Setting HTTP 401 header from a component.

Hi All,

Whats the right way to set a 401 header ?

Im currently using

        if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
            $this->controller->header('HTTP/1.1 401 Unauthorized');
            $this->controller->header('WWW-Authenticate: Digest realm="'.$realm.'",qop="auth",nonce="'.$realm.'",opaque="'.$realm.'"');
            return $this->setStatus(ERRDIGEST);
        }

Which fills my debug.log with

2013-07-06 14:09:46 Notice: Notice (8): Undefined offset: 1 in [/opt/hd-1983/lib/Cake/Network/CakeResponse.php, line 526]
Trace:
CakeResponse::header() - CORE/Cake/Network/CakeResponse.php, line 526
Controller::header() - CORE/Cake/Controller/Controller.php, line 821
[snip...]

Cakephp : 2.2.3

Thanks.

Cheers
Richard

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