public class headerUtility {

/** This is a hack to determine is the page is using SSL or not. If CipherSuite is defined that means it is HTTPS **/
public Boolean hasSSL { get { return ApexPages.currentPage().getHeaders().get('CipherSuite') != null; } }

/** This is used to determine the device type **/
public String userAgent { get { return ApexPages.currentPage().getHeaders().get('USER-AGENT'); } }

/** This will return which Salesforce Server you are on, example: na8.salesforce.com **/
public String currentServer { get {return ApexPages.currentPage().getHeaders().get('X-Salesforce-Forwarded-To'); } }

/** Check the useragent string and assign the device **/
public String deviceType { get; set; } {
   if(userAgent.contains('iPhone')) deviceType = 'iPhone';
   else if(userAgent.contains('iPad')) deviceType = 'iPad';
   else if(userAgent.contains('BlackBerry')) deviceType = 'BlackBerry';
   else deviceType = 'Other';
}

/** You could query a custom object to determine your home page, check the device or simply hard code it here **/
public String returnUrl {get; set; } {

    if (deviceType == 'iPad') {
        returnUrl = '/apex/LbMain';
    } else {
        returnUrl = '/apex/LbMain';

    }
}

public String username {get; set;}
public String password {get; set;}

public PageReference login(){

    String startUrl = System.currentPageReference().getParameters().get('startURL');
    return Site.login( username, password, startURL);
}

/** Check to see if the page is using HTTPS, if not redirect it back to itself with HTTPS **/
public PageReference redirect() {
    if (!hasSSL) {
        string host = ApexPages.currentPage().getHeaders().get('host');
        string url = ApexPages.currentPage().getUrl();
        PageReference homePage = new PageReference('https://'+host+url);
        homePage.setRedirect(true);
        return homePage;
    } else {
        return null;
    }
}

@istest

headerUtility h = new headerUtility();
    h.username = 'Test@hilton.com';
    h.password ='Test123!';

    pagereference pageref = page.LbMain;

    test.setCurrentPage(pageref);

    h.login();
    h.redirect();


}