Web.pm

   1 # $Id$
   2 # Common functions for HTML/XHTML output generation
   3 # Copyright (C) 2003 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; exactly version 2 of June 1991 is required
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18
  19 package My::Web;
  20 require 5.6.0;  # at least 'use warnings;' but we need some 5.6.0+ modules anyway
  21 our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
  22 our $CVS_ID=q$Id$;
  23 use strict;
  24 use warnings;
  25
  26 use Exporter;
  27 sub Wrequire ($);
  28 sub Wuse ($@);
  29 our $W;
  30 our @EXPORT=qw(&Wrequire &Wuse &a_href &a_href_cz &vskip &img &centerimg &rightimg $W &top_dir &top_dir_disk &Wprint);
  31 our @ISA=qw(Exporter);
  32
  33 BEGIN
  34 {
  35         sub Wrequire ($)
  36         {
  37         my($file)=@_;
  38
  39 #               print STDERR "Wrequire $file\n";
  40                 $file=~s#/#::#g;
  41                 $file=~s/[.]pm$//;
  42                 my $class=$file;
  43                 $file=~s#::#/#g;
  44                 $file.=".pm";
  45                 my $aref=($W->{"packages_used"}{$Apache::Registry::curstash}||=[]);
  46                 push @$aref,$class
  47                                 if !{ map(($_=>1),@$aref) }->{$class};  # Prevent duplicated entries.
  48                 CORE::require $file;
  49                 1;      # Otherwise 'require' would already file above.
  50         }
  51
  52         sub Wuse ($@)
  53         {
  54         my($file,@list)=@_;
  55
  56 #               print STDERR "Wuse $file\n";
  57                 Wrequire $file;
  58                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  59                 $file->import(@list);
  60                 1;
  61         }
  62 }
  63
  64 BEGIN { Wuse 'WebConfig'; }     # for %WebConfig
  65 require CGI;    # for &escapeHTML
  66 require Image::Size;    # for &imgsize
  67 use File::Basename;     # &basename
  68 use Carp qw(cluck confess);
  69 use URI::Escape;
  70 require HTTP::BrowserDetect;
  71 require HTTP::Negotiate;
  72 my $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
  73 require CGI;
  74 use ModPerl::Util qw(exit);
  75
  76
  77 #our $W;
  78                 # $W->{"title"}
  79                 # $W->{"head"}
  80                 # $W->{"head_css"}
  81                 # $W->{"force_charset"}
  82                 # %{$W->{"packages_used"}
  83                 # $W->{"heading_done"}
  84                 # $W->{"footer_passed"}
  85                 # %{$W->{"headers"}}
  86                 # %{$W->{"headers_lc"}} # maps lc($headers_key)=>$headers_key
  87                 # @{$W->{"packages_used"}{$Apache::Registry::curstash}}}
  88                 # %{$W->{"args"}}
  89
  90 sub init ($%)
  91 {
  92 my($class,%args)=@_;
  93
  94         print STDERR "$class->init ".Apache->request()->unparsed_uri()."\n";
  95 cluck;
  96
  97         my $packages_used_save=$W->{"packages_used"};
  98         $W={ %WebConfig,%args };        # override %WebConfig settings
  99         $W->{"packages_used"}=$packages_used_save;
 100
 101         $W->{"__PACKAGE__"}||="Apache::ROOT".$Apache::Registry::curstash;
 102
 103         $W->{"top_dir"}||=eval '$'.$W->{"__PACKAGE__"}.'::top_dir';
 104
 105         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_ent");
 106         do { $W->{$_}=0  if !defined $W->{$_}; } for ("detect_js");
 107         do { $W->{$_}=1  if !defined $W->{$_}; } for ("have_css");      # AFAIK it does not hurt anyone.
 108         do { $W->{$_}=1  if !defined $W->{$_}; } for ("heading");
 109         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer");
 110         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_delimit");
 111         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_mailme");
 112         do { $W->{$_}=1  if !defined $W->{$_}; } for ("footer_ids");
 113         do { $W->{$_}=1  if !defined $W->{$_}; } for ("indexme");
 114         do { $W->{$_}="" if !defined $W->{$_}; } for ("head");
 115         do { $W->{$_}="" if !defined $W->{$_}; } for ("head_css");
 116
 117         my $footer_any=0;
 118         for (qw(footer_mailme footer_ids)) {
 119                 $W->{$_}=0 if !$W->{"footer"};
 120                 $footer_any=1 if $W->{$_};
 121                 }
 122         $W->{"footer"}=0 if !$footer_any;
 123         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 124
 125         $W->{"r"}=Apache->request();
 126
 127         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 128            if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 129                 { $W->{"have_ent"}=0; }
 130         elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 131                 { $W->{"have_ent"}=1; }
 132         else
 133                 { delete $W->{"have_ent"}; }
 134         if ($W->{"detect_ent"} && !defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 135                 $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 136                                 .CGI::escapeHTML("http://".&{$W->{"web_hostname_sub"}}()."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 137                                                 ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 138                                 .'" />'."\n";
 139                 }
 140         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 141         $W->{"r"}->args($W->{"QUERY_STRING"});
 142         # Do not: $W->{"r"}->args()
 143         # as it parses only QUERY_STRING (not POST data).
 144         $W->{"args"}={ CGI->new()->Vars() };
 145         for (keys(%{$W->{"args"}})) {
 146                 my @vals=split /\x00/,$W->{"args"}{$_};
 147                 next if @vals<=1;
 148                 $W->{"args"}{$_}=[@vals];
 149                 }
 150
 151         do { $W->{$_}=$W->{"r"}->headers_in()->{"Accept"}     if !defined $W->{$_}; } for ("accept");
 152         do { $W->{$_}=$W->{"r"}->headers_in()->{"User-Agent"} if !defined $W->{$_}; } for ("user_agent");
 153
 154         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"user_agent"});
 155
 156         if (!defined $W->{"have_style"}) {
 157                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
 158                 }
 159
 160         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 161         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 162                 $W->{"head"}.='<script type="text/javascript" src="'.top_dir('/have_js.js.pl').'"></script>'."\n";
 163                 }
 164
 165         do { args_check(%$_) if $_; } for ($W->{"args_check"});
 166
 167         return $W;
 168 }
 169
 170 sub Wprint($)
 171 {
 172 my($text)=@_;
 173
 174         $W->{"r"}->print($text);
 175 }
 176
 177 sub top_dir_disk ()
 178 {
 179         do { return $_ if $_; } for ($W->{"top_dir"});
 180         return $INC[0]; # fallback
 181 }
 182
 183 sub top_dir (;$)
 184 {
 185 my($in)=@_;
 186
 187         if (my $uri=$W->{"r"}->unparsed_uri()) {
 188                 if ($W->{"args"}{"Wabs"}) {
 189                         # FIXME: $in may not be defined here!
 190                         # to prevent: Use of uninitialized value in ...
 191                         if ($in=~m#^/#) {
 192                                 $in=~s#^/*##;
 193                                 }
 194                         else {
 195                                 $in=$uri."/".$in;
 196                                 $in=~tr#/#/#s;
 197                                 1 while $in=~s#/(?:[^/]+)/\Q..\E/#/#g
 198                                 }
 199                         return "http://".&{$W->{"web_hostname_sub"}}()."/".(defined $in ? $in : "");
 200                         }
 201                 $uri.="Index" if $uri=~m#/$#;
 202                 if (defined $in) {
 203                         my($inpath,$inquery)=split /[?]/,$in,2;
 204                         $inpath=~tr///cs;
 205                         $uri=~tr///cs;
 206                         for (;;) {
 207                                 my($in1 ,$in2 )=($in =~m#^(/[^/]+)(/.*)$#);
 208                                 my($uri1,$uri2)=($uri=~m#^(/[^/]+)(/.*)$#);
 209                                 last if !defined $in1 || !defined $uri1 || $in1 ne $uri1;
 210                                 $in=$in2;
 211                                 $uri=$uri2;
 212                                 }
 213                         }
 214                 $uri=~s#^/*##;
 215                 $uri=~s#[^/]+#..#g;
 216                 $uri=File::Basename::dirname($uri);
 217                 my $r=$uri.(defined $in ? $in : "");
 218 #               1 while $r=~s#^[.]/##;
 219 #               $r="./$r" if $r=~m#^(?:?.*)$#;  # empty pathname?
 220                 return $r;
 221                 }
 222         return top_dir_disk().$in;
 223 }
 224
 225 sub fatal (;$);
 226
 227 sub args_check (%)
 228 {
 229 my(%tmpl)=@_;
 230
 231         while (my($name,$regex)=each(%tmpl)) {
 232                 my $name_html="Parameter <span class=\"quote\">".CGI::escapeHTML($name)."</span>";
 233                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 234                 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
 235                 fatal "$name_html passed as multivar although singlevar expected"
 236                                 if ref $W->{"args"}{$name} && !ref $regex;
 237                 $regex=${$regex}[0] if ref $regex;
 238                 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
 239                         $val="" if !defined $val;
 240                         fatal "$name_html <span class=\"quote\">".CGI::escapeHTML($val)."</span>"
 241                                                         ." does not match the required regex <span class=\"quote\">".CGI::escapeHTML($regex)."</span> "
 242                                         if $regex ne "" && $val!~/$regex/;
 243                         }
 244                 }
 245 }
 246
 247 sub vskip (;$)
 248 {
 249 my($height)=@_;
 250
 251         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 252 }
 253
 254 sub fatal (;$)
 255 {
 256 my($msg)=@_;
 257
 258         $msg="UNKNOWN" if !$msg;
 259
 260         $W->{"indexme"}=0;      # For the case no heading was sent yet.
 261         My::Web->heading();
 262         Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 263                         ."<p>You can report this problem's details to"
 264                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 265         footer();
 266 }
 267
 268 sub footer (;$)
 269 {
 270         exit 1 if $W->{"footer_passed"}++;      # deadlock prevention:
 271
 272         Wprint vskip if $W->{"footer_delimit"};
 273
 274         if ($W->{"heading"}) {
 275                 do { &{$_}() if $_; } for ($W->{"footing_delimit"});
 276                 }
 277
 278         Wprint "<hr />\n" if $W->{"footer"};
 279
 280         if ($W->{"footer_mailme"}) {
 281                 Wprint '<form action="'.top_dir('/SendMsg.pl').'" method="post" onsubmit="'
 282                                 ."this.elements['msgscript'].value=this.elements['msghtml'].value;"
 283                                 ."this.elements['msghtml'].value='';"
 284                                 ."this.submit();"
 285                                 .'">'."\n";
 286                         Wprint '<p align="right">'."\n";
 287                                 Wprint '<input name="msgscript" type="hidden" />'."\n";
 288                                 Wprint '<input name="msghtml" type="text" size="32" alt="Message" />'."\n";
 289                                 Wprint '<input name="submit" type="submit" value="Quick Note" />'."\n";
 290                         Wprint '</p>'."\n";
 291                 Wprint '</form>'."\n";
 292                 }
 293
 294         if ($W->{"footer_ids"}) {
 295                 Wprint '<p class="cvs-id">';
 296                 Wprint join("<br />\n",map({ my $package=$_;
 297                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 298 #                                       || $package     # debug
 299                                         );
 300                         if (!$cvs_id) {
 301                                 ();
 302                                 }
 303                         else {
 304                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 305                                 my @cvs_id_split=split / +/,$cvs_id;
 306                                 if (@cvs_id_split==8) {
 307                                         my $file=$package;
 308                                         $file=~s#::#/#g;
 309                                         my $ext;
 310                                         my @tried;
 311                                         for (qw(.html.pl .pl .pm),"") {
 312                                                 $ext=$_;
 313                                                 my $pathname=top_dir_disk()."/$file$ext";
 314                                                 push @tried,$pathname;
 315                                                 last if -r $pathname;
 316                                                 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
 317                                                 }
 318                                         $file.=$ext;
 319                                         $cvs_id_split[2]=""
 320                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 321                                                                         $cvs_id_split[2]);
 322                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 323                                                         ($package!~/^Apache::/ ? $package : $cvs_id_split[1]));
 324                                         $cvs_id_split[5]=&{$W->{"cvs_id_author"}}($cvs_id_split[5]);
 325                                         }
 326                                 join " ",@cvs_id_split;
 327                                 }
 328                         } (
 329                                         $W->{"__PACKAGE__"},
 330                                         __PACKAGE__,
 331                                         @{$W->{"packages_used"}{$Apache::Registry::curstash}},
 332                                         )));
 333                 Wprint "</p>\n";
 334                 }
 335
 336         for my $package (
 337                         $W->{"__PACKAGE__"},
 338                         __PACKAGE__,
 339                         @{$W->{"packages_used"}{$Apache::Registry::curstash}},
 340                         ) {
 341                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 342 #                               || $package     # debug
 343                                 );
 344                 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 345                 }
 346
 347         if ($W->{"heading"}) {
 348                 do { &{$_}() if $_; } for ($W->{"footing"});
 349                 }
 350
 351         Wprint "</body></html>\n";
 352         exit(0);
 353 }
 354
 355 sub header (%)
 356 {
 357 my(%pairs)=@_;
 358
 359         while (my($key,$val)=each(%pairs)) {
 360                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 361                 for ($W->{"headers_lc"}{lc $key} || ()) {
 362                         delete $W->{"headers"}{$_};
 363                         }
 364                 $W->{"headers_lc"}{lc $key}=$key;
 365                 $W->{"headers"}{$key}=$val;
 366                 }
 367 }
 368
 369 sub size_display ($)
 370 {
 371 my($size)=@_;
 372
 373            if ($size<4096)
 374                 {}
 375         elsif ($size<1024*1024)
 376                 { $size=sprintf "%.1fK",$size/1024; }
 377         else
 378                 { $size=sprintf "%.1fM",$size/1024/1024; }
 379         $size.="B";
 380         return $size;
 381 }
 382
 383 sub url_is_local ($)
 384 {
 385 my($url)=@_;
 386
 387         return $url!~m#^[a-z]+://#;
 388 }
 389
 390 sub a_href ($;$%)
 391 {
 392 my($url,$contents,%args)=@_;
 393
 394         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 395         if (!defined $contents) {
 396                 $contents=$url;
 397                 $contents=File::Basename::basename($contents) if $args{"basename"};
 398                 $contents=CGI::escapeHTML($contents);
 399                 }
 400         $contents=~s#<a\b[^>]*>##gi;
 401         $contents=~s#</a>##gi;
 402
 403         $url=top_dir($url) if url_is_local $url && $url=~m#^/#;
 404
 405         my $r='<a href="';
 406         my $urlent=CGI::escapeHTML($url);
 407            if ($url eq $urlent)
 408                 { $r.=$url; }
 409         elsif (url_is_local $url)
 410                 { $r.=$urlent; }
 411         elsif (defined $W->{"have_ent"} && !$W->{"have_ent"})   # non-ent client
 412                 { $r.=$url; }
 413         elsif ($W->{"have_ent"})        # ent client
 414                 { $r.=$urlent; }
 415         else    # unknown client, &CGI::escapeHTML should not be needed here
 416                 { $r.=CGI::escapeHTML(top_dir('/Redirect.pl?location='.uri_escape($url))); }
 417         $r.='"';
 418         do { $r.=" $_" if $_; } for ($args{"attr"});
 419         $r.='>'.$contents.'</a>';
 420         if ($args{"size"} && url_is_local($url) && ($args{"size"}>=2 || $url=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) { # Downloadable?
 421                 $url=top_dir_disk().$url if $url=~m#^/#;
 422                 if (!-r $url)
 423                         { cluck "File not readable: $url"; }
 424                 else {
 425                         $r.='&nbsp;('.size_display((stat($url))[7]).')';
 426                         }
 427                 }
 428         return $r;
 429 }
 430
 431 sub remote_ip ()
 432 {
 433         # Do not: PerlModule                 Apache::ForwardedFor
 434         #         PerlPostReadRequestHandler Apache::ForwardedFor
 435         # As 'Apache::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 436         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 437         # We must take the last item ourselves.
 438         my $r=$W->{"r"}->headers_in()->{"X-Forwarded-For"} || $W->{"r"}->get_remote_host();
 439         $r=~s/^.*,\s*//;
 440         return $r;
 441 }
 442
 443 sub is_cz ()
 444 {
 445         return 0 if !$have_Geo_IP;
 446         return "CZ" eq Geo::IP->new()->country_code_by_addr(remote_ip());
 447 }
 448
 449 sub a_href_cz ($$;%)
 450 {
 451 my($url,$contents,%args)=@_;
 452
 453         return a_href $url,$contents,%args if is_cz();
 454         return $contents;
 455 }
 456
 457 sub make ($)
 458 {
 459 my($cmd)=@_;
 460
 461         system {'flock'} 'flock','-x',top_dir_disk(),$cmd.' >&2';
 462 }
 463
 464 sub img_size ($$)
 465 {
 466 my($width,$height)=@_;
 467
 468         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 469                         ." width=\"$width\" height=\"$height\"";
 470 }
 471
 472 sub negotiate_variant (%)
 473 {
 474 my(%args)=@_;
 475
 476         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 477         return [ map(($args{$_}),@fields) ];
 478 }
 479
 480 my @img_variants=(
 481                 { "id"=>"png","qs"=>1.0,"content-type"=>"image/png" },
 482                 { "id"=>"gif","qs"=>0.9,"content-type"=>"image/gif" },
 483                 );
 484 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 485
 486 sub img_src ($)
 487 {
 488 my($file_base)=@_;
 489
 490         if (!url_is_local($file_base)) {
 491                 return $file_base if !wantarray();
 492                 return ($file_base,$file_base);
 493                 }
 494         # Known image extension?
 495         if ($file_base=~m#$img_variants_re#o) {
 496                 return $file_base if !wantarray();
 497                 return ($file_base,$file_base) if $file_base!~m#^/#;
 498                 return (top_dir($file_base),top_dir_disk().$file_base);
 499                 }
 500
 501         my $file_base_disk;
 502         my $file_base_uri;
 503         if ($file_base!~m#^/#) {
 504                 $file_base_disk=$file_base_uri=$file_base;
 505                 }
 506         else {
 507                 $file_base_disk=top_dir_disk().$file_base;
 508                 $file_base_uri=top_dir($file_base);
 509                 }
 510
 511         my @nego_variants;
 512         for my $var (@img_variants) {
 513                 my $file=$file_base_disk.".".$var->{"id"};
 514                 # TODO: Somehow quickly check dependencies?
 515                 make('make -s --no-print-directory'
 516                                                 .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'")
 517                                 if !-f $file;
 518                 push @nego_variants,negotiate_variant(
 519                                 %$var,
 520                                 "size"=>(stat $file)[7],
 521                                 );
 522                 }
 523         # Do not: ,$W->{"r"});
 524         # but should we provide somehow either 'HTTP::Headers' or 'HTTP::Request' ?
 525         my $ext=HTTP::Negotiate::choose(\@nego_variants);
 526         $ext||=$img_variants[0]->{"id"};        # &HTTP::Negotiate::choose failed?
 527
 528         return $file_base_uri.".".$ext if !wantarray();
 529         return ($file_base_uri.".".$ext,$file_base_disk.".".$ext);
 530 }
 531
 532 sub img ($$;%)
 533 {
 534 my($file_base,$alt,%attr)=@_;
 535
 536         my($file_uri,$file_disk)=img_src $file_base;
 537         my($width,$height)=Image::Size::imgsize($file_disk);
 538         $alt=~s/<[^>]*>//g;
 539         $alt=CGI::escapeHTML($alt);
 540         my $content="<img src=\"$file_uri\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 541                         .(!$attr{"attr"} ? "" : " ".$attr{"attr"})." />";
 542         return a_href img_src($attr{"a_href_img"}),$content if $attr{"a_href_img"};
 543         return a_href $attr{"a_href"},$content if $attr{"a_href"};
 544         return $content;
 545 }
 546
 547 sub centerimg
 548 {
 549         my $r.="";
 550         $r.='<table border="0" width="100%"><tr>'."\n";
 551         @_=( [@_] ) if !ref $_[0];
 552         for (@_) {
 553                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 554                 }
 555         $r.='</tr></table>'."\n";
 556         return $r;
 557 }
 558
 559 sub rightimg
 560 {
 561 my($text,@args_img)=@_;
 562
 563         # Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
 564         return <<"HERE";
 565 <table border="0" width="100%">
 566         <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
 567         <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
 568         <tr>
 569                 <td align="left">
 570                         @{[ $text ]}
 571                 </td>
 572                 <td align="right">
 573                         @{[ &{\&img}(@args_img) ]}
 574                 </td>
 575         </tr>
 576 </table>
 577 HERE
 578 }
 579
 580 sub readfile ($$)
 581 {
 582 my($class,$filename)=@_;
 583
 584         local *F;
 585         open F,$filename or die "Cannot open \"$filename\": $!";
 586         local $/=undef();
 587         my $data=<F>;
 588         close F;
 589         return $data;
 590 }
 591
 592 sub arr_keys (@)
 593 {
 594 my(@arr)=@_;
 595
 596         my @r=();
 597         while (@arr) {
 598                 push @r,shift @arr;     # key
 599                 shift @arr;     # val
 600                 }
 601         return @r;
 602 }
 603
 604 sub heading ()
 605 {
 606 my($class)=@_;
 607
 608         return if $W->{"heading_passed"}++;
 609
 610         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
 611         my $client_charset=$W->{"force_charset"} || "us-ascii";
 612         header("Content-Style-Type"=>"text/css");
 613         header("Content-Script-Type"=>"text/javascript");
 614
 615         while (my($key,$val)=each(%{$W->{"headers"}})) {
 616                 $W->{"r"}->header_out($key,$val);
 617                 }
 618         $W->{"r"}->send_http_header("text/html; charset=$client_charset");      # "Content-type"; do not use header()
 619
 620         return if $W->{"heading_done"}++;
 621         exit if $W->{"r"}->header_only();
 622
 623         if (1) { # || !$msie_major || $msie_major>=4) # TODO:dyn
 624                 Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n";
 625                 }
 626         Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
 627         Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">'."\n";
 628         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
 629         $title=~s#<[^>]*>##g;
 630         Wprint "<head>";
 631         Wprint "<title>$title</title>\n";
 632
 633         if ($W->{"have_css"}) {
 634                 Wprint <<'HERE';
 635 <style type="text/css"><!--
 636 .cvs-id   { font-family: monospace; }
 637 .error    { color: red;   background-color: transparent; }
 638 .quote    { font-family: monospace; }
 639 .nowrap   { white-space: nowrap; }
 640 .centered { text-align: center; }
 641 .tab-bold { font-weight: bold; }
 642 .tab-head { font-weight: bold; }
 643 /*
 644 .tab-head { font-weight: bold; color: yellow; background-color: transparent; }
 645 body {
 646                 background-color: black;
 647                 color: white;
 648                 }
 649 :link    { color: aqua;   background-color: transparent; }
 650 :visited { color: teal;   background-color: transparent; }
 651 h1,h2    { color: yellow; background-color: transparent; }
 652 */
 653 td       { padding: 2px; }
 654 caption  { caption-side: bottom; }
 655 .footer img { vertical-align: middle; }
 656 HERE
 657                 Wprint $W->{"head_css"}."\n";
 658                 Wprint "--></style>\n";
 659                 }
 660
 661         Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
 662         Wprint $W->{"head"};
 663         for my $type (qw(prev next index contents start up)) {
 664                 do { Wprint '<link rel="'.$type.'" href="'.$_.'" />'."\n" if $_; } for ($W->{"rel_$type"});
 665                 }
 666         Wprint "</head><body";
 667 #       Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
 668 #                       if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
 669         Wprint ">\n";
 670
 671         if ($W->{"heading"}) {
 672                 do { &{$_}() if $_; } for ($W->{"heading"});
 673                 }
 674 }
 675
 676 1;