escape '+' and ' ' in url's

diff --git a/gitweb.cgi b/gitweb.cgi
index 615af99e2caa377112cdcd4691bbc960a6ecac7f..c477bf1bab0e5044a37838aaf2311b830a78c936 100755 (executable)
--- a/gitweb.cgi
+++ b/gitweb.cgi
@@ -78,7 +78,8 @@ if (defined $project) {
                undef $project;
                die_error(undef, "No such project.");
        }
-       $rss_link = "<link rel=\"alternate\" title=\"$project log\" href=\"$my_uri?p=$project;a=rss\" type=\"application/rss+xml\"/>";
+       $rss_link = "<link rel=\"alternate\" title=\"" . esc($project) . " log\" href=\"" .
+                   esc("$my_uri?p=$project;a=rss") . "\" type=\"application/rss+xml\"/>";
        $ENV{'GIT_DIR'} = "$projectroot/$project";
 } else {
        git_project_list();
@@ -206,6 +207,13 @@ if (!defined $action || $action eq "summary") {
        exit;
 }
 
+sub esc {
+       my $str = shift;
+       $str =~ s/ /\+/g;
+       $str =~ s/\+/%2b/g;
+       return $str;
+}
+
 sub git_header_html {
        my $status = shift || "200 OK";
        my $expires = shift;
@@ -286,11 +294,11 @@ a.rss_logo:hover { background-color:#ee5500; }
 EOF
        print "<div class=\"page_header\">\n" .
              "<a href=\"http://www.kernel.org/pub/software/scm/git/docs/\" title=\"git documentation\">" .
-             "<img src=\"$my_uri?a=git-logo.png\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
+             "<img src=\"" . esc("$my_uri?a=git-logo.png") . "\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
              "</a>\n";
-       print $cgi->a({-href => $home_link}, "projects") . " / ";
+       print $cgi->a({-href => esc($home_link)}, "projects") . " / ";
        if (defined $project) {
-               print $cgi->a({-href => "$my_uri?p=$project;a=summary"}, escapeHTML($project));
+               print $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, escapeHTML($project));
                if (defined $action) {
                        print " / $action";
                }
@@ -306,7 +314,7 @@ EOF
                }
                $cgi->param("a", "search");
                $cgi->param("h", $search_hash);
-               print $cgi->startform(-method => "get", -action => "$my_uri") .
+               print $cgi->startform(-method => "get", -action => $my_uri) .
                      "<div class=\"search\">\n" .
                      $cgi->hidden(-name => "p") . "\n" .
                      $cgi->hidden(-name => "a") . "\n" .
@@ -325,9 +333,9 @@ sub git_footer_html {
                if (defined $descr) {
                        print "<div class=\"page_footer_text\">" . escapeHTML($descr) . "</div>\n";
                }
-               print $cgi->a({-href => "$my_uri?p=$project;a=rss", -class => "rss_logo"}, "RSS") . "\n";
+               print $cgi->a({-href => esc("$my_uri?p=$project;a=rss"), -class => "rss_logo"}, "RSS") . "\n";
        } else {
-               print $cgi->a({-href => "$my_uri?a=opml", -class => "rss_logo"}, "OPML") . "\n";
+               print $cgi->a({-href => esc("$my_uri?a=opml"), -class => "rss_logo"}, "OPML") . "\n";
        }
        print "</div>\n" .
              "</body>\n" .
@@ -668,7 +676,7 @@ 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 = $cgi->a({-class => "text", -href => "$my_uri?p=$project;a=commit;h=$hash_text"}, $hash_text);
+                       my $link = $cgi->a({-class => "text", -href => esc("$my_uri?p=$project;a=commit;h=$hash_text")}, $hash_text);
                        $line =~ s/$hash_text/$link/;
                }
        }
@@ -816,25 +824,25 @@ sub git_project_list {
                @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
                print "<th>Project</th>\n";
        } else {
-               print "<th>" . $cgi->a({-class => "header", -href => "$my_uri?o=project"}, "Project") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => esc("$my_uri?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>" . $cgi->a({-class => "header", -href => "$my_uri?o=descr"}, "Description") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => esc("$my_uri?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>" . $cgi->a({-class => "header", -href => "$my_uri?o=owner"}, "Owner") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => esc("$my_uri?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>" . $cgi->a({-class => "header", -href => "$my_uri?o=age"}, "Last Change") . "</th>\n";
+               print "<th>" . $cgi->a({-class => "header", -href => esc("$my_uri?o=age")}, "Last Change") . "</th>\n";
        }
        print "<th></th>\n" .
              "</tr>\n";
@@ -846,7 +854,7 @@ sub git_project_list {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-               print "<td>" . $cgi->a({-href => "$my_uri?p=$pr->{'path'};a=summary", -class => "list"}, escapeHTML($pr->{'path'})) . "</td>\n" .
+               print "<td>" . $cgi->a({-href => esc("$my_uri?p=$pr->{'path'};a=summary"), -class => "list"}, escapeHTML($pr->{'path'})) . "</td>\n" .
                      "<td>$pr->{'descr'}</td>\n" .
                      "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
                my $colored_age;
@@ -859,9 +867,9 @@ sub git_project_list {
                }
                print "<td>$colored_age</td>\n" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => "$my_uri?p=$pr->{'path'};a=summary"}, "summary") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$pr->{'path'};a=shortlog"}, "shortlog") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$pr->{'path'};a=log"}, "log") .
+                     $cgi->a({-href => esc("$my_uri?p=$pr->{'path'};a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$pr->{'path'};a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$pr->{'path'};a=log")}, "log") .
                      "</td>\n" .
                      "</tr>\n";
        }
@@ -960,11 +968,11 @@ sub git_summary {
        git_header_html();
        print "<div class=\"page_nav\">\n" .
              "summary".
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$head"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$head"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree"}, "tree") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
        print "<div class=\"title\">&nbsp;</div>\n";
@@ -977,7 +985,7 @@ sub git_summary {
        my (@revlist) = map { chomp; $_ } <$fd>;
        close $fd;
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=shortlog", -class => "title"}, "shortlog") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog"), -class => "title"}, "shortlog") .
              "</div>\n";
        my $i = 16;
        print "<table cellspacing=\"0\">\n";
@@ -996,20 +1004,20 @@ sub git_summary {
                              "<td><i>" . escapeHTML(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
                              "<td>";
                        if (length($co{'title_short'}) < length($co{'title'})) {
-                               print $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "list", -title => "$co{'title'}"},
+                               print $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
                                      "<b>" . escapeHTML($co{'title_short'}) . "</b>");
                        } else {
-                               print $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "list"},
+                               print $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"},
                                      "<b>" . escapeHTML($co{'title'}) . "</b>");
                        }
                        print "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit"}, "commit") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$commit"}, "commitdiff") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                              "</td>\n" .
                              "</tr>";
                } else {
-                       print "<td>" . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "...") . "</td>\n" .
+                       print "<td>" . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "...") . "</td>\n" .
                        "</tr>";
                        last;
                }
@@ -1019,7 +1027,7 @@ sub git_summary {
        my $taglist = git_read_refs("refs/tags");
        if (defined @$taglist) {
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=tags", -class => "title"}, "tags") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=tags"), -class => "title"}, "tags") .
                      "</div>\n";
                my $i = 16;
                print "<table cellspacing=\"0\">\n";
@@ -1040,27 +1048,27 @@ sub git_summary {
                        if ($i-- > 0) {
                                print "<td><i>$tag{'age'}</i></td>\n" .
                                      "<td>" .
-                                     $cgi->a({-href => "$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}", -class => "list"},
+                                     $cgi->a({-href => esc("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
                                      "<b>" . escapeHTML($tag{'name'}) . "</b>") .
                                      "</td>\n" .
                                      "<td>";
                                if (defined($comment)) {
-                                     print $cgi->a({-class => "list", -href => "$my_uri?p=$project;a=tag;h=$tag{'id'}"}, $comment);
+                                     print $cgi->a({-class => "list", -href => esc("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, $comment);
                                }
                                print "</td>\n" .
                                      "<td class=\"link\">";
                                if ($tag{'type'} eq "tag") {
-                                     print $cgi->a({-href => "$my_uri?p=$project;a=tag;h=$tag{'id'}"}, "tag") . " | ";
+                                     print $cgi->a({-href => esc("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
                                }
-                               print $cgi->a({-href => "$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"}, $tag{'reftype'});
+                               print $cgi->a({-href => esc("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
                                if ($tag{'reftype'} eq "commit") {
-                                     print " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}"}, "shortlog") .
-                                           " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$tag{'refid'}"}, "log");
+                                     print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                           " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$tag{'refid'}")}, "log");
                                }
                                print "</td>\n" .
                                      "</tr>";
                        } else {
-                               print "<td>" . $cgi->a({-href => "$my_uri?p=$project;a=tags"}, "...") . "</td>\n" .
+                               print "<td>" . $cgi->a({-href => esc("$my_uri?p=$project;a=tags")}, "...") . "</td>\n" .
                                "</tr>";
                                last;
                        }
@@ -1071,7 +1079,7 @@ sub git_summary {
        my $headlist = git_read_refs("refs/heads");
        if (defined @$headlist) {
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=heads", -class => "title"}, "heads") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=heads"), -class => "title"}, "heads") .
                      "</div>\n";
                my $i = 16;
                print "<table cellspacing=\"0\">\n";
@@ -1087,16 +1095,16 @@ sub git_summary {
                        if ($i-- > 0) {
                                print "<td><i>$tag{'age'}</i></td>\n" .
                                      "<td>" .
-                                     $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}", -class => "list"},
+                                     $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"},
                                      "<b>" . escapeHTML($tag{'name'}) . "</b>") .
                                      "</td>\n" .
                                      "<td class=\"link\">" .
-                                     $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}"}, "shortlog") .
-                                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$tag{'name'}"}, "log") .
+                                     $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$tag{'name'}")}, "log") .
                                      "</td>\n" .
                                      "</tr>";
                        } else {
-                               print "<td>" . $cgi->a({-href => "$my_uri?p=$project;a=heads"}, "...") . "</td>\n" .
+                               print "<td>" . $cgi->a({-href => esc("$my_uri?p=$project;a=heads")}, "...") . "</td>\n" .
                                "</tr>";
                                last;
                        }
@@ -1110,24 +1118,24 @@ sub git_tag {
        my $head = git_read_hash("$project/HEAD");
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$head"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$head"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;hb=$head"}, "tree") . "<br/>\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my %tag = git_read_tag($hash);
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash", -class => "title"}, escapeHTML($tag{'name'})) . "\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, escapeHTML($tag{'name'})) . "\n" .
              "</div>\n";
        print "<div class=\"title_text\">\n" .
              "<table cellspacing=\"0\">\n" .
              "<tr>\n" .
              "<td>object</td>\n" .
-             "<td>" . $cgi->a({-class => "list", -href => "$my_uri?p=$project;a=$tag{'type'};h=$tag{'object'}"}, $tag{'object'}) . "</td>\n" .
-             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?p=$project;a=$tag{'type'};h=$tag{'object'}"}, $tag{'type'}) . "</td>\n" .
+             "<td>" . $cgi->a({-class => "list", -href => esc("$my_uri?p=$project;a=$tag{'type'};h=$tag{'object'}")}, $tag{'object'}) . "</td>\n" .
+             "<td class=\"link\">" . $cgi->a({-href => esc("$my_uri?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'});
@@ -1149,17 +1157,17 @@ sub git_tags {
        my $head = git_read_hash("$project/HEAD");
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$head"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$head"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;hb=$head"}, "tree") . "<br/>\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my $taglist = git_read_refs("refs/tags");
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary", -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -1179,22 +1187,22 @@ sub git_tags {
                        $alternate ^= 1;
                        print "<td><i>$tag{'age'}</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}", -class => "list"},
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"), -class => "list"},
                              "<b>" . escapeHTML($tag{'name'}) . "</b>") .
                              "</td>\n" .
                              "<td>";
                        if (defined($comment)) {
-                             print $cgi->a({-class => "list", -href => "$my_uri?p=$project;a=tag;h=$tag{'id'}"}, $comment);
+                             print $cgi->a({-class => "list", -href => esc("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, $comment);
                        }
                        print "</td>\n" .
                              "<td class=\"link\">";
                        if ($tag{'type'} eq "tag") {
-                             print $cgi->a({-href => "$my_uri?p=$project;a=tag;h=$tag{'id'}"}, "tag") . " | ";
+                             print $cgi->a({-href => esc("$my_uri?p=$project;a=tag;h=$tag{'id'}")}, "tag") . " | ";
                        }
-                       print $cgi->a({-href => "$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}"}, $tag{'reftype'});
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=$tag{'reftype'};h=$tag{'refid'}")}, $tag{'reftype'});
                        if ($tag{'reftype'} eq "commit") {
-                             print " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}"}, "shortlog") .
-                                   " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$tag{'refid'}"}, "log");
+                             print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                                   " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$tag{'refid'}")}, "log");
                        }
                        print "</td>\n" .
                              "</tr>";
@@ -1208,17 +1216,17 @@ sub git_heads {
        my $head = git_read_hash("$project/HEAD");
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$head"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$head"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;hb=$head"}, "tree") . "<br/>\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$head")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$head")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;hb=$head")}, "tree") . "<br/>\n" .
              "<br/>\n" .
              "</div>\n";
        my $taglist = git_read_refs("refs/heads");
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary", -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -1233,11 +1241,11 @@ sub git_heads {
                        $alternate ^= 1;
                        print "<td><i>$tag{'age'}</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}", -class => "list"}, "<b>" . escapeHTML($tag{'name'}) . "</b>") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}"), -class => "list"}, "<b>" . escapeHTML($tag{'name'}) . "</b>") .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$tag{'name'}"}, "shortlog") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$tag{'name'}"}, "log") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$tag{'name'}")}, "shortlog") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$tag{'name'}")}, "log") .
                              "</td>\n" .
                              "</tr>";
                }
@@ -1285,20 +1293,20 @@ sub git_blob {
        git_header_html();
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash_base"}, "commitdiff") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base"}, "tree") . "<br/>\n";
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") . "<br/>\n";
                if (defined $file_name) {
-                       print $cgi->a({-href => "$my_uri?p=$project;a=blob_plain;h=$hash;f=$file_name"}, "plain") . "<br/>\n";
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=blob_plain;h=$hash;f=$file_name")}, "plain") . "<br/>\n";
                } else {
-                       print $cgi->a({-href => "$my_uri?p=$project;a=blob_plain;h=$hash"}, "plain") . "<br/>\n";
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=blob_plain;h=$hash")}, "plain") . "<br/>\n";
                }
                print "</div>\n".
                       "<div>" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base", -class => "title"}, escapeHTML($co{'title'})) .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, escapeHTML($co{'title'})) .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n" .
@@ -1361,16 +1369,16 @@ sub git_tree {
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                $base_key = ";hb=$hash_base";
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash_base"}, "shortlog") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash_base"}, "log") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash_base"}, "commitdiff") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$hash_base")}, "shortlog") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash_base")}, "log") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
                      " | tree" .
                      "<br/><br/>\n" .
                      "</div>\n";
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n";
@@ -1403,18 +1411,18 @@ sub git_tree {
                print "<td style=\"font-family:monospace\">" . mode_str($t_mode) . "</td>\n";
                if ($t_type eq "blob") {
                        print "<td class=\"list\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key, -class => "list"}, $t_name) .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key), -class => "list"}, $t_name) .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key}, "blob") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=history;h=$hash_base" . $file_key}, "history") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$t_hash" . $base_key . $file_key)}, "blob") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=history;h=$hash_base" . $file_key)}, "history") .
                              "</td>\n";
                } elsif ($t_type eq "tree") {
                        print "<td class=\"list\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key}, $t_name) .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key)}, $t_name) .
                              "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key}, "tree") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$t_hash" . $base_key . $file_key)}, "tree") .
                              "</td>\n";
                }
                print "</tr>\n";
@@ -1523,12 +1531,12 @@ sub git_log {
        }
        git_header_html();
        print "<div class=\"page_nav\">\n";
-       print $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash"}, "shortlog") .
+       print $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
              " | log" .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$hash;hb=$hash"}, "tree") . "<br/>\n";
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?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.");
@@ -1536,19 +1544,19 @@ sub git_log {
        close $fd;
 
        if ($hash ne $head || $page) {
-               print $cgi->a({-href => "$my_uri?p=$project;a=log"}, "HEAD");
+               print $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "HEAD");
        } else {
                print "HEAD";
        }
        if ($page > 0) {
                print " &sdot; " .
-               $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash;pg=" . ($page-1), -accesskey => "p", -title => "Alt-p"}, "prev");
+               $cgi->a({-href => esc("$my_uri?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; " .
-               $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash;pg=" . ($page+1), -accesskey => "n", -title => "Alt-n"}, "next");
+               $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash;pg=" . ($page+1)), -accesskey => "n", -title => "Alt-n"}, "next");
        } else {
                print " &sdot; next";
        }
@@ -1556,7 +1564,7 @@ sub git_log {
              "</div>\n";
        if (!@revlist) {
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=summary", -class => "title"}, "&nbsp;") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
                      "</div>\n";
                my %co = git_read_commit($hash);
                print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
@@ -1567,13 +1575,13 @@ sub git_log {
                next if !%co;
                my %ad = date_str($co{'author_epoch'});
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "title"},
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "title"},
                      "<span class=\"age\">$co{'age_string'}</span>" . escapeHTML($co{'title'})) . "\n" .
                      "</div>\n";
                print "<div class=\"title_text\">\n" .
                      "<div class=\"log_link\">\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$commit"}, "commitdiff") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                      "<br/>\n" .
                      "</div>\n" .
                      "<i>" . escapeHTML($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
@@ -1629,22 +1637,22 @@ sub git_commit {
        }
        git_header_html(undef, $expires);
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash"}, "log") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash")}, "log") .
              " | commit";
        if (defined $co{'parent'}) {
-               print " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash"}, "commitdiff");
+               print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff");
        }
-       print " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"}, "tree") . "\n" .
+       print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "\n" .
              "<br/><br/></div>\n";
        if (defined $co{'parent'}) {
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
                      "</div>\n";
        } else {
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
                      "</div>\n";
        }
        print "<div class=\"title_text\">\n" .
@@ -1665,19 +1673,19 @@ sub git_commit {
        print "<tr>" .
              "<td>tree</td>" .
              "<td style=\"font-family:monospace\">" .
-             $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash", class => "list"}, $co{'tree'}) .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"), class => "list"}, $co{'tree'}) .
              "</td>" .
-             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"}, "tree") .
+             "<td class=\"link\">" . $cgi->a({-href => esc("$my_uri?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\">" . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$par", class => "list"}, $par) . "</td>" .
+                     "<td style=\"font-family:monospace\">" . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$par"), class => "list"}, $par) . "</td>" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$par"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash;hp=$par"}, "commitdiff") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$par")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash;hp=$par")}, "commitdiff") .
                      "</td>" .
                      "</tr>\n";
        }
@@ -1738,16 +1746,16 @@ sub git_commit {
                                $mode_chng = sprintf(" with mode: %04o", (oct $to_mode) & 0777);
                        }
                        print "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file", -class => "list"}, escapeHTML($file)) . "</td>\n" .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, escapeHTML($file)) . "</td>\n" .
                              "<td><span style=\"color: #008000;\">[new " . file_type($to_mode) . "$mode_chng]</span></td>\n" .
-                             "<td class=\"link\">" . $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"}, "blob") . "</td>\n";
+                             "<td class=\"link\">" . $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob") . "</td>\n";
                } elsif ($status eq "D") {
                        print "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file", -class => "list"}, escapeHTML($file)) . "</td>\n" .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file"), -class => "list"}, escapeHTML($file)) . "</td>\n" .
                              "<td><span style=\"color: #c00000;\">[deleted " . file_type($from_mode). "]</span></td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file"}, "blob") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=history;h=$hash;f=$file"}, "history") .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, "blob") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=history;h=$hash;f=$file")}, "history") .
                              "</td>\n"
                } elsif ($status eq "M" || $status eq "T") {
                        my $mode_chnge = "";
@@ -1767,18 +1775,18 @@ sub git_commit {
                        }
                        print "<td>";
                        if ($to_id ne $from_id) {
-                               print $cgi->a({-href => "$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file", -class => "list"}, escapeHTML($file));
+                               print $cgi->a({-href => esc("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file"), -class => "list"}, escapeHTML($file));
                        } else {
-                               print $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file", -class => "list"}, escapeHTML($file));
+                               print $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"), -class => "list"}, escapeHTML($file));
                        }
                        print "</td>\n" .
                              "<td>$mode_chnge</td>\n" .
                              "<td class=\"link\">";
-                       print $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"}, "blob");
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file")}, "blob");
                        if ($to_id ne $from_id) {
-                               print " | " . $cgi->a({-href => "$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file"}, "diff");
+                               print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$file")}, "diff");
                        }
-                       print " | " . $cgi->a({-href => "$my_uri?p=$project;a=history;h=$hash;f=$file"}, "history") . "\n";
+                       print " | " . $cgi->a({-href => esc("$my_uri?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;
@@ -1787,14 +1795,14 @@ sub git_commit {
                                $mode_chng = sprintf(", mode: %04o", (oct $to_mode) & 0777);
                        }
                        print "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file", -class => "list"}, escapeHTML($to_file)) . "</td>\n" .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file"), -class => "list"}, escapeHTML($to_file)) . "</td>\n" .
                              "<td><span style=\"color: #777777;\">[moved from " .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$from_file", -class => "list"}, escapeHTML($from_file)) .
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$from_file"), -class => "list"}, escapeHTML($from_file)) .
                              " with " . (int $similarity) . "% similarity$mode_chng]</span></td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file"}, "blob");
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$to_file")}, "blob");
                        if ($to_id ne $from_id) {
-                               print " | " . $cgi->a({-href => "$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file"}, "diff");
+                               print " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=blobdiff;h=$to_id;hp=$from_id;hb=$hash;f=$to_file")}, "diff");
                        }
                        print "</td>\n";
                }
@@ -1809,17 +1817,17 @@ sub git_blobdiff {
        git_header_html();
        if (defined $hash_base && (my %co = git_read_commit($hash_base))) {
                print "<div class=\"page_nav\">\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash_base"}, "commitdiff") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base"}, "tree") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash_base")}, "commitdiff") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash_base")}, "tree") .
                      "<br/>\n";
-               print $cgi->a({-href => "$my_uri?p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent"}, "plain") .
+               print $cgi->a({-href => esc("$my_uri?p=$project;a=blobdiff_plain;h=$hash;hp=$hash_parent")}, "plain") .
                      "</div>\n";
                print "<div>\n" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash_base", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash_base"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
                      "</div>\n";
        } else {
                print "<div class=\"page_nav\">\n" .
@@ -1831,9 +1839,9 @@ sub git_blobdiff {
        }
        print "<div class=\"page_body\">\n" .
              "<div class=\"diff_info\">blob:" .
-             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$hash_parent;hb=$hash_base;f=$file_name"}, $hash_parent) .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$hash_parent;hb=$hash_base;f=$file_name")}, $hash_parent) .
              " -> blob:" .
-             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$hash;hb=$hash_base;f=$file_name"}, $hash) .
+             $cgi->a({-href => esc("$my_uri?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>";
@@ -1866,16 +1874,16 @@ sub git_commitdiff {
        }
        git_header_html(undef, $expires);
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash"}, "commit") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$hash")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
              " | commitdiff" .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"}, "tree") . "<br/>\n";
-       print $cgi->a({-href => "$my_uri?p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent"}, "plain") . "\n" .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") . "<br/>\n";
+       print $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff_plain;h=$hash;hp=$hash_parent")}, "plain") . "\n" .
              "</div>\n";
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
              "</div>\n";
        print "<div class=\"page_body\">\n";
        my $comment = $co{'comment'};
@@ -1914,20 +1922,20 @@ sub git_commitdiff {
                my $file = $6;
                if ($status eq "A") {
                        print "<div class=\"diff_info\">" .  file_type($to_mode) . ":" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"}, $to_id) . "(new)" .
+                             $cgi->a({-href => esc("$my_uri?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) . ":" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file"}, $from_id) . "(deleted)" .
+                             $cgi->a({-href => esc("$my_uri?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) . ":" . $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file"}, $from_id) .
+                                     file_type($from_mode) . ":" . $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$from_id;hb=$hash;f=$file")}, $from_id) .
                                      " -> " .
-                                     file_type($to_mode) . ":" . $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$to_id;hb=$hash;f=$file"}, $to_id);
+                                     file_type($to_mode) . ":" . $cgi->a({-href => esc("$my_uri?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");
                        }
@@ -2008,16 +2016,16 @@ sub git_history {
        }
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"}, "tree") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
              "</div>\n";
        print "<div class=\"page_path\"><b>/$file_name</b><br/></div>\n";
 
@@ -2043,17 +2051,17 @@ sub git_history {
                        $alternate ^= 1;
                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                              "<td><i>" . escapeHTML(chop_str($co{'author_name'}, 15, 3)) . "</i></td>\n" .
-                             "<td>" . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "list"}, "<b>" .
+                             "<td>" . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"}, "<b>" .
                              escapeHTML(chop_str($co{'title'}, 50)) . "</b>") . "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit"}, "commit") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$commit"}, "commitdiff") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=blob;hb=$commit;f=$file_name"}, "blob");
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
+                             " | " . $cgi->a({-href => esc("$my_uri?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 " | " .
-                               $cgi->a({-href => "$my_uri?p=$project;a=blobdiff;h=$blob;hp=$blob_parent;hb=$commit;f=$file_name"},
+                               $cgi->a({-href => esc("$my_uri?p=$project;a=blobdiff;h=$blob;hp=$blob_parent;hb=$commit;f=$file_name")},
                                "diff to current");
                        }
                        print "</td>\n" .
@@ -2093,17 +2101,17 @@ sub git_search {
        }
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary;h=$hash"}, "summary") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "shortlog") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash"}, "tree") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary;h=$hash")}, "summary") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "shortlog") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$hash")}, "tree") .
              "<br/><br/>\n" .
              "</div>\n";
 
        print "<div>\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash", -class => "title"}, escapeHTML($co{'title'})) . "\n" .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash"), -class => "title"}, escapeHTML($co{'title'})) . "\n" .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -2134,7 +2142,7 @@ sub git_search {
                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                              "<td><i>" . escapeHTML(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
                              "<td>" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$co{'id'}", -class => "list"}, "<b>" . escapeHTML(chop_str($co{'title'}, 50)) . "</b><br/>");
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" . escapeHTML(chop_str($co{'title'}, 50)) . "</b><br/>");
                        my $comment = $co{'comment'};
                        foreach my $line (@$comment) {
                                if ($line =~ m/^(.*)($searchtext)(.*)$/i) {
@@ -2149,8 +2157,8 @@ sub git_search {
                        }
                        print "</td>\n" .
                              "<td class=\"link\">" .
-                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$co{'id'}"}, "commit") .
-                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}"}, "tree");
+                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$co{'id'}")}, "commit") .
+                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
                        print "</td>\n" .
                              "</tr>\n";
                }
@@ -2187,18 +2195,18 @@ sub git_search {
                                        print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
                                              "<td><i>" . escapeHTML(chop_str($co{'author_name'}, 15, 5)) . "</i></td>\n" .
                                              "<td>" .
-                                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$co{'id'}", -class => "list"}, "<b>" .
+                                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$co{'id'}"), -class => "list"}, "<b>" .
                                              escapeHTML(chop_str($co{'title'}, 50)) . "</b><br/>");
                                        while (my $setref = shift @files) {
                                                my %set = %$setref;
-                                               print $cgi->a({-href => "$my_uri?p=$project;a=blob;h=$set{'id'};hb=$co{'id'};f=$set{'file'}", class => "list"},
+                                               print $cgi->a({-href => esc("$my_uri?p=$project;a=blob;h=$set{'id'};hb=$co{'id'};f=$set{'file'}"), class => "list"},
                                                      "<span style=\"color:#e00000\">" . escapeHTML($set{'file'}) . "</span>") .
                                                      "<br/>\n";
                                        }
                                        print "</td>\n" .
                                              "<td class=\"link\">" .
-                                             $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$co{'id'}"}, "commit") .
-                                             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}"}, "tree");
+                                             $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$co{'id'}")}, "commit") .
+                                             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=tree;h=$co{'tree'};hb=$co{'id'}")}, "tree");
                                        print "</td>\n" .
                                              "</tr>\n";
                                }
@@ -2221,12 +2229,12 @@ sub git_shortlog {
        }
        git_header_html();
        print "<div class=\"page_nav\">\n" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary"}, "summary") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary")}, "summary") .
              " | shortlog" .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=log;h=$hash"}, "log") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$hash"}, "commit") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$hash"}, "commitdiff") .
-             " | " . $cgi->a({-href => "$my_uri?p=$project;a=tree;h=$hash;hb=$hash"}, "tree") . "<br/>\n";
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=log;h=$hash")}, "log") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$hash")}, "commit") .
+             " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$hash")}, "commitdiff") .
+             " | " . $cgi->a({-href => esc("$my_uri?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.");
@@ -2234,26 +2242,26 @@ sub git_shortlog {
        close $fd;
 
        if ($hash ne $head || $page) {
-               print $cgi->a({-href => "$my_uri?p=$project;a=shortlog"}, "HEAD");
+               print $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog")}, "HEAD");
        } else {
                print "HEAD";
        }
        if ($page > 0) {
                print " &sdot; " .
-               $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page-1), -accesskey => "p", -title => "Alt-p"}, "prev");
+               $cgi->a({-href => esc("$my_uri?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; " .
-               $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page+1), -accesskey => "n", -title => "Alt-n"}, "next");
+               $cgi->a({-href => esc("$my_uri?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" .
-             $cgi->a({-href => "$my_uri?p=$project;a=summary", -class => "title"}, "&nbsp;") .
+             $cgi->a({-href => esc("$my_uri?p=$project;a=summary"), -class => "title"}, "&nbsp;") .
              "</div>\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 0;
@@ -2271,23 +2279,23 @@ sub git_shortlog {
                      "<td><i>" . escapeHTML(chop_str($co{'author_name'}, 10)) . "</i></td>\n" .
                      "<td>";
                if (length($co{'title_short'}) < length($co{'title'})) {
-                       print $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "list", -title => "$co{'title'}"},
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "list", -title => "$co{'title'}"},
                              "<b>" . escapeHTML($co{'title_short'}) . "</b>");
                } else {
-                       print $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit", -class => "list"},
+                       print $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit"), -class => "list"},
                              "<b>" . escapeHTML($co{'title_short'}) . "</b>");
                }
                print "</td>\n" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=commit;h=$commit"}, "commit") .
-                     " | " . $cgi->a({-href => "$my_uri?p=$project;a=commitdiff;h=$commit"}, "commitdiff") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=commit;h=$commit")}, "commit") .
+                     " | " . $cgi->a({-href => esc("$my_uri?p=$project;a=commitdiff;h=$commit")}, "commitdiff") .
                      "</td>\n" .
                      "</tr>";
        }
        if ($#revlist >= (100 * ($page+1)-1)) {
                print "<tr>\n" .
                      "<td>" .
-                     $cgi->a({-href => "$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page+1), -title => "Alt-n"}, "next") .
+                     $cgi->a({-href => esc("$my_uri?p=$project;a=shortlog;h=$hash;pg=" . ($page+1)), -title => "Alt-n"}, "next") .
                      "</td>\n" .
                      "</tr>\n";
        }