2 # Common functions for HTML/XHTML output generation
3 # Copyright (C) 2003-2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
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
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.
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
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; };
32 &path_web &path_abs_disk
36 &img ¢erimg &rightimg
38 &input_hidden_persistents
41 our @ISA=qw(Tie::Handle Exporter);
43 my %packages_used_hash; # $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
44 my %packages_used_array;
48 use Carp qw(cluck confess);
49 $W->{"__My::Web_init"}=1;
55 # print STDERR "Wrequire $file\n";
62 for (my $depth=0;defined caller($depth);$depth++) {
63 $callers{caller($depth)}=1;
65 my $selfpkg=__PACKAGE__;
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;
74 eval { CORE::require "$file"; } or confess $@;
75 1; # Otherwise 'require' would already file above.
82 # print STDERR "Wuse $file\n";
84 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
93 local $Exporter::ExportLevel=$Exporter::ExportLevel+1;
95 return $class->SUPER::import(@rest);
99 use WebConfig; # see also below: Wuse 'WebConfig';
101 require Image::Size; # for &imgsize
102 use File::Basename; # &basename
103 use Carp qw(cluck confess);
105 require HTTP::BrowserDetect;
106 require HTTP::Negotiate;
107 our $have_Geo_IP; BEGIN { $have_Geo_IP=eval { require Geo::IP; 1; }; }
108 # Do not: use ModPerl::Util qw(exit);
109 # to prevent in mod_perl2: "exit" is not exported by the ModPerl::Util module
111 use POSIX qw(strftime);
113 use Apache2::Const qw(HTTP_MOVED_TEMPORARILY OK HTTP_OK);
120 require Data::Compare;
124 use Apache2::Connection;
125 require MIME::Base64;
132 my($apache_request)=@_;
134 $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
141 sub request_check(;$)
145 # Use &eval to prevent: Global $r object is not available. Set:\n\tPerlOptions +GlobalRequest\nin ...
146 # CGI requires valid "r": check it beforehand here.
147 confess "Calling sensitive dynamic code from a static code" if !eval { Apache2::RequestUtil->request(); };
148 # Do not: confess "Calling sensitive dynamic code without My::Web::init" if !$W->{"__PACKAGE__"};
149 # as it is valid at least while preparing arguments to call: &project::Lib::init
156 print STDERR "$class->init ".Apache2::RequestUtil->request()->unparsed_uri()."\n";
158 # We need to track package dependencies, so we need to call it from &init.
159 # We cannot do it in BEGIN { } block
160 # as it would not be tracked for each of the toplevel users later.
165 "__PACKAGE__"=>scalar(caller()),
167 %args, # override %WebConfig settings
168 },"My::Hash::Sub","My::Hash::Push");
170 # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
171 # $Apache2::Registry::curstash is no longer supported.
172 do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
175 do { cluck "charset==$_, expecting ISO-8859-1" if $_ ne "ISO-8859-1"; } for CGI::charset();
176 CGI::charset("utf-8");
178 do { $W->{$_}=0 if !defined $W->{$_}; } for "detect_ent";
179 do { $W->{$_}=0 if !defined $W->{$_}; } for "detect_js";
180 do { $W->{$_}=1 if !defined $W->{$_}; } for "have_css"; # AFAIK it does not hurt anyone.
181 do { $W->{$_}=0 if !defined $W->{$_}; } for "css_inherit";
182 do { $W->{$_}=1 if !defined $W->{$_}; } for "footer";
183 do { $W->{$_}=1 if !defined $W->{$_}; } for "footer_delimit";
184 do { $W->{$_}=1 if !defined $W->{$_}; } for "footer_ids";
185 do { $W->{$_}=1 if !defined $W->{$_}; } for "indexme";
186 do { $W->{$_}="" if !defined $W->{$_}; } for "head";
187 do { $W->{$_}="" if !defined $W->{$_}; } for "body_attr";
188 do { $W->{$_}="en-US" if !defined $W->{$_}; } for "language";
191 for (qw(footer_ids)) {
192 $W->{$_}=0 if !$W->{"footer"};
193 $footer_any=1 if $W->{$_};
195 $W->{"footer"}=0 if !$footer_any;
196 $W->{"footer_delimit"}=0 if !$W->{"footer"};
198 $W->{"r"}=Apache2::RequestUtil->request();
200 $W->{"r"}->push_handlers("PerlCleanupHandler"=>\&cleanup);
202 $W->{"web_hostname"}||=$W->{"r"}->hostname();
204 tie *STDOUT,$W->{"r"};
208 $W->{"QUERY_STRING"}=$W->{"r"}->args() || "";
209 if ($W->{"detect_ent"}) {
210 if ($W->{"QUERY_STRING"}=~/[&]amp;have_ent/)
211 { $W->{"have_ent"}=0; }
212 elsif ($W->{"QUERY_STRING"}=~ /[&]have_ent/)
213 { $W->{"have_ent"}=1; }
215 { delete $W->{"have_ent"}; }
216 if (!defined $W->{"have_ent"} && $W->{"r"}->method() eq "GET") {
217 $W->{"head"}.='<meta http-equiv="Refresh" content="0; URL='
218 .escapeHTML("http://".$W->{"web_hostname"}."/".($W->{"r"}->uri()=~m#^/*(.*)$#)[0]
219 ."?".($W->{"QUERY_STRING"} || "detect_ent_glue=1").'&have_ent=detect')
223 $W->{"QUERY_STRING"}=~s/([&])amp;/$1/g;
224 $W->{"r"}->args($W->{"QUERY_STRING"});
225 # Workaround: &CGI::Vars behaves weird if strings passed both as POST data and in: $QUERY_STRING
226 do { $W->{"r"}->args(""); delete $ENV{"QUERY_STRING"}; } if $W->{"r"}->method() eq "POST";
227 # Do not: $W->{"r"}->args()
228 # as it parses only QUERY_STRING (not POST data).
229 $W->{"args_orig_array"}=[ CGI->new($W->{"r"})->Vars() ];
230 $W->{"args"}={ @{$W->{"args_orig_array"}} };
231 for my $name (keys(%{$W->{"args"}})) {
232 my @vals=split /\x00/,$W->{"args"}{$name};
234 $W->{"args"}{$name}=[@vals];
237 $W->{"headers_in"}=$W->{"r"}->headers_in();
238 Wrequire 'My::Hash::Merge';
239 $W->{"headers_in"}=My::Hash::Merge->new(
242 "_remote_ip"=>sub { return $W->{"r"}->connection()->remote_ip(); },
245 Wrequire 'My::Hash::Readonly';
246 $W->{"headers_in"}=My::Hash::Readonly->new($W->{"headers_in"});
248 if ($W->{"r"}->method() eq "GET" || $W->{"r"}->method() eq "HEAD") {
249 for (\$W->{"http_safe"}) {
250 # Do not: # Extend the current ETag system instead if you would need it:
251 # cluck "Explicitely NOT HTTP-Safe for method \"".$W->{"r"}->method()."\"?!?"
252 # if defined($$_) && !$$_;
253 # as sometimes it just does not make sense to cache it.
254 $$_=1 if !defined $$_;
258 for (\$W->{"http_safe"}) {
259 cluck "Undefined HTTP-Safe-ty for method \"".$W->{"r"}->method()."\"!"
261 $$_=0 if !defined $$_;
264 if ($W->{"http_safe"}) {
265 Wrequire 'My::Hash::RecordKeys';
266 $W->{"headers_in_RecordKeys"}=My::Hash::RecordKeys->new($W->{"headers_in"});
267 $W->{"headers_in"}=$W->{"headers_in_RecordKeys"};
270 $W->{"browser"}=HTTP::BrowserDetect->new($W->{"headers_in"}{"User-Agent"});
272 if (!defined $W->{"have_style"}) {
273 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
276 $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
277 if ($W->{"detect_js"} && !$W->{"have_js"}) {
278 $W->{"head"}.='<script type="text/javascript" src="'.uri_escaped(path_web('/My/HaveJS.pm')).'"></script>'."\n";
281 do { _args_check(%$_) if $_; } for ($W->{"args_check"});
283 return bless $W,$class;
286 # Be aware other parts of code (non-My::Web) will NOT use this function!
287 # Do not: Wprint $W->{"heading"},"undef"=>1;
288 # as we would need to undef() it to turn it off and it would get defaulted in such case.
289 # Do not: exists $W->{"heading"}
290 # as we use a lot of 'for $W->{"heading"}' which instantiates it with the value: undef()
295 cluck "undef Wprint" if !defined $text && !$args{"undef"};
296 delete $args{"undef"};
297 cluck join(" ","Invalid arguments:",keys(%args)) if keys(%args);
298 return if !defined $text;
299 # Do not: cluck "utf-8 untested" if Encode::is_utf8($text);
300 # as it is valid here.
301 $W->{"r"}->puts($text);
308 # Prevent &CGI::escapeHTML breaking utf-8 strings like: \xC4\x9B eq \x{11B}
309 # Prevent case if we run under mod_perl but still just initializing:
310 request_check() if $ENV{"MOD_PERL"};
311 # Generally we are initialized from &init but we may be used without it without mod_perl
312 # and in such case check the change on all non-first invocations.
314 if (!$ENV{"MOD_PERL"} && $init++) {
315 do { cluck "charset==$_" if $_ ne "utf-8"; } for CGI::charset();
317 CGI::charset("utf-8");
319 return CGI::escapeHTML($text);
322 # /home/user/www/webdir
323 sub dir_top_abs_disk()
325 our $dir_top_abs_disk;
326 if (!$dir_top_abs_disk) {
327 my $selfpkg_relpath=__PACKAGE__;
328 $selfpkg_relpath=~s{::}{/}g;
329 $selfpkg_relpath.=".pm";
330 my $selfpkg_abspath=$INC{$selfpkg_relpath} or do {
331 cluck "Unable to find self package $selfpkg_relpath";
334 $selfpkg_abspath=~s{/*\Q$selfpkg_relpath\E$}{} or do {
335 cluck "Unable to strip myself \"$selfpkg_relpath\" from the abspath: $selfpkg_abspath";
338 cluck "INC{myself} is relative?: $selfpkg_abspath" if $selfpkg_abspath!~m{^/};
339 $dir_top_abs_disk=$selfpkg_abspath;
341 return $dir_top_abs_disk;
347 if (!$W->{"unparsed_uri"}) {
349 # as we may be called before &init from: &My::Project::init
350 my $r=Apache2::RequestUtil->request();
351 cluck "Calling ".'&unparsed_uri'." from a static code, going to fail" if !$r;
352 my $uri_string=$r->unparsed_uri() or cluck "Valid 'r' missing unparsed_uri()?";
353 my $uri=URI->new_abs($uri_string,"http://".$W->{"web_hostname"}."/");
354 $W->{"unparsed_uri"}=$uri;
356 return $W->{"unparsed_uri"};
363 # Otherwise we may have been already processed and thus legally relativized.
364 # FIXME data: Currently disabled, all the data are too violating such rule.
366 my $uri_check=URI->new($in);
367 $uri_check->scheme() || $in=~m{^\Q./\E} || $in=~m{^/}
368 or cluck "Use './' or '/' prefix for all the local references: $in";
370 my $uri=URI->new_abs($in,unparsed_uri());
371 $uri=$uri->canonical();
375 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
381 cluck if !$args{"uri_as_in"} && ref $in;
382 my $uri=in_to_uri_abs($in);
383 if (uri_is_local($uri)) {
384 # Prefer the $uri values over "args_persistent" values.
385 $uri->query_form_hash({
388 my $val=$W->{"args"}{$key};
389 (!defined $val ? () : ($key=>$val));
390 } keys(%{$W->{"args_persistent"}})),
391 %{$uri->query_form_hash()},
394 return $uri->abs(unparsed_uri()) if $W->{"args"}{"Wabs"} || $args{"abs"};
395 return $uri->rel(unparsed_uri());
398 sub path_abs_disk_register($)
400 my($path_abs_disk)=@_;
402 $W->{"path_abs_disk_register"}{$path_abs_disk}=1;
405 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
406 sub path_abs_disk($%)
410 cluck if !$args{"uri_as_in"} && ref $in;
411 my $uri=in_to_uri_abs($in);
412 cluck if !uri_is_local($uri);
413 my $path=$uri->path();
414 cluck "URI compatibility: ->path() not w/leading slash of URI \"$uri\"; path: $path" if $path!~m{^/};
415 my $r=dir_top_abs_disk().$path;
416 path_abs_disk_register $r if !defined $args{"register"} || $args{"register"};
426 while (my($name,$regex)=each(%tmpl)) {
427 my $name_html="Parameter <span class=\"quote\">".escapeHTML($name)."</span>";
428 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
429 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
430 fatal "$name_html passed as multivar although singlevar expected"
431 if ref $W->{"args"}{$name} && !ref $regex;
432 $regex=$regex->[0] if ref $regex;
433 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
434 $val="" if !defined $val;
435 fatal "$name_html <span class=\"quote\">".escapeHTML($val)."</span>"
436 ." does not match the required regex <span class=\"quote\">".escapeHTML($regex)."</span> "
437 if $regex ne "" && $val!~/$regex/;
446 return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'> </p>'."\n";
453 $msg="UNKNOWN" if !$msg;
456 # Do not send it unconditionally.
457 # The intial duplicated '<?xml...' crashes Gecko parser.
458 $W->{"heading_done"}=0 if $W->{"header_only"};
459 # Do not send it unconditionally.
460 # Prevents warn: Headers already sent
461 if (!$W->{"heading_done"}) {
462 $W->{"indexme"}=0; # For the case no heading was sent yet.
463 $W->{"header_only"}=0; # assurance for &heading
466 Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
467 ."<p>You can report this problem's details to"
468 ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
474 exit 1 if $W->{"footer_passed"}++; # deadlock prevention:
476 Wprint vskip if $W->{"footer_delimit"};
478 do { Wprint $_ if $_; } for $W->{"footing_delimit"};
480 Wprint "<hr />\n" if $W->{"footer"};
482 my $packages_used=$packages_used_array{$W->{"__PACKAGE__"}};
484 if ($W->{"footer_ids"}) {
485 Wprint '<p class="cvs-id">';
486 Wprint join("<br />\n",map({ my $package=$_;
487 my $cvs_id=(eval('$'.$package."::CVS_ID")
488 # || $package # debug
494 $cvs_id='$'.$cvs_id.'$'; # Eaten by 'q' operator.
495 my @cvs_id_split=split / +/,$cvs_id;
496 if (@cvs_id_split==8) {
503 my $path_abs_disk=path_abs_disk("/$file$ext");
504 push @tried,$path_abs_disk;
505 last if -r $path_abs_disk;
506 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
510 .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
512 $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
513 ($package!~/^Apache2::/ ? $package : $cvs_id_split[1]));
514 $cvs_id_split[5]=&{$W->{"cvs_id_author_sub"}}($cvs_id_split[5]);
516 join " ",@cvs_id_split;
522 for my $package (@$packages_used) {
523 my $cvs_id=(eval('$'.$package."::CVS_ID")
524 # || $package # debug
526 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
529 do { Wprint $_ if $_; } for $W->{"footing"};
531 Wprint "</body></html>\n";
535 # Existing entries are overwritten.
540 while (my($key,$val)=each(%pairs)) {
541 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
542 $W->{"r"}->headers_out()->set($key,$val);
552 elsif ($size<1024*1024)
553 { $size=sprintf "%.1fK",$size/1024; }
555 { $size=sprintf "%.1fM",$size/1024/1024; }
564 my $uri_rel=in_to_uri_abs($in)->rel(unparsed_uri());
565 # Do not: defined $uri_rel->("userinfo"|"host"|"port")();
566 # as they fail to be called for schemes not supporting them.
567 return 0 if $uri_rel->scheme();
568 return 0 if $uri_rel->authority();
572 # &path_web still may be required for &uri_escaped !
578 my $urient=escapeHTML($uri);
579 return $uri if $uri eq $urient;
581 return $urient if uri_is_local $uri;
582 return $uri if defined $W->{"have_ent"} && !$W->{"have_ent"}; # non-ent client
583 return $urient if $W->{"have_ent"}; # ent client
584 # Unknown client, &escapeHTML should not be needed here:
585 return escapeHTML(path_web('/My/Redirect.pm?location='.uri_escape($uri->abs(unparsed_uri()))));
588 our $a_href_inhibited;
591 my($in,$contents,%args)=@_;
594 do { $$_=1 if !defined $$_; } for (\$args{"size"});
595 if (!defined $contents) {
597 $contents=File::Basename::basename($contents) if $args{"basename"};
598 $contents=escapeHTML($contents);
600 $contents=~s#<a\b[^>]*>##gi;
601 $contents=~s#</a>##gi;
602 return $contents if $a_href_inhibited;
604 my $path_web=path_web $in,%args;
607 $r.=uri_escaped $path_web;
609 do { $r.=" $_" if $_; } for ($args{"attr"});
610 $r.='>'.$contents.'</a>';
611 if ($args{"size"} && uri_is_local($in) && ($args{"size"}>=2 || $in=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) { # Downloadable?
612 my $path_abs_disk=path_abs_disk $in,%args;
613 cluck "File not readable: $path_abs_disk" if !-r $path_abs_disk;
614 $r.=' ('.size_display((stat($path_abs_disk))[7]).')';
619 sub a_href_inhibit($$;@)
621 my($self,$sub,@sub_args)=@_;
623 local $a_href_inhibited=1;
624 return &{$sub}(@sub_args);
627 sub input_hidden_persistents()
632 my $val=$W->{"args"}{$key};
633 (!defined $val ? () : '<input type="hidden"'
634 .' name="'.escapeHTML($key).'"'
635 .' value="'.escapeHTML($val).'"'
637 } (keys(%{$W->{"args_persistent"}}))));
642 my($self,$url,$status)=@_;
644 $url=path_web($url,"abs"=>1);
645 $status||=HTTP_MOVED_TEMPORARILY;
646 $W->{"r"}->status($status);
647 $W->{"r"}->headers_out()->{"Location"}=$url;
648 $W->{"header_only"}=1;
656 # Do not: PerlModule Apache2::ForwardedFor
657 # PerlPostReadRequestHandler Apache2::ForwardedFor
658 # As 'Apache2::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
659 # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
660 # We must take the last item ourselves.
661 # Be VERY sure you always retrieve all the headers unconditionally to hit: My::Hash::RecordKeys
662 my $x_forwarded_for=$W->{"headers_in"}{"X-Forwarded-For"};
663 $x_forwarded_for=~s/^.*,\s*// if $x_forwarded_for;
664 my $remote_ip=$W->{"headers_in"}{"_remote_ip"};
666 $r||=$x_forwarded_for;
671 # $url={"JP"=>"http://specific",...};
672 # $url={""=>"http://default",...};
675 my($url,$contents,%args)=@_;
677 # A bit ineffective but we must process all the possibilities to get stable 'headers_in' hits!
678 my %map=map(($_=>a_href($url->{$_},$contents,%args)),keys(%$url));
680 $cc||=Geo::IP->new()->country_code_by_addr(remote_ip()) if $have_Geo_IP;
691 # FIXME: &alarm, --timeout is now infinite.
692 # FIXME: Try to remove bash(1).
693 # FIXME: Use: @PATH_FLOCK@
694 my @argv=('flock',dir_top_abs_disk(),'bash','-c',$cmd.' >&2');
695 print STDERR join(" ","SPAWN:",@argv)."\n";
703 cluck "Pathname not absolute: $file" if $file!~m{^/};
705 # TODO: Somehow quickly check dependencies?
706 return make('make -s --no-print-directory'
707 .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'");
712 my($width,$height)=@_;
714 cluck if !defined $width || !defined $height;
715 return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
716 ." width=\"$width\" height=\"$height\"";
719 sub negotiate_variant (%)
723 my @fields=("id","qs","content-type","encoding","charset","lang","size");
724 return [ map(($args{$_}),@fields) ];
727 # Input: $self is required!
728 # Input: Put the fallback variant as the first one.
729 # Returns: always only scalar!
730 sub Negotiate_choose($$)
732 my($self,$variants)=@_;
734 # Limit these entries to generate proper 'Vary' header.
735 my %hash=(map(($_=>$W->{"headers_in"}{$_}),qw(
741 my $best=HTTP::Negotiate::choose($variants,
743 # to prevent: Can't locate object method "scan" via package "Apache2::RequestRec" at HTTP/Negotiate.pm line 84.
744 # Do not: $W->{"r"}->headers_in()
745 # to prevent: Can't locate object method "scan" via package "APR::Table" at HTTP/Negotiate.pm line 84.
746 # Do not: HTTP::Headers->new($W->{"r"}->headers_in());
747 # to prevent empty result or even: Odd number of elements in anonymous hash
748 HTTP::Headers->new(%hash));
749 $best||=$variants->[0][0]; # $variants->[0]{"id"}; &HTTP::Negotiate::choose failed?
754 { "id"=>"png","qs"=>0.9,"content-type"=>"image/png" },
755 { "id"=>"gif","qs"=>0.7,"content-type"=>"image/gif" },
757 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
759 # Returns: ($path_web,$path_abs_disk)
760 # URI path segments support ignored here. Where it is used? (';' path segment options)
765 cluck if !uri_is_local $in;
766 my $uri=in_to_uri_abs $in;
767 my $path_abs_disk=path_abs_disk $uri,%args,"uri_as_in"=>1,"register"=>0;
769 # Known image extension?
770 return path_web($uri,%args,"uri_as_in"=>1),$path_abs_disk if $uri->path()=~m#$img_variants_re#o;
773 for my $var (@img_variants) {
774 my $path_abs_disk_variant=$path_abs_disk.".".$var->{"id"};
775 path_abs_disk_register($path_abs_disk_variant);
776 __PACKAGE__->make_file($path_abs_disk_variant);
777 push @nego_variants,negotiate_variant(
779 "size"=>(stat $path_abs_disk_variant)[7],
782 my $ext=__PACKAGE__->Negotiate_choose(\@nego_variants);
784 $uri->path($uri->path().".$ext");
785 return path_web($uri,%args,"uri_as_in"=>1),path_abs_disk($uri,%args,"uri_as_in"=>1);
791 my($in,$alt,%args)=@_;
794 my($path_web,$path_abs_disk)=_img_src($in,%args);
795 my($width,$height)=Image::Size::imgsize($path_abs_disk);
797 $alt=escapeHTML($alt);
798 my $content="<img src=\"".uri_escaped($path_web)."\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
799 .(!$args{"attr"} ? "" : " ".$args{"attr"})." />";
800 do { return a_href((_img_src($_))[0],$content,"uri_as_in"=>1) if $_; } for $args{"a_href_img"};
801 do { return a_href $_,$content if $_; } for $args{"a_href"};
808 $r.='<table border="0" width="100%"><tr>'."\n";
809 @_=( [@_] ) if !ref $_[0];
811 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
813 $r.='</tr></table>'."\n";
819 my($text,@args_img)=@_;
821 # FIXME: Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
822 # <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
823 # <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
824 # causes whole invisible projects in: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Galeon/1.3.21
826 <table border="0" width="100%">
832 @{[ &{\&img}(@args_img) ]}
841 my($class,$filename)=@_;
844 open F,$filename or cluck "Cannot open \"$filename\": $!";
845 my $F=do { local $/=undef(); <F>; };
846 close F or cluck "Cannot close \"$filename\": $!";
854 header("Expires"=>HTTP::Date::time2str(1000000000)); # date in the past
855 header("Last-Modified"=>HTTP::Date::time2str()); # always modified
856 header("Cache-Control"=>join(", ",
861 "pre-check=0", # MSIE
862 "post-check=0", # MSIE
864 header("Pragma"=>"no-cache"); # HTTP/1.0
865 header("Vary"=>"*"); # content may ba based on unpredictable sources
868 sub headers_in_filtered(@)
872 return map(($_=>$W->{"headers_in"}{$_}),@keys);
875 our %uri_args_frozen_to_headers_in_keys;
876 our %uri_args_headers_in_frozen_to_headers_out;
878 sub uri_args_headers_in_frozen_get($)
880 my($headers_in_keys_arrayref)=@_;
882 my %uri_args_headers_in_hash=(
883 "uri_args_frozen"=>$W->{"uri_args_frozen"},
884 "headers_in"=>{ headers_in_filtered(@$headers_in_keys_arrayref) },
886 return do { local $Storable::canonical=1; Storable::freeze(\%uri_args_headers_in_hash); };
889 sub cache_output_filter($)
893 while ($f->read(my $text,0x400)) {
894 cluck "utf-8 untested" if Encode::is_utf8($text); # Possible here at all?
896 $W->{"digest-md5"}->add($text);
903 if (!$W->{"http_safe"}) {
904 __PACKAGE__->_no_cache();
909 # &Wrequire it here even if it will not be later used; to be stable!
910 Wrequire 'My::Hash::RestrictTo';
912 "uri"=>"http://".$W->{"web_hostname"}."/".$W->{"r"}->uri(),
913 "args"=>$W->{"args_orig_array"},
915 $W->{"uri_args_frozen"}=do { local $Storable::canonical=1; Storable::freeze(\%uri_args_hash); };
916 last if !(my $headers_in_keys_arrayref=$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}});
918 # Protection to be sure we are stable:
919 $W->{"headers_in"}=My::Hash::RestrictTo->new($W->{"headers_in"},@$headers_in_keys_arrayref);
921 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get($headers_in_keys_arrayref);
922 last if !(my $headers_out_hashref=$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}});
923 header(%$headers_out_hashref);
926 # &meets_conditions will always deny the attempt if !2xx status().
927 # At least ap_read_request() sets: r->status=HTTP_REQUEST_TIME_OUT; /* Until we get a request */
928 my $status_old=$W->{"r"}->status();
929 $W->{"r"}->status(HTTP_OK);
930 # Update httpd's 'r->mtime' as the header "Last-Modified" is just not enough for ap_meets_conditions():
931 # &update_mtime() argument is really in _secs_, not in _msecs_ as the docs claim.
932 # Be aware '*1000000' would overflow Perl integer anyway.
933 # &set_last_modified would also override the "Last-Modified" headers_out!
934 # &mtime may exist but somehow does not work.
935 $W->{"r"}->update_mtime(HTTP::Date::str2time($headers_out_hashref->{"Last-Modified"}));
936 $status=$W->{"r"}->meets_conditions();
937 $W->{"r"}->status($status_old);
940 $W->{"r"}->status($status);
945 $W->{"digest-md5"}=Digest::MD5->new();
946 $W->{"cache_active"}=1;
947 $W->{"r"}->add_output_filter(\&cache_output_filter);
950 sub cache_finish_last_modified()
952 cluck "Not yet done now? W __PACKAGE__: ".$W->{"__PACKAGE__"}
953 if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
954 for my $package_orig (@{$packages_used_array{$W->{"__PACKAGE__"}}}) {
955 local $_=$package_orig.".pm";
957 path_abs_disk "/$_","register"=>1;
960 for my $path_abs_disk (keys(%{$W->{"path_abs_disk_register"}})) {
961 my $mtime=(stat $path_abs_disk)[9];
962 do { cluck "No mtime for: $path_abs_disk"; next; } if !$mtime;
963 $mtime_newest=$mtime if !$mtime_newest || $mtime_newest<$mtime;
965 cluck "No mtime_newest found for the current W __PACKAGE__: ".$W->{"__PACKAGE__"}
967 return HTTP::Date::time2str($mtime_newest);
973 # Do not: return if !$W->{"uri_args_frozen"};
974 # as we may have just gave 304 and 'exit 0;' without starting the caching.
975 return if !$W->{"cache_active"};
977 # Fill-in/check: %uri_args_frozen_to_headers_in_keys
978 my $headers_in_keys_stored_arrayref_ref=\$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}};
979 my @headers_in_keys=tied(%{$W->{"headers_in_RecordKeys"}})->accessed();
980 if (!$$headers_in_keys_stored_arrayref_ref
981 || !Data::Compare::Compare(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)) {
982 cluck "Non-matching generated 'headers_in_keys' per 'uri_args_frozen' key:\n"
983 .Dumper(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)
984 if $$headers_in_keys_stored_arrayref_ref;
985 # Build or possibly prevent such further warn dupes:
986 $$headers_in_keys_stored_arrayref_ref=\@headers_in_keys;
987 # Build or regenerate as obsoleted now:
988 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get(\@headers_in_keys);
991 # Prepare 'headers_out' for the future reusal:
993 # Do not: $W->{"digest-md5"}->b64digest();
994 # as it will not provide the trailing filling '='s.
995 # RFC 1864 is not clear but the same provides them.
996 # FIXME: Should we somehow provide "\r\n" newlines for the text data? Which content is "text"?
997 # Maybe it does not apply to HTTP as RFC 1864 targets mail/MIME.
998 # ',""' to avoid breaking the headers by its default "\n".
999 $headers_out{"Content-MD5"}=MIME::Base64::encode_base64($W->{"digest-md5"}->digest(),"");
1000 # In fact we could also use MD5 for ETag as if we know ETag we also know MD5.
1001 # But this way we do not need to calculate MD5 and we still can provide such ETag. So.
1002 # $W->{"r"}->set_etag() ?
1003 $headers_out{"ETag"}='"'.Digest::MD5::md5_base64($W->{"uri_args_headers_in_frozen"}).'"';
1004 # $W->{"r"}->set_content_length() ?
1005 $headers_out{"Content-Length"}=$W->{"r"}->bytes_sent();
1006 my %Vary=map(($_=>1),(@headers_in_keys));
1012 %Vary=("*"=>1) if $Vary{"*"};
1013 $headers_out{"Vary"}=join(", ",sort keys(%Vary));
1014 # $W->{"r"}->set_last_modified() ?
1015 $headers_out{"Last-Modified"}=cache_finish_last_modified();
1017 # Fill-in/check: %uri_args_headers_in_frozen_to_headers_out
1018 my $headers_out_stored_hashref_ref=\$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}};
1019 if (!$$headers_out_stored_hashref_ref
1020 || !Data::Compare::Compare(\%headers_out,$$headers_out_stored_hashref_ref)) {
1021 cluck "Non-matching generated 'headers_out' per 'uri_args_headers_in_frozen' key:\n"
1022 .Dumper(\%headers_out,$$headers_out_stored_hashref_ref)
1023 if $$headers_out_stored_hashref_ref;
1024 # Build or possibly prevent such further warn dupes:
1025 $$headers_out_stored_hashref_ref=\%headers_out;
1028 ###print STDERR Dumper(\%uri_args_frozen_to_headers_in_keys,\%uri_args_headers_in_frozen_to_headers_out);
1035 if (!$W->{"header_only"}) {
1036 header("Content-Style-Type"=>"text/css");
1037 header("Content-Script-Type"=>"text/javascript");
1038 # $W->{"r"}->content_languages() ?
1039 do { header("Content-Language"=>$_) if $_; } for $W->{"language"};
1041 # TODO: Support also: private
1042 header("Cache-Control"=>"public"); # HTTP/1.1
1044 # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
1045 my $client_charset=$W->{"force_charset"} || "us-ascii";
1048 # https://bugzilla.mozilla.org/show_bug.cgi?id=120556
1050 # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1052 # http://validator.w3.org/ does not send ANY "Accept" headers!
1053 $mime||="application/xhtml+xml" if 1
1054 && !$W->{"headers_in"}{"Accept"}
1055 && ($W->{"headers_in"}{"User-Agent"}||"")=~m{^W3C_Validator/}i;
1056 $mime||=$class->Negotiate_choose([
1057 # Put the fallback variant as the first one.
1058 # Rate both variants the same to prefer "text/html" for undecided clients.
1060 # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1061 # prefers "application/xhtml+xml" over "text/html" itself:
1062 # text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
1065 "content-type"=>"text/html",
1067 "charset"=>$client_charset,
1068 "lang"=>$W->{"language"},
1071 "id"=>"application/xhtml+xml",
1072 "content-type"=>"application/xhtml+xml",
1074 "charset"=>$client_charset,
1075 "lang"=>$W->{"language"},
1080 # mod_perl doc: If you set this header via the headers_out table directly, it
1081 # will be ignored by Apache. So do not do that.
1082 $W->{"r"}->content_type("$mime; charset=$client_charset");
1085 return if $W->{"header_only"};
1086 # We still can append headers before we put out some text.
1087 # FIXME: It is not clean to still append them without overwriting.
1088 return if $W->{"heading_done"}++;
1090 Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n" if $mime=~m{^application/\w+[+]xml$};
1091 return if $W->{"xml_header_only"};
1092 Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
1093 Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$W->{"language"}.'">'."\n";
1094 my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
1095 # Do not: cluck if $title=~/[<>]/;
1096 # as it is not solved just by: &a_href_inhibit
1097 # as sometimes titles use also: <i>...</i>
1098 $title=~s#<[^>]*>##g;
1100 Wprint "<title>$title</title>\n";
1101 if ($W->{"have_css"}) {
1102 # Everything can get overriden later.
1103 for my $css ("/My/Web.css",map((!$_ ? () : ("ARRAY" ne ref($_) ? $_ : @$_)),$W->{"css_push"})) {
1105 <link rel="stylesheet" type="text/css" href="@{[ uri_escaped(path_web $css) ]}" />
1108 if ($W->{"css_inherit"}) {
1110 <script type="text/javascript" src="@{[ uri_escaped(path_web('/My/css_inherit.js')) ]}" />
1114 Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
1115 Wprint $W->{"head"};
1116 for my $type (qw(prev next index contents start up)) {
1117 do { Wprint '<link rel="'.$type.'" href="'.uri_escaped(path_web $_).'" />'."\n" if $_; }
1118 for ($W->{"rel_$type"});
1120 Wprint "</head><body";
1121 # Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
1122 # if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
1123 Wprint $W->{"body_attr"};
1126 do { Wprint $_ if $_; } for $W->{"heading"};
1130 delete $W->{"__My::Web_init"};