From ca3d59070b8e470c3c82399f62e8b801db043e89 Mon Sep 17 00:00:00 2001
From: Frédéric Buclin <LpSolit@gmail.com>
Date: Fri, 17 Aug 2012 17:12:06 +0200
Subject: Bug 783386: Removing PATH_INFO prevents Bugzilla from working
 correctly with IIS r=dkl a=LpSolit

---
 Bugzilla/CGI.pm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Bugzilla/CGI.pm b/Bugzilla/CGI.pm
index 09907fb55..ed8540b2a 100644
--- a/Bugzilla/CGI.pm
+++ b/Bugzilla/CGI.pm
@@ -61,11 +61,18 @@ sub new {
     # Moreover, it causes unexpected behaviors, such as totally breaking
     # the rendering of pages.
     my $script = basename($0);
-    if ($self->path_info) {
+    if (my $path_info = $self->path_info) {
         my @whitelist;
         Bugzilla::Hook::process('path_info_whitelist', { whitelist => \@whitelist });
         if (!grep($_ eq $script, @whitelist)) {
-            print $self->redirect($self->url(-path => 0, -query => 1));
+            # IIS includes the full path to the script in PATH_INFO,
+            # so we have to extract the real PATH_INFO from it,
+            # else we will be redirected outside Bugzilla.
+            my $script_name = $self->script_name;
+            $path_info =~ s/^\Q$script_name\E//;
+            if ($path_info) {
+                print $self->redirect($self->url(-path => 0, -query => 1));
+            }
         }
     }
 
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