My client has set up a ssl domain at https://secure.domain.com and the general site is on the normal address of http://www.domain.com.

My question is how do I change the baseURL rather than just the protocol?

I'm hoping this is going to be a quick one. I've been looking around for a bit and haven't been able to find much, at least not what I was searching for :(

Any help would be greatly appreciated.

I have worked it out in a round about way.

I created an extra function along the lines as one shown here http://doc.silverstripe.org/ssl?s[]=secure&s[]=pages

	public function init() {

		parent::init();
		
		if (!Director::isDev()) {
	        if ( !$this->SecurePage()) {
	            $this->force_HTTP();
	        } else {
	        	$this->force_HTTPS();
	        }
		}
       }

    // if we are on https, redirect to the http version of this page's URL
    function force_HTTP() {
        $page_url    = Director::absoluteURL( $_SERVER['REQUEST_URI'] );
        $https_regex = '{^https:}';
        if ( preg_match( $https_regex, $page_url ) ) {
            $new_url = preg_replace( $https_regex, 'http:', $page_url );
            Director::redirect('http://www.domain.com'.$this->Link());
        }
    }
    function force_HTTPS() {
        $page_url    = Director::absoluteURL( $_SERVER['REQUEST_URI'] );
        $https_regex = '{^http:}';
        if ( preg_match( $https_regex, $page_url ) ) {
            $new_url = preg_replace( $https_regex, 'https:', $page_url );
            Director::redirect('https://secure.domain.com'.$this->Link());
        }
    }

    function SecurePage() {
        return false;
    }

It may not be 100% right but it appears to work the way I need it to.

If anyone has any suggestions to improve would be greatly appreciated.