Web.pm

   1 # $Id$
   2 # Common functions for HTML/XHTML output generation
   3 # Copyright (C) 2003-2005 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(
  31                 &Wrequire &Wuse
  32                 &path_web &path_abs_disk
  33                 &uri_escaped
  34                 &a_href &a_href_cc
  35                 &vskip
  36                 &img &centerimg &rightimg
  37                 $W
  38                 &input_hidden_persistents
  39                 &escapeHTML
  40                 );
  41 our @ISA=qw(Tie::Handle Exporter);
  42
  43 my %packages_used_hash; # $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
  44 my %packages_used_array;
  45
  46 BEGIN
  47 {
  48         use Carp qw(cluck confess);
  49         $W->{"__My::Web_init"}=1;
  50
  51         sub Wrequire ($)
  52         {
  53         my($file)=@_;
  54
  55 #               print STDERR "Wrequire $file\n";
  56                 $file=~s#/#::#g;
  57                 $file=~s/[.]pm$//;
  58                 my $class=$file;
  59                 $file=~s#::#/#g;
  60                 $file.=".pm";
  61                 my %callers;
  62                 for (my $depth=0;defined caller($depth);$depth++) {
  63                         $callers{caller($depth)}=1;
  64                         }
  65                 my $selfpkg=__PACKAGE__;
  66                 $callers{$selfpkg}=1;
  67                 for my $target ($class,__PACKAGE__) {
  68                         for my $caller (keys(%callers)) {
  69                                 next if $caller eq $target;
  70                                 next if $packages_used_hash{$caller}{$target}++;
  71                                 push @{$packages_used_array{$caller}},$target;
  72                                 }
  73                         }
  74                 eval { CORE::require "$file"; } or confess $@;
  75                 1;      # Otherwise 'require' would already file above.
  76         }
  77
  78         sub Wuse ($@)
  79         {
  80         my($file,@list)=@_;
  81
  82 #               print STDERR "Wuse $file\n";
  83                 Wrequire $file;
  84                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  85                 $file->import(@list);
  86                 1;
  87         }
  88
  89         sub import
  90         {
  91         my($class,@rest)=@_;
  92
  93                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  94                 Wrequire("$class");
  95                 return $class->SUPER::import(@rest);
  96         }
  97 }
  98
  99 use WebConfig;  # see also below: Wuse 'WebConfig';
 100 require CGI;
 101 require Image::Size;    # for &imgsize
 102 use File::Basename;     # &basename
 103 use Carp qw(cluck confess);
 104 use URI::Escape;
 105 require HTTP::BrowserDetect;
 106 require HTTP::Negotiate;
 107 our $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
 108 # Do not: use ModPerl::Util qw(exit);
 109 # to prevent in mod_perl2: "exit" is not exported by the ModPerl::Util module
 110 # I do not know why.
 111 use POSIX qw(strftime);
 112 use Tie::Handle;
 113 use Apache2::Const qw(HTTP_MOVED_TEMPORARILY OK HTTP_OK);
 114 use URI;
 115 use URI::QueryParam;
 116 use Cwd;
 117 require HTTP::Date;
 118 require Storable;
 119 require Digest::MD5;
 120 require Data::Compare;
 121 use Data::Dumper;
 122 require Encode;
 123 use Apache2::Filter;
 124 use Apache2::Connection;
 125
 126
 127 #our $W;
 128
 129 sub cleanup($)
 130 {
 131 my($apache_request)=@_;
 132
 133         $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
 134         cache_finish();
 135         # Sanity protection.
 136         $W=undef();
 137         return OK;
 138 }
 139
 140 sub request_check(;$)
 141 {
 142 my($self)=@_;
 143
 144         # Use &eval to prevent: Global $r object is not available. Set:\n\tPerlOptions +GlobalRequest\nin ...
 145         # CGI requires valid "r": check it beforehand here.
 146         confess "Calling sensitive dynamic code from a static code" if !eval { Apache2::RequestUtil->request(); };
 147         # Do not: confess "Calling sensitive dynamic code without My::Web::init" if !$W->{"__PACKAGE__"};
 148         # as it is valid at least while preparing arguments to call: &project::Lib::init
 149 }
 150
 151 sub init ($%)
 152 {
 153 my($class,%args)=@_;
 154
 155         print STDERR "$class->init ".Apache2::RequestUtil->request()->unparsed_uri()."\n";
 156
 157         # We need to track package dependencies, so we need to call it from &init.
 158         # We cannot do it in BEGIN { } block
 159         # as it would not be tracked for each of the toplevel users later.
 160         Wuse 'WebConfig';
 161         Wrequire 'My::Hash';
 162
 163         $W=My::Hash->new({
 164                 "__PACKAGE__"=>scalar(caller()),
 165                 %WebConfig,
 166                 %args,  # override %WebConfig settings
 167                 },"My::Hash::Sub","My::Hash::Push");
 168
 169         # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
 170         # $Apache2::Registry::curstash is no longer supported.
 171         do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
 172
 173         # See: &escapeHTML
 174         do { cluck "charset==$_, expecting ISO-8859-1" if $_ ne "ISO-8859-1"; } for CGI::charset();
 175         CGI::charset("utf-8");
 176
 177         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_ent";
 178         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_js";
 179         do { $W->{$_}=1  if !defined $W->{$_}; } for "have_css";        # AFAIK it does not hurt anyone.
 180         do { $W->{$_}=0  if !defined $W->{$_}; } for "css_inherit";
 181         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer";
 182         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_delimit";
 183         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_ids";
 184         do { $W->{$_}=1  if !defined $W->{$_}; } for "indexme";
 185         do { $W->{$_}="" if !defined $W->{$_}; } for "head";
 186         do { $W->{$_}="" if !defined $W->{$_}; } for "body_attr";
 187         do { $W->{$_}="en-US" if !defined $W->{$_}; } for "language";
 188
 189         my $footer_any=0;
 190         for (qw(footer_ids)) {
 191                 $W->{$_}=0 if !$W->{"footer"};
 192                 $footer_any=1 if $W->{$_};
 193                 }
 194         $W->{"footer"}=0 if !$footer_any;
 195         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 196
 197         $W->{"r"}=Apache2::RequestUtil->request();
 198
 199         $W->{"r"}->push_handlers("PerlCleanupHandler"=>\&cleanup);
 200
 201         $W->{"web_hostname"}||=$W->{"r"}->hostname();
 202
 203         tie *STDOUT,$W->{"r"};
 204         select *STDOUT;
 205         $|=1;
 206
 207         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 208         if ($W->{"detect_ent"}) {
 209                          if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 210                         { $W->{"have_ent"}=0; }
 211                 elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 212                         { $W->{"have_ent"}=1; }
 213                 else
 214                         { delete $W->{"have_ent"}; }
 215                 if (!defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 216                         $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 217                                         .escapeHTML("http://".$W->{"web_hostname"}."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 218                                                         ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 219                                         .'" />'."\n";
 220                         }
 221                 }
 222         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 223         $W->{"r"}->args($W->{"QUERY_STRING"});
 224         # Workaround: &CGI::Vars behaves weird if strings passed both as POST data and in: $QUERY_STRING
 225         do { $W->{"r"}->args(""); delete $ENV{"QUERY_STRING"}; } if $W->{"r"}->method() eq "POST";
 226         # Do not: $W->{"r"}->args()
 227         # as it parses only QUERY_STRING (not POST data).
 228         $W->{"args_orig_array"}=[ CGI->new($W->{"r"})->Vars() ];
 229         $W->{"args"}={ @{$W->{"args_orig_array"}} };
 230         for my $name (keys(%{$W->{"args"}})) {
 231                 my @vals=split /\x00/,$W->{"args"}{$name};
 232                 next if @vals<=1;
 233                 $W->{"args"}{$name}=[@vals];
 234                 }
 235
 236         $W->{"headers_in"}=$W->{"r"}->headers_in();
 237         Wrequire 'My::Hash::Merge';
 238         $W->{"headers_in"}=My::Hash::Merge->new(
 239                         $W->{"headers_in"},
 240                         My::Hash::Sub->new({
 241                                 "_remote_ip"=>sub { return $W->{"r"}->connection()->remote_ip(); },
 242                                 }),
 243                         );
 244         $W->{"headers_in"}=My::Hash::Readonly->new($W->{"headers_in"});
 245
 246         if ($W->{"r"}->method() eq "GET" || $W->{"r"}->method() eq "HEAD") {
 247                 for (\$W->{"http_safe"}) {
 248                         # Extend the current ETag system instead if you would need it:
 249                         cluck "Explicitely NOT HTTP-Safe for method \"".$W->{"r"}->method()."\"?!?"
 250                                         if defined($$_) && !$$_;
 251                         $$_=1 if !defined $$_;
 252                         }
 253                 }
 254         else {
 255                 for (\$W->{"http_safe"}) {
 256                         cluck "Undefined HTTP-Safe-ty for method \"".$W->{"r"}->method()."\"!"
 257                                         if !defined($$_);
 258                         $$_=0 if !defined $$_;
 259                         }
 260                 }
 261         if ($W->{"http_safe"}) {
 262                 Wrequire 'My::Hash::RecordKeys';
 263                 $W->{"headers_in_RecordKeys"}=My::Hash::RecordKeys->new($W->{"headers_in"});
 264                 $W->{"headers_in"}=$W->{"headers_in_RecordKeys"};
 265                 }
 266
 267         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"headers_in"}{"User-Agent"});
 268
 269         if (!defined $W->{"have_style"}) {
 270                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
 271                 }
 272
 273         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 274         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 275                 $W->{"head"}.='<script type="text/javascript" src="'.uri_escaped(path_web('/have_js.pm')).'"></script>'."\n";
 276                 }
 277
 278         do { _args_check(%$_) if $_; } for ($W->{"args_check"});
 279
 280         return bless $W,$class;
 281 }
 282
 283 # Be aware other parts of code (non-My::Web) will NOT use this function!
 284 # Do not: Wprint $W->{"heading"},"undef"=>1;
 285 # as we would need to undef() it to turn it off and it would get defaulted in such case.
 286 # Do not: exists $W->{"heading"}
 287 # as we use a lot of 'for $W->{"heading"}' which instantiates it with the value: undef()
 288 sub Wprint($%)
 289 {
 290 my($text,%args)=@_;
 291
 292         cluck "undef Wprint" if !defined $text && !$args{"undef"};
 293         delete $args{"undef"};
 294         cluck join(" ","Invalid arguments:",keys(%args)) if keys(%args);
 295         return if !defined $text;
 296         cluck "utf-8 untested" if Encode::is_utf8($text);
 297         $W->{"r"}->puts($text);
 298 }
 299
 300 sub escapeHTML($)
 301 {
 302 my($text)=@_;
 303
 304         # Prevent &CGI::escapeHTML breaking utf-8 strings like: \xC4\x9B eq \x{11B}
 305         # Prevent case if we run under mod_perl but still just initializing:
 306         request_check() if $ENV{"MOD_PERL"};
 307         # Generally we are initialized from &init but we may be used without it without mod_perl
 308         # and in such case check the change on all non-first invocations.
 309         our $init;
 310         if (!$ENV{"MOD_PERL"} && $init++) {
 311                 do { cluck "charset==$_" if $_ ne "utf-8"; } for CGI::charset();
 312                 }
 313         CGI::charset("utf-8");
 314
 315         return CGI::escapeHTML($text);
 316 }
 317
 318 # local *FH;
 319 # tie *FH,ref($W),$W;
 320 sub TIEHANDLE($)
 321 {
 322 my($class,$W)=@_;
 323
 324         my $self={};
 325         $self->{"W"}=$W or confess "Missing W";
 326         return bless $self,$class;
 327 }
 328
 329 sub WRITE
 330 {
 331 my($self,$scalar,$length,$offset)=@_;
 332
 333         Wprint substr($scalar,0,$length);
 334 }
 335
 336 # /home/user/www/webdir
 337 sub dir_top_abs_disk()
 338 {
 339         our $dir_top_abs_disk;
 340         if (!$dir_top_abs_disk) {
 341                 my $selfpkg_relpath=__PACKAGE__;
 342                 $selfpkg_relpath=~s{::}{/}g;
 343                 $selfpkg_relpath.=".pm";
 344                 my $selfpkg_abspath=$INC{$selfpkg_relpath} or do {
 345                         cluck "Unable to find self package $selfpkg_relpath";
 346                         return;
 347                         };
 348                 $selfpkg_abspath=~s{/*\Q$selfpkg_relpath\E$}{} or do {
 349                         cluck "Unable to strip myself \"$selfpkg_relpath\" from the abspath: $selfpkg_abspath";
 350                         return;
 351                         };
 352                 cluck "INC{myself} is relative?: $selfpkg_abspath" if $selfpkg_abspath!~m{^/};
 353                 $dir_top_abs_disk=$selfpkg_abspath;
 354                 }
 355         return $dir_top_abs_disk;
 356 }
 357
 358 sub unparsed_uri()
 359 {
 360         request_check();
 361         if (!$W->{"unparsed_uri"}) {
 362                 # Do not: $W->{"r"}
 363                 # as we may be called before &init from: &My::Project::init
 364                 my $r=Apache2::RequestUtil->request();
 365                 cluck "Calling ".'&unparsed_uri'." from a static code, going to fail" if !$r;
 366                 my $uri_string=$r->unparsed_uri() or cluck "Valid 'r' missing unparsed_uri()?";
 367                 my $uri=URI->new_abs($uri_string,"http://".$W->{"web_hostname"}."/");
 368                 $W->{"unparsed_uri"}=$uri;
 369                 }
 370         return $W->{"unparsed_uri"};
 371 }
 372
 373 sub in_to_uri_abs($)
 374 {
 375 my($in)=@_;
 376
 377         # Otherwise we may have been already processed and thus legally relativized.
 378         # FIXME data: Currently disabled, all the data are too violating such rule.
 379         if (0 && !ref $in) {
 380                 my $uri_check=URI->new($in);
 381                 $uri_check->scheme() || $in=~m{^\Q./\E} || $in=~m{^/}
 382                                 or cluck "Use './' or '/' prefix for all the local references: $in";
 383                 }
 384         my $uri=URI->new_abs($in,unparsed_uri());
 385         $uri=$uri->canonical();
 386         return $uri;
 387 }
 388
 389 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 390 # $args{"abs"}=1;
 391 sub path_web($%)
 392 {
 393 my($in,%args)=@_;
 394
 395         cluck if !$args{"uri_as_in"} && ref $in;
 396         my $uri=in_to_uri_abs($in);
 397         if (uri_is_local($uri)) {
 398                 # Prefer the $uri values over "args_persistent" values.
 399                 $uri->query_form_hash({
 400                                 map({
 401                                         my $key=$_;
 402                                         my $val=$W->{"args"}{$key};
 403                                         (!defined $val ? () : ($key=>$val));
 404                                         } keys(%{$W->{"args_persistent"}})),
 405                                 %{$uri->query_form_hash()},
 406                                 });
 407                 }
 408         return $uri->abs(unparsed_uri()) if $W->{"args"}{"Wabs"} || $args{"abs"};
 409         return $uri->rel(unparsed_uri());
 410 }
 411
 412 sub path_abs_disk_register($)
 413 {
 414 my($path_abs_disk)=@_;
 415
 416         $W->{"path_abs_disk_register"}{$path_abs_disk}=1;
 417 }
 418
 419 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 420 sub path_abs_disk($%)
 421 {
 422 my($in,%args)=@_;
 423
 424         cluck if !$args{"uri_as_in"} && ref $in;
 425         my $uri=in_to_uri_abs($in);
 426         cluck if !uri_is_local($uri);
 427         my $path=$uri->path();
 428         cluck "URI compatibility: ->path() not w/leading slash of URI \"$uri\"; path: $path" if $path!~m{^/};
 429         my $r=dir_top_abs_disk().$path;
 430         path_abs_disk_register $r if !defined $args{"register"} || $args{"register"};
 431         return $r;
 432 }
 433
 434 sub fatal (;$);
 435
 436 sub _args_check (%)
 437 {
 438 my(%tmpl)=@_;
 439
 440         while (my($name,$regex)=each(%tmpl)) {
 441                 my $name_html="Parameter <span class=\"quote\">".escapeHTML($name)."</span>";
 442                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 443                 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
 444                 fatal "$name_html passed as multivar although singlevar expected"
 445                                 if ref $W->{"args"}{$name} && !ref $regex;
 446                 $regex=$regex->[0] if ref $regex;
 447                 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
 448                         $val="" if !defined $val;
 449                         fatal "$name_html <span class=\"quote\">".escapeHTML($val)."</span>"
 450                                                         ." does not match the required regex <span class=\"quote\">".escapeHTML($regex)."</span> "
 451                                         if $regex ne "" && $val!~/$regex/;
 452                         }
 453                 }
 454 }
 455
 456 sub vskip (;$)
 457 {
 458 my($height)=@_;
 459
 460         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 461 }
 462
 463 sub fatal (;$)
 464 {
 465 my($msg)=@_;
 466
 467         $msg="UNKNOWN" if !$msg;
 468         cluck "FATAL: $msg";
 469
 470         # Do not send it unconditionally.
 471         # The intial duplicated '<?xml...' crashes Gecko parser.
 472         $W->{"heading_done"}=0 if $W->{"header_only"};
 473         # Do not send it unconditionally.
 474         # Prevents warn: Headers already sent
 475         if (!$W->{"heading_done"}) {
 476                 $W->{"indexme"}=0;      # For the case no heading was sent yet.
 477                 $W->{"header_only"}=0;  # assurance for &heading
 478                 My::Web->heading();
 479                 }
 480         Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 481                         ."<p>You can report this problem's details to"
 482                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 483         footer();
 484 }
 485
 486 sub footer (;$)
 487 {
 488         exit 1 if $W->{"footer_passed"}++;      # deadlock prevention:
 489
 490         Wprint vskip if $W->{"footer_delimit"};
 491
 492         do { Wprint $_ if $_; } for $W->{"footing_delimit"};
 493
 494         Wprint "<hr />\n" if $W->{"footer"};
 495
 496         my $packages_used=$packages_used_array{$W->{"__PACKAGE__"}};
 497
 498         if ($W->{"footer_ids"}) {
 499                 Wprint '<p class="cvs-id">';
 500                 Wprint join("<br />\n",map({ my $package=$_;
 501                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 502 #                                       || $package     # debug
 503                                         );
 504                         if (!$cvs_id) {
 505                                 ();
 506                                 }
 507                         else {
 508                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 509                                 my @cvs_id_split=split / +/,$cvs_id;
 510                                 if (@cvs_id_split==8) {
 511                                         my $file=$package;
 512                                         $file=~s#::#/#g;
 513                                         my $ext;
 514                                         my @tried;
 515                                         for (qw(.pm)) {
 516                                                 $ext=$_;
 517                                                 my $path_abs_disk=path_abs_disk("/$file$ext");
 518                                                 push @tried,$path_abs_disk;
 519                                                 last if -r $path_abs_disk;
 520                                                 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
 521                                                 }
 522                                         $file.=$ext;
 523                                         $cvs_id_split[2]=""
 524                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 525                                                                         $cvs_id_split[2]);
 526                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 527                                                         ($package!~/^Apache2::/ ? $package : $cvs_id_split[1]));
 528                                         $cvs_id_split[5]=&{$W->{"cvs_id_author_sub"}}($cvs_id_split[5]);
 529                                         }
 530                                 join " ",@cvs_id_split;
 531                                 }
 532                         } @$packages_used));
 533                 Wprint "</p>\n";
 534                 }
 535
 536         for my $package (@$packages_used) {
 537                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 538 #                               || $package     # debug
 539                                 );
 540                 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 541                 }
 542
 543         do { Wprint $_ if $_; } for $W->{"footing"};
 544
 545         Wprint "</body></html>\n";
 546         exit 0;
 547 }
 548
 549 # Existing entries are overwritten.
 550 sub header(%)
 551 {
 552 my(%pairs)=@_;
 553
 554         while (my($key,$val)=each(%pairs)) {
 555                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 556                 $W->{"r"}->headers_out()->set($key,$val);
 557                 }
 558 }
 559
 560 sub size_display ($)
 561 {
 562 my($size)=@_;
 563
 564            if ($size<4096)
 565                 {}
 566         elsif ($size<1024*1024)
 567                 { $size=sprintf "%.1fK",$size/1024; }
 568         else
 569                 { $size=sprintf "%.1fM",$size/1024/1024; }
 570         $size.="B";
 571         return $size;
 572 }
 573
 574 sub uri_is_local($)
 575 {
 576 my($in)=@_;
 577
 578         my $uri_rel=in_to_uri_abs($in)->rel(unparsed_uri());
 579         # Do not: defined $uri_rel->("userinfo"|"host"|"port")();
 580         # as they fail to be called for schemes not supporting them.
 581         return 0 if $uri_rel->scheme();
 582         return 0 if $uri_rel->authority();
 583         return 1;
 584 }
 585
 586 # &path_web still may be required for &uri_escaped !
 587 sub uri_escaped($)
 588 {
 589 my($uri)=@_;
 590
 591         cluck if !ref $uri;
 592         my $urient=escapeHTML($uri);
 593         return $uri    if $uri eq $urient;
 594         request_check();
 595         return $urient if uri_is_local $uri;
 596         return $uri    if defined $W->{"have_ent"} && !$W->{"have_ent"};        # non-ent client
 597         return $urient if $W->{"have_ent"};     # ent client
 598         # Unknown client, &escapeHTML should not be needed here:
 599         return escapeHTML(path_web('/Redirect.pm?location='.uri_escape($uri->abs(unparsed_uri()))));
 600 }
 601
 602 our $a_href_inhibited;
 603 sub a_href($;$%)
 604 {
 605 my($in,$contents,%args)=@_;
 606
 607         request_check();
 608         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 609         if (!defined $contents) {
 610                 $contents=$in;
 611                 $contents=File::Basename::basename($contents) if $args{"basename"};
 612                 $contents=escapeHTML($contents);
 613                 }
 614         $contents=~s#<a\b[^>]*>##gi;
 615         $contents=~s#</a>##gi;
 616         return $contents if $a_href_inhibited;
 617
 618         my $path_web=path_web $in,%args;
 619         my $r="";
 620         $r.='<a href="';
 621         $r.=uri_escaped $path_web;
 622         $r.='"';
 623         do { $r.=" $_" if $_; } for ($args{"attr"});
 624         $r.='>'.$contents.'</a>';
 625         if ($args{"size"} && uri_is_local($in) && ($args{"size"}>=2 || $in=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) {   # Downloadable?
 626                 my $path_abs_disk=path_abs_disk $in,%args;
 627                 cluck "File not readable: $path_abs_disk" if !-r $path_abs_disk;
 628                 $r.='&nbsp;('.size_display((stat($path_abs_disk))[7]).')';
 629                 }
 630         return $r;
 631 }
 632
 633 sub a_href_inhibit($$;@)
 634 {
 635 my($self,$sub,@sub_args)=@_;
 636
 637         local $a_href_inhibited=1;
 638         return &{$sub}(@sub_args);
 639 }
 640
 641 sub input_hidden_persistents()
 642 {
 643         request_check();
 644         return join("",map({
 645                 my $key=$_;
 646                 my $val=$W->{"args"}{$key};
 647                 (!defined $val ? () : '<input type="hidden"'
 648                                 .' name="'.escapeHTML($key).'"'
 649                                 .' value="'.escapeHTML($val).'"'
 650                                 .' />'."\n");
 651                 } (keys(%{$W->{"args_persistent"}}))));
 652 }
 653
 654 sub http_moved($$;$)
 655 {
 656 my($self,$url,$status)=@_;
 657
 658         $url=path_web($url,"abs"=>1);
 659         $status||=HTTP_MOVED_TEMPORARILY;
 660         $W->{"r"}->status($status);
 661         $W->{"r"}->headers_out()->{"Location"}=$url;
 662         $W->{"header_only"}=1;
 663         My::Web->heading();
 664         exit;
 665         die "NOTREACHED";
 666 }
 667
 668 sub remote_ip ()
 669 {
 670         # Do not: PerlModule                 Apache2::ForwardedFor
 671         #         PerlPostReadRequestHandler Apache2::ForwardedFor
 672         # As 'Apache2::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 673         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 674         # We must take the last item ourselves.
 675         # Be VERY sure you always retrieve all the headers unconditionally to hit: My::Hash::RecordKeys
 676         my $x_forwarded_for=$W->{"headers_in"}{"X-Forwarded-For"};
 677         $x_forwarded_for=~s/^.*,\s*// if $x_forwarded_for;
 678         my $remote_ip=$W->{"headers_in"}{"_remote_ip"};
 679         my $r;
 680         $r||=$x_forwarded_for;
 681         $r||=$remote_ip;
 682         return $r;
 683 }
 684
 685 # $url={"JP"=>"http://specific",...};
 686 # $url={""=>"http://default",...};
 687 sub a_href_cc($$;%)
 688 {
 689 my($url,$contents,%args)=@_;
 690
 691         my $cc;
 692         $cc||=Geo::IP->new()->country_code_by_addr(remote_ip()) if $have_Geo_IP;
 693         $cc||="";
 694         $url=$url->{$cc};
 695         return $contents if !$url;
 696         return a_href $url,$contents,%args;
 697 }
 698
 699 sub make ($)
 700 {
 701 my($cmd)=@_;
 702
 703         # FIXME: &alarm, --timeout is now infinite.
 704         # FIXME: Try to remove bash(1).
 705         # FIXME: Use: @PATH_FLOCK@
 706         my @argv=('flock',dir_top_abs_disk(),'bash','-c',$cmd.' >&2');
 707         print STDERR join(" ","SPAWN:",@argv)."\n";
 708         system @argv;
 709 }
 710
 711 sub make_file($$)
 712 {
 713 my($self,$file)=@_;
 714
 715         cluck "Pathname not absolute: $file" if $file!~m{^/};
 716         return if -f $file;
 717         # TODO: Somehow quickly check dependencies?
 718         return make('make -s --no-print-directory'
 719                                         .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'");
 720 }
 721
 722 sub img_size ($$)
 723 {
 724 my($width,$height)=@_;
 725
 726         cluck if !defined $width || !defined $height;
 727         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 728                         ." width=\"$width\" height=\"$height\"";
 729 }
 730
 731 sub negotiate_variant (%)
 732 {
 733 my(%args)=@_;
 734
 735         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 736         return [ map(($args{$_}),@fields) ];
 737 }
 738
 739 # Input: $self is required!
 740 # Input: Put the fallback variant as the first one.
 741 # Returns: always only scalar!
 742 sub Negotiate_choose($$)
 743 {
 744 my($self,$variants)=@_;
 745
 746         # Limit these entries to generate proper 'Vary' header.
 747         my %hash=(map(($_=>$W->{"headers_in"}{$_}),qw(
 748                         Accept
 749                         Accept-Charset
 750                         Accept-Encoding
 751                         Accept-Language
 752                         )));
 753         my $best=HTTP::Negotiate::choose($variants,
 754                         # Do not: $W->{"r"}
 755                         # to prevent: Can't locate object method "scan" via package "Apache2::RequestRec" at HTTP/Negotiate.pm line 84.
 756                         # Do not: $W->{"r"}->headers_in()
 757                         # to prevent: Can't locate object method "scan" via package "APR::Table" at HTTP/Negotiate.pm line 84.
 758                         # Do not: HTTP::Headers->new($W->{"r"}->headers_in());
 759                         # to prevent empty result or even: Odd number of elements in anonymous hash
 760                         HTTP::Headers->new(%hash));
 761         $best||=$variants->[0][0];      # $variants->[0]{"id"}; &HTTP::Negotiate::choose failed?
 762         return $best;
 763 }
 764
 765 my @img_variants=(
 766                 { "id"=>"png","qs"=>0.9,"content-type"=>"image/png" },
 767                 { "id"=>"gif","qs"=>0.7,"content-type"=>"image/gif" },
 768                 );
 769 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 770
 771 # Returns: ($path_web,$path_abs_disk)
 772 # URI path segments support ignored here. Where it is used? (';' path segment options)
 773 sub _img_src($%)
 774 {
 775 my($in,%args)=@_;
 776
 777         cluck if !uri_is_local $in;
 778         my $uri=in_to_uri_abs $in;
 779         my $path_abs_disk=path_abs_disk $uri,%args,"uri_as_in"=>1,"register"=>0;
 780
 781         # Known image extension?
 782         return path_web($uri,%args,"uri_as_in"=>1),$path_abs_disk if $uri->path()=~m#$img_variants_re#o;
 783
 784         my @nego_variants;
 785         for my $var (@img_variants) {
 786                 my $path_abs_disk_variant=$path_abs_disk.".".$var->{"id"};
 787                 path_abs_disk_register($path_abs_disk_variant);
 788                 __PACKAGE__->make_file($path_abs_disk_variant);
 789                 push @nego_variants,negotiate_variant(
 790                                 %$var,
 791                                 "size"=>(stat $path_abs_disk_variant)[7],
 792                                 );
 793                 }
 794         my $ext=__PACKAGE__->Negotiate_choose(\@nego_variants);
 795
 796         $uri->path($uri->path().".$ext");
 797         return path_web($uri,%args,"uri_as_in"=>1),path_abs_disk($uri,%args,"uri_as_in"=>1);
 798 }
 799
 800 # $args{"attr"}
 801 sub img ($$%)
 802 {
 803 my($in,$alt,%args)=@_;
 804
 805         request_check();
 806         my($path_web,$path_abs_disk)=_img_src($in,%args);
 807         my($width,$height)=Image::Size::imgsize($path_abs_disk);
 808         $alt=~s/<[^>]*>//g;
 809         $alt=escapeHTML($alt);
 810         my $content="<img src=\"".uri_escaped($path_web)."\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 811                         .(!$args{"attr"} ? "" : " ".$args{"attr"})." />";
 812         do { return a_href((_img_src($_))[0],$content,"uri_as_in"=>1) if $_; } for $args{"a_href_img"};
 813         do { return a_href $_,$content if $_; } for $args{"a_href"};
 814         return $content;
 815 }
 816
 817 sub centerimg
 818 {
 819         my $r="";
 820         $r.='<table border="0" width="100%"><tr>'."\n";
 821         @_=( [@_] ) if !ref $_[0];
 822         for (@_) {
 823                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 824                 }
 825         $r.='</tr></table>'."\n";
 826         return $r;
 827 }
 828
 829 sub rightimg
 830 {
 831 my($text,@args_img)=@_;
 832
 833         # FIXME: Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
 834         #        <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
 835         #        <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
 836         # causes whole invisible projects in: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Galeon/1.3.21
 837         return <<"HERE";
 838 <table border="0" width="100%">
 839         <tr>
 840                 <td align="left">
 841                         @{[ $text ]}
 842                 </td>
 843                 <td align="right">
 844                         @{[ &{\&img}(@args_img) ]}
 845                 </td>
 846         </tr>
 847 </table>
 848 HERE
 849 }
 850
 851 sub readfile($$)
 852 {
 853 my($class,$filename)=@_;
 854
 855         local *F;
 856         open F,$filename or cluck "Cannot open \"$filename\": $!";
 857         my $F=do { local $/=undef(); <F>; };
 858         close F or cluck "Cannot close \"$filename\": $!";
 859         return $F;
 860 }
 861
 862 sub _no_cache($)
 863 {
 864 my($self)=@_;
 865
 866         header("Expires"=>HTTP::Date::time2str(1000000000));    # date in the past
 867         header("Last-Modified"=>HTTP::Date::time2str());        # always modified
 868         header("Cache-Control"=>join(", ",
 869                         "no-cache",
 870                         "no-store",
 871                         "must-revalidate",
 872                         "max-age=0",
 873                         "pre-check=0",  # MSIE
 874                         "post-check=0", # MSIE
 875                         ));     # HTTP/1.1
 876         header("Pragma"=>"no-cache");   # HTTP/1.0
 877         header("Vary"=>"*");    # content may ba based on unpredictable sources
 878 }
 879
 880 sub headers_in_filtered(@)
 881 {
 882 my(@keys)=@_;
 883
 884         return map(($_=>$W->{"headers_in"}{$_}),@keys);
 885 }
 886
 887 our %uri_args_frozen_to_headers_in_keys;
 888 our %uri_args_headers_in_frozen_to_headers_out;
 889
 890 sub uri_args_headers_in_frozen_get($)
 891 {
 892 my($headers_in_keys_arrayref)=@_;
 893
 894         my %uri_args_headers_in_hash=(
 895                 "uri_args_frozen"=>$W->{"uri_args_frozen"},
 896                 "headers_in"=>{ headers_in_filtered(@$headers_in_keys_arrayref) },
 897                 );
 898         return do { local $Storable::canonical=1; Storable::freeze(\%uri_args_headers_in_hash); };
 899 }
 900
 901 sub cache_output_filter($)
 902 {
 903 my($f)=@_;
 904
 905         while ($f->read(my $text,0x400)) {
 906                 cluck "utf-8 untested" if Encode::is_utf8($text);       # Possible here at all?
 907                 $f->print($text);
 908                 $W->{"digest-md5"}->add($text);
 909                 }
 910         return OK;
 911 }
 912
 913 sub cache_start()
 914 {
 915         if (!$W->{"http_safe"}) {
 916                 __PACKAGE__->_no_cache();
 917                 return;
 918                 }
 919
 920         {
 921                 # &Wrequire it here even if it will not be later used; to be stable!
 922                 Wrequire 'My::Hash::RestrictTo';
 923                 my %uri_args_hash=(
 924                         "uri"=>"http://".$W->{"web_hostname"}."/".$W->{"r"}->uri(),
 925                         "args"=>$W->{"args_orig_array"},
 926                         );
 927                 $W->{"uri_args_frozen"}=do { local $Storable::canonical=1; Storable::freeze(\%uri_args_hash); };
 928                 last if !(my $headers_in_keys_arrayref=$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}});
 929
 930                 # Protection to be sure we are stable:
 931                 $W->{"headers_in"}=My::Hash::RestrictTo->new($W->{"headers_in"},@$headers_in_keys_arrayref);
 932
 933                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get($headers_in_keys_arrayref);
 934                 last if !(my $headers_out_hashref=$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}});
 935                 header(%$headers_out_hashref);
 936                 my $status;
 937                 {
 938                         # &meets_conditions will always deny the attempt if !2xx status().
 939                         # At least ap_read_request() sets: r->status=HTTP_REQUEST_TIME_OUT;     /* Until we get a request */
 940                         my $status_old=$W->{"r"}->status();
 941                         $W->{"r"}->status(HTTP_OK);
 942                         # Update httpd's 'r->mtime' as the header "Last-Modified" is just not enough for ap_meets_conditions():
 943                         # &update_mtime() argument is really in _secs_, not in _msecs_ as the docs claim.
 944                         # Be aware '*1000000' would overflow Perl integer anyway.
 945                         # &set_last_modified would also override the "Last-Modified" headers_out!
 946                         # &mtime may exist but somehow does not work.
 947                         $W->{"r"}->update_mtime(HTTP::Date::str2time($headers_out_hashref->{"Last-Modified"}));
 948                         $status=$W->{"r"}->meets_conditions();
 949                         $W->{"r"}->status($status_old);
 950                         }
 951                 last if OK==$status;
 952                 $W->{"r"}->status($status);
 953                 exit 0;
 954                 die "NOTREACHED";
 955                 }
 956
 957         $W->{"digest-md5"}=Digest::MD5->new();
 958         $W->{"cache_active"}=1;
 959         $W->{"r"}->add_output_filter(\&cache_output_filter);
 960 }
 961
 962 sub cache_finish_last_modified()
 963 {
 964         cluck "Not yet done now? W __PACKAGE__: ".$W->{"__PACKAGE__"}
 965                         if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
 966         for my $package_orig (@{$packages_used_array{$W->{"__PACKAGE__"}}}) {
 967                 local $_=$package_orig.".pm";
 968                 s{::}{/}g;
 969                 path_abs_disk "/$_","register"=>1;
 970                 }
 971         my $mtime_newest;
 972         for my $path_abs_disk (keys(%{$W->{"path_abs_disk_register"}})) {
 973                 my $mtime=(stat $path_abs_disk)[9];
 974                 do { cluck "No mtime for: $path_abs_disk"; next; } if !$mtime;
 975                 $mtime_newest=$mtime if !$mtime_newest || $mtime_newest<$mtime;
 976                 }
 977         cluck "No mtime_newest found for the current W __PACKAGE__: ".$W->{"__PACKAGE__"}
 978                         if !$mtime_newest;
 979         return HTTP::Date::time2str($mtime_newest);
 980 }
 981
 982
 983 sub cache_finish()
 984 {
 985         # Do not: return if !$W->{"uri_args_frozen"};
 986         # as we may have just gave 304 and 'exit 0;' without starting the caching.
 987         return if !$W->{"cache_active"};
 988
 989         # Fill-in/check: %uri_args_frozen_to_headers_in_keys
 990         my $headers_in_keys_stored_arrayref_ref=\$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}};
 991         my @headers_in_keys=tied(%{$W->{"headers_in_RecordKeys"}})->accessed();
 992         if (!$$headers_in_keys_stored_arrayref_ref
 993                         || !Data::Compare::Compare(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)) {
 994                 cluck "Non-matching generated 'headers_in_keys' per 'uri_args_frozen' key:\n"
 995                                                 .Dumper(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)
 996                                 if $$headers_in_keys_stored_arrayref_ref;
 997                 # Build or possibly prevent such further warn dupes:
 998                 $$headers_in_keys_stored_arrayref_ref=\@headers_in_keys;
 999                 # Build or regenerate as obsoleted now:
1000                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get(\@headers_in_keys);
1001                 }
1002
1003         # Prepare 'headers_out' for the future reusal:
1004         my %headers_out;
1005         $headers_out{"Content-MD5"}=$W->{"digest-md5"}->b64digest();
1006         # In fact we could also use MD5 for ETag as if we know ETag we also know MD5.
1007         # But this way we do not need to calculate MD5 and we still can provide such ETag. So.
1008         # $W->{"r"}->set_etag() ?
1009         $headers_out{"ETag"}='"'.Digest::MD5::md5_base64($W->{"uri_args_headers_in_frozen"}).'"';
1010         # $W->{"r"}->set_content_length() ?
1011         $headers_out{"Content-Length"}=$W->{"r"}->bytes_sent();
1012         my %Vary=map(($_=>1),(@headers_in_keys));
1013         for (keys(%Vary)) {
1014                 next if !/^_/;
1015                 $Vary{"*"}=1;
1016                 delete $Vary{$_};
1017                 }
1018         %Vary=("*"=>1) if $Vary{"*"};
1019         $headers_out{"Vary"}=join(", ",sort keys(%Vary));
1020         # $W->{"r"}->set_last_modified() ?
1021         $headers_out{"Last-Modified"}=cache_finish_last_modified();
1022
1023         # Fill-in/check: %uri_args_headers_in_frozen_to_headers_out
1024         my $headers_out_stored_hashref_ref=\$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}};
1025         if (!$$headers_out_stored_hashref_ref
1026                         || !Data::Compare::Compare(\%headers_out,$$headers_out_stored_hashref_ref)) {
1027                 cluck "Non-matching generated 'headers_out' per 'uri_args_headers_in_frozen' key:\n"
1028                                                 .Dumper(\%headers_out,$$headers_out_stored_hashref_ref)
1029                                 if $$headers_out_stored_hashref_ref;
1030                 # Build or possibly prevent such further warn dupes:
1031                 $$headers_out_stored_hashref_ref=\%headers_out;
1032                 }
1033
1034 ###print STDERR Dumper(\%uri_args_frozen_to_headers_in_keys,\%uri_args_headers_in_frozen_to_headers_out);
1035 }
1036
1037 sub heading()
1038 {
1039 my($class)=@_;
1040
1041         if (!$W->{"header_only"}) {
1042                 header("Content-Style-Type"=>"text/css");
1043                 header("Content-Script-Type"=>"text/javascript");
1044                 # $W->{"r"}->content_languages() ?
1045                 do { header("Content-Language"=>$_) if $_; } for $W->{"language"};
1046                 }
1047         # TODO: Support also: private
1048         header("Cache-Control"=>"public");      # HTTP/1.1
1049
1050         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
1051         my $client_charset=$W->{"force_charset"} || "us-ascii";
1052
1053         # Workaround bug
1054         #   https://bugzilla.mozilla.org/show_bug.cgi?id=120556
1055         # of at least
1056         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1057         my $mime;
1058         # http://validator.w3.org/ does not send ANY "Accept" headers!
1059         $mime||="application/xhtml+xml" if 1
1060                         && !$W->{"headers_in"}{"Accept"}
1061                         && ($W->{"headers_in"}{"User-Agent"}||"")=~m{^W3C_Validator/}i;
1062         $mime||=$class->Negotiate_choose([
1063                         # Put the fallback variant as the first one.
1064                         # Rate both variants the same to prefer "text/html" for undecided clients.
1065                         # At least
1066                         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1067                         # prefers "application/xhtml+xml" over "text/html" itself:
1068                         #   text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
1069                         negotiate_variant(
1070                                         "id"=>"text/html",
1071                                         "content-type"=>"text/html",
1072                                         "qs"=>0.6,
1073                                         "charset"=>$client_charset,
1074                                         "lang"=>$W->{"language"},
1075                                         ),
1076                         negotiate_variant(
1077                                         "id"=>"application/xhtml+xml",
1078                                         "content-type"=>"application/xhtml+xml",
1079                                         "qs"=>0.6,
1080                                         "charset"=>$client_charset,
1081                                         "lang"=>$W->{"language"},
1082                                         ),
1083                         # application/xml ?
1084                         # text/xml ?
1085                         ]);
1086         # mod_perl doc: If you set this header via the headers_out table directly, it
1087         #               will be ignored by Apache. So do not do that.
1088         $W->{"r"}->content_type("$mime; charset=$client_charset");
1089
1090         cache_start();
1091         return if $W->{"header_only"};
1092         # We still can append headers before we put out some text.
1093         # FIXME: It is not clean to still append them without overwriting.
1094         return if $W->{"heading_done"}++;
1095
1096         Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n" if $mime=~m{^application/\w+[+]xml$};
1097         return if $W->{"xml_header_only"};
1098         Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
1099         Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$W->{"language"}.'">'."\n";
1100         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
1101         # Do not: cluck if $title=~/[<>]/;
1102         # as it is not solved just by: &a_href_inhibit
1103         # as sometimes titles use also: <i>...</i>
1104         $title=~s#<[^>]*>##g;
1105         Wprint "<head>";
1106         Wprint "<title>$title</title>\n";
1107         if ($W->{"have_css"}) {
1108                 # Everything can get overriden later.
1109                 for my $css ("/My/Web.css",map((!$_ ? () : ("ARRAY" ne ref($_) ? $_ : @$_)),$W->{"css_push"})) {
1110                         Wprint <<"HERE";
1111 <link rel="stylesheet" type="text/css" href="@{[ uri_escaped(path_web $css) ]}" />
1112 HERE
1113                         }
1114                 if ($W->{"css_inherit"}) {
1115                         Wprint <<"HERE";
1116 <script type="text/javascript" src="@{[ uri_escaped(path_web('/My/css_inherit.js')) ]}" />
1117 HERE
1118                         }
1119                 }
1120         Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
1121         Wprint $W->{"head"};
1122         for my $type (qw(prev next index contents start up)) {
1123                 do { Wprint '<link rel="'.$type.'" href="'.uri_escaped(path_web $_).'" />'."\n" if $_; }
1124                                 for ($W->{"rel_$type"});
1125                 }
1126         Wprint "</head><body";
1127 #       Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
1128 #                       if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
1129         Wprint $W->{"body_attr"};
1130         Wprint ">\n";
1131
1132         do { Wprint $_ if $_; } for $W->{"heading"};
1133 }
1134
1135 BEGIN {
1136         delete $W->{"__My::Web_init"};
1137         }
1138
1139 1;