gitweb: fix warnings in PATH_INFO code and add export_ok/strict_export

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 497129aefc7f7e833d697dc9f48342f0e723f9ea..0fb86385c94a72c08fce4bc0b2c54c1461ad2bc6 100755 (executable)
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -189,9 +189,6 @@ do $GITWEB_CONFIG if -e $GITWEB_CONFIG;
 # version of the core git binary
 our $git_version = qx($GIT --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 
-# path to the current git repository
-our $git_dir;
-
 $projects_list ||= $projectroot;
 
 # ======================================================================
@@ -273,30 +270,41 @@ if (defined $searchtext) {
 }
 
 # now read PATH_INFO and use it as alternative to parameters
-our $path_info = $ENV{"PATH_INFO"};
-$path_info =~ s|^/||;
-$path_info =~ s|/$||;
-if (validate_input($path_info) && !defined $project) {
+sub evaluate_path_info {
+       return if defined $project;
+       my $path_info = $ENV{"PATH_INFO"};
+       return if !$path_info;
+       $path_info =~ s,(^/|/$),,gs;
+       $path_info = validate_input($path_info);
+       return if !$path_info;
        $project = $path_info;
        while ($project && !-e "$projectroot/$project/HEAD") {
                $project =~ s,/*[^/]*$,,;
        }
-       if (defined $project) {
-               $project = undef unless $project;
+       if (!$project ||
+           ($export_ok && !-e "$projectroot/$project/$export_ok") ||
+           ($strict_export && !project_in_list($project))) {
+               undef $project;
+               return;
        }
+       # do not change any parameters if an action is given using the query string
+       return if $action;
        if ($path_info =~ m,^$project/([^/]+)/(.+)$,) {
                # we got "project.git/branch/filename"
                $action    ||= "blob_plain";
-               $hash_base ||= $1;
-               $file_name ||= $2;
+               $hash_base ||= validate_input($1);
+               $file_name ||= validate_input($2);
        } elsif ($path_info =~ m,^$project/([^/]+)$,) {
                # we got "project.git/branch"
                $action ||= "shortlog";
-               $hash   ||= $1;
+               $hash   ||= validate_input($1);
        }
 }
+evaluate_path_info();
 
-$git_dir = "$projectroot/$project";
+# path to the current git repository
+our $git_dir;
+$git_dir = "$projectroot/$project" if $project;
 
 # dispatch
 my %actions = (