Dear monks,

I'm trying to get a page, but it's blocked by Cloudflare.

Maybe I need to keep the connection open for 5 seconds, but how do I do this?

I tried to use `keep_alive => 1`, but how to set the time?

use HTTP::Cookies;
my $cookie_jar = HTTP::Cookies->new(
    file => "lwp_cookies.dat",
    autosave => 1,
);

use LWP;
my $browser = LWP::UserAgent->new(
    keep_alive => 1,
);
$browser->cookie_jar($cookie_jar);

my $response = $browser->get('https://bittrex.com/');

if ($response->is_success) {
    print "1:" . $response->content;
}
else {
    print "2:" . $response->status_line;
}
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