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}{$target}++;
  71                                 cluck "Appending to the '_done' package list: caller=$caller,target=$target"
  72                                                 if $packages_used_hash{$caller}{"_done"};
  73                                 push @{$packages_used_array{$caller}},$target;
  74                                 }
  75                         }
  76                 eval { CORE::require "$file"; } or confess $@;
  77                 1;      # Otherwise 'require' would already file above.
  78         }
  79
  80         sub Wuse ($@)
  81         {
  82         my($file,@list)=@_;
  83
  84 #               print STDERR "Wuse $file\n";
  85                 Wrequire $file;
  86                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  87                 $file->import(@list);
  88                 1;
  89         }
  90
  91         sub import
  92         {
  93         my($class,@rest)=@_;
  94
  95                 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
  96                 Wrequire("$class");
  97                 return $class->SUPER::import(@rest);
  98         }
  99 }
 100
 101 use WebConfig;  # see also below: Wuse 'WebConfig';
 102 require CGI;
 103 require Image::Size;    # for &imgsize
 104 use File::Basename;     # &basename
 105 use Carp qw(cluck confess);
 106 use URI::Escape;
 107 require HTTP::BrowserDetect;
 108 require HTTP::Negotiate;
 109 our $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
 110 # Do not: use ModPerl::Util qw(exit);
 111 # to prevent in mod_perl2: "exit" is not exported by the ModPerl::Util module
 112 # I do not know why.
 113 use POSIX qw(strftime);
 114 use Tie::Handle;
 115 use Apache2::Const qw(HTTP_MOVED_TEMPORARILY OK HTTP_OK);
 116 use URI;
 117 use URI::QueryParam;
 118 use Cwd;
 119 require HTTP::Date;
 120 require Storable;
 121 require Digest::MD5;
 122 require Data::Compare;
 123 use Data::Dumper;
 124 require Encode;
 125 use Apache2::Filter;
 126 use Apache2::Connection;
 127 require MIME::Base64;
 128 use Apache2::ServerUtil;
 129
 130
 131 #our $W;
 132
 133 sub init ($%)
 134 {
 135 my($class,%args)=@_;
 136
 137         print STDERR "$class->init ".Apache2::RequestUtil->request()->unparsed_uri()."\n";
 138
 139         # We need to track package dependencies, so we need to call it from &init.
 140         # We cannot do it in BEGIN { } block
 141         # as it would not be tracked for each of the toplevel users later.
 142         Wuse 'WebConfig';
 143         Wrequire 'My::Hash';
 144
 145         $W=My::Hash->new({
 146                 "__PACKAGE__"=>scalar(caller()),
 147                 %WebConfig,
 148                 %args,  # override %WebConfig settings
 149                 },"My::Hash::Sub","My::Hash::Push");
 150
 151         # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
 152         # $Apache2::Registry::curstash is no longer supported.
 153         do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
 154
 155         # See: &escapeHTML
 156         do { cluck "charset==$_, expecting ISO-8859-1" if $_ ne "ISO-8859-1"; } for CGI::charset();
 157         CGI::charset("utf-8");
 158
 159         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_ent";
 160         do { $W->{$_}=0  if !defined $W->{$_}; } for "detect_js";
 161         do { $W->{$_}=1  if !defined $W->{$_}; } for "have_css";        # AFAIK it does not hurt anyone.
 162         do { $W->{$_}=0  if !defined $W->{$_}; } for "css_inherit";
 163         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer";
 164         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_delimit";
 165         do { $W->{$_}=1  if !defined $W->{$_}; } for "footer_ids";
 166         do { $W->{$_}=1  if !defined $W->{$_}; } for "indexme";
 167         do { $W->{$_}="" if !defined $W->{$_}; } for "head";
 168         do { $W->{$_}="" if !defined $W->{$_}; } for "body_attr";
 169         do { $W->{$_}="en-US" if !defined $W->{$_}; } for "language";
 170
 171         my $footer_any=0;
 172         for (qw(footer_ids)) {
 173                 $W->{$_}=0 if !$W->{"footer"};
 174                 $footer_any=1 if $W->{$_};
 175                 }
 176         $W->{"footer"}=0 if !$footer_any;
 177         $W->{"footer_delimit"}=0 if !$W->{"footer"};
 178
 179         $W->{"r"}=Apache2::RequestUtil->request();
 180
 181         $W->{"r"}->push_handlers("PerlCleanupHandler"=>\&cleanup);
 182
 183         $W->{"web_hostname"}||=$W->{"r"}->hostname();
 184
 185         tie *STDOUT,$W->{"r"};
 186         select *STDOUT;
 187         $|=1;
 188
 189         $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
 190         if ($W->{"detect_ent"}) {
 191                          if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
 192                         { $W->{"have_ent"}=0; }
 193                 elsif ($W->{"QUERY_STRING"}=~    /[&]have_ent/)
 194                         { $W->{"have_ent"}=1; }
 195                 else
 196                         { delete $W->{"have_ent"}; }
 197                 if (!defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
 198                         $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
 199                                         .escapeHTML("http://".$W->{"web_hostname"}."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
 200                                                         ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
 201                                         .'" />'."\n";
 202                         }
 203                 }
 204         $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
 205         $W->{"r"}->args($W->{"QUERY_STRING"});
 206         # Workaround: &CGI::Vars behaves weird if strings passed both as POST data and in: $QUERY_STRING
 207         do { $W->{"r"}->args(""); delete $ENV{"QUERY_STRING"}; } if $W->{"r"}->method() eq "POST";
 208         # Do not: $W->{"r"}->args()
 209         # as it parses only QUERY_STRING (not POST data).
 210         $W->{"args_orig_array"}=[ CGI->new($W->{"r"})->Vars() ];
 211         $W->{"args"}={ @{$W->{"args_orig_array"}} };
 212         for my $name (keys(%{$W->{"args"}})) {
 213                 my @vals=split /\x00/,$W->{"args"}{$name};
 214                 next if @vals<=1;
 215                 $W->{"args"}{$name}=[@vals];
 216                 }
 217
 218         $W->{"headers_in"}=$W->{"r"}->headers_in();
 219         Wrequire 'My::Hash::Merge';
 220         $W->{"headers_in"}=My::Hash::Merge->new(
 221                         $W->{"headers_in"},
 222                         My::Hash::Sub->new({
 223                                 "_remote_ip"=>sub { return $W->{"r"}->connection()->remote_ip(); },
 224                                 }),
 225                         );
 226         Wrequire 'My::Hash::Readonly';
 227         $W->{"headers_in"}=My::Hash::Readonly->new($W->{"headers_in"});
 228
 229         if ($W->{"r"}->method() eq "GET" || $W->{"r"}->method() eq "HEAD") {
 230                 for (\$W->{"http_safe"}) {
 231                         # Do not: # Extend the current ETag system instead if you would need it:
 232                         #         cluck "Explicitely NOT HTTP-Safe for method \"".$W->{"r"}->method()."\"?!?"
 233                         #                       if defined($$_) && !$$_;
 234                         # as sometimes it just does not make sense to cache it.
 235                         $$_=1 if !defined $$_;
 236                         }
 237                 }
 238         else {
 239                 for (\$W->{"http_safe"}) {
 240                         cluck "Undefined HTTP-Safe-ty for method \"".$W->{"r"}->method()."\"!"
 241                                         if !defined($$_);
 242                         $$_=0 if !defined $$_;
 243                         }
 244                 }
 245         if ($W->{"http_safe"}) {
 246                 Wrequire 'My::Hash::RecordKeys';
 247                 $W->{"headers_in_RecordKeys"}=My::Hash::RecordKeys->new($W->{"headers_in"});
 248                 $W->{"headers_in"}=$W->{"headers_in_RecordKeys"};
 249                 }
 250
 251         $W->{"browser"}=HTTP::BrowserDetect->new($W->{"headers_in"}{"User-Agent"});
 252
 253         if (!defined $W->{"have_style"}) {
 254                 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
 255                 }
 256
 257         $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
 258         if ($W->{"detect_js"} && !$W->{"have_js"}) {
 259                 $W->{"head"}.='<script type="text/javascript" src="'.uri_escaped(path_web('/My/HaveJS.pm')).'"></script>'."\n";
 260                 }
 261
 262         do { _args_check(%$_) if $_; } for ($W->{"args_check"});
 263
 264         return bless $W,$class;
 265 }
 266
 267 sub cleanup($)
 268 {
 269 my($apache_request)=@_;
 270
 271         cluck "CORE::GLOBAL::exit hook not ran" if !$W->{"_exit_ran"};
 272         cluck "packages not finalized" if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
 273         cache_finish();
 274         # Sanity protection.
 275         $W=undef();
 276         return OK;
 277 }
 278
 279 # PerlResponseHandler is RUN_FIRST and &ModPerl::Util::exit returns OK, so no (sane) go.
 280 # PerlLogHandler is already too late to be able to produce any output.
 281 my $exit_orig=\&CORE::GLOBAL::exit;
 282 sub exit_hook
 283 {
 284                 # &footer will call us recursively!
 285                 footer() if !$W->{"_exit_ran"}++;
 286                 return &{$exit_orig}(@_);
 287 }
 288 {
 289         # Prevent: Subroutine CORE::GLOBAL::exit redefined
 290         no warnings 'redefine';
 291         *CORE::GLOBAL::exit=\&exit_hook;
 292         }
 293
 294 # Be aware other parts of code (non-My::Web) will NOT use this function!
 295 # Do not: Wprint $W->{"heading"},"undef"=>1;
 296 # as we would need to undef() it to turn it off and it would get defaulted in such case.
 297 # Do not: exists $W->{"heading"}
 298 # as we use a lot of 'for $W->{"heading"}' which instantiates it with the value: undef()
 299 sub Wprint($%)
 300 {
 301 my($text,%args)=@_;
 302
 303         cluck "undef Wprint" if !defined $text && !$args{"undef"};
 304         delete $args{"undef"};
 305         cluck join(" ","Invalid arguments:",keys(%args)) if keys(%args);
 306         return if !defined $text;
 307         # Do not: cluck "utf-8 untested" if Encode::is_utf8($text);
 308         # as it is valid here.
 309         $W->{"r"}->puts($text);
 310 }
 311
 312 sub request_check(;$)
 313 {
 314 my($self)=@_;
 315
 316         # Use &eval to prevent: Global $r object is not available. Set:\n\tPerlOptions +GlobalRequest\nin ...
 317         # CGI requires valid "r": check it beforehand here.
 318         confess "Calling sensitive dynamic code from a static code" if !eval { Apache2::RequestUtil->request(); };
 319         # Do not: confess "Calling sensitive dynamic code without My::Web::init" if !$W->{"__PACKAGE__"};
 320         # as it is valid at least while preparing arguments to call: &project::Lib::init
 321 }
 322
 323 sub escapeHTML($)
 324 {
 325 my($text)=@_;
 326
 327         # Prevent &CGI::escapeHTML breaking utf-8 strings like: \xC4\x9B eq \x{11B}
 328         # Prevent case if we run under mod_perl but still just initializing:
 329         request_check() if $ENV{"MOD_PERL"};
 330         # Generally we are initialized from &init but we may be used without it without mod_perl
 331         # and in such case check the change on all non-first invocations.
 332         our $init;
 333         if (!$ENV{"MOD_PERL"} && $init++) {
 334                 do { cluck "charset==$_" if $_ ne "utf-8"; } for CGI::charset();
 335                 }
 336         CGI::charset("utf-8");
 337
 338         return CGI::escapeHTML($text);
 339 }
 340
 341 # /home/user/www/webdir
 342 sub dir_top_abs_disk()
 343 {
 344         our $dir_top_abs_disk;
 345         if (!$dir_top_abs_disk) {
 346                 my $selfpkg_relpath=__PACKAGE__;
 347                 $selfpkg_relpath=~s{::}{/}g;
 348                 $selfpkg_relpath.=".pm";
 349                 my $selfpkg_abspath=$INC{$selfpkg_relpath} or do {
 350                         cluck "Unable to find self package $selfpkg_relpath";
 351                         return;
 352                         };
 353                 $selfpkg_abspath=~s{/*\Q$selfpkg_relpath\E$}{} or do {
 354                         cluck "Unable to strip myself \"$selfpkg_relpath\" from the abspath: $selfpkg_abspath";
 355                         return;
 356                         };
 357                 cluck "INC{myself} is relative?: $selfpkg_abspath" if $selfpkg_abspath!~m{^/};
 358                 $dir_top_abs_disk=$selfpkg_abspath;
 359                 }
 360         return $dir_top_abs_disk;
 361 }
 362
 363 sub unparsed_uri()
 364 {
 365         request_check();
 366         if (!$W->{"unparsed_uri"}) {
 367                 # Do not: $W->{"r"}
 368                 # as we may be called before &init from: &My::Project::init
 369                 my $r=Apache2::RequestUtil->request();
 370                 cluck "Calling ".'&unparsed_uri'." from a static code, going to fail" if !$r;
 371                 my $uri_string=$r->unparsed_uri() or cluck "Valid 'r' missing unparsed_uri()?";
 372                 my $uri=URI->new_abs($uri_string,"http://".$W->{"web_hostname"}."/");
 373                 $W->{"unparsed_uri"}=$uri;
 374                 }
 375         return $W->{"unparsed_uri"};
 376 }
 377
 378 sub in_to_uri_abs($)
 379 {
 380 my($in)=@_;
 381
 382         # Otherwise we may have been already processed and thus legally relativized.
 383         # FIXME data: Currently disabled, all the data are too violating such rule.
 384         if (0 && !ref $in) {
 385                 my $uri_check=URI->new($in);
 386                 $uri_check->scheme() || $in=~m{^\Q./\E} || $in=~m{^/}
 387                                 or cluck "Use './' or '/' prefix for all the local references: $in";
 388                 }
 389         my $uri=URI->new_abs($in,unparsed_uri());
 390         $uri=$uri->canonical();
 391         return $uri;
 392 }
 393
 394 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 395 # $args{"abs"}=1;
 396 sub path_web($%)
 397 {
 398 my($in,%args)=@_;
 399
 400         cluck if !$args{"uri_as_in"} && ref $in;
 401         my $uri=in_to_uri_abs($in);
 402         if (uri_is_local($uri)) {
 403                 # Prefer the $uri values over "args_persistent" values.
 404                 $uri->query_form_hash({
 405                                 map({
 406                                         my $key=$_;
 407                                         my $val=$W->{"args"}{$key};
 408                                         (!defined $val ? () : ($key=>$val));
 409                                         } keys(%{$W->{"args_persistent"}})),
 410                                 %{$uri->query_form_hash()},
 411                                 });
 412                 }
 413         return $uri->abs(unparsed_uri()) if $W->{"args"}{"Wabs"} || $args{"abs"};
 414         return $uri->rel(unparsed_uri());
 415 }
 416
 417 sub path_abs_disk_register($)
 418 {
 419 my($path_abs_disk)=@_;
 420
 421         $W->{"path_abs_disk_register"}{$path_abs_disk}=1;
 422 }
 423
 424 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
 425 sub path_abs_disk($%)
 426 {
 427 my($in,%args)=@_;
 428
 429         cluck if !$args{"uri_as_in"} && ref $in;
 430         my $uri=in_to_uri_abs($in);
 431         cluck if !uri_is_local($uri);
 432         my $path=$uri->path();
 433         cluck "URI compatibility: ->path() not w/leading slash of URI \"$uri\"; path: $path" if $path!~m{^/};
 434         my $r=dir_top_abs_disk().$path;
 435         path_abs_disk_register $r if !defined $args{"register"} || $args{"register"};
 436         return $r;
 437 }
 438
 439 sub fatal (;$);
 440
 441 sub _args_check (%)
 442 {
 443 my(%tmpl)=@_;
 444
 445         while (my($name,$regex)=each(%tmpl)) {
 446                 my $name_html="Parameter <span class=\"quote\">".escapeHTML($name)."</span>";
 447                 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
 448                 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
 449                 fatal "$name_html passed as multivar although singlevar expected"
 450                                 if ref $W->{"args"}{$name} && !ref $regex;
 451                 $regex=$regex->[0] if ref $regex;
 452                 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
 453                         $val="" if !defined $val;
 454                         fatal "$name_html <span class=\"quote\">".escapeHTML($val)."</span>"
 455                                                         ." does not match the required regex <span class=\"quote\">".escapeHTML($regex)."</span> "
 456                                         if $regex ne "" && $val!~/$regex/;
 457                         }
 458                 }
 459 }
 460
 461 sub vskip (;$)
 462 {
 463 my($height)=@_;
 464
 465         return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'>&nbsp;</p>'."\n";
 466 }
 467
 468 sub fatal (;$)
 469 {
 470 my($msg)=@_;
 471
 472         $msg="UNKNOWN" if !$msg;
 473         cluck "FATAL: $msg";
 474
 475         # Do not send it unconditionally.
 476         # The intial duplicated '<?xml...' crashes Gecko parser.
 477         $W->{"heading_done"}=0 if $W->{"header_only"};
 478         # Do not send it unconditionally.
 479         # Prevents warn: Headers already sent
 480         if (!$W->{"heading_done"}) {
 481                 $W->{"indexme"}=0;      # For the case no heading was sent yet.
 482                 $W->{"header_only"}=0;  # assurance for &heading
 483                 My::Web->heading();
 484                 }
 485         Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
 486                         ."<p>You can report this problem's details to"
 487                         ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
 488         exit;
 489 }
 490
 491 sub footer()
 492 {
 493         cluck 'Explicit &footer call is deprecated' if !$W->{"_exit_ran"};
 494         exit if $W->{"footer_passed"}++;        # deadlock prevention:
 495         if ($W->{"header_only"}) {
 496                 $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
 497                 exit;
 498                 }
 499
 500         Wprint vskip if $W->{"footer_delimit"};
 501         &{$_}() for reverse @{$W->{"footing_delimit_sub_push"}};
 502         Wprint "<hr />\n" if $W->{"footer"};
 503
 504         # Never update the package list while we examine it!
 505         $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
 506
 507         my $packages_used=$packages_used_array{$W->{"__PACKAGE__"}};
 508         if ($W->{"footer_ids"}) {
 509                 Wprint '<p class="cvs-id">';
 510                 Wprint join("<br />\n",map({ my $package=$_;
 511                         my $cvs_id=(eval('$'.$package."::CVS_ID")
 512 #                                       || $package     # debug
 513                                         );
 514                         if (!$cvs_id) {
 515                                 ();
 516                                 }
 517                         else {
 518                                 $cvs_id='$'.$cvs_id.'$';        # Eaten by 'q' operator.
 519                                 my @cvs_id_split=split / +/,$cvs_id;
 520                                 if (@cvs_id_split==8) {
 521                                         my $file=$package;
 522                                         $file=~s#::#/#g;
 523                                         my $ext;
 524                                         my @tried;
 525                                         for (qw(.pm)) {
 526                                                 $ext=$_;
 527                                                 my $path_abs_disk=path_abs_disk("/$file$ext");
 528                                                 push @tried,$path_abs_disk;
 529                                                 last if -r $path_abs_disk;
 530                                                 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
 531                                                 }
 532                                         $file.=$ext;
 533                                         $cvs_id_split[2]=""
 534                                                         .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
 535                                                                         $cvs_id_split[2]);
 536                                         $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
 537                                                         ($package!~/^Apache2::/ ? $package : $cvs_id_split[1]));
 538                                         $cvs_id_split[5]=&{$W->{"cvs_id_author_sub"}}($cvs_id_split[5]);
 539                                         }
 540                                 join " ",@cvs_id_split;
 541                                 }
 542                         } @$packages_used));
 543                 Wprint "</p>\n";
 544                 }
 545
 546         for my $package (@$packages_used) {
 547                 my $cvs_id=(eval('$'.$package."::CVS_ID")
 548 #                               || $package     # debug
 549                                 );
 550                 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
 551                 }
 552
 553         do { Wprint $_ if $_; } for $W->{"footing"};
 554
 555         Wprint "</body></html>\n";
 556         exit;
 557 }
 558
 559 # Existing entries are overwritten.
 560 sub header(%)
 561 {
 562 my(%pairs)=@_;
 563
 564         while (my($key,$val)=each(%pairs)) {
 565                 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
 566                 $W->{"r"}->headers_out()->set($key,$val);
 567                 }
 568 }
 569
 570 sub size_display ($)
 571 {
 572 my($size)=@_;
 573
 574            if ($size<4096)
 575                 {}
 576         elsif ($size<1024*1024)
 577                 { $size=sprintf "%.1fK",$size/1024; }
 578         else
 579                 { $size=sprintf "%.1fM",$size/1024/1024; }
 580         $size.="B";
 581         return $size;
 582 }
 583
 584 sub uri_is_local($)
 585 {
 586 my($in)=@_;
 587
 588         my $uri_rel=in_to_uri_abs($in)->rel(unparsed_uri());
 589         # Do not: defined $uri_rel->("userinfo"|"host"|"port")();
 590         # as they fail to be called for schemes not supporting them.
 591         return 0 if $uri_rel->scheme();
 592         return 0 if $uri_rel->authority();
 593         return 1;
 594 }
 595
 596 # &path_web still may be required for &uri_escaped !
 597 sub uri_escaped($)
 598 {
 599 my($uri)=@_;
 600
 601         cluck if !ref $uri;
 602         my $urient=escapeHTML($uri);
 603         return $uri    if $uri eq $urient;
 604         request_check();
 605         return $urient if uri_is_local $uri;
 606         return $uri    if defined $W->{"have_ent"} && !$W->{"have_ent"};        # non-ent client
 607         return $urient if $W->{"have_ent"};     # ent client
 608         # Unknown client, &escapeHTML should not be needed here:
 609         return escapeHTML(path_web('/My/Redirect.pm?location='.uri_escape($uri->abs(unparsed_uri()))));
 610 }
 611
 612 our $a_href_inhibited;
 613 sub a_href($;$%)
 614 {
 615 my($in,$contents,%args)=@_;
 616
 617         request_check();
 618         do { $$_=1 if !defined $$_; } for (\$args{"size"});
 619         if (!defined $contents) {
 620                 $contents=$in;
 621                 $contents=File::Basename::basename($contents) if $args{"basename"};
 622                 $contents=escapeHTML($contents);
 623                 }
 624         $contents=~s#<a\b[^>]*>##gi;
 625         $contents=~s#</a>##gi;
 626         return $contents if $a_href_inhibited;
 627
 628         my $path_web=path_web $in,%args;
 629         my $r="";
 630         $r.='<a href="';
 631         $r.=uri_escaped $path_web;
 632         $r.='"';
 633         do { $r.=" $_" if $_; } for ($args{"attr"});
 634         $r.='>'.$contents.'</a>';
 635         if ($args{"size"} && uri_is_local($in) && ($args{"size"}>=2 || $in=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) {   # Downloadable?
 636                 my $path_abs_disk=path_abs_disk $in,%args;
 637                 cluck "File not readable: $path_abs_disk" if !-r $path_abs_disk;
 638                 $r.='&nbsp;('.size_display((stat($path_abs_disk))[7]).')';
 639                 }
 640         return $r;
 641 }
 642
 643 sub a_href_inhibit($$;@)
 644 {
 645 my($self,$sub,@sub_args)=@_;
 646
 647         local $a_href_inhibited=1;
 648         return &{$sub}(@sub_args);
 649 }
 650
 651 sub input_hidden_persistents()
 652 {
 653         request_check();
 654         return join("",map({
 655                 my $key=$_;
 656                 my $val=$W->{"args"}{$key};
 657                 (!defined $val ? () : '<input type="hidden"'
 658                                 .' name="'.escapeHTML($key).'"'
 659                                 .' value="'.escapeHTML($val).'"'
 660                                 .' />'."\n");
 661                 } (keys(%{$W->{"args_persistent"}}))));
 662 }
 663
 664 sub http_moved($$;$)
 665 {
 666 my($self,$url,$status)=@_;
 667
 668         $url=path_web($url,"abs"=>1);
 669         $status||=HTTP_MOVED_TEMPORARILY;
 670         $W->{"r"}->status($status);
 671         $W->{"r"}->headers_out()->{"Location"}=$url;
 672         $W->{"header_only"}=1;
 673         My::Web->heading();
 674         exit;
 675         die "NOTREACHED";
 676 }
 677
 678 sub remote_ip ()
 679 {
 680         # Do not: PerlModule                 Apache2::ForwardedFor
 681         #         PerlPostReadRequestHandler Apache2::ForwardedFor
 682         # As 'Apache2::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
 683         # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
 684         # We must take the last item ourselves.
 685         # Be VERY sure you always retrieve all the headers unconditionally to hit: My::Hash::RecordKeys
 686         my $x_forwarded_for=$W->{"headers_in"}{"X-Forwarded-For"};
 687         $x_forwarded_for=~s/^.*,\s*// if $x_forwarded_for;
 688         my $remote_ip=$W->{"headers_in"}{"_remote_ip"};
 689         my $r;
 690         $r||=$x_forwarded_for;
 691         $r||=$remote_ip;
 692         return $r;
 693 }
 694
 695 # $url={"JP"=>"http://specific",...};
 696 # $url={""=>"http://default",...};
 697 sub a_href_cc($$;%)
 698 {
 699 my($url,$contents,%args)=@_;
 700
 701         # A bit ineffective but we must process all the possibilities to get stable 'headers_in' hits!
 702         my %map=map(($_=>a_href($url->{$_},$contents,%args)),keys(%$url));
 703         my $cc;
 704         $cc||=Geo::IP->new()->country_code_by_addr(remote_ip()) if $have_Geo_IP;
 705         $cc||="";
 706         my $r=$map{$cc};
 707         return $r if $r;
 708         return $contents;
 709 }
 710
 711 sub make ($)
 712 {
 713 my($cmd)=@_;
 714
 715         # FIXME: &alarm, --timeout is now infinite.
 716         # FIXME: Try to remove bash(1).
 717         # FIXME: Use: @PATH_FLOCK@
 718         my @argv=('flock',dir_top_abs_disk(),'bash','-c',$cmd.' >&2');
 719         print STDERR join(" ","SPAWN:",@argv)."\n";
 720         system @argv;
 721 }
 722
 723 sub make_file($$)
 724 {
 725 my($self,$file)=@_;
 726
 727         cluck "Pathname not absolute: $file" if $file!~m{^/};
 728         return if -f $file;
 729         # TODO: Somehow quickly check dependencies?
 730         return make('make -s --no-print-directory'
 731                                         .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'");
 732 }
 733
 734 sub img_size ($$)
 735 {
 736 my($width,$height)=@_;
 737
 738         cluck if !defined $width || !defined $height;
 739         return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
 740                         ." width=\"$width\" height=\"$height\"";
 741 }
 742
 743 sub negotiate_variant (%)
 744 {
 745 my(%args)=@_;
 746
 747         my @fields=("id","qs","content-type","encoding","charset","lang","size");
 748         return [ map(($args{$_}),@fields) ];
 749 }
 750
 751 # Input: $self is required!
 752 # Input: Put the fallback variant as the first one.
 753 # Returns: always only scalar!
 754 sub Negotiate_choose($$)
 755 {
 756 my($self,$variants)=@_;
 757
 758         # Limit these entries to generate proper 'Vary' header.
 759         my %hash=(map(($_=>$W->{"headers_in"}{$_}),qw(
 760                         Accept
 761                         Accept-Charset
 762                         Accept-Encoding
 763                         Accept-Language
 764                         )));
 765         my $best=HTTP::Negotiate::choose($variants,
 766                         # Do not: $W->{"r"}
 767                         # to prevent: Can't locate object method "scan" via package "Apache2::RequestRec" at HTTP/Negotiate.pm line 84.
 768                         # Do not: $W->{"r"}->headers_in()
 769                         # to prevent: Can't locate object method "scan" via package "APR::Table" at HTTP/Negotiate.pm line 84.
 770                         # Do not: HTTP::Headers->new($W->{"r"}->headers_in());
 771                         # to prevent empty result or even: Odd number of elements in anonymous hash
 772                         HTTP::Headers->new(%hash));
 773         $best||=$variants->[0][0];      # $variants->[0]{"id"}; &HTTP::Negotiate::choose failed?
 774         return $best;
 775 }
 776
 777 my @img_variants=(
 778                 { "id"=>"png","qs"=>0.9,"content-type"=>"image/png" },
 779                 { "id"=>"gif","qs"=>0.7,"content-type"=>"image/gif" },
 780                 );
 781 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 782
 783 # Returns: ($path_web,$path_abs_disk)
 784 # URI path segments support ignored here. Where it is used? (';' path segment options)
 785 sub _img_src($%)
 786 {
 787 my($in,%args)=@_;
 788
 789         cluck if !uri_is_local $in;
 790         my $uri=in_to_uri_abs $in;
 791         my $path_abs_disk=path_abs_disk $uri,%args,"uri_as_in"=>1,"register"=>0;
 792
 793         # Known image extension?
 794         return path_web($uri,%args,"uri_as_in"=>1),$path_abs_disk if $uri->path()=~m#$img_variants_re#o;
 795
 796         my @nego_variants;
 797         for my $var (@img_variants) {
 798                 my $path_abs_disk_variant=$path_abs_disk.".".$var->{"id"};
 799                 path_abs_disk_register($path_abs_disk_variant);
 800                 __PACKAGE__->make_file($path_abs_disk_variant);
 801                 push @nego_variants,negotiate_variant(
 802                                 %$var,
 803                                 "size"=>(stat $path_abs_disk_variant)[7],
 804                                 );
 805                 }
 806         my $ext=__PACKAGE__->Negotiate_choose(\@nego_variants);
 807
 808         $uri->path($uri->path().".$ext");
 809         return path_web($uri,%args,"uri_as_in"=>1),path_abs_disk($uri,%args,"uri_as_in"=>1);
 810 }
 811
 812 # $args{"attr"}
 813 sub img ($$%)
 814 {
 815 my($in,$alt,%args)=@_;
 816
 817         request_check();
 818         my($path_web,$path_abs_disk)=_img_src($in,%args);
 819         my($width,$height)=Image::Size::imgsize($path_abs_disk);
 820         $alt=~s/<[^>]*>//g;
 821         $alt=escapeHTML($alt);
 822         my $content="<img src=\"".uri_escaped($path_web)."\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
 823                         .(!$args{"attr"} ? "" : " ".$args{"attr"})." />";
 824         do { return a_href((_img_src($_))[0],$content,"uri_as_in"=>1) if $_; } for $args{"a_href_img"};
 825         do { return a_href $_,$content if $_; } for $args{"a_href"};
 826         return $content;
 827 }
 828
 829 sub centerimg
 830 {
 831         my $r="";
 832         $r.='<table border="0" width="100%"><tr>'."\n";
 833         @_=( [@_] ) if !ref $_[0];
 834         for (@_) {
 835                 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
 836                 }
 837         $r.='</tr></table>'."\n";
 838         return $r;
 839 }
 840
 841 sub rightimg
 842 {
 843 my($text,@args_img)=@_;
 844
 845         # FIXME: Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
 846         #        <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
 847         #        <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
 848         # causes whole invisible projects in: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Galeon/1.3.21
 849         return <<"HERE";
 850 <table border="0" width="100%">
 851         <tr>
 852                 <td align="left">
 853                         @{[ $text ]}
 854                 </td>
 855                 <td align="right">
 856                         @{[ &{\&img}(@args_img) ]}
 857                 </td>
 858         </tr>
 859 </table>
 860 HERE
 861 }
 862
 863 sub readfile($$)
 864 {
 865 my($class,$filename)=@_;
 866
 867         local *F;
 868         open F,$filename or cluck "Cannot open \"$filename\": $!";
 869         my $F=do { local $/=undef(); <F>; };
 870         close F or cluck "Cannot close \"$filename\": $!";
 871         return $F;
 872 }
 873
 874 sub _no_cache($)
 875 {
 876 my($self)=@_;
 877
 878         header("Expires"=>HTTP::Date::time2str(1000000000));    # date in the past
 879         header("Last-Modified"=>HTTP::Date::time2str());        # always modified
 880         header("Cache-Control"=>join(", ",
 881                         "no-cache",
 882                         "no-store",
 883                         "must-revalidate",
 884                         "max-age=0",
 885                         "pre-check=0",  # MSIE
 886                         "post-check=0", # MSIE
 887                         ));     # HTTP/1.1
 888         header("Pragma"=>"no-cache");   # HTTP/1.0
 889         header("Vary"=>"*");    # content may ba based on unpredictable sources
 890 }
 891
 892 sub headers_in_filtered(@)
 893 {
 894 my(@keys)=@_;
 895
 896         return map(($_=>$W->{"headers_in"}{$_}),@keys);
 897 }
 898
 899 our %uri_args_frozen_to_headers_in_keys;
 900 our %uri_args_headers_in_frozen_to_headers_out;
 901
 902 sub uri_args_headers_in_frozen_get($)
 903 {
 904 my($headers_in_keys_arrayref)=@_;
 905
 906         my %uri_args_headers_in_hash=(
 907                 "uri_args_frozen"=>$W->{"uri_args_frozen"},
 908                 "headers_in"=>{ headers_in_filtered(@$headers_in_keys_arrayref) },
 909                 );
 910         return do { local $Storable::canonical=1; Storable::freeze(\%uri_args_headers_in_hash); };
 911 }
 912
 913 sub cache_output_filter($)
 914 {
 915 my($f)=@_;
 916
 917         while ($f->read(my $text,0x400)) {
 918                 cluck "utf-8 untested" if Encode::is_utf8($text);       # Possible here at all?
 919                 $f->print($text);
 920                 $W->{"digest-md5"}->add($text);
 921                 }
 922         return OK;
 923 }
 924
 925 sub cache_start()
 926 {
 927         if (!$W->{"http_safe"}) {
 928                 __PACKAGE__->_no_cache();
 929                 return;
 930                 }
 931
 932         {
 933                 # &Wrequire it here even if it will not be later used; to be stable!
 934                 Wrequire 'My::Hash::RestrictTo';
 935                 my %uri_args_hash=(
 936                         "uri"=>"http://".$W->{"web_hostname"}."/".$W->{"r"}->uri(),
 937                         "args"=>$W->{"args_orig_array"},
 938                         );
 939                 $W->{"uri_args_frozen"}=do { local $Storable::canonical=1; Storable::freeze(\%uri_args_hash); };
 940                 last if !(my $headers_in_keys_arrayref=$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}});
 941
 942                 # Protection to be sure we are stable:
 943                 $W->{"headers_in"}=My::Hash::RestrictTo->new($W->{"headers_in"},@$headers_in_keys_arrayref);
 944
 945                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get($headers_in_keys_arrayref);
 946                 last if !(my $headers_out_hashref=$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}});
 947                 header(%$headers_out_hashref);
 948                 my $status;
 949                 {
 950                         # &meets_conditions will always deny the attempt if !2xx status().
 951                         # At least ap_read_request() sets: r->status=HTTP_REQUEST_TIME_OUT;     /* Until we get a request */
 952                         my $status_old=$W->{"r"}->status();
 953                         $W->{"r"}->status(HTTP_OK);
 954                         # Update httpd's 'r->mtime' as the header "Last-Modified" is just not enough for ap_meets_conditions():
 955                         # &update_mtime() argument is really in _secs_, not in _msecs_ as the docs claim.
 956                         # Be aware '*1000000' would overflow Perl integer anyway.
 957                         # &set_last_modified would also override the "Last-Modified" headers_out!
 958                         # &mtime may exist but somehow does not work.
 959                         $W->{"r"}->update_mtime(HTTP::Date::str2time($headers_out_hashref->{"Last-Modified"}));
 960                         $status=$W->{"r"}->meets_conditions();
 961                         $W->{"r"}->status($status_old);
 962                         }
 963                 last if OK==$status;
 964                 $W->{"r"}->status($status);
 965                 $W->{"header_only"}=1;  # Inhibit &footer output.
 966                 exit;
 967                 die "NOTREACHED";
 968                 }
 969
 970         $W->{"digest-md5"}=Digest::MD5->new();
 971         $W->{"cache_active"}=1;
 972         $W->{"r"}->add_output_filter(\&cache_output_filter);
 973 }
 974
 975 sub cache_finish_last_modified()
 976 {
 977         cluck "Not yet done now? W __PACKAGE__: ".$W->{"__PACKAGE__"}
 978                         if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
 979         for my $package_orig (@{$packages_used_array{$W->{"__PACKAGE__"}}}) {
 980                 local $_=$package_orig.".pm";
 981                 s{::}{/}g;
 982                 path_abs_disk "/$_","register"=>1;
 983                 }
 984         my $mtime_newest;
 985         for my $path_abs_disk (keys(%{$W->{"path_abs_disk_register"}})) {
 986                 my $mtime=(stat $path_abs_disk)[9];
 987                 do { cluck "No mtime for: $path_abs_disk"; next; } if !$mtime;
 988                 $mtime_newest=$mtime if !$mtime_newest || $mtime_newest<$mtime;
 989                 }
 990         cluck "No mtime_newest found for the current W __PACKAGE__: ".$W->{"__PACKAGE__"}
 991                         if !$mtime_newest;
 992         return HTTP::Date::time2str($mtime_newest);
 993 }
 994
 995
 996 sub cache_finish()
 997 {
 998         # Do not: return if !$W->{"uri_args_frozen"};
 999         # as we may have just gave 304 and 'exit;' without starting the caching.
1000         return if !$W->{"cache_active"};
1001
1002         # Fill-in/check: %uri_args_frozen_to_headers_in_keys
1003         my $headers_in_keys_stored_arrayref_ref=\$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}};
1004         my @headers_in_keys=tied(%{$W->{"headers_in_RecordKeys"}})->accessed();
1005         if (!$$headers_in_keys_stored_arrayref_ref
1006                         || !Data::Compare::Compare(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)) {
1007                 cluck "Non-matching generated 'headers_in_keys' per 'uri_args_frozen' key:\n"
1008                                                 .Dumper(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)
1009                                 if $$headers_in_keys_stored_arrayref_ref;
1010                 # Build or possibly prevent such further warn dupes:
1011                 $$headers_in_keys_stored_arrayref_ref=\@headers_in_keys;
1012                 # Build or regenerate as obsoleted now:
1013                 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get(\@headers_in_keys);
1014                 }
1015
1016         # Prepare 'headers_out' for the future reusal:
1017         my %headers_out;
1018         # Do not: $W->{"digest-md5"}->b64digest();
1019         # as it will not provide the trailing filling '='s.
1020         # RFC 1864 is not clear if they should be there but its sample provides them.
1021         # Do not try to provide canonical "\r\n" form of newlines as is said by RFC 1864.
1022         # RFC 2068 (HTTP/1.1) section 14.16 says the newlines should NOT be converted for HTTP.
1023         # ',""' to avoid breaking the headers by its default "\n".
1024         $headers_out{"Content-MD5"}=MIME::Base64::encode_base64($W->{"digest-md5"}->digest(),"");
1025         # In fact we could also use MD5 for ETag as if we know ETag we also know MD5.
1026         # But this way we do not need to calculate MD5 and we still can provide such ETag. So.
1027         # $W->{"r"}->set_etag() ?
1028         $headers_out{"ETag"}='"'.Digest::MD5::md5_base64($W->{"uri_args_headers_in_frozen"}).'"';
1029         # $W->{"r"}->set_content_length() ?
1030         $headers_out{"Content-Length"}=$W->{"r"}->bytes_sent();
1031         my %Vary=map(($_=>1),(@headers_in_keys));
1032         for (keys(%Vary)) {
1033                 next if !/^_/;
1034                 $Vary{"*"}=1;
1035                 delete $Vary{$_};
1036                 }
1037         %Vary=("*"=>1) if $Vary{"*"};
1038         $headers_out{"Vary"}=join(", ",sort keys(%Vary));
1039         # $W->{"r"}->set_last_modified() ?
1040         $headers_out{"Last-Modified"}=cache_finish_last_modified();
1041
1042         # Fill-in/check: %uri_args_headers_in_frozen_to_headers_out
1043         my $headers_out_stored_hashref_ref=\$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}};
1044         if (!$$headers_out_stored_hashref_ref
1045                         || !Data::Compare::Compare(\%headers_out,$$headers_out_stored_hashref_ref)) {
1046                 cluck "Non-matching generated 'headers_out' per 'uri_args_headers_in_frozen' key:\n"
1047                                                 .Dumper(\%headers_out,$$headers_out_stored_hashref_ref)
1048                                 if $$headers_out_stored_hashref_ref;
1049                 # Build or possibly prevent such further warn dupes:
1050                 $$headers_out_stored_hashref_ref=\%headers_out;
1051                 }
1052
1053 ###print STDERR Dumper(\%uri_args_frozen_to_headers_in_keys,\%uri_args_headers_in_frozen_to_headers_out);
1054 }
1055
1056 sub heading()
1057 {
1058 my($class)=@_;
1059
1060         if (!$W->{"header_only"}) {
1061                 header("Content-Style-Type"=>"text/css");
1062                 header("Content-Script-Type"=>"text/javascript");
1063                 # $W->{"r"}->content_languages() ?
1064                 do { header("Content-Language"=>$_) if $_; } for $W->{"language"};
1065                 }
1066         # TODO: Support also: private
1067         header("Cache-Control"=>"public");      # HTTP/1.1
1068
1069         # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
1070         my $client_charset=$W->{"force_charset"} || "us-ascii";
1071
1072         # Workaround bug
1073         #   https://bugzilla.mozilla.org/show_bug.cgi?id=120556
1074         # of at least
1075         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1076         my $mime;
1077         # http://validator.w3.org/ does not send ANY "Accept" headers!
1078         $mime||="application/xhtml+xml" if 1
1079                         && !$W->{"headers_in"}{"Accept"}
1080                         && ($W->{"headers_in"}{"User-Agent"}||"")=~m{^W3C_Validator/}i;
1081         $mime||=$class->Negotiate_choose([
1082                         # Put the fallback variant as the first one.
1083                         # Rate both variants the same to prefer "text/html" for undecided clients.
1084                         # At least
1085                         #   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1086                         # prefers "application/xhtml+xml" over "text/html" itself:
1087                         #   text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
1088                         negotiate_variant(
1089                                         "id"=>"text/html",
1090                                         "content-type"=>"text/html",
1091                                         "qs"=>0.6,
1092                                         "charset"=>$client_charset,
1093                                         "lang"=>$W->{"language"},
1094                                         ),
1095                         negotiate_variant(
1096                                         "id"=>"application/xhtml+xml",
1097                                         "content-type"=>"application/xhtml+xml",
1098                                         "qs"=>0.6,
1099                                         "charset"=>$client_charset,
1100                                         "lang"=>$W->{"language"},
1101                                         ),
1102                         # application/xml ?
1103                         # text/xml ?
1104                         ]);
1105         # mod_perl doc: If you set this header via the headers_out table directly, it
1106         #               will be ignored by Apache. So do not do that.
1107         $W->{"r"}->content_type("$mime; charset=$client_charset");
1108
1109         cache_start();
1110         return if $W->{"header_only"};
1111         # We still can append headers before we put out some text.
1112         # FIXME: It is not clean to still append them without overwriting.
1113         return if $W->{"heading_done"}++;
1114
1115         Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n" if $mime=~m{^application/\w+[+]xml$};
1116         return if $W->{"xml_header_only"};
1117         Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
1118         Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$W->{"language"}.'">'."\n";
1119         my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
1120         # Do not: cluck if $title=~/[<>]/;
1121         # as it is not solved just by: &a_href_inhibit
1122         # as sometimes titles use also: <i>...</i>
1123         $title=~s#<[^>]*>##g;
1124         Wprint "<head>";
1125         Wprint "<title>$title</title>\n";
1126         if ($W->{"have_css"}) {
1127                 # Everything can get overriden later.
1128                 for my $css ("/My/Web.css",@{$W->{"css_push"}}) {
1129                         Wprint <<"HERE";
1130 <link rel="stylesheet" type="text/css" href="@{[ uri_escaped(path_web $css) ]}" />
1131 HERE
1132                         }
1133                 if ($W->{"css_inherit"}) {
1134                         Wprint <<"HERE";
1135 <script type="text/javascript" src="@{[ uri_escaped(path_web('/My/css_inherit.js')) ]}" />
1136 HERE
1137                         }
1138                 }
1139         Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
1140         Wprint $W->{"head"};
1141         for my $type (qw(prev next index contents start up)) {
1142                 do { Wprint '<link rel="'.$type.'" href="'.uri_escaped(path_web $_).'" />'."\n" if $_; }
1143                                 for ($W->{"rel_$type"});
1144                 }
1145         Wprint "</head><body";
1146 #       Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
1147 #                       if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
1148         Wprint $W->{"body_attr"};
1149         Wprint ">\n";
1150
1151         do { Wprint $_ if $_; } for $W->{"heading"};
1152 }
1153
1154 BEGIN {
1155         delete $W->{"__My::Web_init"};
1156         }
1157
1158 1;