+make(1) locking by flock(1)
[MyWeb.git] / Web.pm
diff --git a/Web.pm b/Web.pm
index 845e96c..2a93ce1 100644 (file)
--- a/Web.pm
+++ b/Web.pm
@@ -27,7 +27,7 @@ use Exporter;
 sub Wrequire ($);
 sub Wuse ($@);
 our $W;
-our @EXPORT=qw(&Wrequire &Wuse &a_href &a_href_cz &vskip &img $W &top_dir);
+our @EXPORT=qw(&Wrequire &Wuse &a_href &a_href_cz &vskip &img $W &top_dir &top_dir_disk);
 our @ISA=qw(Exporter);
 
 BEGIN
@@ -156,7 +156,7 @@ my($class,%args)=@_;
 
        $W->{"have_js"}=($W->{"args"}{"have_js"} ? 1 : 0);
        if ($W->{"detect_js"} && !$W->{"have_js"}) {
-               $W->{"head"}.='<script type="text/javascript" src="'.top_dir().'/have_js.js.pl"></script>'."\n";
+               $W->{"head"}.='<script type="text/javascript" src="'.top_dir('/have_js.js.pl').'"></script>'."\n";
                }
 
        do { args_check(%$_) if $_; } for ($W->{"args_check"});
@@ -164,12 +164,41 @@ my($class,%args)=@_;
        return $W;
 }
 
-sub top_dir ()
+sub top_dir_disk ()
 {
        do { return $_ if $_; } for ($W->{"top_dir"});
        return $INC[0]; # fallback
 }
 
+sub top_dir (;$)
+{
+my($in)=@_;
+
+       if (my $uri=$ENV{"REQUEST_URI"}) {
+               $uri.="Index" if $uri=~m#/$#;
+               if (defined $in) {
+                       my($inpath,$inquery)=split /[?]/,$in,2;
+                       $inpath=~tr///cs;
+                       $uri=~tr///cs;
+                       for (;;) {
+                               my($in1 ,$in2 )=($in =~m#^(/[^/]+)(/.*)$#);
+                               my($uri1,$uri2)=($uri=~m#^(/[^/]+)(/.*)$#);
+                               last if !defined $in1 || !defined $uri1 || $in1 ne $uri1;
+                               $in=$in2;
+                               $uri=$uri2;
+                               }
+                       }
+               $uri=~s#^/*##;
+               $uri=~s#[^/]+#..#g;
+               $uri=File::Basename::dirname($uri);
+               my $r=$uri.(defined $in ? $in : "");
+#              1 while $r=~s#^[.]/##;
+#              $r="./$r" if $r=~m#^(?:?.*)$#;  # empty pathname?
+               return $r;
+               }
+       return top_dir_disk().$in;
+}
+
 sub fatal (;$);
 
 sub args_check (%)
@@ -177,13 +206,13 @@ sub args_check (%)
 my(%tmpl)=@_;
 
        while (my($name,$regex)=each(%tmpl)) {
-               my $name_html="Parametr <span class=\"quote\">".CGI::escapeHTML($name)."</span>";
+               my $name_html="Parameter <span class=\"quote\">".CGI::escapeHTML($name)."</span>";
+               $W->{"args"}{$name}="" if !defined $W->{"args"}{$name};
                my $val=$W->{"args"}{$name};
+               $val="" if !defined $val;
                fatal "$name_html <span class=\"quote\">".CGI::escapeHTML($val)."</span>"
-                                               ." does not match required regex <span class=\"quote\">".CGI::escapeHTML($regex)."</span>"
-                               if defined $val && $val!~/$regex/;
-               fatal "$name_html is required"
-                               if !defined $val;
+                                               ." does not match required regex <span class=\"quote\">".CGI::escapeHTML($regex)."</span> "
+                               if $regex ne "" && $val!~/$regex/;
                }
 }
 
@@ -216,7 +245,7 @@ sub footer (;$)
        print "<hr />\n" if $W->{"footer"};
 
        if ($W->{"footer_mailme"}) {
-               print '<form action="'.top_dir().'/SendMsg.pl" method="post" onsubmit="'
+               print '<form action="'.top_dir('/SendMsg.pl').'" method="post" onsubmit="'
                                ."this.elements['msgscript'].value=this.elements['msghtml'].value;"
                                ."this.elements['msghtml'].value='';"
                                ."this.submit();"
@@ -247,7 +276,7 @@ sub footer (;$)
                                        my $ext;
                                        for (qw(.html.pl .pl .pm),"") {
                                                $ext=$_;
-                                               last if -r top_dir()."/$file$ext";
+                                               last if -r top_dir_disk()."/$file$ext";
                                                cluck "Class file $file not found" if !$ext;
                                                }
                                        $file.=$ext;
@@ -276,7 +305,7 @@ sub footer (;$)
                my $cvs_id=(eval('$'.$package."::CVS_ID")
 #                              || $package     # debug
                                );
-               print '<!-- $'.$cvs_id.'$ -->'."\n" if $cvs_id;
+               print '<!-- '.$package.' - $'.$cvs_id.'$ -->'."\n" if $cvs_id;
                }
 
        if ($W->{"heading"}) {
@@ -331,6 +360,8 @@ my($url,$contents,%args)=@_;
        $contents=~s#<a\b[^>]*>##gi;
        $contents=~s#</a>##gi;
 
+       $url=top_dir($url) if url_is_local $url && $url=~m#^/#;
+
        my $r='<a href="';
        my $urlent=CGI::escapeHTML($url);
           if ($url eq $urlent)
@@ -342,11 +373,12 @@ my($url,$contents,%args)=@_;
        elsif ($W->{"have_ent"})        # ent client
                { $r.=$urlent; }
        else    # unknown client, &CGI::escapeHTML should not be needed here
-               { $r.=CGI::escapeHTML(top_dir()."/Redirect.pl?location=".uri_escape($url)); }
+               { $r.=CGI::escapeHTML(top_dir('/Redirect.pl?location='.uri_escape($url))); }
        $r.='"';
        do { $r.=" $_" if $_; } for ($args{"attr"});
-       $r.='">'.$contents.'</a>';
+       $r.='>'.$contents.'</a>';
        if ($args{"size"} && url_is_local($url) && $url=~/[.](?:gz|Z|rpm|zip|deb|lha)/) {       # Downloadable?
+               $url=top_dir_disk().$url if $url=~m#^/#;
                if (!-r $url)
                        { cluck "File not readable: $url"; }
                else {
@@ -381,6 +413,13 @@ my($url,$contents,%args)=@_;
        return $contents;
 }
 
+sub make ($)
+{
+my($cmd)=@_;
+
+       system {'flock'} 'flock','-x',top_dir_disk(),$cmd.' >&2';
+}
+
 sub img_size ($$)
 {
 my($width,$height)=@_;
@@ -401,22 +440,35 @@ my @img_variants=(
                { "id"=>"png","qs"=>1.0,"content-type"=>"image/png" },
                { "id"=>"gif","qs"=>0.9,"content-type"=>"image/gif" },
                );
-my $img_variants_re='[.](?:'.join('|',map(($_->{"id"}),@img_variants)).')$';
+my $img_variants_re='[.](?:'.join('|',"jpeg",map(($_->{"id"}),@img_variants)).')$';
 
 sub img_src ($)
 {
 my($file_base)=@_;
 
-       return $file_base if !url_is_local($file_base)
+       if (!url_is_local($file_base)
                        # Known image extension?
-                       || $file_base=~m#$img_variants_re#o;
+                       || $file_base=~m#$img_variants_re#o) {
+               return $file_base if !wantarray();
+               return ($file_base,$file_base);
+               }
+
+       my $file_base_disk;
+       my $file_base_uri;
+       if ($file_base!~m#^/#) {
+               $file_base_disk=$file_base_uri=$file_base;
+               }
+       else {
+               $file_base_disk=top_dir_disk().$file_base;
+               $file_base_uri=top_dir($file_base);
+               }
 
        my @nego_variants;
        for my $var (@img_variants) {
-               my $file=$file_base.".".$var->{"id"};
+               my $file=$file_base_disk.".".$var->{"id"};
                # TODO: Somehow quickly check dependencies?
-               system 'make >&2 -s --no-print-directory'
-                                               .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'"
+               make('make -s --no-print-directory'
+                                               .' -C '."'".File::Basename::dirname($file)."' '".File::Basename::basename($file)."'")
                                if !-f $file;
                push @nego_variants,negotiate_variant(
                                %$var,
@@ -427,18 +479,20 @@ my($file_base)=@_;
        # but should we provide somehow either 'HTTP::Headers' or 'HTTP::Request' ?
        my $ext=HTTP::Negotiate::choose(\@nego_variants);
        $ext||=$img_variants[0]->{"id"};        # &HTTP::Negotiate::choose failed?
-       return $file_base.".".$ext;
+
+       return $file_base_uri.".".$ext if !wantarray();
+       return ($file_base_uri.".".$ext,$file_base_disk.".".$ext);
 }
 
 sub img ($$;$)
 {
 my($file_base,$alt,$attrs)=@_;
 
-       my $file=img_src $file_base;
-       my($width,$height)=Image::Size::imgsize($file);
+       my($file_uri,$file_disk)=img_src $file_base;
+       my($width,$height)=Image::Size::imgsize($file_disk);
        $alt=~s/<[^>]*>//g;
        $alt=CGI::escapeHTML($alt);
-       return "<img src=\"$file\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
+       return "<img src=\"$file_uri\" alt=\"$alt\" title=\"$alt\" ".img_size($width,$height)
                        .(!$attrs ? "" : " ".$attrs)." />";
 }
 
@@ -520,6 +574,9 @@ HERE
 
        print '<meta name="robots" content="'.($W->{"indexme"} ? "" : "no" ).'index,follow" />'."\n";
        print $W->{"head"};
+       for my $type (qw(prev next index contents start up)) {
+               do { print '<link rel="'.$type.'" href="'.$_.'" />'."\n" if $_; } for ($W->{"rel_$type"});
+               }
        print "</head><body";
        print ' bgcolor="black" text="white" link="aqua" vlink="teal"'
                        if $W->{"browser"}->netscape() && $W->{"browser"}->major<=4;