How to correctly display messages in console? - perl

Question

I use mojolicious application. When I do logging all if fine, except when I run application under morbo I see text like:
$app->log->info('тест лога');
[Sat Oct 6 15:22:43 2018] [info] �е�� лога
here is some problem with utf8.
What should I do that messages will be correctly displayed?
My terminal have support for utf8. I run Linux Mint v19.3
Here is how messages looks which come from script:
Test terminal:

Answer 1

Don't use the following when using Mojo::Log to write to STDERR:
binmode STDERR, ':encoding(UTF-8)';
Mojo::Log explicitly encodes everything it logs using UTF-8, even when writing to STDERR.
sub append {
my ($self, $msg) = #_;
return unless my $handle = $self->handle;
flock $handle, LOCK_EX;
$handle->print(encode('UTF-8', $msg)) or croak "Can't write to log: $!";
flock $handle, LOCK_UN;
}
When using STDERR as the log output (the default), this conflicts with the well-established practice of adding an encoding layer to STD*. In such a circumstance, double-encoding occurs.
One must therefore avoid doing
binmode STDERR, ':encoding(UTF-8)';
Note that this is done as part of
use open ':std', ':encoding(UTF-8)';

Answer 2

Try to run following code sample in your system. The test confirmed with correct UTF-8 output in terminal
#!/usr/bin/env perl
use Mojolicious::Lite -signatures;
get '/' => sub ($c) {
$c->render(text => 'Hello World!');
};
app->log->info('тест лога');
app->start;
Run as morbo test.pl produces following output
:u99257852:~/work/perl/mojo$ morbo ./test.pl
Web application available at http://127.0.0.1:3000
[2020-10-31 13:33:57.42056] [83940] [info] тест лога
[2020-10-31 13:35:16.72465] [83940] [debug] [hga9Tgyy] GET "/"
[2020-10-31 13:35:16.72528] [83940] [debug] [hga9Tgyy] Routing to a callback
[2020-10-31 13:35:16.72574] [83940] [debug] [hga9Tgyy] 200 OK (0.001078s, 927.644/s)
(uiserver):u99257852:~/work/perl/mojo$
Tested locally with nc localhost 3000
(uiserver):u99257852:~$ nc localhost 3000
GET / HTTP/1.1
HTTP/1.1 200 OK
Date: Sat, 31 Oct 2020 17:35:16 GMT
Server: Mojolicious (Perl)
Content-Type: text/html;charset=UTF-8
Content-Length: 12
Hello World!
Output of uname -a
(uiserver):u99257852:~/work/perl/mojo$ uname -a
Linux infongwp-us19 4.4.223-icpu-044 #2 SMP Sun May 10 11:26:44 UTC 2020 x86_64 GNU/Linux
(uiserver):u99257852:~/work/perl/mojo$
Bash is user's shell configured with ~/.bashrc with following settings to support UTF-8
export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8: