Hello Guys

I am writing blog to develop auto login logic in liferay. Liferay provide auto login functionality, So we can login by screenName, userId and email address parameter's.

We need to create hook to implement AutoLogin interface, so follow below steps to create auto login in liferay.

Step 1: Create CustomAutoLogin.java and put below code :

public class CustomAutoLogin implements AutoLogin {
    public String[] login(HttpServletRequest request,
            HttpServletResponse response) throws AutoLoginException {

        String emailAddress = request.getParameter("emailAddress");// login by email address
        if (emailAddress == null || emailAddress.isEmpty())
            return null;

        try {
            long companyId = PortalUtil.getCompanyId(request);
            User user = UserLocalServiceUtil.getUserByEmailAddress(companyId,
                    emailAddress);
            return new String[] { String.valueOf(user.getUserId()),
                    user.getPassword(),
                    String.valueOf(user.isPasswordEncrypted()) };
        } catch (Exception e) {
            return null;
        }

    }
} 

Step 2: Create hook :

<?xml version="1.0"?>
<!DOCTYPE hook PUBLIC "-//Liferay//DTD Hook 6.1.0//EN" "http://www.liferay.com/dtd/liferay-hook_6_1_0.dtd">

<hook>
    <portal-properties>portal.properties</portal-properties>
</hook>

Put below property in portal.properties :

auto.login.hooks=com.bhagwan.CustomAutoLogin