--- loncom/lonnet/perl/lonnet.pm	2003/11/01 16:37:21	1.439
+++ loncom/lonnet/perl/lonnet.pm	2003/11/01 18:34:49	1.440
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.439 2003/11/01 16:37:21 www Exp $
+# $Id: lonnet.pm,v 1.440 2003/11/01 18:34:49 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,7 +35,7 @@ use LWP::UserAgent();
 use HTTP::Headers;
 use vars 
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
-   %libserv %pr %prp %metacache %packagetab %titlecache 
+   %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
    %courselogs %accesshash %userrolehash $processmarker $dumpcount 
    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache 
    %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def 
@@ -1042,6 +1042,8 @@ sub getversion {
 
 sub currentversion {
     my $fname=shift;
+    my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
+    if (defined($cached)) { return $result; }
     my $author=$fname;
     $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
     my ($udom,$uname)=split(/\//,$author);
@@ -1053,7 +1055,7 @@ sub currentversion {
     if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
 	return -1;
     }
-    return $answer;
+    return &do_cache(\%resversioncache,$fname,$answer,'resversion');
 }
 
 # ----------------------------- Subscribe to a resource, return URL if possible
@@ -4080,17 +4082,24 @@ sub fixversion {
     if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
     my %bighash;
     my $uri=&clutter($fn);
+    my $key=$ENV{'request.course.id'}.'_'.$uri;
+# is this cached?
+    my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
+				    'courseresversion',600);
+    if (defined($cached)) { return $result; }
+# unfortunately not cached, or expired
     if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
-       &GDBM_READER(),0640)) {
-	if ($bighash{'version_'.$uri}) {
-	    my $version=$bighash{'version_'.$uri};
-	    unless ($version eq 'mostrecent') {
-		$uri=~s/\.(\w+)$/\.$version\.$1/;
-	    }
-	}
-	untie %bighash;
+	    &GDBM_READER(),0640)) {
+ 	if ($bighash{'version_'.$uri}) {
+ 	    my $version=$bighash{'version_'.$uri};
+ 	    unless ($version eq 'mostrecent') {
+ 		$uri=~s/\.(\w+)$/\.$version\.$1/;
+ 	    }
+ 	}
+ 	untie %bighash;
     }
-    return &declutter($uri);
+    return &do_cache
+	(\%courseresversioncache,$key,&declutter($uri),'courseresversion');
 }
 
 sub deversion {
@@ -4425,6 +4434,8 @@ sub goodbye {
 #1.1 only
    &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
    &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
+   &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
+   &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
    &flushcourselogs();
    &logthis("Shutting down");
    return DONE;