prepend '--' to filelist when calling git-diff-tree
[git.git] / gitweb.cgi
index e0e71ce..9ee24b8 100755 (executable)
@@ -2,8 +2,8 @@
 
 # gitweb - simple web interface to track changes in git repositories
 #
-# (C) 2005, Kay Sievers <kay.sievers@vrfy.org>
-# (C) 2005, Christian Gierke <ch@gierke.de>
+# (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
+# (C) 2005, Christian Gierke
 #
 # This program is licensed under the GPLv2
 
@@ -14,9 +14,10 @@ use CGI::Util qw(unescape);
 use CGI::Carp qw(fatalsToBrowser);
 use Encode;
 use Fcntl ':mode';
+binmode STDOUT, ':utf8';
 
 my $cgi = new CGI;
-my $version =          "252";
+my $version =          "266";
 my $my_url =           $cgi->url();
 my $my_uri =           $cgi->url(-absolute => 1);
 my $rss_link =         "";
@@ -79,8 +80,8 @@ if (defined $project) {
                undef $project;
                die_error(undef, "No such project.");
        }
-       $rss_link = "<link rel=\"alternate\" title=\"" . esc_url($project) . " log\" href=\"" .
-                   esc_url("$my_uri?p=$project;a=rss") . "\" type=\"application/rss+xml\"/>";
+       $rss_link = "<link rel=\"alternate\" title=\"" . esc_param($project) . " log\" href=\"" .
+                   "$my_uri?" . esc_param("p=$project;a=rss") . "\" type=\"application/rss+xml\"/>";
        $ENV{'GIT_DIR'} = "$projectroot/$project";
 } else {
        git_project_list();
@@ -145,7 +146,7 @@ sub validate_input {
        if ($input =~ m/(^|\/)(|\.|\.\.)($|\/)/) {
                return undef;
        }
-       if ($input =~ m/[^a-zA-Z0-9_ \.\/\-\+\#\~]/) {
+       if ($input =~ m/[^a-zA-Z0-9_\x80-\xff\ \t\.\/\-\+\#\~\%]/) {
                return undef;
        }
        return $input;
@@ -208,17 +209,31 @@ if (!defined $action || $action eq "summary") {
        exit;
 }
 
-sub esc_url {
+# quote unsafe chars, but keep the slash, even when it's not
+# correct, but quoted slashes look too horrible in bookmarks
+sub esc_param {
        my $str = shift;
+       $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
        $str =~ s/\+/%2B/g;
        $str =~ s/ /\+/g;
        return $str;
 }
 
+# replace invalid utf8 character with SUBSTITUTION sequence
 sub esc_html {
        my $str = shift;
-       $str = escapeHTML($str);
        $str = decode("utf8", $str, Encode::FB_DEFAULT);
+       $str = escapeHTML($str);
+       return $str;
+}
+
+# git may return quoted and escaped filenames
+sub unquote {
+       my $str = shift;
+       if ($str =~ m/^"(.*)"$/) {
+               $str = $1;
+               $str =~ s/\\([0-7]{1,3})/chr(oct($1))/eg;
+       }
        return $str;
 }
 
@@ -238,14 +253,17 @@ sub git_header_html {
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
-<!-- git web interface v$version, (C) 2005, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke <ch\@gierke.de> -->
+<!-- git web interface v$version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
 <head>
 <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
 <meta name="robots" content="index, nofollow"/>
 <title>$title</title>
 $rss_link
 <style type="text/css">
-body { font-family: sans-serif; font-size: 12px; margin:0px; border:solid #d9d8d1; border-width:1px; margin:10px; }
+body {
+       font-family: sans-serif; font-size: 12px; border:solid #d9d8d1; border-width:1px;
+       margin:10px; background-color:#ffffff; color:#000000;
+}
 a { color:#0000cc; }
 a:hover, a:visited, a:active { color:#880000; }
 div.page_header { height:25px; padding:8px; font-size:18px; font-weight:bold; background-color:#d9d8d1; }
@@ -296,17 +314,21 @@ a.rss_logo {
        text-align:center; text-decoration:none;
 }
 a.rss_logo:hover { background-color:#ee5500; }
+span.tag {
+       padding:0px 4px; font-size:10px; font-weight:normal;
+       background-color:#ffffaa; border:1px solid; border-color:#ffffcc #ffee00 #ffee00 #ffffcc;
+}
 </style>
 </head>
 <body>
 EOF
        print "<div class=\"page_header\">\n" .
              "<a href=\"http://www.kernel.org/pub/software/scm/git/docs/\" title=\"git documentation\">" .
-             "<img src=\"" . esc_url("$my_uri?a=git-logo.png") . "\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
+             "<img src=\"$my_uri?" . esc_param("a=git-logo.png") . "\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
              "</a>\n";
-       print $cgi->a({-href => esc_url($home_link)}, "projects") . " / ";
+       print $cgi->a({-href => esc_param($home_link)}, "projects") . " / ";
        if (defined $project) {
-               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, esc_html($project));
+               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, esc_html($project));
                if (defined $action) {
                        print " / $action";
                }
@@ -341,9 +363,9 @@ sub git_footer_html {
                if (defined $descr) {
                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
                }
-               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=rss"), -class => "rss_logo"}, "RSS") . "\n";
+               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=rss"), -class => "rss_logo"}, "RSS") . "\n";
        } else {
-               print $cgi->a({-href => esc_url("$my_uri?a=opml"), -class => "rss_logo"}, "OPML") . "\n";
+               print $cgi->a({-href => "$my_uri?" . esc_param("a=opml"), -class => "rss_logo"}, "OPML") . "\n";
        }
        print "</div>\n" .
              "</body>\n" .
@@ -374,6 +396,24 @@ sub git_get_type {
        return $type;
 }
 
+sub git_read_head {
+       my $project = shift;
+       my $oENV = $ENV{'GIT_DIR'};
+       my $retval = undef;
+       $ENV{'GIT_DIR'} = "$projectroot/$project";
+       if (open my $fd, "-|", "$gitbin/git-rev-parse", "--verify", "HEAD") {
+               my $head = <$fd>;
+               close $fd;
+               if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
+                       $retval = $1;
+               }
+       }
+       if (defined $oENV) {
+               $ENV{'GIT_DIR'} = $oENV;
+       }
+       return $retval;
+}
+
 sub git_read_hash {
        my $path = shift;
 
@@ -512,6 +552,7 @@ sub git_read_commit {
        };
 
        foreach my $title (@commit_lines) {
+               $title =~ s/^    //;
                if ($title ne "") {
                        $co{'title'} = chop_str($title, 80, 5);
                        # remove leading stuff of merges to make the interesting part visible
@@ -684,7 +725,7 @@ sub format_log_line_html {
        if ($line =~ m/([0-9a-fA-F]{40})/) {
                my $hash_text = $1;
                if (git_get_type($hash_text) eq "commit") {
-                       my $link = $cgi->a({-class => "text", -href => esc_url("$my_uri?p=$project;a=commit;h=$hash_text")}, $hash_text);
+                       my $link = $cgi->a({-class => "text", -href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_text")}, $hash_text);
                        $line =~ s/$hash_text/$link/;
                }
        }
@@ -718,6 +759,7 @@ sub date_str {
 
 # git-logo (cached in browser for one day)
 sub git_logo {
+       binmode STDOUT, ':raw';
        print $cgi->header(-type => 'image/png', -expires => '+1d');
        # cat git-logo.png | hexdump -e '16/1 " %02x"  "\n"' | sed 's/ /\\x/g'
        print   "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a\x00\x00\x00\x0d\x49\x48\x44\x52" .
@@ -745,7 +787,7 @@ sub get_file_owner {
        }
        my $owner = $gcos;
        $owner =~ s/[,;].*$//;
-       return $owner;
+       return decode("utf8", $owner, Encode::FB_DEFAULT);
 }
 
 sub git_read_projects {
@@ -781,7 +823,7 @@ sub git_read_projects {
                        if (-e "$projectroot/$path/HEAD") {
                                my $pr = {
                                        path => $path,
-                                       owner => $owner,
+                                       owner => decode("utf8", $owner, Encode::FB_DEFAULT),
                                };
                                push @list, $pr
                        }
@@ -799,7 +841,7 @@ sub git_project_list {
                die_error(undef, "No project found.");
        }
        foreach my $pr (@list) {
-               my $head = git_read_hash("$pr->{'path'}/HEAD");
+               my $head = git_read_head($pr->{'path'});
                if (!defined $head) {
                        next;
                }
@@ -832,25 +874,25 @@ sub git_project_list {
                @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
                print "<th>Project</th>\n";
        } else {
-               print "<th>" . $cgi->a({-class => "header", -href => esc_url("$my_uri?o=project")}, "Project") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => "$my_uri?" . esc_param("o=project")}, "Project") . "</th>\n";
        }
        if (defined($order) && ($order eq "descr")) {
                @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
                print "<th>Description</th>\n";
        } else {
-               print "<th>" . $cgi->a({-class => "header", -href => esc_url("$my_uri?o=descr")}, "Description") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => "$my_uri?" . esc_param("o=descr")}, "Description") . "</th>\n";
        }
        if (defined($order) && ($order eq "owner")) {
                @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
                print "<th>Owner</th>\n";
        } else {
-               print "<th>" . $cgi->a({-class => "header", -href => esc_url("$my_uri?o=owner")}, "Owner") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => "$my_uri?" . esc_param("o=owner")}, "Owner") . "</th>\n";
        }
        if (defined($order) && ($order eq "age")) {
                @projects = sort {$a->{'commit'}{'age'} <=> $b->{'commit'}{'age'}} @projects;
                print "<th>Last Change</th>\n";
        } else {
-               print "<th>" . $cgi->a({-class => "header", -href => esc_url("$my_uri?o=age")}, "Last Change") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => "$my_uri?" . esc_param("o=age")}, "Last Change") . "</th>\n";
        }
        print "<th></th>\n" .
              "</tr>\n";
@@ -862,7 +904,7 @@ sub git_project_list {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-               print "<td>" . $cgi->a({-href => esc_url("$my_uri?p=$pr->{'path'};a=summary"), -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
+               print "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=summary"), -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
                      "<td>$pr->{'descr'}</td>\n" .
                      "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
                my $colored_age;
@@ -875,9 +917,9 @@ sub git_project_list {
                }
                print "<td>$colored_age</td>\n" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$pr->{'path'};a=summary")}, "summary") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$pr->{'path'};a=shortlog")}, "shortlog") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$pr->{'path'};a=log")}, "log") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$pr->{'path'};a=log")}, "log") .
                      "</td>\n" .
                      "</tr>\n";
        }
@@ -885,6 +927,26 @@ sub git_project_list {
        git_footer_html();
 }
 
+sub read_info_ref {
+       my $type = shift || "";
+       my %refs;
+       # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c      refs/tags/v2.6.11
+       # c39ae07f393806ccf406ef966e9a15afc43cc36a      refs/tags/v2.6.11^{}
+       open my $fd, "$projectroot/$project/info/refs" or return;
+       while (my $line = <$fd>) {
+               chomp($line);
+               if ($line =~ m/^([0-9a-fA-F]{40})\t.*$type\/([^\^]+)/) {
+                       if (defined $refs{$1}) {
+                               $refs{$1} .= " / $2";
+                       } else {
+                               $refs{$1} = $2;
+                       }
+               }
+       }
+       close $fd or return;
+       return \%refs;
+}
+
 sub git_read_refs {
        my $ref_dir = shift;
        my @reflist;
@@ -950,7 +1012,7 @@ sub git_read_refs {
 
 sub git_summary {
        my $descr = git_read_description($project) || "none";
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        my %co = git_read_commit($head);
        my %cd = date_str($co{'committer_epoch'}, $co{'committer_tz'});
 
@@ -963,7 +1025,7 @@ sub git_summary {
                        $pr = unescape($pr);
                        $ow = unescape($ow);
                        if ($pr eq $project) {
-                               $owner = $ow;
+                               $owner = decode("utf8", $ow, Encode::FB_DEFAULT);
                                last;
                        }
                }
@@ -973,14 +1035,15 @@ sub git_summary {
                $owner = get_file_owner("$projectroot/$project");
        }
 
+       my $refs = read_info_ref();
        git_header_html();
        print "<div class=\"page_nav\">\n" .
              "summary".
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree")}, "tree") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
        print "<div class=\"title\">&nbsp;</div>\n";
@@ -989,11 +1052,11 @@ sub git_summary {
              "<tr><td>owner</td><td>$owner</td></tr>\n" .
              "<tr><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n" .
              "</table>\n";
-       open my $fd, "-|", "$gitbin/git-rev-list --max-count=17 " . git_read_hash("$project/HEAD") or die_error(undef, "Open failed.");
+       open my $fd, "-|", "$gitbin/git-rev-list --max-count=17 " . git_read_head($project) or die_error(undef, "Open failed.");
        my (@revlist) = map { chomp; $_ } <$fd>;
        close $fd;
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog"), -class => "title"}, "shortlog") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog"), -class => "title"}, "shortlog") .
              "</div>\n";
        my $i = 16;
        print "<table cellspacing=\"0\">\n";
@@ -1008,24 +1071,28 @@ sub git_summary {
                }
                $alternate ^= 1;
                if ($i-- > 0) {
+                       my $ref = "";
+                       if (defined $refs->{$commit}) {
+                               $ref = " <span class=\"tag\">" . esc_html($refs->{$commit}) . "</span>";
+                       }
                        print "<td><i>$co{'age_string'}</i></td>\n" .
                              "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
                              "<td>";
                        if (length($co{'title_short'}) < length($co{'title'})) {
-                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
-                                     "<b>" . esc_html($co{'title_short'}) . "</b>");
+                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
+                                     "<b>" . esc_html($co{'title_short'}) . "$ref</b>");
                        } else {
-                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"},
-                                     "<b>" . esc_html($co{'title'}) . "</b>");
+                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list"},
+                                     "<b>" . esc_html($co{'title'}) . "$ref</b>");
                        }
                        print "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                              "</td>\n" .
                              "</tr>";
                } else {
-                       print "<td>" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "...") . "</td>\n" .
+                       print "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "...") . "</td>\n" .
                        "</tr>";
                        last;
                }
@@ -1035,7 +1102,7 @@ sub git_summary {
        my $taglist = git_read_refs("refs/tags");
        if (defined @$taglist) {
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=tags"), -class => "title"}, "tags") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tags"), -class => "title"}, "tags") .
                      "</div>\n";
                my $i = 16;
                print "<table cellspacing=\"0\">\n";
@@ -1056,27 +1123,27 @@ sub git_summary {
                        if ($i-- > 0) {
                                print "<td><i>$tag{'age'}</i></td>\n" .
                                      "<td>" .
-                                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
+                                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
                                      "<b>" . esc_html($tag{'name'}) . "</b>") .
                                      "</td>\n" .
                                      "<td>";
                                if (defined($comment)) {
-                                     print $cgi->a({-class => "list", -href => esc_url("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, $comment);
+                                     print $cgi->a({-class => "list", -href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}")}, $comment);
                                }
                                print "</td>\n" .
                                      "<td class=\"link\">";
                                if ($tag{'type'} eq "tag") {
-                                     print $cgi->a({-href => esc_url("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
+                                     print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
                                }
-                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
+                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
                                if ($tag{'reftype'} eq "commit") {
-                                     print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
-                                           " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$tag{'refid'}")}, "log");
+                                     print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                           " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'refid'}")}, "log");
                                }
                                print "</td>\n" .
                                      "</tr>";
                        } else {
-                               print "<td>" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tags")}, "...") . "</td>\n" .
+                               print "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tags")}, "...") . "</td>\n" .
                                "</tr>";
                                last;
                        }
@@ -1087,7 +1154,7 @@ sub git_summary {
        my $headlist = git_read_refs("refs/heads");
        if (defined @$headlist) {
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=heads"), -class => "title"}, "heads") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=heads"), -class => "title"}, "heads") .
                      "</div>\n";
                my $i = 16;
                print "<table cellspacing=\"0\">\n";
@@ -1103,16 +1170,16 @@ sub git_summary {
                        if ($i-- > 0) {
                                print "<td><i>$tag{'age'}</i></td>\n" .
                                      "<td>" .
-                                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"},
+                                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"},
                                      "<b>" . esc_html($tag{'name'}) . "</b>") .
                                      "</td>\n" .
                                      "<td class=\"link\">" .
-                                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
-                                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$tag{'name'}")}, "log") .
+                                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'name'}")}, "log") .
                                      "</td>\n" .
                                      "</tr>";
                        } else {
-                               print "<td>" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=heads")}, "...") . "</td>\n" .
+                               print "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=heads")}, "...") . "</td>\n" .
                                "</tr>";
                                last;
                        }
@@ -1123,27 +1190,27 @@ sub git_summary {
 }
 
 sub git_tag {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my %tag = git_read_tag($hash);
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($tag{'name'})) . "\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($tag{'name'})) . "\n" .
              "</div>\n";
        print "<div class=\"title_text\">\n" .
              "<table cellspacing=\"0\">\n" .
              "<tr>\n" .
              "<td>object</td>\n" .
-             "<td>" . $cgi->a({-class => "list", -href => esc_url("$my_uri?p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'object'}) . "</td>\n" .
-             "<td class=\"link\">" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'type'}) . "</td>\n" .
+             "<td>" . $cgi->a({-class => "list", -href => "$my_uri?" . esc_param("p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'object'}) . "</td>\n" .
+             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'type'}) . "</td>\n" .
              "</tr>\n";
        if (defined($tag{'author'})) {
                my %ad = date_str($tag{'epoch'}, $tag{'tz'});
@@ -1162,20 +1229,20 @@ sub git_tag {
 }
 
 sub git_tags {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my $taglist = git_read_refs("refs/tags");
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -1195,22 +1262,22 @@ sub git_tags {
                        $alternate ^= 1;
                        print "<td><i>$tag{'age'}</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
                              "<b>" . esc_html($tag{'name'}) . "</b>") .
                              "</td>\n" .
                              "<td>";
                        if (defined($comment)) {
-                             print $cgi->a({-class => "list", -href => esc_url("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, $comment);
+                             print $cgi->a({-class => "list", -href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}")}, $comment);
                        }
                        print "</td>\n" .
                              "<td class=\"link\">";
                        if ($tag{'type'} eq "tag") {
-                             print $cgi->a({-href => esc_url("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
+                             print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
                        }
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
                        if ($tag{'reftype'} eq "commit") {
-                             print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
-                                   " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$tag{'refid'}")}, "log");
+                             print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                   " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'refid'}")}, "log");
                        }
                        print "</td>\n" .
                              "</tr>";
@@ -1221,20 +1288,20 @@ sub git_tags {
 }
 
 sub git_heads {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my $taglist = git_read_refs("refs/heads");
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -1249,11 +1316,11 @@ sub git_heads {
                        $alternate ^= 1;
                        print "<td><i>$tag{'age'}</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"}, "<b>" . esc_html($tag{'name'}) . "</b>") .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$tag{'name'}")}, "log") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$tag{'name'}")}, "log") .
                              "</td>\n" .
                              "</tr>";
                }
@@ -1278,7 +1345,7 @@ sub git_get_hash_by_path {
                        my $t_mode = $1;
                        my $t_type = $2;
                        my $t_hash = $3;
-                       my $t_name = $4;
+                       my $t_name = validate_input(unquote($4));
                        if ($t_name eq $part) {
                                if (!(@parts)) {
                                        return $t_hash;
@@ -1294,28 +1361,28 @@ sub git_get_hash_by_path {
 
 sub git_blob {
        if (!defined $hash && defined $file_name) {
-               my $base = $hash_base || git_read_hash("$project/HEAD");
-               $hash = git_get_hash_by_path($base, $file_name, "blob");
+               my $base = $hash_base || git_read_head($project);
+               $hash = git_get_hash_by_path($base, $file_name, "blob") || die_error(undef, "Error lookup file.");
        }
        open my $fd, "-|", "$gitbin/git-cat-file blob $hash" or die_error(undef, "Open failed.");
        git_header_html();
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") . "<br/>\n";
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") . "<br/>\n";
                if (defined $file_name) {
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob_plain;h=$hash;f=$file_name")}, "plain") .
-                       " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;hb=HEAD;f=$file_name")}, "head") . "<br/>\n";
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$hash;f=$file_name")}, "plain") .
+                       " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;hb=HEAD;f=$file_name")}, "head") . "<br/>\n";
                } else {
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob_plain;h=$hash")}, "plain") . "<br/>\n";
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob_plain;h=$hash")}, "plain") . "<br/>\n";
                }
                print "</div>\n".
                       "<div>" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n" .
@@ -1323,7 +1390,7 @@ sub git_blob {
                      "<div class=\"title\">$hash</div>\n";
        }
        if (defined $file_name) {
-               print "<div class=\"page_path\"><b>$file_name</b></div>\n";
+               print "<div class=\"page_path\"><b>" . esc_html($file_name) . "</b></div>\n";
        }
        print "<div class=\"page_body\">\n";
        my $nr;
@@ -1358,36 +1425,42 @@ sub git_blob_plain {
 
 sub git_tree {
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
                if (defined $file_name) {
-                       my $base = $hash_base || git_read_hash("$project/HEAD");
+                       my $base = $hash_base || $hash;
                        $hash = git_get_hash_by_path($base, $file_name, "tree");
                }
                if (!defined $hash_base) {
-                       $hash_base = git_read_hash("$project/HEAD");
+                       $hash_base = $hash;
                }
        }
-       open my $fd, "-|", "$gitbin/git-ls-tree $hash" or die_error(undef, "Open git-ls-tree failed.");
-       my (@entries) = map { chomp; $_ } <$fd>;
+       $/ = "\0";
+       open my $fd, "-|", "$gitbin/git-ls-tree -z $hash" or die_error(undef, "Open git-ls-tree failed.");
+       chomp (my (@entries) = <$fd>);
        close $fd or die_error(undef, "Reading tree failed.");
+       $/ = "\n";
 
+       my $refs = read_info_ref();
+       my $ref = "";
+       if (defined $refs->{$hash_base}) {
+               $ref = " <span class=\"tag\">" . esc_html($refs->{$hash_base}) . "</span>";
+       }
        git_header_html();
        my $base_key = "";
-       my $file_key = "";
        my $base = "";
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                $base_key = ";hb=$hash_base";
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash_base")}, "shortlog") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash_base")}, "log") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash_base")}, "shortlog") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash_base")}, "log") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
                      " | tree" .
                      "<br/><br/>\n" .
                      "</div>\n";
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'}) . $ref) . "\n" .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n";
@@ -1395,8 +1468,8 @@ sub git_tree {
                print "<div class=\"title\">$hash</div>\n";
        }
        if (defined $file_name) {
-               $base = "$file_name/";
-               print "<div class=\"page_path\"><b>/$file_name</b></div>\n";
+               $base = esc_html("$file_name/");
+               print "<div class=\"page_path\"><b>/" . esc_html($file_name) . "</b></div>\n";
        } else {
                print "<div class=\"page_path\"><b>/</b></div>\n";
        }
@@ -1409,8 +1482,7 @@ sub git_tree {
                my $t_mode = $1;
                my $t_type = $2;
                my $t_hash = $3;
-               my $t_name = $4;
-               $file_key = ";f=$base$t_name";
+               my $t_name = validate_input($4);
                if ($alternate) {
                        print "<tr class=\"dark\">\n";
                } else {
@@ -1420,18 +1492,18 @@ sub git_tree {
                print "<td style=\"font-family:monospace\">" . mode_str($t_mode) . "</td>\n";
                if ($t_type eq "blob") {
                        print "<td class=\"list\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key), -class => "list"}, $t_name) .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$t_hash$base_key;f=$base$t_name"), -class => "list"}, esc_html($t_name)) .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key)}, "blob") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=history;h=$hash_base" . $file_key)}, "history") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$t_hash$base_key;f=$base$t_name")}, "blob") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;h=$hash_base;f=$base$t_name")}, "history") .
                              "</td>\n";
                } elsif ($t_type eq "tree") {
                        print "<td class=\"list\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key)}, $t_name) .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$t_hash$base_key;f=$base$t_name")}, esc_html($t_name)) .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key)}, "tree") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$t_hash$base_key;f=$base$t_name")}, "tree") .
                              "</td>\n";
                }
                print "</tr>\n";
@@ -1443,7 +1515,7 @@ sub git_tree {
 
 sub git_rss {
        # http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-       open my $fd, "-|", "$gitbin/git-rev-list --max-count=150 " . git_read_hash("$project/HEAD") or die_error(undef, "Open failed.");
+       open my $fd, "-|", "$gitbin/git-rev-list --max-count=150 " . git_read_head($project) or die_error(undef, "Open failed.");
        my (@revlist) = map { chomp; $_ } <$fd>;
        close $fd or die_error(undef, "Reading rev-list failed.");
        print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
@@ -1487,7 +1559,8 @@ sub git_rss {
                        if (!($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/)) {
                                next;
                        }
-                       my $file = $7;
+                       my $file = validate_input(unquote($7));
+                       $file = decode("utf8", $file, Encode::FB_DEFAULT);
                        print "$file<br/>\n";
                }
                print "]]>\n" .
@@ -1511,7 +1584,7 @@ sub git_opml {
 
        foreach my $pr (@list) {
                my %proj = %$pr;
-               my $head = git_read_hash("$proj{'path'}/HEAD");
+               my $head = git_read_head($proj{'path'});
                if (!defined $head) {
                        next;
                }
@@ -1532,21 +1605,22 @@ sub git_opml {
 }
 
 sub git_log {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        if (!defined $hash) {
                $hash = $head;
        }
        if (!defined $page) {
                $page = 0;
        }
+       my $refs = read_info_ref();
        git_header_html();
        print "<div class=\"page_nav\">\n";
-       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
+       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash")}, "shortlog") .
              " | log" .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$hash;hb=$hash")}, "tree") . "<br/>\n";
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$hash;hb=$hash")}, "tree") . "<br/>\n";
 
        my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
        open my $fd, "-|", "$gitbin/git-rev-list $limit $hash" or die_error(undef, "Open failed.");
@@ -1554,19 +1628,19 @@ sub git_log {
        close $fd;
 
        if ($hash ne $head || $page) {
-               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "HEAD");
+               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "HEAD");
        } else {
                print "HEAD";
        }
        if ($page > 0) {
                print " &sdot; " .
-               $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash;pg=" . ($page-1)), -accesskey => "p", -title => "Alt-p"}, "prev");
+               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash;pg=" . ($page-1)), -accesskey => "p", -title => "Alt-p"}, "prev");
        } else {
                print " &sdot; prev";
        }
        if ($#revlist >= (100 * ($page+1)-1)) {
                print " &sdot; " .
-               $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash;pg=" . ($page+1)), -accesskey => "n", -title => "Alt-n"}, "next");
+               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash;pg=" . ($page+1)), -accesskey => "n", -title => "Alt-n"}, "next");
        } else {
                print " &sdot; next";
        }
@@ -1574,24 +1648,28 @@ sub git_log {
              "</div>\n";
        if (!@revlist) {
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary"), -class => "title"}, "&nbsp;") .
                      "</div>\n";
                my %co = git_read_commit($hash);
                print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
        }
        for (my $i = ($page * 100); $i <= $#revlist; $i++) {
                my $commit = $revlist[$i];
+               my $ref = "";
+               if (defined $refs->{$commit}) {
+                       $ref = " <span class=\"tag\">" . esc_html($refs->{$commit}) . "</span>";
+               }
                my %co = git_read_commit($commit);
                next if !%co;
                my %ad = date_str($co{'author_epoch'});
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "title"},
-                     "<span class=\"age\">$co{'age_string'}</span>" . esc_html($co{'title'})) . "\n" .
-                     "</div>\n";
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "title"},
+                     "<span class=\"age\">$co{'age_string'}</span>" . esc_html($co{'title'}) . $ref) . "\n";
+               print "</div>\n";
                print "<div class=\"title_text\">\n" .
                      "<div class=\"log_link\">\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                      "<br/>\n" .
                      "</div>\n" .
                      "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
@@ -1645,24 +1723,29 @@ sub git_commit {
        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
                $expires = "+1d";
        }
+       my $refs = read_info_ref();
+       my $ref = "";
+       if (defined $refs->{$co{'id'}}) {
+               $ref = " <span class=\"tag\">" . esc_html($refs->{$co{'id'}}) . "</span>";
+       }
        git_header_html(undef, $expires);
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash")}, "log") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash")}, "log") .
              " | commit";
        if (defined $co{'parent'}) {
-               print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff");
+               print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash")}, "commitdiff");
        }
-       print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "\n" .
+       print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "\n" .
              "<br/><br/></div>\n";
        if (defined $co{'parent'}) {
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash"), -class => "title"}, esc_html($co{'title'}) . $ref) . "\n" .
                      "</div>\n";
        } else {
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
                      "</div>\n";
        }
        print "<div class=\"title_text\">\n" .
@@ -1683,19 +1766,19 @@ sub git_commit {
        print "<tr>" .
              "<td>tree</td>" .
              "<td style=\"font-family:monospace\">" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"), class => "list"}, $co{'tree'}) .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash"), class => "list"}, $co{'tree'}) .
              "</td>" .
-             "<td class=\"link\">" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
+             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
              "</td>" .
              "</tr>\n";
        my $parents  = $co{'parents'};
        foreach my $par (@$parents) {
                print "<tr>" .
                      "<td>parent</td>" .
-                     "<td style=\"font-family:monospace\">" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$par"), class => "list"}, $par) . "</td>" .
+                     "<td style=\"font-family:monospace\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$par"), class => "list"}, $par) . "</td>" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$par")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash;hp=$par")}, "commitdiff") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$par")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash;hp=$par")}, "commitdiff") .
                      "</td>" .
                      "</tr>\n";
        }
@@ -1743,7 +1826,7 @@ sub git_commit {
                my $to_id = $4;
                my $status = $5;
                my $similarity = $6;
-               my $file = $7;
+               my $file = validate_input(unquote($7));
                if ($alternate) {
                        print "<tr class=\"dark\">\n";
                } else {
@@ -1756,16 +1839,16 @@ sub git_commit {
                                $mode_chng = sprintf(" with mode: %04o", (oct $to_mode) & 0777);
                        }
                        print "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
                              "<td><span style=\"color: #008000;\">[new " . file_type($to_mode) . "$mode_chng]</span></td>\n" .
-                             "<td class=\"link\">" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob") . "</td>\n";
+                             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob") . "</td>\n";
                } elsif ($status eq "D") {
                        print "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file)) . "</td>\n" .
                              "<td><span style=\"color: #c00000;\">[deleted " . file_type($from_mode). "]</span></td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, "blob") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=history;h=$hash;f=$file")}, "history") .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, "blob") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;h=$hash;f=$file")}, "history") .
                              "</td>\n"
                } elsif ($status eq "M" || $status eq "T") {
                        my $mode_chnge = "";
@@ -1785,18 +1868,18 @@ sub git_commit {
                        }
                        print "<td>";
                        if ($to_id ne $from_id) {
-                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
+                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
                        } else {
-                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
+                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, esc_html($file));
                        }
                        print "</td>\n" .
                              "<td>$mode_chnge</td>\n" .
                              "<td class=\"link\">";
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob");
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob");
                        if ($to_id ne $from_id) {
-                               print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file")}, "diff");
+                               print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file")}, "diff");
                        }
-                       print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=history;h=$hash;f=$file")}, "history") . "\n";
+                       print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=history;h=$hash;f=$file")}, "history") . "\n";
                        print "</td>\n";
                } elsif ($status eq "R") {
                        my ($from_file, $to_file) = split "\t", $file;
@@ -1805,14 +1888,14 @@ sub git_commit {
                                $mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
                        }
                        print "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file"), -class => "list"}, esc_html($to_file)) . "</td>\n" .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file"), -class => "list"}, esc_html($to_file)) . "</td>\n" .
                              "<td><span style=\"color: #777777;\">[moved from " .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$from_file"), -class => "list"}, esc_html($from_file)) .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$from_file"), -class => "list"}, esc_html($from_file)) .
                              " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file")}, "blob");
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file")}, "blob");
                        if ($to_id ne $from_id) {
-                               print " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file")}, "diff");
+                               print " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file")}, "diff");
                        }
                        print "</td>\n";
                }
@@ -1827,17 +1910,17 @@ sub git_blobdiff {
        git_header_html();
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") .
                      "<br/>\n";
-               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent")}, "plain") .
+               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent")}, "plain") .
                      "</div>\n";
                print "<div>\n" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) . "\n" .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n" .
@@ -1845,13 +1928,13 @@ sub git_blobdiff {
                      "<div class=\"title\">$hash vs $hash_parent</div>\n";
        }
        if (defined $file_name) {
-               print "<div class=\"page_path\"><b>/$file_name</b></div>\n";
+               print "<div class=\"page_path\"><b>/" . esc_html($file_name) . "</b></div>\n";
        }
        print "<div class=\"page_body\">\n" .
              "<div class=\"diff_info\">blob:" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$hash_parent;hb=$hash_base;f=$file_name")}, $hash_parent) .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash_parent;hb=$hash_base;f=$file_name")}, $hash_parent) .
              " -> blob:" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name")}, $hash) .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name")}, $hash) .
              "</div>\n";
        git_diff_print($hash_parent, $file_name || $hash_parent, $hash, $file_name || $hash);
        print "</div>";
@@ -1882,18 +1965,23 @@ sub git_commitdiff {
        if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
                $expires = "+1d";
        }
+       my $refs = read_info_ref();
+       my $ref = "";
+       if (defined $refs->{$co{'id'}}) {
+               $ref = " <span class=\"tag\">" . esc_html($refs->{$co{'id'}}) . "</span>";
+       }
        git_header_html(undef, $expires);
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash")}, "commit") .
              " | commitdiff" .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "<br/>\n";
-       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent")}, "plain") . "\n" .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "<br/>\n";
+       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent")}, "plain") . "\n" .
              "</div>\n";
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'}) . $ref) . "\n" .
              "</div>\n";
        print "<div class=\"page_body\">\n";
        my $comment = $co{'comment'};
@@ -1929,23 +2017,23 @@ sub git_commitdiff {
                my $from_id = $3;
                my $to_id = $4;
                my $status = $5;
-               my $file = $6;
+               my $file = validate_input(unquote($6));
                if ($status eq "A") {
                        print "<div class=\"diff_info\">" .  file_type($to_mode) . ":" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id) . "(new)" .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id) . "(new)" .
                              "</div>\n";
                        git_diff_print(undef, "/dev/null", $to_id, "b/$file");
                } elsif ($status eq "D") {
                        print "<div class=\"diff_info\">" . file_type($from_mode) . ":" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) . "(deleted)" .
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) . "(deleted)" .
                              "</div>\n";
                        git_diff_print($from_id, "a/$file", undef, "/dev/null");
                } elsif ($status eq "M") {
                        if ($from_id ne $to_id) {
                                print "<div class=\"diff_info\">" .
-                                     file_type($from_mode) . ":" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) .
+                                     file_type($from_mode) . ":" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) .
                                      " -> " .
-                                     file_type($to_mode) . ":" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id);
+                                     file_type($to_mode) . ":" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, $to_id);
                                print "</div>\n";
                                git_diff_print($from_id, "a/$file",  $to_id, "b/$file");
                        }
@@ -1964,23 +2052,18 @@ sub git_commitdiff_plain {
 
        # try to figure out the next tag after this commit
        my $tagname;
-       my %taghash;
-       my $tags = git_read_refs("refs/tags");
-       foreach my $entry (@$tags) {
-               my %tag = %$entry;
-               $taghash{$tag{'refid'}} = $tag{'name'};
-       }
+       my $refs = read_info_ref("tags");
        open $fd, "-|", "$gitbin/git-rev-list HEAD";
-       while (my $commit = <$fd>) {
-               chomp $commit;
-               if ($taghash{$commit}) {
-                       $tagname = $taghash{$commit};
+       chomp (my (@commits) = <$fd>);
+       close $fd;
+       foreach my $commit (@commits) {
+               if (defined $refs->{$commit}) {
+                       $tagname = $refs->{$commit}
                }
                if ($commit eq $hash) {
                        last;
                }
        }
-       close $fd;
 
        print $cgi->header(-type => "text/plain", -charset => 'utf-8', '-content-disposition' => "inline; filename=\"git-$hash.patch\"");
        my %co = git_read_commit($hash);
@@ -1996,7 +2079,7 @@ sub git_commitdiff_plain {
              "\n";
 
        foreach my $line (@$comment) {;
-               print "  $line\n";
+               print "$line\n";
        }
        print "---\n\n";
 
@@ -2018,28 +2101,29 @@ sub git_commitdiff_plain {
 
 sub git_history {
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
        }
        my %co = git_read_commit($hash);
        if (!%co) {
                die_error(undef, "Unknown commit object.");
        }
+       my $refs = read_info_ref();
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
              "</div>\n";
-       print "<div class=\"page_path\"><b>/$file_name</b><br/></div>\n";
+       print "<div class=\"page_path\"><b>/" . esc_html($file_name) . "</b><br/></div>\n";
 
-       open my $fd, "-|", "$gitbin/git-rev-list $hash | $gitbin/git-diff-tree -r --stdin \'$file_name\'";
+       open my $fd, "-|", "$gitbin/git-rev-list $hash | $gitbin/git-diff-tree -r --stdin -- \'$file_name\'";
        my $commit;
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -2053,6 +2137,10 @@ sub git_history {
                        if (!%co) {
                                next;
                        }
+                       my $ref = "";
+                       if (defined $refs->{$commit}) {
+                               $ref = " <span class=\"tag\">" . esc_html($refs->{$commit}) . "</span>";
+                       }
                        if ($alternate) {
                                print "<tr class=\"dark\">\n";
                        } else {
@@ -2061,17 +2149,17 @@ sub git_history {
                        $alternate ^= 1;
                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                              "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
-                             "<td>" . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"}, "<b>" .
-                             esc_html(chop_str($co{'title'}, 50)) . "</b>") . "</td>\n" .
+                             "<td>" . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list"}, "<b>" .
+                             esc_html(chop_str($co{'title'}, 50)) . "$ref</b>") . "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;hb=$commit;f=$file_name")}, "blob");
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;hb=$commit;f=$file_name")}, "blob");
                        my $blob = git_get_hash_by_path($hash, $file_name);
                        my $blob_parent = git_get_hash_by_path($commit, $file_name);
                        if (defined $blob && defined $blob_parent && $blob ne $blob_parent) {
                                print " | " .
-                               $cgi->a({-href => esc_url("$my_uri?p=$project;a=blobdiff;h=$blob;hp=$blob_parent;hb=$commit;f=$file_name")},
+                               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blobdiff;h=$blob;hp=$blob_parent;hb=$commit;f=$file_name")},
                                "diff to current");
                        }
                        print "</td>\n" .
@@ -2089,7 +2177,7 @@ sub git_search {
                die_error("", "Text field empty.");
        }
        if (!defined $hash) {
-               $hash = git_read_hash("$project/HEAD");
+               $hash = git_read_head($project);
        }
        my %co = git_read_commit($hash);
        if (!%co) {
@@ -2111,17 +2199,17 @@ sub git_search {
        }
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary;h=$hash")}, "summary") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "shortlog") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary;h=$hash")}, "summary") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
 
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash"), -class => "title"}, esc_html($co{'title'})) . "\n" .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -2152,7 +2240,7 @@ sub git_search {
                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                              "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" . esc_html(chop_str($co{'title'}, 50)) . "</b><br/>");
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" . esc_html(chop_str($co{'title'}, 50)) . "</b><br/>");
                        my $comment = $co{'comment'};
                        foreach my $line (@$comment) {
                                if ($line =~ m/^(.*)($searchtext)(.*)$/i) {
@@ -2167,8 +2255,8 @@ sub git_search {
                        }
                        print "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$co{'id'}")}, "commit") .
-                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
+                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}")}, "commit") .
+                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
                        print "</td>\n" .
                              "</tr>\n";
                }
@@ -2205,18 +2293,18 @@ sub git_search {
                                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                                              "<td><i>" . esc_html(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
                                              "<td>" .
-                                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" .
+                                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" .
                                              esc_html(chop_str($co{'title'}, 50)) . "</b><br/>");
                                        while (my $setref = shift @files) {
                                                my %set = %$setref;
-                                               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=blob;h=$set{'id'};hb=$co{'id'};f=$set{'file'}"), class => "list"},
+                                               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=blob;h=$set{'id'};hb=$co{'id'};f=$set{'file'}"), class => "list"},
                                                      "<span style=\"color:#e00000\">" . esc_html($set{'file'}) . "</span>") .
                                                      "<br/>\n";
                                        }
                                        print "</td>\n" .
                                              "<td class=\"link\">" .
-                                             $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$co{'id'}")}, "commit") .
-                                             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
+                                             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$co{'id'}")}, "commit") .
+                                             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
                                        print "</td>\n" .
                                              "</tr>\n";
                                }
@@ -2230,21 +2318,22 @@ sub git_search {
 }
 
 sub git_shortlog {
-       my $head = git_read_hash("$project/HEAD");
+       my $head = git_read_head($project);
        if (!defined $hash) {
                $hash = $head;
        }
        if (!defined $page) {
                $page = 0;
        }
+       my $refs = read_info_ref();
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary")}, "summary") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary")}, "summary") .
              " | shortlog" .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=log;h=$hash")}, "log") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
-             " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=tree;h=$hash;hb=$hash")}, "tree") . "<br/>\n";
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=tree;h=$hash;hb=$hash")}, "tree") . "<br/>\n";
 
        my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
        open my $fd, "-|", "$gitbin/git-rev-list $limit $hash" or die_error(undef, "Open failed.");
@@ -2252,31 +2341,35 @@ sub git_shortlog {
        close $fd;
 
        if ($hash ne $head || $page) {
-               print $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog")}, "HEAD");
+               print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog")}, "HEAD");
        } else {
                print "HEAD";
        }
        if ($page > 0) {
                print " &sdot; " .
-               $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page-1)), -accesskey => "p", -title => "Alt-p"}, "prev");
+               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash;pg=" . ($page-1)), -accesskey => "p", -title => "Alt-p"}, "prev");
        } else {
                print " &sdot; prev";
        }
        if ($#revlist >= (100 * ($page+1)-1)) {
                print " &sdot; " .
-               $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page+1)), -accesskey => "n", -title => "Alt-n"}, "next");
+               $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash;pg=" . ($page+1)), -accesskey => "n", -title => "Alt-n"}, "next");
        } else {
                print " &sdot; next";
        }
        print "<br/>\n" .
              "</div>\n";
        print "<div>\n" .
-             $cgi->a({-href => esc_url("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
        for (my $i = ($page * 100); $i <= $#revlist; $i++) {
                my $commit = $revlist[$i];
+               my $ref = "";
+               if (defined $refs->{$commit}) {
+                       $ref = " <span class=\"tag\">" . esc_html($refs->{$commit}) . "</span>";
+               }
                my %co = git_read_commit($commit);
                my %ad = date_str($co{'author_epoch'});
                if ($alternate) {
@@ -2289,23 +2382,23 @@ sub git_shortlog {
                      "<td><i>" . esc_html(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
                      "<td>";
                if (length($co{'title_short'}) < length($co{'title'})) {
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
-                             "<b>" . esc_html($co{'title_short'}) . "</b>");
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
+                             "<b>" . esc_html($co{'title_short'}) . "$ref</b>");
                } else {
-                       print $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"},
-                             "<b>" . esc_html($co{'title_short'}) . "</b>");
+                       print $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit"), -class => "list"},
+                             "<b>" . esc_html($co{'title_short'}) . "$ref</b>");
                }
                print "</td>\n" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
-                     " | " . $cgi->a({-href => esc_url("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$commit")}, "commit") .
+                     " | " . $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                      "</td>\n" .
                      "</tr>";
        }
        if ($#revlist >= (100 * ($page+1)-1)) {
                print "<tr>\n" .
                      "<td>" .
-                     $cgi->a({-href => esc_url("$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page+1)), -title => "Alt-n"}, "next") .
+                     $cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=shortlog;h=$hash;pg=" . ($page+1)), -title => "Alt-n"}, "next") .
                      "</td>\n" .
                      "</tr>\n";
        }