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        if ( $lm and my $mtime = $self->_parse_http_date($lm) ) {
            utime $mtime, $mtime, $file;
        }
    }
    $response->{success} ||= $response->{status} eq '304';
    unlink $tempfile;
    return $response;
}


my %idempotent = map { $_ => 1 } qw/GET HEAD PUT DELETE OPTIONS TRACE/;

sub request {
    my ($self, $method, $url, $args) = @_;
    @_ == 3 || (@_ == 4 && ref $args eq 'HASH')
      or Carp::croak(q/Usage: $http->request(METHOD, URL, [HASHREF])/ . "\n");
    $args ||= {}; # we keep some state in this during _request

    # RFC 2616 Section 8.1.4 mandates a single retry on broken socket
    my $response;
    for ( 0 .. 1 ) {