--- loncom/interface/loncommon.pm	2002/01/04 15:16:35	1.23
+++ loncom/interface/loncommon.pm	2002/03/28 22:15:56	1.30
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.23 2002/01/04 15:16:35 www Exp $
+# $Id: loncommon.pm,v 1.30 2002/03/28 22:15:56 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -358,12 +358,17 @@ sub get_student_answers {
 }
 
 sub get_unprocessed_cgi {
-  my ($query)= @_;
+  my ($query,$possible_names)= @_;
+  # $Apache::lonxml::debug=1;
   foreach (split(/&/,$query)) {
     my ($name, $value) = split(/=/,$_);
-    $value =~ tr/+/ /;
-    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
-    if (!defined($ENV{'form.'.$name})) { $ENV{'form.'.$name}=$value; }
+    $name = &Apache::lonnet::unescape($name);
+    if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
+      $value =~ tr/+/ /;
+      $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+      &Apache::lonxml::debug("Seting :$name: to :$value:");
+      unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
+    }
   }
 }
 
@@ -379,10 +384,27 @@ sub cacheheader {
 sub no_cache {
   my ($r) = @_;
   unless ($ENV{'request.method'} eq 'GET') { return ''; }
-  my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
+  #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
   $r->no_cache(1);
   $r->header_out("Pragma" => "no-cache");
-  $r->header_out("Expires" => $date);
+  #$r->header_out("Expires" => $date);
+}
+
+sub add_to_env {
+  my ($name,$value)=@_;
+  if (defined($ENV{$name})) {
+    if (ref($ENV{$name})) {
+      #already have multiple values
+      push(@{ $ENV{$name} },$value);
+    } else {
+      #first time seeing multiple values, convert hash entry to an arrayref
+      my $first=$ENV{$name};
+      undef($ENV{$name});
+      push(@{ $ENV{$name} },$first,$value);
+    }
+  } else {
+    $ENV{$name}=$value;
+  }
 }
 1;
 __END__;
@@ -488,6 +510,12 @@ cacheheader() : returns cache-controllin
 
 nocache() : specifies header code to not have cache
 
+=item *
+
+add_to_env($name,$value) : adds $name to the %ENV hash with value
+$value, if $name already exists, the entry is converted to an array
+reference and $value is added to the array.
+
 =back
 
 =cut