--- loncom/auth/lonacc.pm	2002/02/26 21:01:33	1.28
+++ loncom/auth/lonacc.pm	2002/06/15 19:45:26	1.33
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Cookie Based Access Handler
 #
-# $Id: lonacc.pm,v 1.28 2002/02/26 21:01:33 albertel Exp $
+# $Id: lonacc.pm,v 1.33 2002/06/15 19:45:26 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -172,7 +172,27 @@ sub handler {
             $requrl=~/\.(\w+)$/;
             if (&Apache::loncommon::fileembstyle($1) eq 'ssi') {
 # ------------------------------------- This is serious stuff, get symb and log
-		my $symb=&Apache::lonnet::symbread;
+		my $query=$r->args;
+                my $symb;
+                if ($query) {
+		    &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
+                }
+                if ($ENV{'form.symb'}) {
+		    $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
+                    if (&Apache::lonnet::symbverify($symb,$requrl)) {
+                      my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
+                      &Apache::lonnet::symblist($map,$murl => $mid,
+                                               'last_known' => $murl);
+		    } else {
+			$r->log_reason('Invalid symb for '.$requrl.': '.
+                                       $symb);
+		        $ENV{'user.error.msg'}=
+                                "$requrl:bre:1:1:Invalid Access";
+  	                return HTTP_NOT_ACCEPTABLE; 
+                    }
+                } else {
+	            $symb=&Apache::lonnet::symbread;
+                }
                 $ENV{'request.symb'}=$symb;
                 &Apache::lonnet::courseacclog($symb);
             } else {