+sub generate{
+ my ($self, $frm, $env) = @_;
+ my $r = Plack::Request->new($env);
+ my ($problem, $format, $contest, $private, $prog) = map {scalar $r->param($_)} 'problem', 'prog_format', 'contest', 'private', 'source_code';
+ my $upload = $r->upload('prog');
+ if (defined $upload) {
+ my $temp = read_file $upload->path;
+ $prog = $temp if $temp
+ }
+ die if defined $contest && $contest !~ /^\w+$/ ;
+ die if defined $contest && (time > contest_end $contest);
+ return reply 'A required parameter was not supplied' if grep { !defined } $problem, $format, $prog;