my $self = shift (@_);
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396 | my ($textref, $base_dir, $file, $doc_obj, $cursection) = @_;
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397 | # trap links
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398 | if (!$self->{'nolinks'}) {
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399 |
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400 | # usemap="./#index" not handled correctly => change to "#index"
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401 | $$textref =~ s/(<img[^>]*?usemap\s*=\s*\"?)([^\">\s]+)(\"?[^>]*>)/
|
---|
402 | $self->replace_usemap_links($1, $2, $3)/isge;
|
---|
403 |
|
---|
404 | $$textref =~ s/(<(?:a|area|frame|link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*\"?)([^\">\s]+)(\"?[^>]*>)/
|
---|
405 | $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
---|
406 | }
|
---|
407 |
|
---|
408 | # trap images
|
---|
409 |
|
---|
410 | # allow spaces if inside quotes - jrm21
|
---|
411 | $$textref =~ s/(<(?:img|embed|table|tr|td)[^>]*?(?:src|background)\s*=\s*)(\"[^\"]+\"|[^\s>]+)([^>]*>)/
|
---|
412 | $self->replace_images ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
---|
413 |
|
---|
414 | # add text to document object
|
---|
415 | # turn \ into \\ so that the rest of greenstone doesn't think there
|
---|
416 | # is an escape code following. (Macro parsing loses them...)
|
---|
417 | $$textref =~ s/\\/\\\\/go;
|
---|
418 | $doc_obj->add_utf8_text($cursection, $$textref);
|
---|
419 | }
|
---|
420 |
|
---|
421 | sub replace_images {
|
---|
422 | my $self = shift (@_);
|
---|
423 | my ($front, $link, $back, $base_dir,
|
---|
424 | $file, $doc_obj, $section) = @_;
|
---|
425 |
|
---|
426 | # remove quotes from link at start and end if necessary
|
---|
427 | if ($link=~/^\"/) {
|
---|
428 | $link=~s/^\"//;$link=~s/\"$//;
|
---|
429 | $front.='"';
|
---|
430 | $back="\"$back";
|
---|
431 | }
|
---|
432 |
|
---|
433 | $link =~ s/\n/ /g;
|
---|
434 |
|
---|
435 | # Hack to overcome Windows wv 0.7.1 bug that causes embedded images to be broken
|
---|
436 | # If the Word file path has spaces in it, wv messes up and you end up with
|
---|
437 | # absolute paths for the images, and without the "file://" prefix
|
---|
438 | # So check for this special case and massage the data to be correct
|
---|
439 | if ($ENV{'GSDLOS'} =~ /^windows/i && $self->{'plugin_type'} eq "WordPlug" && $link =~ /^[A-Za-z]\:\\/) {
|
---|
440 | $link =~ s/^.*\\([^\\]+)$/$1/;
|
---|
441 | }
|
---|
442 |
|
---|
443 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
---|
444 |
|
---|
445 | my $img_file = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
|
---|
446 |
|
---|
447 | my $anchor_name = $img_file;
|
---|
448 | $anchor_name =~ s/^.*\///;
|
---|
449 | $anchor_name = "<a name=\"$anchor_name\">";
|
---|
450 |
|
---|
451 | return $front . $img_file . $back . $anchor_name;
|
---|
452 | }
|
---|
453 |
|
---|
454 | sub replace_href_links {
|
---|
455 | my $self = shift (@_);
|
---|
456 | my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
|
---|
457 |
|
---|
458 | # attempt to sort out targets - frames are not handled
|
---|
459 | # well in this plugin and some cases will screw things
|
---|
460 | # up - e.g. the _parent target (so we'll just remove
|
---|
461 | # them all ;-)
|
---|
462 | $front =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
---|
463 | $back =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
---|
464 | $front =~ s/target=\"?_parent\"?//is;
|
---|
465 | $back =~ s/target=\"?_parent\"?//is;
|
---|
466 |
|
---|
467 | return $front . $link . $back if $link =~ /^\#/s;
|
---|
468 | $link =~ s/\n/ /g;
|
---|
469 |
|
---|
470 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
---|
471 | # href may use '\'s where '/'s should be on Windows
|
---|
472 | $href =~ s/\\/\//g;
|
---|
473 |
|
---|
474 | my ($filename) = $href =~ /^(?:.*?):(?:\/\/)?(.*)/;
|
---|
475 |
|
---|
476 |
|
---|
477 | ##### leave all these links alone (they won't be picked up by intermediate
|
---|
478 | ##### pages). I think that's safest when dealing with frames, targets etc.
|
---|
479 | ##### (at least until I think of a better way to do it). Problems occur with
|
---|
480 | ##### mailto links from within small frames, the intermediate page is displayed
|
---|
481 | ##### within that frame and can't be seen. There is still potential for this to
|
---|
482 | ##### happen even with html pages - the solution seems to be to somehow tell
|
---|
483 | ##### the browser from the server side to display the page being sent (i.e.
|
---|
484 | ##### the intermediate page) in the top level window - I'm not sure if that's
|
---|
485 | ##### possible - the following line should probably be deleted if that can be done
|
---|
486 | return $front . $link . $back if $href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/is;
|
---|
487 |
|
---|
488 |
|
---|
489 | if (($rl == 0) || ($filename =~ /$self->{'process_exp'}/) ||
|
---|
490 | ($href =~ /\/$/) || ($href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/i)) {
|
---|
491 | &ghtml::urlsafe ($href);
|
---|
492 | return $front . "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part . $back;
|
---|
493 | } else {
|
---|
494 | # link is to some other type of file (eg image) so we'll
|
---|
495 | # need to associate that file
|
---|
496 | return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
|
---|
497 | }
|
---|
498 | }
|
---|
499 |
|
---|
500 | sub add_file {
|
---|
501 | my $self = shift (@_);
|
---|
502 | my ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) = @_;
|
---|
503 | my ($newname);
|
---|
504 |
|
---|
505 | my $filename = $href;
|
---|
506 | $filename =~ s/^[^:]*:\/\///;
|
---|
507 | $filename = &util::filename_cat($base_dir, $filename);
|
---|
508 |
|
---|
509 | # Replace %20's in URL with a space if required. Note that the filename
|
---|
510 | # may include the %20 in some situations
|
---|
511 | if ($filename =~ /\%20/) {
|
---|
512 | if (!-e $filename) {
|
---|
513 | $filename =~ s/\%20/ /g;
|
---|
514 | }
|
---|
515 | }
|
---|
516 |
|
---|
517 | my ($ext) = $filename =~ /(\.[^\.]*)$/;
|
---|
518 |
|
---|
519 | if ($rl == 0) {
|
---|
520 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
---|
521 | return "_httpextlink_&rl=0&el=prompt&href=" . $href . $hash_part;
|
---|
522 | }
|
---|
523 | else {
|
---|
524 | return "_httpextlink_&rl=0&el=direct&href=" . $href . $hash_part;
|
---|
525 | }
|
---|
526 | }
|
---|
527 |
|
---|
528 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
---|
529 | return "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part;
|
---|
530 | }
|
---|
531 | if ($self->{'rename_assoc_files'}) {
|
---|
532 | if (defined $self->{'aux_files'}->{$href}) {
|
---|
533 | $newname = $self->{'aux_files'}->{$href}->{'dir_num'} . "/" .
|
---|
534 | $self->{'aux_files'}->{$href}->{'file_num'} . $ext;
|
---|
535 | } else {
|
---|
536 | $newname = $self->{'dir_num'} . "/" . $self->{'file_num'} . $ext;
|
---|
537 | $self->{'aux_files'}->{$href} = {'dir_num' => $self->{'dir_num'}, 'file_num' => $self->{'file_num'}};
|
---|
538 | $self->inc_filecount ();
|
---|
539 | }
|
---|
540 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
---|
541 | return "_httpdocimg_/$newname";
|
---|
542 | } else {
|
---|
543 | ($newname) = $filename =~ /([^\/\\]*)$/;
|
---|
544 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
---|
545 | return "_httpdocimg_/$newname";
|
---|
546 | }
|
---|
547 | }
|
---|
548 |
|
---|
549 |
|
---|
550 | sub format_link {
|
---|
551 | my $self = shift (@_);
|
---|
552 | my ($link, $base_dir, $file) = @_;
|
---|
553 |
|
---|
554 | my ($before_hash, $hash_part) = $link =~ /^([^\#]*)(\#?.*)$/;
|
---|
555 |
|
---|
556 | $hash_part = "" if !defined $hash_part;
|
---|
557 | if (!defined $before_hash || $before_hash !~ /[\w\.\/]/) {
|
---|
558 | my $outhandle = $self->{'outhandle'};
|
---|
559 | print $outhandle "HTMLPlug: ERROR - badly formatted tag ignored ($link)\n"
|
---|
560 | if $self->{'verbosity'};
|
---|
561 | return ($link, "", 0);
|
---|
562 | }
|
---|
563 |
|
---|
564 | if ($before_hash =~ s@^((?:http|ftp|file)://)@@i) {
|
---|
565 | my $type = $1;
|
---|
566 |
|
---|
567 | if ($link =~ /^(http|ftp):/i) {
|
---|
568 | # Turn url (using /) into file name (possibly using \ on windows)
|
---|
569 | my @http_dir_split = split('/', $before_hash);
|
---|
570 | $before_hash = &util::filename_cat(@http_dir_split);
|
---|
571 | }
|
---|
572 |
|
---|
573 | $before_hash = $self->eval_dir_dots($before_hash);
|
---|
574 |
|
---|
575 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
---|
576 |
|
---|
577 | my $rl = 0;
|
---|
578 | $rl = 1 if (-e $linkfilename);
|
---|
579 |
|
---|
580 | # make sure there's a slash on the end if it's a directory
|
---|
581 | if ($before_hash !~ /\/$/) {
|
---|
582 | $before_hash .= "/" if (-d $linkfilename);
|
---|
583 | }
|
---|
584 |
|
---|
585 | return ($type . $before_hash, $hash_part, $rl);
|
---|
586 |
|
---|
587 | } elsif ($link !~ /^(mailto|news|gopher|nntp|telnet|javascript):/i) {
|
---|
588 | if ($before_hash =~ s@^/@@ || $before_hash =~ /\\/) {
|
---|
589 |
|
---|
590 | # the first directory will be the domain name if file_is_url
|
---|
591 | # to generate archives, otherwise we'll assume all files are
|
---|
592 | # from the same site and base_dir is the root
|
---|
593 |
|
---|
594 | if ($self->{'file_is_url'}) {
|
---|
595 | my @dirs = split /[\/\\]/, $file;
|
---|
596 | my $domname = shift (@dirs);
|
---|
597 | $before_hash = &util::filename_cat($domname, $before_hash);
|
---|
598 | $before_hash =~ s@\\@/@g; # for windows
|
---|
599 | }
|
---|
600 | else
|
---|
601 | {
|
---|
602 | # see if link shares directory with source document
|
---|
603 | # => turn into relative link if this is so!
|
---|
604 |
|
---|
605 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
|
---|
606 | # too difficult doing a pattern match with embedded '\'s...
|
---|
607 | my $win_before_hash=$before_hash;
|
---|
608 | $win_before_hash =~ s@(\\)+@/@g;
|
---|
609 | # $base_dir is already similarly "converted" on windows.
|
---|
610 | if ($win_before_hash =~ s@^$base_dir/@@o) {
|
---|
611 | # if this is true, we removed a prefix
|
---|
612 | $before_hash=$win_before_hash;
|
---|
613 | }
|
---|
614 | }
|
---|
615 | else {
|
---|
616 | # before_hash has lost leading slash by this point,
|
---|
617 | # -> add back in prior to substitution with $base_dir
|
---|
618 | $before_hash = "/$before_hash";
|
---|
619 |
|
---|
620 | $before_hash = &util::filename_cat("",$before_hash);
|
---|
621 | $before_hash =~ s@^$base_dir/@@;
|
---|
622 | }
|
---|
623 | }
|
---|
624 | } else {
|
---|
625 | # Turn relative file path into full path
|
---|
626 | my $dirname = &File::Basename::dirname($file);
|
---|
627 | $before_hash = &util::filename_cat($dirname, $before_hash);
|
---|
628 | $before_hash = $self->eval_dir_dots($before_hash);
|
---|
629 | }
|
---|
630 |
|
---|
631 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
---|
632 | # make sure there's a slash on the end if it's a directory
|
---|
633 | if ($before_hash !~ /\/$/) {
|
---|
634 | $before_hash .= "/" if (-d $linkfilename);
|
---|
635 | }
|
---|
636 | return ("http://" . $before_hash, $hash_part, 1);
|
---|
637 | } else {
|
---|
638 | # mailto, news, nntp, telnet, javascript or gopher link
|
---|
639 | return ($before_hash, "", 0);
|
---|
640 | }
|
---|
641 | }
|
---|
642 |
|
---|
643 | sub extract_first_NNNN_characters {
|
---|
644 | my $self = shift (@_);
|
---|
645 | my ($textref, $doc_obj, $thissection) = @_;
|
---|
646 |
|
---|
647 | foreach my $size (split /,/, $self->{'first'}) {
|
---|
648 | my $tmptext = $$textref;
|
---|
649 | # skip to the body
|
---|
650 | $tmptext =~ s/.*<body[^>]*>//i;
|
---|
651 | # remove javascript
|
---|
652 | $tmptext =~ s@<script.*?</script>@ @sig;
|
---|
653 | $tmptext =~ s/<[^>]*>/ /g;
|
---|
654 | $tmptext =~ s/ / /g;
|
---|
655 | $tmptext =~ s/^\s+//;
|
---|
656 | $tmptext =~ s/\s+$//;
|
---|
657 | $tmptext =~ s/\s+/ /gs;
|
---|
658 | $tmptext = &unicode::substr ($tmptext, 0, $size);
|
---|
659 | $tmptext =~ s/\s\S*$/…/; # adds an ellipse (...)
|
---|
660 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
---|
661 | }
|
---|
662 | }
|
---|
663 |
|
---|
664 |
|
---|
665 | sub extract_metadata {
|
---|
666 | my $self = shift (@_);
|
---|
667 | my ($textref, $metadata, $doc_obj, $section) = @_;
|
---|
668 | my $outhandle = $self->{'outhandle'};
|
---|
669 | # if we don't want metadata, we may as well not be here ...
|
---|
670 | return if (!defined $self->{'metadata_fields'});
|
---|
671 |
|
---|
672 | # metadata fields to extract/save. 'key' is the (lowercase) name of the
|
---|
673 | # html meta, 'value' is the metadata name for greenstone to use
|
---|
674 | my %find_fields = ();
|
---|
675 |
|
---|
676 | my %creator_fields = (); # short-cut for lookups
|
---|
677 |
|
---|
678 |
|
---|
679 | foreach my $field (split /,/, $self->{'metadata_fields'}) {
|
---|
680 | # support tag<tagname>
|
---|
681 | if ($field =~ /^(.*?)<(.*?)>$/) {
|
---|
682 | # "$2" is the user's preferred gs metadata name
|
---|
683 | $find_fields{lc($1)}=$2; # lc = lowercase
|
---|
684 | } else { # no <tagname> for mapping
|
---|
685 | # "$field" is the user's preferred gs metadata name
|
---|
686 | $find_fields{lc($field)}=$field; # lc = lowercase
|
---|
687 | }
|
---|
688 | }
|
---|
689 |
|
---|
690 | if (defined $self->{'hunt_creator_metadata'} &&
|
---|
691 | $self->{'hunt_creator_metadata'} == 1 ) {
|
---|
692 | my @extra_fields =
|
---|
693 | (
|
---|
694 | 'author',
|
---|
695 | 'author.email',
|
---|
696 | 'creator',
|
---|
697 | 'dc.creator',
|
---|
698 | 'dc.creator.corporatename',
|
---|
699 | );
|
---|
700 |
|
---|
701 | # add the creator_metadata fields to search for
|
---|
702 | foreach my $field (@extra_fields) {
|
---|
703 | $creator_fields{$field}=0; # add to lookup hash
|
---|
704 | }
|
---|
705 | }
|
---|
706 |
|
---|
707 |
|
---|
708 | # find the header in the html file, which has the meta tags
|
---|
709 | $$textref =~ m@<head>(.*?)</head>@si;
|
---|
710 |
|
---|
711 | my $html_header=$1;
|
---|
712 | # go through every <meta... tag defined in the html and see if it is
|
---|
713 | # one of the tags we want to match.
|
---|
714 |
|
---|
715 | # special case for title - we want to remember if its been found
|
---|
716 | my $found_title = 0;
|
---|
717 | # this assumes that ">" won't appear. (I don't think it's allowed to...)
|
---|
718 | $html_header =~ /^/; # match the start of the string, for \G assertion
|
---|
719 |
|
---|
720 | while ($html_header =~ m/\G.*?<meta(.*?)>/sig) {
|
---|
721 | my $metatag=$1;
|
---|
722 | my ($tag, $value);
|
---|
723 |
|
---|
724 | # find the tag name
|
---|
725 | $metatag =~ /(?:name|http-equiv)\s*=\s*([\"\'])?(.*?)\1/is;
|
---|
726 | $tag=$2;
|
---|
727 | # in case they're not using " or ', but they should...
|
---|
728 | if (! $tag) {
|
---|
729 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
---|
730 | $tag=$1;
|
---|
731 | }
|
---|
732 |
|
---|
733 | if (!defined $tag) {
|
---|
734 | print $outhandle "HTMLPlug: can't find NAME in \"$metatag\"\n";
|
---|
735 | next;
|
---|
736 | }
|
---|
737 |
|
---|
738 | # don't need to assign this field if it was passed in from a previous
|
---|
739 | # (recursive) plugin
|
---|
740 | if (defined $metadata->{$tag}) {next}
|
---|
741 |
|
---|
742 | # find the tag content
|
---|
743 | $metatag =~ /content\s*=\s*([\"\'])?(.*?)\1/is;
|
---|
744 | $value=$2;
|
---|
745 | if (! $value) {
|
---|
746 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
---|
747 | $value=$1;
|
---|
748 | }
|
---|
749 | if (!defined $value) {
|
---|
750 | print $outhandle "HTMLPlug: can't find VALUE in \"$metatag\"\n";
|
---|
751 | next;
|
---|
752 | }
|
---|
753 |
|
---|
754 | # clean up and add
|
---|
755 | $value =~ s/\s+/ /gs;
|
---|
756 | chomp($value); # remove trailing \n, if any
|
---|
757 | if (exists $creator_fields{lc($tag)}) {
|
---|
758 | # map this value onto greenstone's "Creator" metadata
|
---|
759 | $tag='Creator';
|
---|
760 | } elsif (!exists $find_fields{lc($tag)}) {
|
---|
761 | next; # don't want this tag
|
---|
762 | } else {
|
---|
763 | # get the user's preferred capitalisation
|
---|
764 | $tag = $find_fields{lc($tag)};
|
---|
765 | }
|
---|
766 | if (lc($tag) eq "title") {
|
---|
767 | $found_title = 1;
|
---|
768 | }
|
---|
769 | print $outhandle " extracted \"$tag\" metadata \"$value\"\n"
|
---|
770 | if ($self->{'verbosity'} > 2);
|
---|
771 | $doc_obj->add_utf8_metadata($section, $tag, $value);
|
---|
772 |
|
---|
773 | }
|
---|
774 |
|
---|
775 | # TITLE: extract the document title
|
---|
776 | if (exists $find_fields{'title'} && !$found_title) {
|
---|
777 | # we want a title, and didn't find one in the meta tags
|
---|
778 | # see if there's a <title> tag
|
---|
779 | my $title;
|
---|
780 | my $from = ""; # for debugging output only
|
---|
781 | if ($html_header =~ /<title[^>]*>([^<]+)<\/title[^>]*>/is) {
|
---|
782 | $title = $1;
|
---|
783 | $from = "<title> tags";
|
---|
784 | }
|
---|
785 |
|
---|
786 | if (!defined $title) {
|
---|
787 | $from = "first 100 chars";
|
---|
788 | # if no title use first 100 or so characters
|
---|
789 | $title = $$textref;
|
---|
790 | $title =~ s/^\xFE\xFF//; # Remove unicode byte order mark
|
---|
791 | $title =~ s/^.*?<body>//si;
|
---|
792 | # ignore javascript!
|
---|
793 | $title =~ s@<script.*?</script>@ @sig;
|
---|
794 | $title =~ s/<\/([^>]+)><\1>//g; # (eg) </b><b> - no space
|
---|
795 | $title =~ s/<[^>]*>/ /g; # remove all HTML tags
|
---|
796 | $title = substr ($title, 0, 100);
|
---|
797 | $title =~ s/\s\S*$/.../;
|
---|
798 | }
|
---|
799 | $title =~ s/<[^>]*>/ /g; # remove html tags
|
---|
800 | $title =~ s/ / /g;
|
---|
801 | $title =~ s/(?: |\xc2\xa0)/ /g; # utf-8 for nbsp...
|
---|
802 | $title =~ s/\s+/ /gs; # collapse multiple spaces
|
---|
803 | $title =~ s/^\s*//; # remove leading spaces
|
---|
804 | $title =~ s/\s*$//; # remove trailing spaces
|
---|
805 |
|
---|
806 | $title =~ s/^$self->{'title_sub'}// if ($self->{'title_sub'});
|
---|
807 | $title =~ s/^\s+//s; # in case title_sub introduced any...
|
---|
808 | $doc_obj->add_utf8_metadata ($section, 'Title', $title);
|
---|
809 | print $outhandle " extracted Title metadata \"$title\" from $from\n"
|
---|
810 | if ($self->{'verbosity'} > 2);
|
---|
811 | }
|
---|
812 |
|
---|
813 | # add FileFormat metadata
|
---|
814 | $doc_obj->add_metadata($section,"FileFormat", "HTML");
|
---|
815 |
|
---|
816 | # Special, for metadata names such as tagH1 - extracts
|
---|
817 | # the text between the first <H1> and </H1> tags into "H1" metadata.
|
---|
818 |
|
---|
819 | foreach my $field (keys %find_fields) {
|
---|
820 | if ($field !~ /^tag([a-z0-9]+)$/i) {next}
|
---|
821 | my $tag = $1;
|
---|
822 | if ($$textref =~ m@<$tag[^>]*>(.*?)</$tag[^>]*>@g) {
|
---|
823 | my $content = $1;
|
---|
824 | $content =~ s/ / /g;
|
---|
825 | $content =~ s/<[^>]*>/ /g;
|
---|
826 | $content =~ s/^\s+//;
|
---|
827 | $content =~ s/\s+$//;
|
---|
828 | $content =~ s/\s+/ /gs;
|
---|
829 | if ($content) {
|
---|
830 | $tag=$find_fields{"tag$tag"}; # get the user's capitalisation
|
---|
831 | $tag =~ s/^tag//i;
|
---|
832 | $doc_obj->add_utf8_metadata ($section, $tag, $content);
|
---|
833 | print $outhandle " extracted \"$tag\" metadata \"$content\"\n"
|
---|
834 | if ($self->{'verbosity'} > 2);
|
---|
835 | }
|
---|
836 | }
|
---|
837 | }
|
---|
838 | }
|
---|
839 |
|
---|
840 |
|
---|
841 | # evaluate any "../" to next directory up
|
---|
842 | # evaluate any "./" as here
|
---|
843 | sub eval_dir_dots {
|
---|
844 | my $self = shift (@_);
|
---|
845 | my ($filename) = @_;
|
---|
846 | my $dirsep_os = &util::get_os_dirsep();
|
---|
847 | my @dirsep = split(/$dirsep_os/,$filename);
|
---|
848 |
|
---|
849 | my @eval_dirs = ();
|
---|
850 | foreach my $d (@dirsep) {
|
---|
851 | if ($d eq "..") {
|
---|
852 | pop(@eval_dirs);
|
---|
853 |
|
---|
854 | } elsif ($d eq ".") {
|
---|
855 | # do nothing!
|
---|
856 |
|
---|
857 | } else {
|
---|
858 | push(@eval_dirs,$d);
|
---|
859 | }
|
---|
860 | }
|
---|
861 |
|
---|
862 | # Need to fiddle with number of elements in @eval_dirs if the
|
---|
863 | # first one is the empty string. This is because of a
|
---|
864 | # modification to util::filename_cat that supresses the addition
|
---|
865 | # of a leading '/' character (or \ if windows) (intended to help
|
---|
866 | # filename cat with relative paths) if the first entry in the
|
---|
867 | # array is the empty string. Making the array start with *two*
|
---|
868 | # empty strings is a way to defeat this "smart" option.
|
---|
869 | #
|
---|
870 | if (scalar(@eval_dirs) > 0) {
|
---|
871 | if ($eval_dirs[0] eq ""){
|
---|
872 | unshift(@eval_dirs,"");
|
---|
873 | }
|
---|
874 | }
|
---|
875 | return &util::filename_cat(@eval_dirs);
|
---|
876 | }
|
---|
877 |
|
---|
878 | sub replace_usemap_links {
|
---|
879 | my $self = shift (@_);
|
---|
880 | my ($front, $link, $back) = @_;
|
---|
881 |
|
---|
882 | $link =~ s/^\.\///;
|
---|
883 | return $front . $link . $back;
|
---|
884 | }
|
---|
885 |
|
---|
886 | sub inc_filecount {
|
---|
887 | my $self = shift (@_);
|
---|
888 |
|
---|
889 | if ($self->{'file_num'} == 1000) {
|
---|
890 | $self->{'dir_num'} ++;
|
---|
891 | $self->{'file_num'} = 0;
|
---|
892 | } else {
|
---|
893 | $self->{'file_num'} ++;
|
---|
894 | }
|
---|
895 | }
|
---|
896 |
|
---|
897 |
|
---|
898 | # Extend the BasPlug read_file so that strings like é are
|
---|
899 | # converted to UTF8 internally.
|
---|
900 | #
|
---|
901 | # We don't convert < or > or & or " in case
|
---|
902 | # they interfere with the GML files
|
---|
903 |
|
---|
904 | sub read_file {
|
---|
905 | my ($self, $filename, $encoding, $language, $textref) = @_;
|
---|
906 |
|
---|
907 | &BasPlug::read_file($self, $filename, $encoding, $language, $textref);
|
---|
908 |
|
---|
909 | # Convert entities to their UTF8 equivalents
|
---|
910 | $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
|
---|
911 | $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1)/gseo;
|
---|
912 | $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
|
---|
913 | }
|
---|
914 |
|
---|
915 | 1;
|
---|