--- loncom/auth/lonacc.pm	2000/10/30 22:41:55	1.11
+++ loncom/auth/lonacc.pm	2000/10/31 19:26:21	1.12
@@ -39,7 +39,24 @@ sub handler {
             $ENV{'user.environment'} = "$lonidsdir/$handle.id";
             $ENV{'request.state'}    = "published";
             $ENV{'request.filename'} = $r->filename;
-            $ENV{'HTTP_REFERER'}     = $r->header_in('Referer');
+
+# ---- Figure out referer, first from HTTP_REFERER, then cache, then wild guess
+
+            my $referer='';
+            if ($referer=$r->header_in('Referer')) {
+               $ENV{'HTTP_REFERER'}=$referer;
+	    } else {
+	       $ENV{'HTTP_REFERER'}=$ENV{'httpref.'.$requrl};
+               unless($ENV{'HTTP_REFERER'}) {
+		   my $pathpart=$requrl;
+                   $pathpart=~s/\/[\w\.]*$//;
+                   map {
+		       if ($_=~/^httpref.$pathpart/) {
+			   $ENV{'HTTP_REFERER'}=$ENV{$_};
+                       }
+                   } keys %ENV;
+               }
+	    }
 
 # -------------------------------------------------------- Load POST parameters