Hi everybody,
let mi introduce my new plugin http://search.cpan.org/~koceasy/Dancer-Plugin-FakeCGI-0.21/.
This plugin can easily run CGI methods or Perl CGI files under Dancer such as this simple example:

# Run specified method in given package

any '/test_1'
 => sub {
    fake_cgi_method("test_CGI", "test");
    fake_cgi_as_string;
};

# Run specified Perl file
any '/test_3' => sub {
    fake_cgi_file("test_CGI_file.pl");
    fake_cgi_as_string;
};

This example is append in this plugin in directory examples.
I wrote this plugin to easily move CGI script to use in Dancer. The idea is similar as running CGI under mod_perl. Than every package is after first run cached in memory or can be cached with method fake_cgi_compile.
In next version i want to add emulation CGI function header() and cookie(). If someone know how can be easily implemented, than send me email.
In future i would like to extend IO::Capture(such as not save some captured text.... )

Bye Igor