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- debug messages only appear for user debug
- empty responses are ignored
- try counts don't appear once the problem is correct

    1: # The LON-CAPA Homework handler
    2: # Guy Albertelli
    3: # 11/30 Gerd Kortemeyer
    4: 
    5: package Apache::lonhomework;
    6: use strict;
    7: use Apache::style;
    8: use Apache::lonxml;
    9: use Apache::lonnet;
   10: use Apache::inputtags;
   11: use Apache::structuretags;
   12: use Apache::response;
   13: 
   14: 
   15: sub get_target {
   16:   if ( $ENV{'request.state'} eq "published") {
   17:     if ( defined $ENV{'form.submit'}) {
   18:       return ('grade', 'web');
   19:     } else {
   20:       return ('web');
   21:     }
   22:   } elsif ($ENV{'request.state'} eq "construct") {
   23:     if ( defined $ENV{'form.preview'}) {
   24:       if ( defined $ENV{'form.submit'}) {
   25: 	return ('grade', 'web');
   26:       } else {
   27: 	return ('web');
   28:       }
   29:     } else {
   30:       return ('edit');
   31:     }
   32:   }
   33:   return ();
   34: }
   35: 
   36: sub setup_vars {
   37:   my ($target) = @_;
   38:   return ';'
   39: #  return ';$external::target='.$target.';';
   40: }
   41: 
   42: sub send_header {
   43:   my ($request)= @_;
   44:   $request->print(&Apache::lontexconvert::header());
   45:   $ENV{'request.uri'}=$request->uri;
   46: #  $request->print('<form name='.$ENV{'form.request.prefix'}.'lonhomework method="POST" action="'.$request->uri.'">');
   47: }
   48: 
   49: sub send_footer {
   50:   my ($request)= @_;
   51: #  $request->print('</form>');
   52:   $request->print(&Apache::lontexconvert::footer());
   53: }
   54: 
   55: sub handler {
   56:   my $request=$_[0];
   57: 
   58: #  if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; }
   59:   
   60:   my (@targets) = &get_target();
   61: 
   62:   if ($ENV{'browser.mathml'}) {
   63:     $request->content_type('text/xml');
   64:   } else {
   65:     $request->content_type('text/html');
   66:   }
   67:   $request->send_http_header;
   68:   return 'OK' if $request->header_only;
   69:   
   70:   &Apache::lonhomework::send_header($request);
   71:   
   72:   foreach my $target (@targets) {
   73:     my $file=&Apache::lonnet::filelocation("",$request->uri);
   74:     my $problem=&Apache::lonnet::getfile($file);
   75:     if ($problem == -1) {
   76:       &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
   77:       $problem='';
   78:     }
   79:     
   80:     my %mystyle;
   81:     my $result = '';
   82:     &Apache::inputtags::initialize_inputtags;
   83:     %Apache::lonhomework::results=();
   84:     %Apache::lonhomework::history=&Apache::lonnet::restore;
   85:     #ignore error conditions
   86:     my ($temp)=keys %Apache::lonhomework::history ;
   87:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
   88:     
   89:     if ($target eq 'grade') {
   90:       my $resultkey;
   91:       foreach $resultkey (sort keys %Apache::lonhomework::history) {
   92: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}");
   93:       }
   94:       &Apache::lonxml::debug("\n<br>restored values^</br>\n");
   95:     }
   96:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
   97:     if ($default == -1) {
   98:       &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
   99:       $default='';
  100:     }
  101:     if ( $target eq 'grade') { 
  102:       $Apache::lonxml::textredirection = 0; 
  103:     } else {
  104:       $Apache::lonxml::textredirection = 1; 
  105:     }
  106:     $result = &Apache::lonxml::xmlparse($target, $problem,
  107: 			$default.&setup_vars($target),%mystyle);
  108: 
  109:     #$request->print("Result follows:");
  110:     $request->print($result);
  111:     #$request->print(":Result ends");
  112:     if ($target eq 'grade') {
  113:       my $resultkey;
  114:       foreach $resultkey (sort keys %Apache::lonhomework::results) {
  115: 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
  116:       }
  117:       &Apache::lonxml::debug("\n<br>storing values^</br>\n");
  118:     }
  119:     
  120:     my ($temp) = keys %Apache::lonhomework::results;
  121:     if ( $temp ne '' ) {
  122:       &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results));
  123:     }
  124:   }
  125:   &Apache::lonhomework::send_footer($request);
  126:   
  127:   return 'OK';
  128: 
  129: }
  130: 
  131: 1;
  132: __END__