Grails, spring-security-core plugin：使用email登录

1. Implement the first requirement – Add an email address property to the user domain

This is really simple, just add the property to the domain class

package org.customauth
 
class CustomUser {
 
    String username
    String password
    String email
    boolean enabled
    boolean accountExpired
 
    // *******
    // the rest of the generated class contents
    // *******
}

2. Implement the second requirement – Authenticate using the username or the email

In order to implement this requirement, I will have to implement a new UserDetailsService

package org.customauth
 
import org.codehaus.groovy.grails.plugins.springsecurity.GrailsUser
import org.codehaus.groovy.grails.plugins.springsecurity.GrailsUserDetailsService
import org.codehaus.groovy.grails.plugins.springsecurity.SpringSecurityUtils
import org.springframework.security.core.authority.GrantedAuthorityImpl
import org.springframework.security.core.userdetails.UserDetails
import org.springframework.security.core.userdetails.UsernameNotFoundException
 
class CustomUserDetailsService implements GrailsUserDetailsService {
 
    static final List NO_ROLES = [new GrantedAuthorityImpl(SpringSecurityUtils.NO_ROLE)]
 
    UserDetails loadUserByUsername(String username, boolean loadRoles) 
    throws UsernameNotFoundException {
        return loadUserByUsername(username)
    }
 
    UserDetails loadUserByUsername(String username) 
    throws UsernameNotFoundException {
 
        CustomUser.withTransaction { status ->
            CustomUser user = CustomUser.findByUsernameOrEmail(username, username)
            if (!user)
                throw new UsernameNotFoundException('User not found', username)
 
            def authorities = user.authorities.collect {
                new GrantedAuthorityImpl(it.authority)}
 
            return new GrailsUser(user.username, user.password, user.enabled, 
            !user.accountExpired, !user.passwordExpired, !user.accountLocked,
                authorities ?: NO_ROLES, user.id)
        }
    }
}

3. With the custom service in place, I need to register it in grails-app/conf/spring/resources.groovy by adding

beans = {
    userDetailsService(org.customauth.CustomUserDetailsService)
}

Reference: http://omarello.com/2010/09/grails-customize-authentication/