--- loncom/homework/lonhomework.pm	2003/04/03 20:05:21	1.118
+++ loncom/homework/lonhomework.pm	2003/05/13 01:56:32	1.126
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
 #
-# $Id: lonhomework.pm,v 1.118 2003/04/03 20:05:21 albertel Exp $
+# $Id: lonhomework.pm,v 1.126 2003/05/13 01:56:32 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -50,6 +50,7 @@ use Apache::essayresponse();
 use Apache::externalresponse();
 use Apache::rankresponse();
 use Apache::matchresponse();
+#use Apache::chemresponse();
 use Apache::Constants qw(:common);
 use HTML::Entities();
 use Apache::loncommon();
@@ -60,12 +61,13 @@ BEGIN {
 }
 
 sub get_target {
-  if ( $ENV{'request.state'} eq "published") {
+  if (($ENV{'request.state'} eq "published") ||
+      ($ENV{'request.state'} eq "uploaded")) {
     if ( defined($ENV{'form.grade_target'}  ) 
 	 && ($ENV{'form.grade_target'} eq 'tex')) {
       return ($ENV{'form.grade_target'});
     } elsif ( defined($ENV{'form.grade_target'}  ) 
-	 && ($Apache::lonhomework::viewgrades == 'F' )) {
+	 && ($Apache::lonhomework::viewgrades eq 'F' )) {
       return ($ENV{'form.grade_target'});
     }
  
@@ -207,12 +209,16 @@ sub check_access {
     $datemsg = "was due on $lastdate, and answers will be available on $date";
   }
   if ($status eq 'CAN_ANSWER') {
-    #check #tries
+    #check #tries, and if correct.
     my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
     my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
     if ( $tries eq '' ) { $tries = '0'; }
     if ( $maxtries eq '' ) { $maxtries = '2'; } 
     if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 
+    if($Apache::lonhomework::history{"resource.$id.solved"}=~/^correct/
+      && lc($Apache::lonhomework::problemstatus) ne 'no') {
+	$status = 'CANNOT_ANSWER';
+    }
   }
 
   if (($status ne 'CLOSED') && ($Apache::lonhomework::type eq 'exam') &&
@@ -285,18 +291,19 @@ sub setuppermissions {
 }
 
 sub setupheader {
-  my $request=$_[0];
-  if ($ENV{'browser.mathml'}) {
-    $request->content_type('text/xml');
-  } else {
-    $request->content_type('text/html');
-  }
-  if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
-    &Apache::loncommon::no_cache($request);
-  }
-  $request->send_http_header;
-  return OK if $request->header_only;
-  return ''
+    my $request=$_[0];
+    if ($ENV{'browser.mathml'}) {
+	$request->content_type('text/xml');
+    } else {
+	$request->content_type('text/html');
+    }
+    $request->content_encoding('UTF-8');
+    if (!$Apache::lonxml::debug && ($ENV{'REQUEST_METHOD'} eq 'GET')) {
+	&Apache::loncommon::no_cache($request);
+    }
+    $request->send_http_header;
+    return OK if $request->header_only;
+    return ''
 }
 
 sub handle_save_or_undo {
@@ -600,7 +607,6 @@ sub handler {
   #my $t0 = [&gettimeofday()];
   my $request=$_[0];
 
-#  if ( $ENV{'user.name'} eq 'albertel' ) {$Apache::lonxml::debug=1;}
   $Apache::lonxml::debug=$ENV{'user.debug'};
 
   if (&setupheader($request)) { return OK; }