Try utf8::all. It's not universal, because it handles only the core functionality, not libraries. Your use case can be much simplified, though. I strongly suspect you have too much code. Consider:

• HTTP::Response provides both content (returns octets) and decoded_content (returns characters, appropriately decoded from Content-Type header).
• decode_json wants to consume octets.

This means the following DWYW:

use LWP::UserAgent qw();
use JSON::MaybeXS qw(decode_json);
my $ua = LWP::UserAgent->new;
my $res = $ua->get('https://ru.wikipedia.org/w/api.php?action=query&fo
+rmat=json&formatversion=2&list=allusers&auactiveusers&aufrom=%D0%91')
+;
die $res->status_line unless $res->is_success;
my $json_OCTETS = $res->content;
my $all_users_CHARACTERS = decode_json $json_OCTETS;
my $continue_aufrom_CHARACTERS = $all_users_CHARACTERS->{continue}{auf
+rom};
[download]

Your CGI script's templating system should take care to produce UTF-8 encoded octets. If you don't have one, then either one of

• use Encode qw(encode);
  my $continue_aufrom_OCTETS = encode('UTF-8', $continue_aufrom_CHARACTE
  +RS, Encode::FB_CROAK);
  STDOUT->print($continue_aufrom_OCTETS);
  [download]

• binmode STDOUT, ':encoding(UTF-8)';
  STDOUT->print($continue_aufrom_CHARACTERS);
  [download]

is appropriate. The first variant is more robust.

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.