# The LON-CAPA Homework handler # Guy Albertelli # 11/30 Gerd Kortemeyer package Apache::lonhomework; use strict; use Apache::style; use Apache::lonxml; use Apache::lonnet; use Apache::inputtags; use Apache::structuretags; use Apache::response; sub get_target { if ( $ENV{'request.state'} eq "published") { if ( defined $ENV{'form.submit'}) { return ('grade', 'web'); } else { return ('web'); } } elsif ($ENV{'request.state'} eq "construct") { if ( defined $ENV{'form.preview'}) { if ( defined $ENV{'form.submit'}) { return ('grade', 'web'); } else { return ('web'); } } else { return ('edit'); } } return (); } sub setup_vars { my ($target) = @_; return ';' # return ';$external::target='.$target.';'; } sub send_header { my ($request)= @_; $request->print(&Apache::lontexconvert::header()); $ENV{'request.uri'}=$request->uri; # $request->print('
'); } sub send_footer { my ($request)= @_; # $request->print('
'); $request->print(&Apache::lontexconvert::footer()); } sub handler { my $request=$_[0]; # if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; } my (@targets) = &get_target(); if ($ENV{'browser.mathml'}) { $request->content_type('text/xml'); } else { $request->content_type('text/html'); } $request->send_http_header; return 'OK' if $request->header_only; &Apache::lonhomework::send_header($request); foreach my $target (@targets) { my $file=&Apache::lonnet::filelocation("",$request->uri); my $problem=&Apache::lonnet::getfile($file); if ($problem == -1) { &Apache::lonxml::error(" Unable to find $file"); $problem=''; } my %mystyle; my $result = ''; &Apache::inputtags::initialize_inputtags; %Apache::lonhomework::results=(); %Apache::lonhomework::history=&Apache::lonnet::restore; #ignore error conditions my ($temp)=keys %Apache::lonhomework::history ; if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } if ($target eq 'grade') { my $resultkey; foreach $resultkey (sort keys %Apache::lonhomework::history) { &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::history{$resultkey}"); } &Apache::lonxml::debug("\n
restored values^
\n"); } my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm'); if ($default == -1) { &Apache::lonxml::error("Unable to find default_homework.lcpm"); $default=''; } if ( $target eq 'grade') { $Apache::lonxml::textredirection = 0; } else { $Apache::lonxml::textredirection = 1; } $result = &Apache::lonxml::xmlparse($target, $problem, $default.&setup_vars($target),%mystyle); #$request->print("Result follows:"); $request->print($result); #$request->print(":Result ends"); if ($target eq 'grade') { my $resultkey; foreach $resultkey (sort keys %Apache::lonhomework::results) { &Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}"); } &Apache::lonxml::debug("\n
storing values^
\n"); } my ($temp) = keys %Apache::lonhomework::results; if ( $temp ne '' ) { &Apache::lonxml::debug("Store return message:".&Apache::lonnet::cstore(%Apache::lonhomework::results)); } } &Apache::lonhomework::send_footer($request); return 'OK'; } 1; __END__