Reproduce a matter of decoding parameter from a post query.

mojo-post-params.pl

use utf8; #script encoded in utf8 without bom
use Mojolicious::Lite; 
use Data::HexDump;
{
	require Mojolicious;
	say "perl $^V, Mojolicious: v", Mojolicious->VERSION, ", ", `chcp` ;
}

post '/' => sub{
		my $self = shift;
		my $params = $self->req->params->to_hash;
		app->log->debug("received data:\n", HexDump( $params->{a} ) );
		use Devel::Peek;
		Dump( $params->{a} );
		$self->render( text => "ok for '$params->{a}'" );
	};

if(my $pid = fork()){
	use Mojo::UserAgent;
	my $t = Mojo::UserAgent->new;
	#simulate front-end query
	my $tx  = $t->post('http://127.0.0.1:3042/' => 
							{ 'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8' }, 
							form => {  a => 'été'} 
						);
	my $res = $tx->res->body;
	say "result:\n", HexDump($res);
	use Devel::Peek;
	Dump( $res );
	kill 'SIGKILL', $pid;
	exit(0);
}

app->start(qw(daemon --listen http://*:3042 ));

Everything is okay with that script (but the use of Data::HexDump).

http://stackoverflow.com/questions/30478043/perl-internal-representation-of-unicode-stringform-parameter-decoded-unexpectedl