What is idiomatic use of WWW::Mechanize->new re: default headers?

[CoVAX]

Here's what I've currently doing (snippet):

$mech = WWW::Mechanize->new( autocheck  => 1 );
$mech->cookie_jar($cookie_jar);
$mech->default_header( 'User-Agent'      => 'Mozilla/5.0 <snip>' );
$mech->default_header( 'Referer'         => 'https://www.<snip>' );
$mech->default_header( 'Accept'          => 'application/<snip>' );
$mech->default_header( 'Accept-Language' => 'en-US,en;q=0.5' );
$mech->default_header( 'Accept-Encoding' => 'gzip, deflate' );
$mech->default_header( 'Connection'      => 'keep-alive' );
$mech->show_progress(1);

Since TIMTOWTDI I'm wondering if I should use a hash instead, and pass a reference to it to WWW::Mechanize->new() (how?), or should I call default_header once, passing it a list of key/value pairs?

Your thoughts?

[ikegami]

WWW::Mechanize->new(
   autocheck  => 1,
   cookie_jar => $cookie_jar,
   default_headers => HTTP::Headers->new(
      User_Agent      => 'Mozilla/5.0 <snip>',
      Referer         => 'https://www.<snip>',
      Accept          => 'application/<snip>',
      Accept_Language => 'en-US,en;q=0.5',
      Accept_Encoding => 'gzip, deflate',
      Connection      => 'keep-alive',
   ),
   show_progress => 1,
);

Both the original version and this version look fine to me.

(User_Agent => ... and 'User-Agent' => ... can be used interchangeably in both snippets.)

[CoVAX]

I like your version much better than mine.

Thank you!