| 1 | ###########################################################################
|
|---|
| 2 | #
|
|---|
| 3 | # ghtml.pm -- this used to be called html.pm but it clashed
|
|---|
| 4 | # with the existing html module under windows
|
|---|
| 5 | #
|
|---|
| 6 | # A component of the Greenstone digital library software
|
|---|
| 7 | # from the New Zealand Digital Library Project at the
|
|---|
| 8 | # University of Waikato, New Zealand.
|
|---|
| 9 | #
|
|---|
| 10 | # Copyright (C) 1999 New Zealand Digital Library Project
|
|---|
| 11 | #
|
|---|
| 12 | # This program is free software; you can redistribute it and/or modify
|
|---|
| 13 | # it under the terms of the GNU General Public License as published by
|
|---|
| 14 | # the Free Software Foundation; either version 2 of the License, or
|
|---|
| 15 | # (at your option) any later version.
|
|---|
| 16 | #
|
|---|
| 17 | # This program is distributed in the hope that it will be useful,
|
|---|
| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 20 | # GNU General Public License for more details.
|
|---|
| 21 | #
|
|---|
| 22 | # You should have received a copy of the GNU General Public License
|
|---|
| 23 | # along with this program; if not, write to the Free Software
|
|---|
| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|---|
| 25 | #
|
|---|
| 26 | ###########################################################################
|
|---|
| 27 |
|
|---|
| 28 | package ghtml;
|
|---|
| 29 |
|
|---|
| 30 | # htmlsafe(TEXT)
|
|---|
| 31 | #
|
|---|
| 32 | # Converts SGML meta characters in TEXT to entity references.
|
|---|
| 33 | #
|
|---|
| 34 | sub htmlsafe
|
|---|
| 35 | {
|
|---|
| 36 | $_[0] =~ s/&/&/osg;
|
|---|
| 37 | $_[0] =~ s/</</osg;
|
|---|
| 38 | $_[0] =~ s/>/>/osg;
|
|---|
| 39 | $_[0] =~ s/\"/"/osg;
|
|---|
| 40 | }
|
|---|
| 41 |
|
|---|
| 42 | # urlsafe(TEXT)
|
|---|
| 43 | #
|
|---|
| 44 | # Converts characters not allowed in a URL to their hex representation.
|
|---|
| 45 | #
|
|---|
| 46 | sub urlsafe
|
|---|
| 47 | {
|
|---|
| 48 | $_[0] =~ s/[\x09\x20\x22\x3c\x3e\x5b\x5c\x5d\x5e\x60\x7b\x7c\x7d\x7e\?\=\&\+_\/]/sprintf("%%%2x", ord($&))/gse;
|
|---|
| 49 | }
|
|---|
| 50 |
|
|---|
| 51 | # dmsafe
|
|---|
| 52 | #
|
|---|
| 53 | # Converts characters which could make display.pl or html crack to their entity references.
|
|---|
| 54 | # Don't use this on dm macros as they will no longer be recognisable by dm (which
|
|---|
| 55 | # by the way, is the whole idea).
|
|---|
| 56 | # -- Rodger 12/1/98
|
|---|
| 57 | sub dmsafe {
|
|---|
| 58 | my ($s) = $_[0];
|
|---|
| 59 | $s =~ s/&/&/osg; # for html
|
|---|
| 60 | $s =~ s/</</osg; # for html
|
|---|
| 61 | $s =~ s/>/>/osg; # for html
|
|---|
| 62 | $s =~ s/\_/_/osg; # for dm (we have a convention of starting macros with _
|
|---|
| 63 | $s =~ s/\"/"/osg; # for html (don't want to be interpreted as a quote)
|
|---|
| 64 | $s =~ s/\{/{/osg; # for dm blocks
|
|---|
| 65 | $s =~ s/\}/}/osg; # for dm blocks
|
|---|
| 66 | $s =~ s/\\/\/osg; # for dm (dm removes naturally occurring backquotes)
|
|---|
| 67 | return $s;
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 |
|
|---|
| 71 | # named entry to the standard html font
|
|---|
| 72 | %charnetosf = ("Agrave"=> "192", "Aacute"=> "193", "Acirc" => "194", "Atilde"=> "195",
|
|---|
| 73 | "Auml" => "196", "Aring" => "197", "AElig" => "198", "Ccedil"=> "199",
|
|---|
| 74 | "Egrave"=> "200", "Eacute"=> "201", "Ecirc" => "202", "Euml" => "203",
|
|---|
| 75 | "Igrave"=> "204", "Iacute"=> "205", "Icirc" => "206", "Iuml" => "207",
|
|---|
| 76 | "ETH" => "208", "Ntilde"=> "209", "Ograve"=> "210", "Oacute"=> "211",
|
|---|
| 77 | "Ocirc" => "212", "Otilde"=> "213", "Ouml" => "214",
|
|---|
| 78 | "Oslash"=> "216", "Ugrave"=> "217", "Uacute"=> "218", "Ucirc" => "219",
|
|---|
| 79 | "Uuml" => "220", "Yacute"=> "221", "THORN" => "222", "szlig" => "223",
|
|---|
| 80 | "agrave"=> "224", "aacute"=> "225", "acirc" => "226", "atilde"=> "227",
|
|---|
| 81 | "auml" => "228", "aring" => "229", "aelig" => "230", "ccedil"=> "231",
|
|---|
| 82 | "egrave"=> "232", "eacute"=> "233", "ecirc" => "234", "euml" => "235",
|
|---|
| 83 | "igrave"=> "236", "iacute"=> "237", "icirc" => "238", "iuml" => "239",
|
|---|
| 84 | "eth" => "240", "ntidle"=> "241", "ograve"=> "242", "oacute"=> "243",
|
|---|
| 85 | "ocirc" => "244", "otilde"=> "245", "ouml" => "246",
|
|---|
| 86 | "oslash"=> "248", "ugrave"=> "249", "uacute"=> "250", "ucirc" => "251",
|
|---|
| 87 | "uuml" => "252", "yacute"=> "253", "thorn" => "254", "yuml" => "255");
|
|---|
| 88 |
|
|---|
| 89 | %symnetosf = ("quot" => "34", "amp" => "38", "lt" => "60", "gt" => "62",
|
|---|
| 90 | "nbsp" => "160", "iexcl" => "161", "cent" => "162", "pound" => "163",
|
|---|
| 91 | "curren"=> "164", "yen" => "165", "brvbar"=> "166", "sect" => "167",
|
|---|
| 92 | "uml" => "168", "copy" => "169", "ordf" => "170", "laquo" => "171",
|
|---|
| 93 | "not" => "172", "shy" => "173", "reg" => "174", "macr" => "175",
|
|---|
| 94 | "deg" => "176", "plusmn"=> "177", "sup2" => "178", "sup3" => "179",
|
|---|
| 95 | "acute" => "180", "micro" => "181", "para" => "182", "middot"=> "183",
|
|---|
| 96 | "cedil" => "184", "sup1" => "185", "ordm" => "186", "raquo" => "187",
|
|---|
| 97 | "frac14"=> "188", "frac12"=> "189", "frac34"=> "190", "iquest"=> "191",
|
|---|
| 98 | "times" => "215", "divide"=> "247");
|
|---|
| 99 |
|
|---|
| 100 |
|
|---|
| 101 |
|
|---|
| 102 | # standard font to plain text
|
|---|
| 103 | %sftotxt = ("32" => " ", "33" => "!", "34" => "\"", "35" => "\#", "36" => "\$",
|
|---|
| 104 | "37" => "\%", "38" => "&", "39" => "'", "40" => "(", "41" => ")",
|
|---|
| 105 | "42" => "*", "43" => "+", "44" => ",", "45" => "-", "46" => ".",
|
|---|
| 106 | "47" => "/", "48" => "0", "49" => "1", "50" => "2", "51" => "3",
|
|---|
| 107 | "52" => "4", "53" => "5", "54" => "6", "55" => "7", "56" => "8",
|
|---|
| 108 | "57" => "9", "58" => ":", "59" => ";", "60" => "<", "61" => "=",
|
|---|
| 109 | "62" => ">", "63" => "?", "64" => "\@", "65" => "A", "66" => "B",
|
|---|
| 110 | "57" => "9", "58" => ":", "59" => ";", "61" => "=",
|
|---|
| 111 | "63" => "?", "64" => "\@", "65" => "A", "66" => "B",
|
|---|
| 112 | "67" => "C", "68" => "D", "69" => "E", "70" => "F", "71" => "G",
|
|---|
| 113 | "72" => "H", "73" => "I", "74" => "J", "75" => "K", "76" => "L",
|
|---|
| 114 | "77" => "M", "78" => "N", "79" => "O", "80" => "P", "81" => "Q",
|
|---|
| 115 | "82" => "R", "83" => "S", "84" => "T", "85" => "U", "86" => "V",
|
|---|
| 116 | "87" => "W", "88" => "X", "89" => "Y", "90" => "Z", "91" => "[",
|
|---|
| 117 | "92" => "\\", "93" => "]", "94" => "^", "95" => "_", "96" => "`",
|
|---|
| 118 | "97" => "a", "98" => "b", "99" => "c", "100" => "d", "101" => "e",
|
|---|
| 119 | "102" => "f", "103" => "g", "104" => "h", "105" => "i", "106" => "j",
|
|---|
| 120 | "107" => "k", "108" => "l", "109" => "m", "110" => "n", "111" => "o",
|
|---|
| 121 | "112" => "p", "113" => "q", "114" => "r", "115" => "s", "116" => "t",
|
|---|
| 122 | "117" => "u", "118" => "v", "119" => "w", "120" => "x", "121" => "y",
|
|---|
| 123 | "122" => "z", "123" => "{", "124" => "|", "125" => "}", "126" => "~",
|
|---|
| 124 | "130" => ",", "131" => "f", "132" => "\"", "133" => "...", "139" => "<",
|
|---|
| 125 | "140" => "OE", "145" => "'", "146" => "'", "147" => "\"", "148" => "\"",
|
|---|
| 126 | "149" => "o", "150" => "--", "151" => "-", "152" => "~", "153" => "TM",
|
|---|
| 127 | "155" => ">", "156" => "oe", "159" => "Y", "160" => " ", "178" => "2",
|
|---|
| 128 | "179" => "3", "185" => "1", "188" => "1/4", "189" => "1/2", "190" => "3/4",
|
|---|
| 129 | "192" => "A", "193" => "A", "194" => "A", "195" => "A", "196" => "A",
|
|---|
| 130 | "197" => "A", "198" => "AE", "199" => "C", "200" => "E", "201" => "E",
|
|---|
| 131 | "202" => "E", "203" => "E", "204" => "I", "205" => "I", "206" => "I",
|
|---|
| 132 | "207" => "I", "208" => "D", "209" => "N", "210" => "O", "211" => "O",
|
|---|
| 133 | "212" => "O", "213" => "O", "214" => "O", "215" => "*", "216" => "O",
|
|---|
| 134 | "217" => "U", "218" => "U", "219" => "U", "220" => "U", "221" => "Y",
|
|---|
| 135 | "223" => "ss", "224" => "a", "225" => "a", "226" => "a", "227" => "a",
|
|---|
| 136 | "228" => "a", "229" => "a", "230" => "ae", "231" => "c", "232" => "e",
|
|---|
| 137 | "233" => "e", "234" => "e", "235" => "e", "236" => "i", "237" => "i",
|
|---|
| 138 | "238" => "i", "239" => "i", "241" => "n", "242" => "o", "243" => "o",
|
|---|
| 139 | "244" => "o", "245" => "o", "246" => "o", "247" => "/", "248" => "o",
|
|---|
| 140 | "249" => "u", "250" => "u", "251" => "u", "252" => "u", "253" => "y",
|
|---|
| 141 | "255" => "y", "8218" => ",");
|
|---|
| 142 |
|
|---|
| 143 |
|
|---|
| 144 | # returns the character in the standard html font. It assumes that the
|
|---|
| 145 | # & and ; have been stripped off the string.
|
|---|
| 146 | sub getcharequiv {
|
|---|
| 147 | my ($entity, $convertsymbols) = @_;
|
|---|
| 148 |
|
|---|
| 149 | # replace ‚ with comma (",")
|
|---|
| 150 | $entity =~ s/8218/044/;
|
|---|
| 151 |
|
|---|
| 152 | # a numeric entity
|
|---|
| 153 | if ($entity =~ /^\#0*(\d+)/) {
|
|---|
| 154 | return pack("c", $1);
|
|---|
| 155 | }
|
|---|
| 156 |
|
|---|
| 157 | # a named character entity
|
|---|
| 158 | if (defined $charnetosf{$entity}) {
|
|---|
| 159 | return pack("c", $charnetosf{$entity});
|
|---|
| 160 | }
|
|---|
| 161 |
|
|---|
| 162 | # a named symbol entity
|
|---|
| 163 | if ($convertsymbols && defined $symnetosf{$entity}) {
|
|---|
| 164 | return pack("c", $symnetosf{$entity});
|
|---|
| 165 | }
|
|---|
| 166 |
|
|---|
| 167 | return "&$entity;"; # unknown character
|
|---|
| 168 | }
|
|---|
| 169 |
|
|---|
| 170 | # convert character entities from named equivalents to html font
|
|---|
| 171 | sub convertcharentities {
|
|---|
| 172 | # args: the text that you want to convert
|
|---|
| 173 |
|
|---|
| 174 | $_[0] =~ s/&([^;]+);/&getcharequiv($1,0)/gse;
|
|---|
| 175 | }
|
|---|
| 176 |
|
|---|
| 177 | # convert any entities from named equivalents to html font
|
|---|
| 178 | sub convertallentities {
|
|---|
| 179 | # args: the text that you want to convert
|
|---|
| 180 |
|
|---|
| 181 | $_[0] =~ s/&([^;]+);/&getcharequiv($1,1)/gse;
|
|---|
| 182 | }
|
|---|
| 183 |
|
|---|
| 184 | sub html2txt {
|
|---|
| 185 | # args: the text that you want converted to ascii,
|
|---|
| 186 | # and whether to strip out sgml tags
|
|---|
| 187 |
|
|---|
| 188 | # strip out sgml tags if needed
|
|---|
| 189 | $_[0] =~ s/<[^>]>//g if $_[1];
|
|---|
| 190 |
|
|---|
| 191 | # convert the char entities to the standard html font
|
|---|
| 192 | &convertcharentities($_[0]);
|
|---|
| 193 |
|
|---|
| 194 | # convert the html character set to a plain ascii character set
|
|---|
| 195 | my $pos = 0;
|
|---|
| 196 | while ($pos < length($_[0])) {
|
|---|
| 197 | my $charnum = ord(substr($_[0], $pos, 1));
|
|---|
| 198 | if ($charnum >= 32) { # only convert characters above #32
|
|---|
| 199 | my $replacechars = " ";
|
|---|
| 200 | $replacechars = $sftotxt{$charnum} if defined $sftotxt{$charnum};
|
|---|
| 201 | substr($_[0], $pos, 1) = $replacechars;
|
|---|
| 202 | $pos += length ($replacechars);
|
|---|
| 203 |
|
|---|
| 204 | } else {
|
|---|
| 205 | $pos ++;
|
|---|
| 206 | }
|
|---|
| 207 | }
|
|---|
| 208 | }
|
|---|
| 209 |
|
|---|
| 210 |
|
|---|
| 211 | sub guess_mime_type {
|
|---|
| 212 | my ($filename) = @_;
|
|---|
| 213 |
|
|---|
| 214 | my ($fileext) = $filename =~ /\.(\w+)$/;
|
|---|
| 215 | return "unknown" unless defined $fileext;
|
|---|
| 216 |
|
|---|
| 217 | my %mime_type = ("ai"=>"application/postscript", "aif"=>"audio/x-aiff",
|
|---|
| 218 | "aifc"=>"audio/x-aiff", "aiff"=>"audio/x-aiff",
|
|---|
| 219 | "au"=>"audio/basic", "avi"=>"video/x-msvideo",
|
|---|
| 220 | "bcpio"=>"application/x-bcpio", "bin"=>"application/octet-stream",
|
|---|
| 221 | "cdf"=>"application/x-netcdf", "class"=>"application/octet-stream",
|
|---|
| 222 | "cpio"=>"application/x-cpio", "cpt"=>"application/mac-compactpro",
|
|---|
| 223 | "csh"=>"application/x-csh", "dcr"=>"application/x-director",
|
|---|
| 224 | "dir"=>"application/x-director", "dms"=>"application/octet-stream",
|
|---|
| 225 | "doc"=>"application/msword", "dvi"=>"application/x-dvi",
|
|---|
| 226 | "dxr"=>"application/x-director", "eps"=>"application/postscript",
|
|---|
| 227 | "etx"=>"text/x-setext",
|
|---|
| 228 | "exe"=>"application/octet-stream", "gif"=>"image/gif",
|
|---|
| 229 | "gtar"=>"application/x-gtar", "hdf"=>"application/x-hdf",
|
|---|
| 230 | "hqx"=>"application/mac-binhex40", "htm"=>"text/html",
|
|---|
| 231 | "html"=>"text/html", "ice"=>"x-conference/x-cooltalk",
|
|---|
| 232 | "ief"=>"image/ief", "jpe"=>"image/jpeg",
|
|---|
| 233 | "jpeg"=>"image/jpeg", "jpg"=>"image/jpeg",
|
|---|
| 234 | "kar"=>"audio/midi", "latex"=>"application/x-latex",
|
|---|
| 235 | "lha"=>"application/octet-stream", "lzh"=>"application/octet-stream",
|
|---|
| 236 | "man"=>"application/x-troff-man", "mcf"=>"image/vasa",
|
|---|
| 237 | "me"=>"application/x-troff-me", "mid"=>"audio/midi",
|
|---|
| 238 | "midi"=>"audio/midi", "mif"=>"application/x-mif",
|
|---|
| 239 | "mov"=>"video/quicktime", "movie"=>"video/x-sgi-movie",
|
|---|
| 240 | "mp2"=>"audio/mpeg", "mpe"=>"video/mpeg",
|
|---|
| 241 | "mpeg"=>"video/mpeg", "mpg"=>"video/mpeg",
|
|---|
| 242 | "mpga"=>"audio/mpeg", "ms"=>"application/x-troff-ms",
|
|---|
| 243 | "nc"=>"application/x-netcdf", "oda"=>"application/oda",
|
|---|
| 244 | "pbm"=>"image/x-portable-bitmap", "pdb"=>"chemical/x-pdb",
|
|---|
| 245 | "pdf"=>"application/pdf", "pgm"=>"image/x-portable-graymap",
|
|---|
| 246 | "png"=>"image/png", "pnm"=>"image/x-portable-anymap",
|
|---|
| 247 | "ppm"=>"image/x-portable-pixmap", "ppt"=>"application/powerpoint",
|
|---|
| 248 | "ps"=>"application/postscript", "qt"=>"video/quicktime",
|
|---|
| 249 | "ra"=>"audio/x-realaudio", "ram"=>"audio/x-pn-realaudio",
|
|---|
| 250 | "ras"=>"image/x-cmu-raster", "rgb"=>"image/x-rgb",
|
|---|
| 251 | "roff"=>"application/x-troff", "rpm"=>"audio/x-pn-realaudio-plugin",
|
|---|
| 252 | "rtf"=>"application/rtf", "rtx"=>"text/richtext",
|
|---|
| 253 | "sgm"=>"text/x-sgml", "sgml"=>"text/x-sgml",
|
|---|
| 254 | "sh"=>"application/x-sh", "shar"=>"application/x-shar",
|
|---|
| 255 | "sit"=>"application/x-stuffit", "skd"=>"application/x-koan",
|
|---|
| 256 | "skm"=>"application/x-koan", "skp"=>"application/x-koan",
|
|---|
| 257 | "skt"=>"application/x-koan", "snd"=>"audio/basic",
|
|---|
| 258 | "src"=>"application/x-wais-source", "sv4cpio"=>"application/x-sv4cpio",
|
|---|
| 259 | "sv4crc"=>"application/x-sv4crc", "t"=>"application/x-troff",
|
|---|
| 260 | "tar"=>"application/x-tar", "tcl"=>"application/x-tcl",
|
|---|
| 261 | "tex"=>"application/x-tex", "texi"=>"application/x-texinfo",
|
|---|
| 262 | "texinfo"=>"application/x-texinfo", "tif"=>"image/tiff",
|
|---|
| 263 | "tiff"=>"image/tiff", "tr"=>"application/x-troff",
|
|---|
| 264 | "tsv"=>"text/tab-separated-values", "txt"=>"text/plain",
|
|---|
| 265 | "ustar"=>"application/x-ustar", "vcd"=>"application/x-cdlink",
|
|---|
| 266 | "vrml"=>"x-world/x-vrml", "wav"=>"audio/x-wav",
|
|---|
| 267 | "wrl"=>"x-world/x-vrml", "xbm"=>"image/x-xbitmap",
|
|---|
| 268 | "xpm"=>"image/x-xpixmap", "xwd"=>"image/x-xwindowdump",
|
|---|
| 269 | "xyz"=>"chemical/x-pdb", "zip"=>"application/zip");
|
|---|
| 270 |
|
|---|
| 271 | return $mime_type{$fileext} if (defined $mime_type{$fileext});
|
|---|
| 272 |
|
|---|
| 273 | return "unknown";
|
|---|
| 274 | }
|
|---|
| 275 |
|
|---|
| 276 |
|
|---|
| 277 | 1;
|
|---|
