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 { $have_Geo_IP=eval { require Geo::IP; 1; }; }
108 # Do not: use ModPerl::Util qw(exit);
109 # to prevent in mod_perl2: "exit" is not exported by the ModPerl::Util module
111 use POSIX qw(strftime);
113 use Apache2::Const qw(HTTP_MOVED_TEMPORARILY OK HTTP_OK);
120 require Data::Compare;
124 use Apache2::Connection;
131 my($apache_request)=@_;
133 $packages_used_hash{$W->{"__PACKAGE__"}}{"_done"}=1;
140 sub request_check(;$)
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
155 print STDERR "$class->init ".Apache2::RequestUtil->request()->unparsed_uri()."\n";
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.
164 "__PACKAGE__"=>scalar(caller()),
166 %args, # override %WebConfig settings
167 },"My::Hash::Sub","My::Hash::Push");
169 # {"__PACKAGE__"} is mandatory for mod_perl-2.0;
170 # $Apache2::Registry::curstash is no longer supported.
171 do { cluck "No $_" if !$W->{$_}; } for "__PACKAGE__";
174 do { cluck "charset==$_, expecting ISO-8859-1" if $_ ne "ISO-8859-1"; } for CGI::charset();
175 CGI::charset("utf-8");
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";
190 for (qw(footer_ids)) {
191 $W->{$_}=0 if !$W->{"footer"};
192 $footer_any=1 if $W->{$_};
194 $W->{"footer"}=0 if !$footer_any;
195 $W->{"footer_delimit"}=0 if !$W->{"footer"};
197 $W->{"r"}=Apache2::RequestUtil->request();
199 $W->{"r"}->push_handlers("PerlCleanupHandler"=>\&cleanup);
201 $W->{"web_hostname"}||=$W->{"r"}->hostname();
203 tie *STDOUT,$W->{"r"};
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; }
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')
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};
233 $W->{"args"}{$name}=[@vals];
236 $W->{"headers_in"}=$W->{"r"}->headers_in();
237 Wrequire 'My::Hash::Merge';
238 $W->{"headers_in"}=My::Hash::Merge->new(
241 "_remote_ip"=>sub { return $W->{"r"}->connection()->remote_ip(); },
244 $W->{"headers_in"}=My::Hash::Readonly->new($W->{"headers_in"});
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 $$_=1 if !defined $$_;
255 for (\$W->{"http_safe"}) {
256 cluck "Undefined HTTP-Safe-ty for method \"".$W->{"r"}->method()."\"!"
258 $$_=0 if !defined $$_;
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"};
267 $W->{"browser"}=HTTP::BrowserDetect->new($W->{"headers_in"}{"User-Agent"});
269 if (!defined $W->{"have_style"}) {
270 $W->{"have_style"}=(!$W->{"browser"}->netscape() || ($W->{"browser"}->major() && $W->{"browser"}->major()>4) ? 1 : 0);
273 $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
274 if ($W->{"detect_js"} && !$W->{"have_js"}) {
275 $W->{"head"}.='<script type="text/javascript" src="'.uri_escaped(path_web('/My/HaveJS.pm')).'"></script>'."\n";
278 do { _args_check(%$_) if $_; } for ($W->{"args_check"});
280 return bless $W,$class;
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()
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);
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 $ENV{"MOD_PERL"};
307 # Generally we are initialized from &init but we may be used without it without mod_perl
308 # and in such case check the change on all non-first invocations.
310 if (!$ENV{"MOD_PERL"} && $init++) {
311 do { cluck "charset==$_" if $_ ne "utf-8"; } for CGI::charset();
313 CGI::charset("utf-8");
315 return CGI::escapeHTML($text);
318 # /home/user/www/webdir
319 sub dir_top_abs_disk()
321 our $dir_top_abs_disk;
322 if (!$dir_top_abs_disk) {
323 my $selfpkg_relpath=__PACKAGE__;
324 $selfpkg_relpath=~s{::}{/}g;
325 $selfpkg_relpath.=".pm";
326 my $selfpkg_abspath=$INC{$selfpkg_relpath} or do {
327 cluck "Unable to find self package $selfpkg_relpath";
330 $selfpkg_abspath=~s{/*\Q$selfpkg_relpath\E$}{} or do {
331 cluck "Unable to strip myself \"$selfpkg_relpath\" from the abspath: $selfpkg_abspath";
334 cluck "INC{myself} is relative?: $selfpkg_abspath" if $selfpkg_abspath!~m{^/};
335 $dir_top_abs_disk=$selfpkg_abspath;
337 return $dir_top_abs_disk;
343 if (!$W->{"unparsed_uri"}) {
345 # as we may be called before &init from: &My::Project::init
346 my $r=Apache2::RequestUtil->request();
347 cluck "Calling ".'&unparsed_uri'." from a static code, going to fail" if !$r;
348 my $uri_string=$r->unparsed_uri() or cluck "Valid 'r' missing unparsed_uri()?";
349 my $uri=URI->new_abs($uri_string,"http://".$W->{"web_hostname"}."/");
350 $W->{"unparsed_uri"}=$uri;
352 return $W->{"unparsed_uri"};
359 # Otherwise we may have been already processed and thus legally relativized.
360 # FIXME data: Currently disabled, all the data are too violating such rule.
362 my $uri_check=URI->new($in);
363 $uri_check->scheme() || $in=~m{^\Q./\E} || $in=~m{^/}
364 or cluck "Use './' or '/' prefix for all the local references: $in";
366 my $uri=URI->new_abs($in,unparsed_uri());
367 $uri=$uri->canonical();
371 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
377 cluck if !$args{"uri_as_in"} && ref $in;
378 my $uri=in_to_uri_abs($in);
379 if (uri_is_local($uri)) {
380 # Prefer the $uri values over "args_persistent" values.
381 $uri->query_form_hash({
384 my $val=$W->{"args"}{$key};
385 (!defined $val ? () : ($key=>$val));
386 } keys(%{$W->{"args_persistent"}})),
387 %{$uri->query_form_hash()},
390 return $uri->abs(unparsed_uri()) if $W->{"args"}{"Wabs"} || $args{"abs"};
391 return $uri->rel(unparsed_uri());
394 sub path_abs_disk_register($)
396 my($path_abs_disk)=@_;
398 $W->{"path_abs_disk_register"}{$path_abs_disk}=1;
401 # $args{"uri_as_in"}=1 to permit passing URI objects as: $in
402 sub path_abs_disk($%)
406 cluck if !$args{"uri_as_in"} && ref $in;
407 my $uri=in_to_uri_abs($in);
408 cluck if !uri_is_local($uri);
409 my $path=$uri->path();
410 cluck "URI compatibility: ->path() not w/leading slash of URI \"$uri\"; path: $path" if $path!~m{^/};
411 my $r=dir_top_abs_disk().$path;
412 path_abs_disk_register $r if !defined $args{"register"} || $args{"register"};
422 while (my($name,$regex)=each(%tmpl)) {
423 my $name_html="Parameter <span class=\"quote\">".escapeHTML($name)."</span>";
424 $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
425 $W->{"args"}{$name}=[ $W->{"args"}{$name} ] if !ref $W->{"args"}{$name} && ref $regex;
426 fatal "$name_html passed as multivar although singlevar expected"
427 if ref $W->{"args"}{$name} && !ref $regex;
428 $regex=$regex->[0] if ref $regex;
429 for my $val (!ref $W->{"args"}{$name} ? $W->{"args"}{$name} : @{$W->{"args"}{$name}}) {
430 $val="" if !defined $val;
431 fatal "$name_html <span class=\"quote\">".escapeHTML($val)."</span>"
432 ." does not match the required regex <span class=\"quote\">".escapeHTML($regex)."</span> "
433 if $regex ne "" && $val!~/$regex/;
442 return '<p'.(!defined $height ? "" : ' style="height: '.$height.';"').'> </p>'."\n";
449 $msg="UNKNOWN" if !$msg;
452 # Do not send it unconditionally.
453 # The intial duplicated '<?xml...' crashes Gecko parser.
454 $W->{"heading_done"}=0 if $W->{"header_only"};
455 # Do not send it unconditionally.
456 # Prevents warn: Headers already sent
457 if (!$W->{"heading_done"}) {
458 $W->{"indexme"}=0; # For the case no heading was sent yet.
459 $W->{"header_only"}=0; # assurance for &heading
462 Wprint "\n".vskip("3ex")."<hr /><h1 class=\"error\">FATAL ERROR: $msg!</h1>\n"
463 ."<p>You can report this problem's details to"
464 ." ".a_href("mailto:".$W->{"admin_mail"},"admin of this website").".</p>\n";
470 exit 1 if $W->{"footer_passed"}++; # deadlock prevention:
472 Wprint vskip if $W->{"footer_delimit"};
474 do { Wprint $_ if $_; } for $W->{"footing_delimit"};
476 Wprint "<hr />\n" if $W->{"footer"};
478 my $packages_used=$packages_used_array{$W->{"__PACKAGE__"}};
480 if ($W->{"footer_ids"}) {
481 Wprint '<p class="cvs-id">';
482 Wprint join("<br />\n",map({ my $package=$_;
483 my $cvs_id=(eval('$'.$package."::CVS_ID")
484 # || $package # debug
490 $cvs_id='$'.$cvs_id.'$'; # Eaten by 'q' operator.
491 my @cvs_id_split=split / +/,$cvs_id;
492 if (@cvs_id_split==8) {
499 my $path_abs_disk=path_abs_disk("/$file$ext");
500 push @tried,$path_abs_disk;
501 last if -r $path_abs_disk;
502 cluck "Class file $file not found; tried: ".join(" ",@tried) if !$ext;
506 .a_href((map({ my $s=$_; $s=~s#/viewcvs/#$&~checkout~/#; $s; } $W->{"viewcvs"}))[0]."$file?rev=".$cvs_id_split[2],
508 $cvs_id_split[1]=a_href($W->{"viewcvs"}.$file,
509 ($package!~/^Apache2::/ ? $package : $cvs_id_split[1]));
510 $cvs_id_split[5]=&{$W->{"cvs_id_author_sub"}}($cvs_id_split[5]);
512 join " ",@cvs_id_split;
518 for my $package (@$packages_used) {
519 my $cvs_id=(eval('$'.$package."::CVS_ID")
520 # || $package # debug
522 Wprint '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
525 do { Wprint $_ if $_; } for $W->{"footing"};
527 Wprint "</body></html>\n";
531 # Existing entries are overwritten.
536 while (my($key,$val)=each(%pairs)) {
537 do { cluck "Headers already sent"; next; } if $W->{"heading_done"};
538 $W->{"r"}->headers_out()->set($key,$val);
548 elsif ($size<1024*1024)
549 { $size=sprintf "%.1fK",$size/1024; }
551 { $size=sprintf "%.1fM",$size/1024/1024; }
560 my $uri_rel=in_to_uri_abs($in)->rel(unparsed_uri());
561 # Do not: defined $uri_rel->("userinfo"|"host"|"port")();
562 # as they fail to be called for schemes not supporting them.
563 return 0 if $uri_rel->scheme();
564 return 0 if $uri_rel->authority();
568 # &path_web still may be required for &uri_escaped !
574 my $urient=escapeHTML($uri);
575 return $uri if $uri eq $urient;
577 return $urient if uri_is_local $uri;
578 return $uri if defined $W->{"have_ent"} && !$W->{"have_ent"}; # non-ent client
579 return $urient if $W->{"have_ent"}; # ent client
580 # Unknown client, &escapeHTML should not be needed here:
581 return escapeHTML(path_web('/My/Redirect.pm?location='.uri_escape($uri->abs(unparsed_uri()))));
584 our $a_href_inhibited;
587 my($in,$contents,%args)=@_;
590 do { $$_=1 if !defined $$_; } for (\$args{"size"});
591 if (!defined $contents) {
593 $contents=File::Basename::basename($contents) if $args{"basename"};
594 $contents=escapeHTML($contents);
596 $contents=~s#<a\b[^>]*>##gi;
597 $contents=~s#</a>##gi;
598 return $contents if $a_href_inhibited;
600 my $path_web=path_web $in,%args;
603 $r.=uri_escaped $path_web;
605 do { $r.=" $_" if $_; } for ($args{"attr"});
606 $r.='>'.$contents.'</a>';
607 if ($args{"size"} && uri_is_local($in) && ($args{"size"}>=2 || $in=~/[.](?:gz|Z|rpm|zip|deb|lha)/)) { # Downloadable?
608 my $path_abs_disk=path_abs_disk $in,%args;
609 cluck "File not readable: $path_abs_disk" if !-r $path_abs_disk;
610 $r.=' ('.size_display((stat($path_abs_disk))[7]).')';
615 sub a_href_inhibit($$;@)
617 my($self,$sub,@sub_args)=@_;
619 local $a_href_inhibited=1;
620 return &{$sub}(@sub_args);
623 sub input_hidden_persistents()
628 my $val=$W->{"args"}{$key};
629 (!defined $val ? () : '<input type="hidden"'
630 .' name="'.escapeHTML($key).'"'
631 .' value="'.escapeHTML($val).'"'
633 } (keys(%{$W->{"args_persistent"}}))));
638 my($self,$url,$status)=@_;
640 $url=path_web($url,"abs"=>1);
641 $status||=HTTP_MOVED_TEMPORARILY;
642 $W->{"r"}->status($status);
643 $W->{"r"}->headers_out()->{"Location"}=$url;
644 $W->{"header_only"}=1;
652 # Do not: PerlModule Apache2::ForwardedFor
653 # PerlPostReadRequestHandler Apache2::ForwardedFor
654 # As 'Apache2::ForwardedFor' takes the first of $ENV{"HTTP_X_FORWARDED_FOR"}
655 # while the contents is '127.0.0.1, 213.220.195.171' if client has its own proxy.
656 # We must take the last item ourselves.
657 # Be VERY sure you always retrieve all the headers unconditionally to hit: My::Hash::RecordKeys
658 my $x_forwarded_for=$W->{"headers_in"}{"X-Forwarded-For"};
659 $x_forwarded_for=~s/^.*,\s*// if $x_forwarded_for;
660 my $remote_ip=$W->{"headers_in"}{"_remote_ip"};
662 $r||=$x_forwarded_for;
667 # $url={"JP"=>"http://specific",...};
668 # $url={""=>"http://default",...};
671 my($url,$contents,%args)=@_;
674 $cc||=Geo::IP->new()->country_code_by_addr(remote_ip()) if $have_Geo_IP;
677 return $contents if !$url;
678 return a_href $url,$contents,%args;
685 # FIXME: &alarm, --timeout is now infinite.
686 # FIXME: Try to remove bash(1).
687 # FIXME: Use: @PATH_FLOCK@
688 my @argv=('flock',dir_top_abs_disk(),'bash','-c',$cmd.' >&2');
689 print STDERR join(" ","SPAWN:",@argv)."\n";
697 cluck "Pathname not absolute: $file" if $file!~m{^/};
699 # TODO: Somehow quickly check dependencies?
700 return make('make -s --no-print-directory'
701 .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'");
706 my($width,$height)=@_;
708 cluck if !defined $width || !defined $height;
709 return ($W->{"have_style"} ? "style=\"border:0;width:${width}px;height:${height}px\"" : "border=\"0\"")
710 ." width=\"$width\" height=\"$height\"";
713 sub negotiate_variant (%)
717 my @fields=("id","qs","content-type","encoding","charset","lang","size");
718 return [ map(($args{$_}),@fields) ];
721 # Input: $self is required!
722 # Input: Put the fallback variant as the first one.
723 # Returns: always only scalar!
724 sub Negotiate_choose($$)
726 my($self,$variants)=@_;
728 # Limit these entries to generate proper 'Vary' header.
729 my %hash=(map(($_=>$W->{"headers_in"}{$_}),qw(
735 my $best=HTTP::Negotiate::choose($variants,
737 # to prevent: Can't locate object method "scan" via package "Apache2::RequestRec" at HTTP/Negotiate.pm line 84.
738 # Do not: $W->{"r"}->headers_in()
739 # to prevent: Can't locate object method "scan" via package "APR::Table" at HTTP/Negotiate.pm line 84.
740 # Do not: HTTP::Headers->new($W->{"r"}->headers_in());
741 # to prevent empty result or even: Odd number of elements in anonymous hash
742 HTTP::Headers->new(%hash));
743 $best||=$variants->[0][0]; # $variants->[0]{"id"}; &HTTP::Negotiate::choose failed?
748 { "id"=>"png","qs"=>0.9,"content-type"=>"image/png" },
749 { "id"=>"gif","qs"=>0.7,"content-type"=>"image/gif" },
751 my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
753 # Returns: ($path_web,$path_abs_disk)
754 # URI path segments support ignored here. Where it is used? (';' path segment options)
759 cluck if !uri_is_local $in;
760 my $uri=in_to_uri_abs $in;
761 my $path_abs_disk=path_abs_disk $uri,%args,"uri_as_in"=>1,"register"=>0;
763 # Known image extension?
764 return path_web($uri,%args,"uri_as_in"=>1),$path_abs_disk if $uri->path()=~m#$img_variants_re#o;
767 for my $var (@img_variants) {
768 my $path_abs_disk_variant=$path_abs_disk.".".$var->{"id"};
769 path_abs_disk_register($path_abs_disk_variant);
770 __PACKAGE__->make_file($path_abs_disk_variant);
771 push @nego_variants,negotiate_variant(
773 "size"=>(stat $path_abs_disk_variant)[7],
776 my $ext=__PACKAGE__->Negotiate_choose(\@nego_variants);
778 $uri->path($uri->path().".$ext");
779 return path_web($uri,%args,"uri_as_in"=>1),path_abs_disk($uri,%args,"uri_as_in"=>1);
785 my($in,$alt,%args)=@_;
788 my($path_web,$path_abs_disk)=_img_src($in,%args);
789 my($width,$height)=Image::Size::imgsize($path_abs_disk);
791 $alt=escapeHTML($alt);
792 my $content="<img src=\"".uri_escaped($path_web)."\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
793 .(!$args{"attr"} ? "" : " ".$args{"attr"})." />";
794 do { return a_href((_img_src($_))[0],$content,"uri_as_in"=>1) if $_; } for $args{"a_href_img"};
795 do { return a_href $_,$content if $_; } for $args{"a_href"};
802 $r.='<table border="0" width="100%"><tr>'."\n";
803 @_=( [@_] ) if !ref $_[0];
805 $r.="\t".'<td align="center">'.&{\&img}(@$_).'</td>'."\n";
807 $r.='</tr></table>'."\n";
813 my($text,@args_img)=@_;
815 # FIXME: Workaround bug of 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)':
816 # <col width="@{[ (!$W->{"browser"}->ie() ? "1*" : "90%" ) ]}" />
817 # <col width="@{[ (!$W->{"browser"}->ie() ? "0*" : "10%" ) ]}" />
818 # causes whole invisible projects in: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050719 Galeon/1.3.21
820 <table border="0" width="100%">
826 @{[ &{\&img}(@args_img) ]}
835 my($class,$filename)=@_;
838 open F,$filename or cluck "Cannot open \"$filename\": $!";
839 my $F=do { local $/=undef(); <F>; };
840 close F or cluck "Cannot close \"$filename\": $!";
848 header("Expires"=>HTTP::Date::time2str(1000000000)); # date in the past
849 header("Last-Modified"=>HTTP::Date::time2str()); # always modified
850 header("Cache-Control"=>join(", ",
855 "pre-check=0", # MSIE
856 "post-check=0", # MSIE
858 header("Pragma"=>"no-cache"); # HTTP/1.0
859 header("Vary"=>"*"); # content may ba based on unpredictable sources
862 sub headers_in_filtered(@)
866 return map(($_=>$W->{"headers_in"}{$_}),@keys);
869 our %uri_args_frozen_to_headers_in_keys;
870 our %uri_args_headers_in_frozen_to_headers_out;
872 sub uri_args_headers_in_frozen_get($)
874 my($headers_in_keys_arrayref)=@_;
876 my %uri_args_headers_in_hash=(
877 "uri_args_frozen"=>$W->{"uri_args_frozen"},
878 "headers_in"=>{ headers_in_filtered(@$headers_in_keys_arrayref) },
880 return do { local $Storable::canonical=1; Storable::freeze(\%uri_args_headers_in_hash); };
883 sub cache_output_filter($)
887 while ($f->read(my $text,0x400)) {
888 cluck "utf-8 untested" if Encode::is_utf8($text); # Possible here at all?
890 $W->{"digest-md5"}->add($text);
897 if (!$W->{"http_safe"}) {
898 __PACKAGE__->_no_cache();
903 # &Wrequire it here even if it will not be later used; to be stable!
904 Wrequire 'My::Hash::RestrictTo';
906 "uri"=>"http://".$W->{"web_hostname"}."/".$W->{"r"}->uri(),
907 "args"=>$W->{"args_orig_array"},
909 $W->{"uri_args_frozen"}=do { local $Storable::canonical=1; Storable::freeze(\%uri_args_hash); };
910 last if !(my $headers_in_keys_arrayref=$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}});
912 # Protection to be sure we are stable:
913 $W->{"headers_in"}=My::Hash::RestrictTo->new($W->{"headers_in"},@$headers_in_keys_arrayref);
915 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get($headers_in_keys_arrayref);
916 last if !(my $headers_out_hashref=$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}});
917 header(%$headers_out_hashref);
920 # &meets_conditions will always deny the attempt if !2xx status().
921 # At least ap_read_request() sets: r->status=HTTP_REQUEST_TIME_OUT; /* Until we get a request */
922 my $status_old=$W->{"r"}->status();
923 $W->{"r"}->status(HTTP_OK);
924 # Update httpd's 'r->mtime' as the header "Last-Modified" is just not enough for ap_meets_conditions():
925 # &update_mtime() argument is really in _secs_, not in _msecs_ as the docs claim.
926 # Be aware '*1000000' would overflow Perl integer anyway.
927 # &set_last_modified would also override the "Last-Modified" headers_out!
928 # &mtime may exist but somehow does not work.
929 $W->{"r"}->update_mtime(HTTP::Date::str2time($headers_out_hashref->{"Last-Modified"}));
930 $status=$W->{"r"}->meets_conditions();
931 $W->{"r"}->status($status_old);
934 $W->{"r"}->status($status);
939 $W->{"digest-md5"}=Digest::MD5->new();
940 $W->{"cache_active"}=1;
941 $W->{"r"}->add_output_filter(\&cache_output_filter);
944 sub cache_finish_last_modified()
946 cluck "Not yet done now? W __PACKAGE__: ".$W->{"__PACKAGE__"}
947 if !$packages_used_hash{$W->{"__PACKAGE__"}}{"_done"};
948 for my $package_orig (@{$packages_used_array{$W->{"__PACKAGE__"}}}) {
949 local $_=$package_orig.".pm";
951 path_abs_disk "/$_","register"=>1;
954 for my $path_abs_disk (keys(%{$W->{"path_abs_disk_register"}})) {
955 my $mtime=(stat $path_abs_disk)[9];
956 do { cluck "No mtime for: $path_abs_disk"; next; } if !$mtime;
957 $mtime_newest=$mtime if !$mtime_newest || $mtime_newest<$mtime;
959 cluck "No mtime_newest found for the current W __PACKAGE__: ".$W->{"__PACKAGE__"}
961 return HTTP::Date::time2str($mtime_newest);
967 # Do not: return if !$W->{"uri_args_frozen"};
968 # as we may have just gave 304 and 'exit 0;' without starting the caching.
969 return if !$W->{"cache_active"};
971 # Fill-in/check: %uri_args_frozen_to_headers_in_keys
972 my $headers_in_keys_stored_arrayref_ref=\$uri_args_frozen_to_headers_in_keys{$W->{"uri_args_frozen"}};
973 my @headers_in_keys=tied(%{$W->{"headers_in_RecordKeys"}})->accessed();
974 if (!$$headers_in_keys_stored_arrayref_ref
975 || !Data::Compare::Compare(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)) {
976 cluck "Non-matching generated 'headers_in_keys' per 'uri_args_frozen' key:\n"
977 .Dumper(\@headers_in_keys,$$headers_in_keys_stored_arrayref_ref)
978 if $$headers_in_keys_stored_arrayref_ref;
979 # Build or possibly prevent such further warn dupes:
980 $$headers_in_keys_stored_arrayref_ref=\@headers_in_keys;
981 # Build or regenerate as obsoleted now:
982 $W->{"uri_args_headers_in_frozen"}=uri_args_headers_in_frozen_get(\@headers_in_keys);
985 # Prepare 'headers_out' for the future reusal:
987 $headers_out{"Content-MD5"}=$W->{"digest-md5"}->b64digest();
988 # In fact we could also use MD5 for ETag as if we know ETag we also know MD5.
989 # But this way we do not need to calculate MD5 and we still can provide such ETag. So.
990 # $W->{"r"}->set_etag() ?
991 $headers_out{"ETag"}='"'.Digest::MD5::md5_base64($W->{"uri_args_headers_in_frozen"}).'"';
992 # $W->{"r"}->set_content_length() ?
993 $headers_out{"Content-Length"}=$W->{"r"}->bytes_sent();
994 my %Vary=map(($_=>1),(@headers_in_keys));
1000 %Vary=("*"=>1) if $Vary{"*"};
1001 $headers_out{"Vary"}=join(", ",sort keys(%Vary));
1002 # $W->{"r"}->set_last_modified() ?
1003 $headers_out{"Last-Modified"}=cache_finish_last_modified();
1005 # Fill-in/check: %uri_args_headers_in_frozen_to_headers_out
1006 my $headers_out_stored_hashref_ref=\$uri_args_headers_in_frozen_to_headers_out{$W->{"uri_args_headers_in_frozen"}};
1007 if (!$$headers_out_stored_hashref_ref
1008 || !Data::Compare::Compare(\%headers_out,$$headers_out_stored_hashref_ref)) {
1009 cluck "Non-matching generated 'headers_out' per 'uri_args_headers_in_frozen' key:\n"
1010 .Dumper(\%headers_out,$$headers_out_stored_hashref_ref)
1011 if $$headers_out_stored_hashref_ref;
1012 # Build or possibly prevent such further warn dupes:
1013 $$headers_out_stored_hashref_ref=\%headers_out;
1016 ###print STDERR Dumper(\%uri_args_frozen_to_headers_in_keys,\%uri_args_headers_in_frozen_to_headers_out);
1023 if (!$W->{"header_only"}) {
1024 header("Content-Style-Type"=>"text/css");
1025 header("Content-Script-Type"=>"text/javascript");
1026 # $W->{"r"}->content_languages() ?
1027 do { header("Content-Language"=>$_) if $_; } for $W->{"language"};
1029 # TODO: Support also: private
1030 header("Cache-Control"=>"public"); # HTTP/1.1
1032 # $ENV{"CLIENT_CHARSET"} ignored (mod_czech support dropped!)
1033 my $client_charset=$W->{"force_charset"} || "us-ascii";
1036 # https://bugzilla.mozilla.org/show_bug.cgi?id=120556
1038 # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1040 # http://validator.w3.org/ does not send ANY "Accept" headers!
1041 $mime||="application/xhtml+xml" if 1
1042 && !$W->{"headers_in"}{"Accept"}
1043 && ($W->{"headers_in"}{"User-Agent"}||"")=~m{^W3C_Validator/}i;
1044 $mime||=$class->Negotiate_choose([
1045 # Put the fallback variant as the first one.
1046 # Rate both variants the same to prefer "text/html" for undecided clients.
1048 # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b) Gecko/20050217
1049 # prefers "application/xhtml+xml" over "text/html" itself:
1050 # text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
1053 "content-type"=>"text/html",
1055 "charset"=>$client_charset,
1056 "lang"=>$W->{"language"},
1059 "id"=>"application/xhtml+xml",
1060 "content-type"=>"application/xhtml+xml",
1062 "charset"=>$client_charset,
1063 "lang"=>$W->{"language"},
1068 # mod_perl doc: If you set this header via the headers_out table directly, it
1069 # will be ignored by Apache. So do not do that.
1070 $W->{"r"}->content_type("$mime; charset=$client_charset");
1073 return if $W->{"header_only"};
1074 # We still can append headers before we put out some text.
1075 # FIXME: It is not clean to still append them without overwriting.
1076 return if $W->{"heading_done"}++;
1078 Wprint '<?xml version="1.0" encoding="'.$client_charset.'"?>'."\n" if $mime=~m{^application/\w+[+]xml$};
1079 return if $W->{"xml_header_only"};
1080 Wprint '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">'."\n";
1081 Wprint '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$W->{"language"}.'">'."\n";
1082 my $title=$W->{"title_prefix"}.join("",map({ ': '.$_; } ($W->{"title"} || ())));
1083 # Do not: cluck if $title=~/[<>]/;
1084 # as it is not solved just by: &a_href_inhibit
1085 # as sometimes titles use also: <i>...</i>
1086 $title=~s#<[^>]*>##g;
1088 Wprint "<title>$title</title>\n";
1089 if ($W->{"have_css"}) {
1090 # Everything can get overriden later.
1091 for my $css ("/My/Web.css",map((!$_ ? () : ("ARRAY" ne ref($_) ? $_ : @$_)),$W->{"css_push"})) {
1093 <link rel="stylesheet" type="text/css" href="@{[ uri_escaped(path_web $css) ]}" />
1096 if ($W->{"css_inherit"}) {
1098 <script type="text/javascript" src="@{[ uri_escaped(path_web('/My/css_inherit.js')) ]}" />
1102 Wprint '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
1103 Wprint $W->{"head"};
1104 for my $type (qw(prev next index contents start up)) {
1105 do { Wprint '<link rel="'.$type.'" href="'.uri_escaped(path_web $_).'" />'."\n" if $_; }
1106 for ($W->{"rel_$type"});
1108 Wprint "</head><body";
1109 # Wprint ' bgcolor="black" text="white" link="aqua" vlink="teal"'
1110 # if $W->{"browser"}->netscape() && (!$W->{"browser"}->major() || $W->{"browser"}->major()<=4);
1111 Wprint $W->{"body_attr"};
1114 do { Wprint $_ if $_; } for $W->{"heading"};
1118 delete $W->{"__My::Web_init"};