--- loncom/lonnet/perl/lonnet.pm	2007/03/14 23:36:10	1.848
+++ loncom/lonnet/perl/lonnet.pm	2007/03/17 04:11:51	1.849
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.848 2007/03/14 23:36:10 albertel Exp $
+# $Id: lonnet.pm,v 1.849 2007/03/17 04:11:51 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1010,10 +1010,16 @@ my %remembered;
 my %accessed;
 my $kicks=0;
 my $hits=0;
+sub make_key {
+    my ($name,$id) = @_;
+    if (length($id) > 200) { $id=length($id).':'.&Digest::MD5::md5_hex($id); }
+    return &escape($name.':'.$id);
+}
+
 sub devalidate_cache_new {
     my ($name,$id,$debug) = @_;
     if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     $memcache->delete($id);
     delete($remembered{$id});
     delete($accessed{$id});
@@ -1021,7 +1027,7 @@ sub devalidate_cache_new {
 
 sub is_cached_new {
     my ($name,$id,$debug) = @_;
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     if (exists($remembered{$id})) {
 	if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
 	$accessed{$id}=[&gettimeofday()];
@@ -1044,7 +1050,7 @@ sub is_cached_new {
 
 sub do_cache_new {
     my ($name,$id,$value,$time,$debug) = @_;
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     my $setvalue=$value;
     if (!defined($setvalue)) {
 	$setvalue='__undef__';