--- loncom/lonnet/perl/lonnet.pm	2007/09/05 17:37:51	1.910
+++ loncom/lonnet/perl/lonnet.pm	2007/10/01 23:54:54	1.910.2.4
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.910 2007/09/05 17:37:51 albertel Exp $
+# $Id: lonnet.pm,v 1.910.2.4 2007/10/01 23:54:54 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -320,7 +320,10 @@ sub convert_and_load_session_env {
     my ($lonidsdir,$handle)=@_;
     my @profile;
     {
-	open(my $idf,"$lonidsdir/$handle.id");
+	my $opened = open(my $idf,'+<',"$lonidsdir/$handle.id");
+	if (!$opened) {
+	    return 0;
+	}
 	flock($idf,LOCK_SH);
 	@profile=<$idf>;
 	close($idf);
@@ -359,7 +362,10 @@ sub transfer_profile_to_env {
 
     my $convert;
     {
-    	open(my $idf,"$lonidsdir/$handle.id");
+    	my $opened = open(my $idf,'+<',"$lonidsdir/$handle.id");
+	if (!$opened) {
+	    return;
+	}
 	flock($idf,LOCK_SH);
 	if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
 		&GDBM_READER(),0640)) {
@@ -425,8 +431,9 @@ sub appenv {
             $env{$key}=$newenv{$key};
         }
     }
-    open(my $env_file,$env{'user.environment'});
-    if (&timed_flock($env_file,LOCK_EX)
+    my $opened = open(my $env_file,'+<',$env{'user.environment'});
+    if ($opened
+	&& &timed_flock($env_file,LOCK_EX)
 	&&
 	tie(my %disk_env,'GDBM_File',$env{'user.environment'},
 	    (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
@@ -446,16 +453,17 @@ sub delenv {
                 "Attempt to delete from environment ".$delthis);
         return 'error';
     }
-    open(my $env_file,$env{'user.environment'});
-    if (&timed_flock($env_file,LOCK_EX)
+    my $opened = open(my $env_file,'+<',$env{'user.environment'});
+    if ($opened
+	&& &timed_flock($env_file,LOCK_EX)
 	&&
 	tie(my %disk_env,'GDBM_File',$env{'user.environment'},
 	    (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
 	foreach my $key (keys(%disk_env)) {
 	    if ($key=~/^$delthis/) { 
-                delete($env{$key});
-                delete($disk_env{$key});
-            }
+		delete($env{$key});
+		delete($disk_env{$key});
+	    }
 	}
 	untie(%disk_env);
     }
@@ -582,6 +590,27 @@ sub compare_server_load {
     }
     return ($spare_server,$lowest_load);
 }
+
+# --------------------------- ask offload servers if user already has a session
+sub find_existing_session {
+    my ($udom,$uname) = @_;
+    foreach my $try_server (@{ $spareid{'primary'} },
+			    @{ $spareid{'default'} }) {
+	return $try_server if (&has_user_session($try_server, $udom, $uname));
+    }
+    return;
+}
+
+# -------------------------------- ask if server already has a session for user
+sub has_user_session {
+    my ($lonid,$udom,$uname) = @_;
+    my $result = &reply(join(':','userhassession',
+			     map {&escape($_)} ($udom,$uname)),$lonid);
+    return 1 if ($result eq 'ok');
+
+    return 0;
+}
+
 # --------------------------------------------- Try to change a user's password
 
 sub changepass {
@@ -7735,6 +7764,9 @@ sub hreflocation {
 	$file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
 	    -/uploaded/$1/$2/-x;
     }
+    if ($file=~ m{^/userfiles/}) {
+	$file =~ s{^/userfiles/}{/uploaded/};
+    }
     return $file;
 }