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 XMLParser;
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43 |
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44 | use Image::Size;
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45 |
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46 | sub BEGIN {
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47 | @HTMLPlug::ISA = ('BasPlug');
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48 | }
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49 |
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50 | use strict; # every perl program should have this!
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51 | no strict 'refs'; # make an exception so we can use variables as filehandles
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52 |
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53 | my $arguments =
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54 | [ { 'name' => "process_exp",
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55 | 'desc' => "{BasPlug.process_exp}",
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56 | 'type' => "regexp",
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57 | 'deft' => &get_default_process_exp() },
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58 | { 'name' => "block_exp",
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59 | 'desc' => "{BasPlug.block_exp}",
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60 | 'type' => 'regexp',
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61 | 'deft' => &get_default_block_exp() },
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62 | { 'name' => "nolinks",
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63 | 'desc' => "{HTMLPlug.nolinks}",
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64 | 'type' => "flag" },
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65 | { 'name' => "keep_head",
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66 | 'desc' => "{HTMLPlug.keep_head}",
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67 | 'type' => "flag" },
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68 | { 'name' => "no_metadata",
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69 | 'desc' => "{HTMLPlug.no_metadata}",
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70 | 'type' => "flag" },
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71 | { 'name' => "metadata_fields",
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72 | 'desc' => "{HTMLPlug.metadata_fields}",
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73 | 'type' => "string",
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74 | 'deft' => "Title" },
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75 | { 'name' => "hunt_creator_metadata",
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76 | 'desc' => "{HTMLPlug.hunt_creator_metadata}",
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77 | 'type' => "flag" },
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78 | { 'name' => "file_is_url",
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79 | 'desc' => "{HTMLPlug.file_is_url}",
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80 | 'type' => "flag" },
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81 | { 'name' => "assoc_files",
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82 | 'desc' => "{HTMLPlug.assoc_files}",
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83 | 'type' => "regexp",
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84 | 'deft' => &get_default_block_exp() },
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85 | { 'name' => "rename_assoc_files",
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86 | 'desc' => "{HTMLPlug.rename_assoc_files}",
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87 | 'type' => "flag" },
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88 | { 'name' => "title_sub",
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89 | 'desc' => "{HTMLPlug.title_sub}",
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90 | 'type' => "string",
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91 | 'deft' => "" },
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92 | { 'name' => "description_tags",
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93 | 'desc' => "{HTMLPlug.description_tags}",
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94 | 'type' => "flag" },
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95 | # retain this for backward compatibility (w3mir option was replaced by
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96 | # file_is_url)
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97 | { 'name' => "w3mir",
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98 | # 'desc' => "{HTMLPlug.w3mir}",
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99 | 'type' => "flag",
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100 | 'hiddengli' => "yes"},
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101 | { 'name' => "no_strip_metadata_html",
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102 | 'desc' => "{HTMLPlug.no_strip_metadata_html}",
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103 | 'type' => "string",
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104 | 'deft' => "",
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105 | 'reqd' => "no"},
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106 | { 'name' => "sectionalise_using_h_tags",
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107 | 'desc' => "{HTMLPlug.sectionalise_using_h_tags}",
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108 | 'type' => "flag" },
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109 | { 'name' => "tidy_html",
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110 | 'desc' => "{HTMLPlug.tidy_html}",
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111 | 'type' => "flag"},
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112 | { 'name' => "old_style_HDL",
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113 | 'desc' => "{HTMLPlug.old_style_HDL}",
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114 | 'type' => "flag"}
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115 | ];
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116 |
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117 | my $options = { 'name' => "HTMLPlug",
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118 | 'desc' => "{HTMLPlug.desc}",
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119 | 'abstract' => "no",
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120 | 'inherits' => "yes",
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121 | 'args' => $arguments };
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122 |
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123 |
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124 | sub HB_read_html_file {
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125 | my $self = shift (@_);
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126 | my ($htmlfile, $text) = @_;
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127 |
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128 | # load in the file
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129 | if (!open (FILE, $htmlfile)) {
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130 | print STDERR "ERROR - could not open $htmlfile\n";
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131 | return;
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132 | }
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133 |
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134 | my $foundbody = 0;
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135 | $self->HB_gettext (\$foundbody, $text, "FILE");
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136 | close FILE;
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137 |
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138 | # just in case there was no <body> tag
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139 | if (!$foundbody) {
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140 | $foundbody = 1;
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141 | open (FILE, $htmlfile) || return;
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142 | $self->HB_gettext (\$foundbody, $text, "FILE");
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143 | close FILE;
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144 | }
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145 | # text is in utf8
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146 | }
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147 |
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148 | # converts the text to utf8, as ghtml does that for é etc.
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149 | sub HB_gettext {
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150 | my $self = shift (@_);
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151 | my ($foundbody, $text, $handle) = @_;
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152 |
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153 | my $line = "";
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154 | while (defined ($line = <$handle>)) {
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155 | # look for body tag
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156 | if (!$$foundbody) {
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157 | if ($line =~ s/^.*<body[^>]*>//i) {
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158 | $$foundbody = 1;
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159 | } else {
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160 | next;
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161 | }
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162 | }
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163 |
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164 | # check for symbol fonts
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165 | if ($line =~ /<font [^>]*?face\s*=\s*\"?(\w+)\"?/i) {
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166 | my $font = $1;
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167 | print STDERR "HBPlug::HB_gettext - warning removed font $font\n"
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168 | if ($font !~ /^arial$/i);
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169 | }
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170 |
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171 | $$text .= $line;
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172 | }
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173 |
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174 | if ($self->{'input_encoding'} eq "iso_8859_1") {
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175 | # convert to utf-8
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176 | $$text=&unicode::unicode2utf8(&unicode::convert2unicode("iso_8859_1", $text));
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177 | }
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178 | # convert any alphanumeric character entities to their utf-8
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179 | # equivalent for indexing purposes
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180 | #&ghtml::convertcharentities ($$text);
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181 |
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182 | $$text =~ s/\s+/ /g; # remove \n's
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183 | }
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184 |
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185 | sub HB_clean_section {
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186 | my $self = shift (@_);
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187 | my ($section) = @_;
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188 |
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189 | # remove tags without a starting tag from the section
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190 | my ($tag, $tagstart);
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191 | while ($section =~ /<\/([^>]{1,10})>/) {
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192 | $tag = $1;
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193 | $tagstart = index($section, "<$tag");
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194 | last if (($tagstart >= 0) && ($tagstart < index($section, "<\/$tag")));
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195 | $section =~ s/<\/$tag>//;
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196 | }
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197 |
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198 | # remove extra paragraph tags
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199 | while ($section =~ s/<p\b[^>]*>\s*<p\b/<p/ig) {}
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200 |
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201 | # remove extra stuff at the end of the section
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202 | while ($section =~ s/(<u>|<i>|<b>|<p\b[^>]*>| |\s)$//i) {}
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203 |
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204 | # add a newline at the beginning of each paragraph
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205 | $section =~ s/(.)\s*<p\b/$1\n\n<p/gi;
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206 |
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207 | # add a newline every 80 characters at a word boundary
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208 | # Note: this regular expression puts a line feed before
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209 | # the last word in each section, even when it is not
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210 | # needed.
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211 | $section =~ s/(.{1,80})\s/$1\n/g;
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212 |
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213 | # fix up the image links
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214 | $section =~ s/<img[^>]*?src=\"?([^\">]+)\"?[^>]*>/
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215 | <center><img src=\"$1\" \/><\/center><br\/>/ig;
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216 | $section =~ s/<<I>>\s*([^\.]+\.(png|jpg|gif))/
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217 | <center><img src=\"$1\" \/><\/center><br\/>/ig;
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218 |
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219 | return $section;
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220 | }
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221 |
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222 | # Will convert the oldHDL format to the new HDL format (using the Section tag)
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223 | sub convert_to_newHDLformat
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224 | {
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225 | my $self = shift (@_);
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226 | my ($file,$cnfile) = @_;
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227 | my $input_filename = $file;
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228 | my $tmp_filename = $cnfile;
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229 |
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230 | # write HTML tmp file with new HDL format
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231 | open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
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232 |
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233 | # read in the file and do basic html cleaning (removing header etc)
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234 | my $html = "";
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235 | $self->HB_read_html_file ($input_filename, \$html);
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236 |
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237 | # process the file one section at a time
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238 | my $curtoclevel = 1;
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239 | my $firstsection = 1;
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240 | my $toclevel = 0;
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241 | while (length ($html) > 0) {
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242 | if ($html =~ s/^.*?(?:<p\b[^>]*>)?((<b>|<i>|<u>|\s)*)<<TOC(\d+)>>\s*(.*?)<p\b/<p/i) {
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243 | $toclevel = $3;
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244 | my $title = $4;
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245 | my $sectiontext = "";
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246 | if ($html =~ s/^(.*?)((?:<p\b[^>]*>)?((<b>|<i>|<u>|\s)*)<<TOC\d+>>)/$2/i) {
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247 | $sectiontext = $1;
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248 | } else {
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249 | $sectiontext = $html;
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250 | $html = "";
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251 | }
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252 |
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253 | # remove tags and extra spaces from the title
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254 | $title =~ s/<\/?[^>]+>//g;
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255 | $title =~ s/^\s+|\s+$//g;
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256 |
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257 | # close any sections below the current level and
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258 | # create a new section (special case for the firstsection)
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259 | print PROD "<!--\n";
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260 | while (($curtoclevel > $toclevel) ||
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261 | (!$firstsection && $curtoclevel == $toclevel)) {
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262 | $curtoclevel--;
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263 | print PROD "</Section>\n";
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264 | }
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265 | if ($curtoclevel+1 < $toclevel) {
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266 | print STDERR "WARNING - jump in toc levels in $input_filename " .
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267 | "from $curtoclevel to $toclevel\n";
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268 | }
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269 | while ($curtoclevel < $toclevel) {
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270 | $curtoclevel++;
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271 | }
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272 |
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273 | if ($curtoclevel == 1) {
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274 | # add the header tag
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275 | print PROD "-->\n";
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276 | print PROD "<HTML>\n<HEAD>\n<TITLE>$title</TITLE>\n</HEAD>\n<BODY>\n";
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277 | print PROD "<!--\n";
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278 | }
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279 |
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280 | print PROD "<Section>\n\t<Description>\n\t\t<Metadata name=\"Title\">$title</Metadata>\n\t</Description>\n";
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281 |
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282 | print PROD "-->\n";
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283 |
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284 | # clean up the section html
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285 | $sectiontext = $self->HB_clean_section($sectiontext);
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286 |
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287 | print PROD "$sectiontext\n";
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288 |
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289 | } else {
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290 | print STDERR "WARNING - leftover text\n" , $self->shorten($html),
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291 | "\nin $input_filename\n";
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292 | last;
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293 | }
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294 | $firstsection = 0;
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295 | }
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296 |
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297 | print PROD "<!--\n";
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298 | while ($curtoclevel > 0) {
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299 | $curtoclevel--;
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300 | print PROD "</Section>\n";
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301 | }
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302 | print PROD "-->\n";
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303 |
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304 | close (PROD) || die("Error Closing File: $tmp_filename $!");
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305 |
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306 | return $tmp_filename;
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307 | }
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308 |
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309 | sub shorten {
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310 | my $self = shift (@_);
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311 | my ($text) = @_;
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312 |
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313 | return "\"$text\"" if (length($text) < 100);
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314 |
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315 | return "\"" . substr ($text, 0, 50) . "\" ... \"" .
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316 | substr ($text, length($text)-50) . "\"";
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317 | }
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318 |
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319 | sub convert_tidy_or_oldHDL_file
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320 | {
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321 | my $self = shift (@_);
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322 | my ($file) = @_;
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323 | my $input_filename = $file;
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324 |
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325 | if (-d $input_filename)
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326 | {
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327 | return $input_filename;
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328 | }
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329 |
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330 | # get the input filename
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331 | my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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332 | my $base_dirname = $dirname;
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333 | $suffix = lc($suffix);
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334 |
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335 | # derive tmp filename from input filename
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336 | # Remove any white space from filename -- no risk of name collision, and
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337 | # makes later conversion by utils simpler. Leave spaces in path...
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338 | # tidy up the filename with space, dot, hyphen between
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339 | $tailname =~ s/\s+//g;
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340 | $tailname =~ s/\.+//g;
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341 | $tailname =~ s/\-+//g;
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342 | # convert to utf-8 otherwise we have problems with the doc.xml file
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343 | # later on
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344 | &unicode::ensure_utf8(\$tailname);
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345 |
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346 | # softlink to collection tmp dir
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347 | my $tmp_dirname = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "tidytmp");
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348 | &util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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349 |
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350 | my $test_dirname = "";
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351 | if ($dirname =~ /import\//)
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352 | {
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353 | $test_dirname = $';
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354 |
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355 | #print STDERR "init $'\n";
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356 |
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357 | while ($test_dirname =~ /[\/]/)
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358 | {
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359 | my $folderdirname = $`;
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360 | $tmp_dirname = &util::filename_cat($tmp_dirname,$folderdirname);
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361 | &util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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362 | $test_dirname = $';
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363 | #print STDERR "folder $`\n";
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364 | }
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365 |
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366 | #my $folderdirname = $';
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367 | #$tmp_dirname = &util::filename_cat($tmp_dirname,$folderdirname);
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368 | #&util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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369 | #print STDERR "folderdirnae $'\n";
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370 |
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371 | #$test_dirname =~ s/[\\\/]+$//;
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372 | #print STDERR "$'";
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373 | }
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374 |
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375 | # remove trailing slashes
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376 | #$dirname =~ s/[\\\/]+$//;
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377 | # create folder for this file
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378 | #my $folderdirname = &File::Basename::basename($dirname);
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379 | #my $folderdirname = $test_dirname;
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380 | #$tmp_dirname = &util::filename_cat($tmp_dirname,$folderdirname);
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381 | #&util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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382 |
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383 | my $tmp_filename = &util::filename_cat($tmp_dirname, "$tailname$suffix");
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384 |
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385 | # tidy or convert the input file if it is a HTML-like file or it is accepted by the process_exp
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386 | if (($suffix eq ".htm") || ($suffix eq ".html") || ($suffix eq ".shtml"))
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387 | {
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388 | #convert the input file to a new style HDL
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389 | my $hdl_output_filename = $input_filename;
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390 | if ($self->{'old_style_HDL'})
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391 | {
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392 | $hdl_output_filename = &util::filename_cat($tmp_dirname, "$tailname$suffix");
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393 | $hdl_output_filename = $self->convert_to_newHDLformat($input_filename,$hdl_output_filename);
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394 | }
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395 |
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396 | #just for checking copy all other file from the base dir to tmp dir if it is not exists
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397 | opendir(DIR,$base_dirname) or die "Can't open base directory : $base_dirname!";
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398 | my @files = grep {!/^\.+$/} readdir(DIR);
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399 | close(DIR);
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400 |
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401 | foreach my $file (@files)
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402 | {
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403 | my $src_file = &util::filename_cat($base_dirname,$file);
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404 | my $dest_file = &util::filename_cat($tmp_dirname,$file);
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405 | if ((!-e $dest_file) && (!-d $src_file))
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406 | {
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407 | # just copy the original file back to the tmp directory
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408 | open (TIDYIN, "< $src_file") or die "Can't open $src_file : $!";
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409 | open (TIDYOUT, "> $dest_file") or die "Can't open $dest_file : $!";
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410 | print TIDYOUT <TIDYIN>;
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411 | close TIDYIN;
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412 | close TIDYOUT;
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413 | }
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414 | }
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415 |
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416 | # tidy the input file
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417 | my $tidy_output_filename = $hdl_output_filename;
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418 | if ($self->{'tidy_html'})
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419 | {
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420 | $tidy_output_filename = &util::filename_cat($tmp_dirname, "$tailname$suffix");
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421 | $tidy_output_filename = $self->tmp_tidy_file($hdl_output_filename,$tidy_output_filename);
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422 | }
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423 | $tmp_filename = $tidy_output_filename;
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424 | }
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425 | else
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426 | {
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427 | if (!-e $tmp_filename)
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428 | {
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429 | # just copy the original file back to the tmp directory
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430 | open (TIDYIN, "< $input_filename") or die "Can't open $input_filename : $!";
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431 | open (TIDYOUT, "> $tmp_filename") or die "Can't open $tmp_filename : $!";
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432 | print TIDYOUT <TIDYIN>;
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433 | close TIDYIN;
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434 | close TIDYOUT;
|
---|
435 | }
|
---|
436 | }
|
---|
437 |
|
---|
438 | return $tmp_filename;
|
---|
439 | }
|
---|
440 |
|
---|
441 |
|
---|
442 | # Will make the html input file as a proper XML file with removed font tag and
|
---|
443 | # image size added to the img tag.
|
---|
444 | # The tidying process takes place in a collection specific 'tmp' directory so
|
---|
445 | # that we don't accidentally damage the input.
|
---|
446 | sub tmp_tidy_file
|
---|
447 | {
|
---|
448 | my $self = shift (@_);
|
---|
449 | my ($file,$cnfile) = @_;
|
---|
450 | my $input_filename = $file;
|
---|
451 | my $tmp_filename = $cnfile;
|
---|
452 |
|
---|
453 | # get the input filename
|
---|
454 | my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
|
---|
455 |
|
---|
456 | require HTML::TokeParser::Simple;
|
---|
457 |
|
---|
458 | # create HTML parser to decode the input file
|
---|
459 | my $parser = HTML::TokeParser::Simple->new($input_filename);
|
---|
460 |
|
---|
461 | # write HTML tmp file without the font tag and image size are added to the img tag
|
---|
462 | open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
|
---|
463 | while (my $token = $parser->get_token())
|
---|
464 | {
|
---|
465 | # is it an img tag
|
---|
466 | if ($token->is_start_tag('img'))
|
---|
467 | {
|
---|
468 | # get the attributes
|
---|
469 | my $attr = $token->return_attr;
|
---|
470 |
|
---|
471 | # get the full path to the image
|
---|
472 | my $img_file = &util::filename_cat($dirname,$attr->{src});
|
---|
473 |
|
---|
474 | # set the width and height attribute
|
---|
475 | ($attr->{width}, $attr->{height}) = imgsize($img_file);
|
---|
476 |
|
---|
477 | # recreate the tag
|
---|
478 | print PROD "<img";
|
---|
479 | print PROD map { qq { $_="$attr->{$_}"} } keys %$attr;
|
---|
480 | print PROD ">";
|
---|
481 | }
|
---|
482 | # is it a font tag
|
---|
483 | else
|
---|
484 | {
|
---|
485 | if (($token->is_start_tag('font')) || ($token->is_end_tag('font')))
|
---|
486 | {
|
---|
487 | # remove font tag
|
---|
488 | print PROD "";
|
---|
489 | }
|
---|
490 | else
|
---|
491 | {
|
---|
492 | # print without changes
|
---|
493 | print PROD $token->as_is;
|
---|
494 | }
|
---|
495 | }
|
---|
496 | }
|
---|
497 | close (PROD) || die("Error Closing File: $tmp_filename $!");
|
---|
498 |
|
---|
499 | # run html-tidy on the tmp file to make it a proper XML file
|
---|
500 | my $tidyfile = `tidy -wrap 0 -asxml $tmp_filename`;
|
---|
501 |
|
---|
502 | # write result back to the tmp file
|
---|
503 | open (PROD, ">$tmp_filename") || die("Error Writing to File: $tmp_filename $!");
|
---|
504 | print PROD $tidyfile;
|
---|
505 | close (PROD) || die("Error Closing File: $tmp_filename $!");
|
---|
506 |
|
---|
507 | # return the output filename
|
---|
508 | return $tmp_filename;
|
---|
509 | }
|
---|
510 |
|
---|
511 | sub read_into_doc_obj
|
---|
512 | {
|
---|
513 | my $self = shift (@_);
|
---|
514 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
515 |
|
---|
516 | # check the process_exp and block_exp thing
|
---|
517 | my ($block_status,$filename) = $self->read_block(@_);
|
---|
518 | return $block_status if ((!defined $block_status) || ($block_status==0));
|
---|
519 |
|
---|
520 | # get the input file
|
---|
521 | my $input_filename = $file;
|
---|
522 | my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
|
---|
523 | $suffix = lc($suffix);
|
---|
524 |
|
---|
525 | if (($self->{'tidy_html'}) || ($self->{'old_style_HDL'}))
|
---|
526 | {
|
---|
527 | # set the file to be tidied
|
---|
528 | $input_filename = &util::filename_cat($base_dir,$file) if $base_dir =~ /\w/;
|
---|
529 |
|
---|
530 | # get the tidied file
|
---|
531 | #my $tidy_filename = $self->tmp_tidy_file($input_filename);
|
---|
532 | my $tidy_filename = $self->convert_tidy_or_oldHDL_file($input_filename);
|
---|
533 |
|
---|
534 | # derive tmp filename from input filename
|
---|
535 | my ($tailname, $dirname, $suffix) = &File::Basename::fileparse($tidy_filename, "\\.[^\\.]+\$");
|
---|
536 |
|
---|
537 | # set the new input file and base_dir to be from the tidied file
|
---|
538 | $file = "$tailname$suffix";
|
---|
539 | $base_dir = $dirname;
|
---|
540 | }
|
---|
541 |
|
---|
542 | # call the parent read_into_doc_obj
|
---|
543 | my ($process_status,$doc_obj) = &BasPlug::read_into_doc_obj($self,$pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli);
|
---|
544 |
|
---|
545 | return ($process_status,$doc_obj);
|
---|
546 | }
|
---|
547 |
|
---|
548 | sub new {
|
---|
549 | my ($class) = shift (@_);
|
---|
550 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
|
---|
551 | push(@$pluginlist, $class);
|
---|
552 |
|
---|
553 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
|
---|
554 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
|
---|
555 |
|
---|
556 |
|
---|
557 | my $self = (defined $hashArgOptLists)? new BasPlug($pluginlist,$inputargs,$hashArgOptLists): new BasPlug($pluginlist,$inputargs);
|
---|
558 |
|
---|
559 | if ($self->{'w3mir'}) {
|
---|
560 | $self->{'file_is_url'} = 1;
|
---|
561 | }
|
---|
562 | $self->{'aux_files'} = {};
|
---|
563 | $self->{'dir_num'} = 0;
|
---|
564 | $self->{'file_num'} = 0;
|
---|
565 |
|
---|
566 | return bless $self, $class;
|
---|
567 | }
|
---|
568 |
|
---|
569 | # may want to use (?i)\.(gif|jpe?g|jpe|png|css|js(?:@.*)?)$
|
---|
570 | # if have eg <script language="javascript" src="img/lib.js@123">
|
---|
571 | sub get_default_block_exp {
|
---|
572 | my $self = shift (@_);
|
---|
573 |
|
---|
574 | return q^(?i)\.(gif|jpe?g|jpe|jpg|png|css)$^;
|
---|
575 | }
|
---|
576 |
|
---|
577 | sub get_default_process_exp {
|
---|
578 | my $self = shift (@_);
|
---|
579 |
|
---|
580 | # the last option is an attempt to encode the concept of an html query ...
|
---|
581 | return q^(?i)(\.html?|\.shtml|\.shm|\.asp|\.php\d?|\.cgi|.+\?.+=.*)$^;
|
---|
582 | }
|
---|
583 |
|
---|
584 | sub store_block_files
|
---|
585 | {
|
---|
586 | my $self =shift (@_);
|
---|
587 | my ($filename) = @_;
|
---|
588 | my $html_fname = $filename;
|
---|
589 | my @file_blocks;
|
---|
590 |
|
---|
591 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
|
---|
592 |
|
---|
593 | # read in file ($text will be in utf8)
|
---|
594 | my $text = "";
|
---|
595 | $self->read_file ($filename, $encoding, $language, \$text);
|
---|
596 | my $textref = \$text;
|
---|
597 | my $opencom = '(?:<!--|<!(?:—|—|--))';
|
---|
598 | my $closecom = '(?:-->|(?:—|—|--)>)';
|
---|
599 | $$textref =~ s/$opencom(.*?)$closecom//gs;
|
---|
600 |
|
---|
601 | my $attval = "\\\"[^\\\"]+\\\"|[^\\s>]+";
|
---|
602 | my @img_matches = ($$textref =~ m/<img[^>]*?src\s*=\s*($attval)[^>]*>/igs);
|
---|
603 | my @usemap_matches = ($$textref =~ m/<img[^>]*?usemap\s*=\s*($attval)[^>]*>/igs);
|
---|
604 | my @link_matches = ($$textref =~ m/<link[^>]*?href\s*=\s*($attval)[^>]*>/igs);
|
---|
605 | my @embed_matches = ($$textref =~ m/<embed[^>]*?src\s*=\s*($attval)[^>]*>/igs);
|
---|
606 | my @tabbg_matches = ($$textref =~ m/<(?:table|tr|td)[^>]*?background\s*=\s*($attval)[^>]*>/igs);
|
---|
607 |
|
---|
608 | foreach my $link (@img_matches, @usemap_matches, @link_matches, @embed_matches, @tabbg_matches) {
|
---|
609 |
|
---|
610 | # remove quotes from link at start and end if necessary
|
---|
611 | if ($link=~/^\"/) {
|
---|
612 | $link=~s/^\"//;
|
---|
613 | $link=~s/\"$//;
|
---|
614 | }
|
---|
615 |
|
---|
616 | $link =~ s/\#.*$//s; # remove any anchor names, e.g. foo.html#name becomes foo.html
|
---|
617 |
|
---|
618 | if ($link !~ m@^/@ && $link !~ m/^([A-Z]:?)\\/) {
|
---|
619 | # Turn relative file path into full path
|
---|
620 | my $dirname = &File::Basename::dirname($filename);
|
---|
621 | $link = &util::filename_cat($dirname, $link);
|
---|
622 | }
|
---|
623 | $link = $self->eval_dir_dots($link);
|
---|
624 |
|
---|
625 | $self->{'file_blocks'}->{$link} = 1;
|
---|
626 | }
|
---|
627 | }
|
---|
628 |
|
---|
629 |
|
---|
630 | # do plugin specific processing of doc_obj
|
---|
631 | sub process {
|
---|
632 | my $self = shift (@_);
|
---|
633 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
|
---|
634 | my $outhandle = $self->{'outhandle'};
|
---|
635 |
|
---|
636 | print STDERR "<Processing n='$file' p='HTMLPlug'>\n" if ($gli);
|
---|
637 |
|
---|
638 | print $outhandle "HTMLPlug: processing $file\n"
|
---|
639 | if $self->{'verbosity'} > 1;
|
---|
640 |
|
---|
641 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
|
---|
642 | # this makes life so much easier... perl can cope with unix-style '/'s.
|
---|
643 | $base_dir =~ s@(\\)+@/@g;
|
---|
644 | $file =~ s@(\\)+@/@g;
|
---|
645 | }
|
---|
646 |
|
---|
647 | # reset per-doc stuff...
|
---|
648 | $self->{'aux_files'} = {};
|
---|
649 | $self->{'dir_num'} = 0;
|
---|
650 | $self->{'file_num'} = 0;
|
---|
651 |
|
---|
652 | # process an HTML file where sections are divided by headings tags (H1, H2 ...)
|
---|
653 | # you can also include metadata in the format (X can be any number)
|
---|
654 | # <hX>Title<!--gsdl-metadata
|
---|
655 | # <Metadata name="name1">value1</Metadata>
|
---|
656 | # ...
|
---|
657 | # <Metadata name="nameN">valueN</Metadata>
|
---|
658 | #--></hX>
|
---|
659 | if ($self->{'sectionalise_using_h_tags'}) {
|
---|
660 | # description_tags should allways be activated because we convert headings to description tags
|
---|
661 | $self->{'description_tags'} = 1;
|
---|
662 |
|
---|
663 | my $arrSections = [];
|
---|
664 | $$textref =~ s/<h([0-9]+)[^>]*>(.*?)<\/h[0-9]+>/$self->process_heading($1, $2, $arrSections, $file)/isge;
|
---|
665 |
|
---|
666 | if (scalar(@$arrSections)) {
|
---|
667 | my $strMetadata = $self->update_section_data($arrSections, -1);
|
---|
668 | if (length($strMetadata)) {
|
---|
669 | $strMetadata = '<!--' . $strMetadata . "\n-->\n</body>";
|
---|
670 | $$textref =~ s/<\/body>/$strMetadata/ig;
|
---|
671 | }
|
---|
672 | }
|
---|
673 | }
|
---|
674 |
|
---|
675 | my $cursection = $doc_obj->get_top_section();
|
---|
676 |
|
---|
677 | $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection)
|
---|
678 | unless $self->{'no_metadata'} || $self->{'description_tags'};
|
---|
679 |
|
---|
680 | # Store URL for page as metadata - this can be used for an
|
---|
681 | # altavista style search interface. The URL won't be valid
|
---|
682 | # unless the file structure contains the domain name (i.e.
|
---|
683 | # like when w3mir is used to download a website).
|
---|
684 |
|
---|
685 | # URL metadata (even invalid ones) are used to support internal
|
---|
686 | # links, so even if 'file_is_url' is off, still need to store info
|
---|
687 |
|
---|
688 | my $web_url = "http://$file";
|
---|
689 | $doc_obj->add_metadata($cursection, "URL", $web_url);
|
---|
690 |
|
---|
691 | if ($self->{'file_is_url'}) {
|
---|
692 | $doc_obj->add_metadata($cursection, "weblink", "<a href=\"$web_url\">");
|
---|
693 | $doc_obj->add_metadata($cursection, "webicon", "_iconworld_");
|
---|
694 | $doc_obj->add_metadata($cursection, "/weblink", "</a>");
|
---|
695 | }
|
---|
696 |
|
---|
697 | if ($self->{'description_tags'}) {
|
---|
698 | # remove the html header - note that doing this here means any
|
---|
699 | # sections defined within the header will be lost (so all <Section>
|
---|
700 | # tags must appear within the body of the HTML)
|
---|
701 | my ($head_keep) = ($$textref =~ m/^(.*?)<body[^>]*>/is);
|
---|
702 |
|
---|
703 | $$textref =~ s/^.*?<body[^>]*>//is;
|
---|
704 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
|
---|
705 |
|
---|
706 | my $opencom = '(?:<!--|<!(?:—|—|--))';
|
---|
707 | my $closecom = '(?:-->|(?:—|—|--)>)';
|
---|
708 |
|
---|
709 | my $lt = '(?:<|<)';
|
---|
710 | my $gt = '(?:>|>)';
|
---|
711 | my $quot = '(?:"|"|”|“)';
|
---|
712 |
|
---|
713 | my $dont_strip = '';
|
---|
714 | if ($self->{'no_strip_metadata_html'}) {
|
---|
715 | ($dont_strip = $self->{'no_strip_metadata_html'}) =~ s{,}{|}g;
|
---|
716 | }
|
---|
717 |
|
---|
718 | my $found_something = 0; my $top = 1;
|
---|
719 | while ($$textref =~ s/^(.*?)$opencom(.*?)$closecom//s) {
|
---|
720 | my $text = $1;
|
---|
721 | my $comment = $2;
|
---|
722 | if (defined $text) {
|
---|
723 | # text before a comment - note that getting to here
|
---|
724 | # doesn't necessarily mean there are Section tags in
|
---|
725 | # the document
|
---|
726 | $self->process_section(\$text, $base_dir, $file, $doc_obj, $cursection);
|
---|
727 | }
|
---|
728 | while ($comment =~ s/$lt(.*?)$gt//s) {
|
---|
729 | my $tag = $1;
|
---|
730 | if ($tag eq "Section") {
|
---|
731 | $found_something = 1;
|
---|
732 | $cursection = $doc_obj->insert_section($doc_obj->get_end_child($cursection)) unless $top;
|
---|
733 | $top = 0;
|
---|
734 | } elsif ($tag eq "/Section") {
|
---|
735 | $found_something = 1;
|
---|
736 | $cursection = $doc_obj->get_parent_section ($cursection);
|
---|
737 | } elsif ($tag =~ /^Metadata name=$quot(.*?)$quot/s) {
|
---|
738 | my $metaname = $1;
|
---|
739 | my $accumulate = $tag =~ /mode=${quot}accumulate${quot}/ ? 1 : 0;
|
---|
740 | $comment =~ s/^(.*?)$lt\/Metadata$gt//s;
|
---|
741 | my $metavalue = $1;
|
---|
742 | $metavalue =~ s/^\s+//;
|
---|
743 | $metavalue =~ s/\s+$//;
|
---|
744 | # assume that no metadata value intentionally includes
|
---|
745 | # carriage returns or HTML tags (if they're there they
|
---|
746 | # were probably introduced when converting to HTML from
|
---|
747 | # some other format).
|
---|
748 | # actually some people want to have html tags in their
|
---|
749 | # metadata.
|
---|
750 | $metavalue =~ s/[\cJ\cM]/ /sg;
|
---|
751 | $metavalue =~ s/<[^>]+>//sg
|
---|
752 | unless $dont_strip && ($dont_strip eq 'all' || $metaname =~ /^($dont_strip)$/);
|
---|
753 | $metavalue =~ s/\s+/ /sg;
|
---|
754 | if ($accumulate) {
|
---|
755 | $doc_obj->add_utf8_metadata($cursection, $metaname, $metavalue);
|
---|
756 | } else {
|
---|
757 | $doc_obj->set_utf8_metadata_element($cursection, $metaname, $metavalue);
|
---|
758 | }
|
---|
759 | } elsif ($tag eq "Description" || $tag eq "/Description") {
|
---|
760 | # do nothing with containing Description tags
|
---|
761 | } else {
|
---|
762 | # simple HTML tag (probably created by the conversion
|
---|
763 | # to HTML from some other format) - we'll ignore it and
|
---|
764 | # hope for the best ;-)
|
---|
765 | }
|
---|
766 | }
|
---|
767 | }
|
---|
768 | if ($cursection ne "") {
|
---|
769 | print $outhandle "HTMLPlug: WARNING: $file contains unmatched <Section></Section> tags\n";
|
---|
770 | }
|
---|
771 |
|
---|
772 | $$textref =~ s/^.*?<body[^>]*>//is;
|
---|
773 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
|
---|
774 | if ($$textref =~ /\S/) {
|
---|
775 | if (!$found_something) {
|
---|
776 | if ($self->{'verbosity'} > 2) {
|
---|
777 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags so\n";
|
---|
778 | print $outhandle " will be processed as a single section document\n";
|
---|
779 | }
|
---|
780 |
|
---|
781 | # go ahead and process single-section document
|
---|
782 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
|
---|
783 |
|
---|
784 | # if document contains no Section tags we'll go ahead
|
---|
785 | # and extract metadata (this won't have been done
|
---|
786 | # above as the -description_tags option prevents it)
|
---|
787 | my $complete_text = $head_keep.$doc_obj->get_text($cursection);
|
---|
788 | $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
|
---|
789 | unless $self->{'no_metadata'};
|
---|
790 |
|
---|
791 | } else {
|
---|
792 | print $outhandle "HTMLPlug: WARNING: $file contains the following text outside\n";
|
---|
793 | print $outhandle " of the final closing </Section> tag. This text will\n";
|
---|
794 | print $outhandle " be ignored.";
|
---|
795 |
|
---|
796 | my ($text);
|
---|
797 | if (length($$textref) > 30) {
|
---|
798 | $text = substr($$textref, 0, 30) . "...";
|
---|
799 | } else {
|
---|
800 | $text = $$textref;
|
---|
801 | }
|
---|
802 | $text =~ s/\n/ /isg;
|
---|
803 | print $outhandle " ($text)\n";
|
---|
804 | }
|
---|
805 | } elsif (!$found_something) {
|
---|
806 |
|
---|
807 | if ($self->{'verbosity'} > 2) {
|
---|
808 | # may get to here if document contained no valid Section
|
---|
809 | # tags but did contain some comments. The text will have
|
---|
810 | # been processed already but we should print the warning
|
---|
811 | # as above and extract metadata
|
---|
812 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags and\n";
|
---|
813 | print $outhandle " is blank or empty. Metadata will be assigned if present.\n";
|
---|
814 | }
|
---|
815 |
|
---|
816 | my $complete_text = $head_keep.$doc_obj->get_text($cursection);
|
---|
817 | $self->extract_metadata (\$complete_text, $metadata, $doc_obj, $cursection)
|
---|
818 | unless $self->{'no_metadata'};
|
---|
819 | }
|
---|
820 |
|
---|
821 | } else {
|
---|
822 |
|
---|
823 | # remove header and footer
|
---|
824 | if (!$self->{'keep_head'} || $self->{'description_tags'}) {
|
---|
825 | $$textref =~ s/^.*?<body[^>]*>//is;
|
---|
826 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
|
---|
827 | }
|
---|
828 |
|
---|
829 | # single section document
|
---|
830 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
|
---|
831 | }
|
---|
832 | return 1;
|
---|
833 | }
|
---|
834 |
|
---|
835 |
|
---|
836 | sub process_heading
|
---|
837 | {
|
---|
838 | my ($self, $nHeadNo, $strHeadingText, $arrSections, $file) = @_;
|
---|
839 | $strHeadingText = '' if (!defined($strHeadingText));
|
---|
840 |
|
---|
841 | my $strMetadata = $self->update_section_data($arrSections, int($nHeadNo));
|
---|
842 |
|
---|
843 | my $strSecMetadata = '';
|
---|
844 | while ($strHeadingText =~ s/<!--gsdl-metadata(.*?)-->//is)
|
---|
845 | {
|
---|
846 | $strSecMetadata .= $1;
|
---|
847 | }
|
---|
848 |
|
---|
849 | $strHeadingText =~ s/^\s+//g;
|
---|
850 | $strHeadingText =~ s/\s+$//g;
|
---|
851 | $strSecMetadata =~ s/^\s+//g;
|
---|
852 | $strSecMetadata =~ s/\s+$//g;
|
---|
853 |
|
---|
854 | $strMetadata .= "\n<Section>\n\t<Description>\n\t\t<Metadata name=\"Title\">" . $strHeadingText . "</Metadata>\n";
|
---|
855 |
|
---|
856 | if (length($strSecMetadata)) {
|
---|
857 | $strMetadata .= "\t\t" . $strSecMetadata . "\n";
|
---|
858 | }
|
---|
859 |
|
---|
860 | $strMetadata .= "\t</Description>\n";
|
---|
861 |
|
---|
862 | return "<!--" . $strMetadata . "-->";
|
---|
863 | }
|
---|
864 |
|
---|
865 |
|
---|
866 | sub update_section_data
|
---|
867 | {
|
---|
868 | my ($self, $arrSections, $nCurTocNo) = @_;
|
---|
869 | my ($strBuffer, $nLast, $nSections) = ('', 0, scalar(@$arrSections));
|
---|
870 |
|
---|
871 | if ($nSections == 0) {
|
---|
872 | push @$arrSections, $nCurTocNo;
|
---|
873 | return $strBuffer;
|
---|
874 | }
|
---|
875 | $nLast = $arrSections->[$nSections - 1];
|
---|
876 | if ($nCurTocNo > $nLast) {
|
---|
877 | push @$arrSections, $nCurTocNo;
|
---|
878 | return $strBuffer;
|
---|
879 | }
|
---|
880 | for(my $i = $nSections - 1; $i >= 0; $i--) {
|
---|
881 | if ($nCurTocNo <= $arrSections->[$i]) {
|
---|
882 | $strBuffer .= "\n</Section>";
|
---|
883 | pop @$arrSections;
|
---|
884 | }
|
---|
885 | }
|
---|
886 | push @$arrSections, $nCurTocNo;
|
---|
887 | return $strBuffer;
|
---|
888 | }
|
---|
889 |
|
---|
890 |
|
---|
891 | # note that process_section may be called multiple times for a single
|
---|
892 | # section (relying on the fact that add_utf8_text appends the text to any
|
---|
893 | # that may exist already).
|
---|
894 | sub process_section {
|
---|
895 | my $self = shift (@_);
|
---|
896 | my ($textref, $base_dir, $file, $doc_obj, $cursection) = @_;
|
---|
897 | # trap links
|
---|
898 | if (!$self->{'nolinks'}) {
|
---|
899 |
|
---|
900 | # usemap="./#index" not handled correctly => change to "#index"
|
---|
901 | $$textref =~ s/(<img[^>]*?usemap\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
|
---|
902 | $self->replace_usemap_links($1, $2, $3)/isge;
|
---|
903 |
|
---|
904 | $$textref =~ s/(<(?:a|area|frame|link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
|
---|
905 | $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
---|
906 | }
|
---|
907 |
|
---|
908 | # trap images
|
---|
909 |
|
---|
910 | # allow spaces if inside quotes - jrm21
|
---|
911 | $$textref =~ s/(<(?:img|embed|table|tr|td)[^>]*?(?:src|background)\s*=\s*)([\"\'][^\"\']+[\"\']|[^\s>]+)([^>]*>)/
|
---|
912 | $self->replace_images ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
---|
913 |
|
---|
914 | # add text to document object
|
---|
915 | # turn \ into \\ so that the rest of greenstone doesn't think there
|
---|
916 | # is an escape code following. (Macro parsing loses them...)
|
---|
917 | $$textref =~ s/\\/\\\\/go;
|
---|
918 |
|
---|
919 | $doc_obj->add_utf8_text($cursection, $$textref);
|
---|
920 | }
|
---|
921 |
|
---|
922 | sub replace_images {
|
---|
923 | my $self = shift (@_);
|
---|
924 | my ($front, $link, $back, $base_dir,
|
---|
925 | $file, $doc_obj, $section) = @_;
|
---|
926 |
|
---|
927 | # remove quotes from link at start and end if necessary
|
---|
928 | if ($link=~/^[\"\']/) {
|
---|
929 | $link=~s/^[\"\']//;$link=~s/[\"\']$//;
|
---|
930 | $front.='"';
|
---|
931 | $back="\"$back";
|
---|
932 | }
|
---|
933 |
|
---|
934 | $link =~ s/\n/ /g;
|
---|
935 |
|
---|
936 | # Hack to overcome Windows wv 0.7.1 bug that causes embedded images to be broken
|
---|
937 | # If the Word file path has spaces in it, wv messes up and you end up with
|
---|
938 | # absolute paths for the images, and without the "file://" prefix
|
---|
939 | # So check for this special case and massage the data to be correct
|
---|
940 | if ($ENV{'GSDLOS'} =~ /^windows/i && $self->{'plugin_type'} eq "WordPlug" && $link =~ /^[A-Za-z]\:\\/) {
|
---|
941 | $link =~ s/^.*\\([^\\]+)$/$1/;
|
---|
942 | }
|
---|
943 |
|
---|
944 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
---|
945 |
|
---|
946 | my $img_file = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
|
---|
947 |
|
---|
948 | my $anchor_name = $img_file;
|
---|
949 | #$anchor_name =~ s/^.*\///;
|
---|
950 | #$anchor_name = "<a name=\"$anchor_name\" ></a>";
|
---|
951 |
|
---|
952 | my $image_link = $front . $img_file .$back;
|
---|
953 | my $anchor_link = "<a href=\"$img_file\" >".$image_link."</a>";
|
---|
954 |
|
---|
955 | return $anchor_link;
|
---|
956 | #return $front . $img_file . $back . $anchor_name;
|
---|
957 | }
|
---|
958 |
|
---|
959 | sub replace_href_links {
|
---|
960 | my $self = shift (@_);
|
---|
961 | my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
|
---|
962 |
|
---|
963 | # attempt to sort out targets - frames are not handled
|
---|
964 | # well in this plugin and some cases will screw things
|
---|
965 | # up - e.g. the _parent target (so we'll just remove
|
---|
966 | # them all ;-)
|
---|
967 | $front =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
---|
968 | $back =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
---|
969 | $front =~ s/target=\"?_parent\"?//is;
|
---|
970 | $back =~ s/target=\"?_parent\"?//is;
|
---|
971 |
|
---|
972 | return $front . $link . $back if $link =~ /^\#/s;
|
---|
973 | $link =~ s/\n/ /g;
|
---|
974 |
|
---|
975 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
---|
976 | # href may use '\'s where '/'s should be on Windows
|
---|
977 | $href =~ s/\\/\//g;
|
---|
978 |
|
---|
979 | my ($filename) = $href =~ /^(?:.*?):(?:\/\/)?(.*)/;
|
---|
980 |
|
---|
981 |
|
---|
982 | ##### leave all these links alone (they won't be picked up by intermediate
|
---|
983 | ##### pages). I think that's safest when dealing with frames, targets etc.
|
---|
984 | ##### (at least until I think of a better way to do it). Problems occur with
|
---|
985 | ##### mailto links from within small frames, the intermediate page is displayed
|
---|
986 | ##### within that frame and can't be seen. There is still potential for this to
|
---|
987 | ##### happen even with html pages - the solution seems to be to somehow tell
|
---|
988 | ##### the browser from the server side to display the page being sent (i.e.
|
---|
989 | ##### the intermediate page) in the top level window - I'm not sure if that's
|
---|
990 | ##### possible - the following line should probably be deleted if that can be done
|
---|
991 | return $front . $link . $back if $href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/is;
|
---|
992 |
|
---|
993 |
|
---|
994 | if (($rl == 0) || ($filename =~ /$self->{'process_exp'}/) ||
|
---|
995 | ($href =~ /\/$/) || ($href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/i)) {
|
---|
996 | &ghtml::urlsafe ($href);
|
---|
997 | return $front . "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part . $back;
|
---|
998 | } else {
|
---|
999 | # link is to some other type of file (eg image) so we'll
|
---|
1000 | # need to associate that file
|
---|
1001 | return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
|
---|
1002 | }
|
---|
1003 | }
|
---|
1004 |
|
---|
1005 | sub add_file {
|
---|
1006 | my $self = shift (@_);
|
---|
1007 | my ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) = @_;
|
---|
1008 | my ($newname);
|
---|
1009 |
|
---|
1010 | my $filename = $href;
|
---|
1011 | if ($base_dir eq "") {
|
---|
1012 | # remove http:/ thereby leaving one slash at the start
|
---|
1013 | $filename =~ s/^[^:]*:\///;
|
---|
1014 | }
|
---|
1015 | else {
|
---|
1016 | # remove http://
|
---|
1017 | $filename =~ s/^[^:]*:\/\///;
|
---|
1018 | }
|
---|
1019 |
|
---|
1020 | $filename = &util::filename_cat($base_dir, $filename);
|
---|
1021 |
|
---|
1022 | # Replace %20's in URL with a space if required. Note that the filename
|
---|
1023 | # may include the %20 in some situations
|
---|
1024 | if ($filename =~ /\%20/) {
|
---|
1025 | if (!-e $filename) {
|
---|
1026 | $filename =~ s/\%20/ /g;
|
---|
1027 | }
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 | my ($ext) = $filename =~ /(\.[^\.]*)$/;
|
---|
1031 |
|
---|
1032 | if ($rl == 0) {
|
---|
1033 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
---|
1034 | return "_httpextlink_&rl=0&el=prompt&href=" . $href . $hash_part;
|
---|
1035 | }
|
---|
1036 | else {
|
---|
1037 | return "_httpextlink_&rl=0&el=direct&href=" . $href . $hash_part;
|
---|
1038 | }
|
---|
1039 | }
|
---|
1040 |
|
---|
1041 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
---|
1042 | return "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part;
|
---|
1043 | }
|
---|
1044 | if ($self->{'rename_assoc_files'}) {
|
---|
1045 | if (defined $self->{'aux_files'}->{$href}) {
|
---|
1046 | $newname = $self->{'aux_files'}->{$href}->{'dir_num'} . "/" .
|
---|
1047 | $self->{'aux_files'}->{$href}->{'file_num'} . $ext;
|
---|
1048 | } else {
|
---|
1049 | $newname = $self->{'dir_num'} . "/" . $self->{'file_num'} . $ext;
|
---|
1050 | $self->{'aux_files'}->{$href} = {'dir_num' => $self->{'dir_num'}, 'file_num' => $self->{'file_num'}};
|
---|
1051 | $self->inc_filecount ();
|
---|
1052 | }
|
---|
1053 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
---|
1054 | return "_httpdocimg_/$newname";
|
---|
1055 | } else {
|
---|
1056 | ($newname) = $filename =~ /([^\/\\]*)$/;
|
---|
1057 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
---|
1058 | return "_httpdocimg_/$newname";
|
---|
1059 | }
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 |
|
---|
1063 | sub format_link {
|
---|
1064 | my $self = shift (@_);
|
---|
1065 | my ($link, $base_dir, $file) = @_;
|
---|
1066 |
|
---|
1067 | my ($before_hash, $hash_part) = $link =~ /^([^\#]*)(\#?.*)$/;
|
---|
1068 |
|
---|
1069 | $hash_part = "" if !defined $hash_part;
|
---|
1070 | if (!defined $before_hash || $before_hash !~ /[\w\.\/]/) {
|
---|
1071 | my $outhandle = $self->{'outhandle'};
|
---|
1072 | print $outhandle "HTMLPlug: ERROR - badly formatted tag ignored ($link)\n"
|
---|
1073 | if $self->{'verbosity'};
|
---|
1074 | return ($link, "", 0);
|
---|
1075 | }
|
---|
1076 |
|
---|
1077 | if ($before_hash =~ s@^((?:http|ftp|file)://)@@i) {
|
---|
1078 | my $type = $1;
|
---|
1079 |
|
---|
1080 | if ($link =~ /^(http|ftp):/i) {
|
---|
1081 | # Turn url (using /) into file name (possibly using \ on windows)
|
---|
1082 | my @http_dir_split = split('/', $before_hash);
|
---|
1083 | $before_hash = &util::filename_cat(@http_dir_split);
|
---|
1084 | }
|
---|
1085 |
|
---|
1086 | $before_hash = $self->eval_dir_dots($before_hash);
|
---|
1087 |
|
---|
1088 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
---|
1089 |
|
---|
1090 | my $rl = 0;
|
---|
1091 | $rl = 1 if (-e $linkfilename);
|
---|
1092 |
|
---|
1093 | # make sure there's a slash on the end if it's a directory
|
---|
1094 | if ($before_hash !~ /\/$/) {
|
---|
1095 | $before_hash .= "/" if (-d $linkfilename);
|
---|
1096 | }
|
---|
1097 |
|
---|
1098 | return ($type . $before_hash, $hash_part, $rl);
|
---|
1099 |
|
---|
1100 | } elsif ($link !~ /^(mailto|news|gopher|nntp|telnet|javascript):/i && $link !~ /^\//) {
|
---|
1101 | if ($before_hash =~ s@^/@@ || $before_hash =~ /\\/) {
|
---|
1102 |
|
---|
1103 | # the first directory will be the domain name if file_is_url
|
---|
1104 | # to generate archives, otherwise we'll assume all files are
|
---|
1105 | # from the same site and base_dir is the root
|
---|
1106 |
|
---|
1107 | if ($self->{'file_is_url'}) {
|
---|
1108 | my @dirs = split /[\/\\]/, $file;
|
---|
1109 | my $domname = shift (@dirs);
|
---|
1110 | $before_hash = &util::filename_cat($domname, $before_hash);
|
---|
1111 | $before_hash =~ s@\\@/@g; # for windows
|
---|
1112 | }
|
---|
1113 | else
|
---|
1114 | {
|
---|
1115 | # see if link shares directory with source document
|
---|
1116 | # => turn into relative link if this is so!
|
---|
1117 |
|
---|
1118 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
|
---|
1119 | # too difficult doing a pattern match with embedded '\'s...
|
---|
1120 | my $win_before_hash=$before_hash;
|
---|
1121 | $win_before_hash =~ s@(\\)+@/@g;
|
---|
1122 | # $base_dir is already similarly "converted" on windows.
|
---|
1123 | if ($win_before_hash =~ s@^$base_dir/@@o) {
|
---|
1124 | # if this is true, we removed a prefix
|
---|
1125 | $before_hash=$win_before_hash;
|
---|
1126 | }
|
---|
1127 | }
|
---|
1128 | else {
|
---|
1129 | # before_hash has lost leading slash by this point,
|
---|
1130 | # -> add back in prior to substitution with $base_dir
|
---|
1131 | $before_hash = "/$before_hash";
|
---|
1132 |
|
---|
1133 | $before_hash = &util::filename_cat("",$before_hash);
|
---|
1134 | $before_hash =~ s@^$base_dir/@@;
|
---|
1135 | }
|
---|
1136 | }
|
---|
1137 | } else {
|
---|
1138 | # Turn relative file path into full path
|
---|
1139 | my $dirname = &File::Basename::dirname($file);
|
---|
1140 | $before_hash = &util::filename_cat($dirname, $before_hash);
|
---|
1141 | $before_hash = $self->eval_dir_dots($before_hash);
|
---|
1142 | }
|
---|
1143 |
|
---|
1144 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
---|
1145 | # make sure there's a slash on the end if it's a directory
|
---|
1146 | if ($before_hash !~ /\/$/) {
|
---|
1147 | $before_hash .= "/" if (-d $linkfilename);
|
---|
1148 | }
|
---|
1149 | return ("http://" . $before_hash, $hash_part, 1);
|
---|
1150 | } else {
|
---|
1151 | # mailto, news, nntp, telnet, javascript or gopher link
|
---|
1152 | return ($before_hash, "", 0);
|
---|
1153 | }
|
---|
1154 | }
|
---|
1155 |
|
---|
1156 | sub extract_first_NNNN_characters {
|
---|
1157 | my $self = shift (@_);
|
---|
1158 | my ($textref, $doc_obj, $thissection) = @_;
|
---|
1159 |
|
---|
1160 | foreach my $size (split /,/, $self->{'first'}) {
|
---|
1161 | my $tmptext = $$textref;
|
---|
1162 | # skip to the body
|
---|
1163 | $tmptext =~ s/.*<body[^>]*>//i;
|
---|
1164 | # remove javascript
|
---|
1165 | $tmptext =~ s@<script.*?</script>@ @sig;
|
---|
1166 | $tmptext =~ s/<[^>]*>/ /g;
|
---|
1167 | $tmptext =~ s/ / /g;
|
---|
1168 | $tmptext =~ s/^\s+//;
|
---|
1169 | $tmptext =~ s/\s+$//;
|
---|
1170 | $tmptext =~ s/\s+/ /gs;
|
---|
1171 | $tmptext = &unicode::substr ($tmptext, 0, $size);
|
---|
1172 | $tmptext =~ s/\s\S*$/…/; # adds an ellipse (...)
|
---|
1173 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
---|
1174 | }
|
---|
1175 | }
|
---|
1176 |
|
---|
1177 |
|
---|
1178 | sub extract_metadata {
|
---|
1179 | my $self = shift (@_);
|
---|
1180 | my ($textref, $metadata, $doc_obj, $section) = @_;
|
---|
1181 | my $outhandle = $self->{'outhandle'};
|
---|
1182 | # if we don't want metadata, we may as well not be here ...
|
---|
1183 | return if (!defined $self->{'metadata_fields'});
|
---|
1184 |
|
---|
1185 | # metadata fields to extract/save. 'key' is the (lowercase) name of the
|
---|
1186 | # html meta, 'value' is the metadata name for greenstone to use
|
---|
1187 | my %find_fields = ();
|
---|
1188 |
|
---|
1189 | my %creator_fields = (); # short-cut for lookups
|
---|
1190 |
|
---|
1191 |
|
---|
1192 | foreach my $field (split /,/, $self->{'metadata_fields'}) {
|
---|
1193 | $field =~ s/^\s+//; # remove leading whitespace
|
---|
1194 | $field =~ s/\s+$//; # remove trailing whitespace
|
---|
1195 |
|
---|
1196 | # support tag<tagname>
|
---|
1197 | if ($field =~ /^(.*?)<(.*?)>$/) {
|
---|
1198 | # "$2" is the user's preferred gs metadata name
|
---|
1199 | $find_fields{lc($1)}=$2; # lc = lowercase
|
---|
1200 | } else { # no <tagname> for mapping
|
---|
1201 | # "$field" is the user's preferred gs metadata name
|
---|
1202 | $find_fields{lc($field)}=$field; # lc = lowercase
|
---|
1203 | }
|
---|
1204 | }
|
---|
1205 |
|
---|
1206 | if (defined $self->{'hunt_creator_metadata'} &&
|
---|
1207 | $self->{'hunt_creator_metadata'} == 1 ) {
|
---|
1208 | my @extra_fields =
|
---|
1209 | (
|
---|
1210 | 'author',
|
---|
1211 | 'author.email',
|
---|
1212 | 'creator',
|
---|
1213 | 'dc.creator',
|
---|
1214 | 'dc.creator.corporatename',
|
---|
1215 | );
|
---|
1216 |
|
---|
1217 | # add the creator_metadata fields to search for
|
---|
1218 | foreach my $field (@extra_fields) {
|
---|
1219 | $creator_fields{$field}=0; # add to lookup hash
|
---|
1220 | }
|
---|
1221 | }
|
---|
1222 |
|
---|
1223 |
|
---|
1224 | # find the header in the html file, which has the meta tags
|
---|
1225 | $$textref =~ m@<head>(.*?)</head>@si;
|
---|
1226 |
|
---|
1227 | my $html_header=$1;
|
---|
1228 |
|
---|
1229 | # go through every <meta... tag defined in the html and see if it is
|
---|
1230 | # one of the tags we want to match.
|
---|
1231 |
|
---|
1232 | # special case for title - we want to remember if its been found
|
---|
1233 | my $found_title = 0;
|
---|
1234 | # this assumes that ">" won't appear. (I don't think it's allowed to...)
|
---|
1235 | $html_header =~ /^/; # match the start of the string, for \G assertion
|
---|
1236 |
|
---|
1237 | while ($html_header =~ m/\G.*?<meta(.*?)>/sig) {
|
---|
1238 | my $metatag=$1;
|
---|
1239 | my ($tag, $value);
|
---|
1240 |
|
---|
1241 | # find the tag name
|
---|
1242 | $metatag =~ /(?:name|http-equiv)\s*=\s*([\"\'])?(.*?)\1/is;
|
---|
1243 | $tag=$2;
|
---|
1244 | # in case they're not using " or ', but they should...
|
---|
1245 | if (! $tag) {
|
---|
1246 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
---|
1247 | $tag=$1;
|
---|
1248 | }
|
---|
1249 |
|
---|
1250 | if (!defined $tag) {
|
---|
1251 | print $outhandle "HTMLPlug: can't find NAME in \"$metatag\"\n";
|
---|
1252 | next;
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | # don't need to assign this field if it was passed in from a previous
|
---|
1256 | # (recursive) plugin
|
---|
1257 | if (defined $metadata->{$tag}) {next}
|
---|
1258 |
|
---|
1259 | # find the tag content
|
---|
1260 | $metatag =~ /content\s*=\s*([\"\'])?(.*?)\1/is;
|
---|
1261 | $value=$2;
|
---|
1262 |
|
---|
1263 | if (! $value) {
|
---|
1264 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
---|
1265 | $value=$1;
|
---|
1266 | }
|
---|
1267 | if (!defined $value) {
|
---|
1268 | print $outhandle "HTMLPlug: can't find VALUE in \"$metatag\"\n";
|
---|
1269 | next;
|
---|
1270 | }
|
---|
1271 |
|
---|
1272 | # clean up and add
|
---|
1273 | $value =~ s/\s+/ /gs;
|
---|
1274 | chomp($value); # remove trailing \n, if any
|
---|
1275 | if (exists $creator_fields{lc($tag)}) {
|
---|
1276 | # map this value onto greenstone's "Creator" metadata
|
---|
1277 | $tag='Creator';
|
---|
1278 | } elsif (!exists $find_fields{lc($tag)}) {
|
---|
1279 | next; # don't want this tag
|
---|
1280 | } else {
|
---|
1281 | # get the user's preferred capitalisation
|
---|
1282 | $tag = $find_fields{lc($tag)};
|
---|
1283 | }
|
---|
1284 | if (lc($tag) eq "title") {
|
---|
1285 | $found_title = 1;
|
---|
1286 | }
|
---|
1287 | print $outhandle " extracted \"$tag\" metadata \"$value\"\n"
|
---|
1288 | if ($self->{'verbosity'} > 2);
|
---|
1289 | if ($tag =~ /date.*/i){
|
---|
1290 | $tag = lc($tag);
|
---|
1291 | }
|
---|
1292 | $doc_obj->add_utf8_metadata($section, $tag, $value);
|
---|
1293 |
|
---|
1294 | }
|
---|
1295 |
|
---|
1296 | # TITLE: extract the document title
|
---|
1297 | if (exists $find_fields{'title'} && !$found_title) {
|
---|
1298 | # we want a title, and didn't find one in the meta tags
|
---|
1299 | # see if there's a <title> tag
|
---|
1300 | my $title;
|
---|
1301 | my $from = ""; # for debugging output only
|
---|
1302 | if ($html_header =~ /<title[^>]*>([^<]+)<\/title[^>]*>/is) {
|
---|
1303 | $title = $1;
|
---|
1304 | $from = "<title> tags";
|
---|
1305 | }
|
---|
1306 |
|
---|
1307 | if (!defined $title) {
|
---|
1308 | $from = "first 100 chars";
|
---|
1309 | # if no title use first 100 or so characters
|
---|
1310 | $title = $$textref;
|
---|
1311 | $title =~ s/^\xFE\xFF//; # Remove unicode byte order mark
|
---|
1312 | $title =~ s/^.*?<body>//si;
|
---|
1313 | # ignore javascript!
|
---|
1314 | $title =~ s@<script.*?</script>@ @sig;
|
---|
1315 | $title =~ s/<\/([^>]+)><\1>//g; # (eg) </b><b> - no space
|
---|
1316 | $title =~ s/<[^>]*>/ /g; # remove all HTML tags
|
---|
1317 | $title = substr ($title, 0, 100);
|
---|
1318 | $title =~ s/\s\S*$/.../;
|
---|
1319 | }
|
---|
1320 | $title =~ s/<[^>]*>/ /g; # remove html tags
|
---|
1321 | $title =~ s/ / /g;
|
---|
1322 | $title =~ s/(?: |\xc2\xa0)/ /g; # utf-8 for nbsp...
|
---|
1323 | $title =~ s/\s+/ /gs; # collapse multiple spaces
|
---|
1324 | $title =~ s/^\s*//; # remove leading spaces
|
---|
1325 | $title =~ s/\s*$//; # remove trailing spaces
|
---|
1326 |
|
---|
1327 | $title =~ s/^$self->{'title_sub'}// if ($self->{'title_sub'});
|
---|
1328 | $title =~ s/^\s+//s; # in case title_sub introduced any...
|
---|
1329 | $doc_obj->add_utf8_metadata ($section, 'Title', $title);
|
---|
1330 | print $outhandle " extracted Title metadata \"$title\" from $from\n"
|
---|
1331 | if ($self->{'verbosity'} > 2);
|
---|
1332 | }
|
---|
1333 |
|
---|
1334 | # add FileFormat metadata
|
---|
1335 | $doc_obj->add_metadata($section,"FileFormat", "HTML");
|
---|
1336 |
|
---|
1337 | # Special, for metadata names such as tagH1 - extracts
|
---|
1338 | # the text between the first <H1> and </H1> tags into "H1" metadata.
|
---|
1339 |
|
---|
1340 | foreach my $field (keys %find_fields) {
|
---|
1341 | if ($field !~ /^tag([a-z0-9]+)$/i) {next}
|
---|
1342 | my $tag = $1;
|
---|
1343 | if ($$textref =~ m@<$tag[^>]*>(.*?)</$tag[^>]*>@g) {
|
---|
1344 | my $content = $1;
|
---|
1345 | $content =~ s/ / /g;
|
---|
1346 | $content =~ s/<[^>]*>/ /g;
|
---|
1347 | $content =~ s/^\s+//;
|
---|
1348 | $content =~ s/\s+$//;
|
---|
1349 | $content =~ s/\s+/ /gs;
|
---|
1350 | if ($content) {
|
---|
1351 | $tag=$find_fields{"tag$tag"}; # get the user's capitalisation
|
---|
1352 | $tag =~ s/^tag//i;
|
---|
1353 | $doc_obj->add_utf8_metadata ($section, $tag, $content);
|
---|
1354 | print $outhandle " extracted \"$tag\" metadata \"$content\"\n"
|
---|
1355 | if ($self->{'verbosity'} > 2);
|
---|
1356 | }
|
---|
1357 | }
|
---|
1358 | }
|
---|
1359 | }
|
---|
1360 |
|
---|
1361 |
|
---|
1362 | # evaluate any "../" to next directory up
|
---|
1363 | # evaluate any "./" as here
|
---|
1364 | sub eval_dir_dots {
|
---|
1365 | my $self = shift (@_);
|
---|
1366 | my ($filename) = @_;
|
---|
1367 | my $dirsep_os = &util::get_os_dirsep();
|
---|
1368 | my @dirsep = split(/$dirsep_os/,$filename);
|
---|
1369 |
|
---|
1370 | my @eval_dirs = ();
|
---|
1371 | foreach my $d (@dirsep) {
|
---|
1372 | if ($d eq "..") {
|
---|
1373 | pop(@eval_dirs);
|
---|
1374 |
|
---|
1375 | } elsif ($d eq ".") {
|
---|
1376 | # do nothing!
|
---|
1377 |
|
---|
1378 | } else {
|
---|
1379 | push(@eval_dirs,$d);
|
---|
1380 | }
|
---|
1381 | }
|
---|
1382 |
|
---|
1383 | # Need to fiddle with number of elements in @eval_dirs if the
|
---|
1384 | # first one is the empty string. This is because of a
|
---|
1385 | # modification to util::filename_cat that supresses the addition
|
---|
1386 | # of a leading '/' character (or \ if windows) (intended to help
|
---|
1387 | # filename cat with relative paths) if the first entry in the
|
---|
1388 | # array is the empty string. Making the array start with *two*
|
---|
1389 | # empty strings is a way to defeat this "smart" option.
|
---|
1390 | #
|
---|
1391 | if (scalar(@eval_dirs) > 0) {
|
---|
1392 | if ($eval_dirs[0] eq ""){
|
---|
1393 | unshift(@eval_dirs,"");
|
---|
1394 | }
|
---|
1395 | }
|
---|
1396 | return &util::filename_cat(@eval_dirs);
|
---|
1397 | }
|
---|
1398 |
|
---|
1399 | sub replace_usemap_links {
|
---|
1400 | my $self = shift (@_);
|
---|
1401 | my ($front, $link, $back) = @_;
|
---|
1402 |
|
---|
1403 | $link =~ s/^\.\///;
|
---|
1404 | return $front . $link . $back;
|
---|
1405 | }
|
---|
1406 |
|
---|
1407 | sub inc_filecount {
|
---|
1408 | my $self = shift (@_);
|
---|
1409 |
|
---|
1410 | if ($self->{'file_num'} == 1000) {
|
---|
1411 | $self->{'dir_num'} ++;
|
---|
1412 | $self->{'file_num'} = 0;
|
---|
1413 | } else {
|
---|
1414 | $self->{'file_num'} ++;
|
---|
1415 | }
|
---|
1416 | }
|
---|
1417 |
|
---|
1418 |
|
---|
1419 | # Extend the BasPlug read_file so that strings like é are
|
---|
1420 | # converted to UTF8 internally.
|
---|
1421 | #
|
---|
1422 | # We don't convert < or > or & or " in case
|
---|
1423 | # they interfere with the GML files
|
---|
1424 |
|
---|
1425 | sub read_file {
|
---|
1426 | my ($self, $filename, $encoding, $language, $textref) = @_;
|
---|
1427 |
|
---|
1428 | &BasPlug::read_file($self, $filename, $encoding, $language, $textref);
|
---|
1429 |
|
---|
1430 | # Convert entities to their UTF8 equivalents
|
---|
1431 | $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
|
---|
1432 | $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1)/gseo;
|
---|
1433 | $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
|
---|
1434 | }
|
---|
1435 |
|
---|
1436 | 1;
|
---|