Spring安全性从更深层访问UserDetailsS​​ervice [英] Spring security access UserDetailsService from deeper layers

问题描述

我有以下UserDetailsS​​ervice实现。

到目前为止，身份验证过程运行良好。

如何存储我的MyUser bean（ 在会话中成功登录），以便我可以在我的应用程序的其他区域访问它

I have the following UserDetailsService implementation.
The authentication process is working great so far.
How do I store my "MyUser bean" (that logged in successfully ) in the "session" so i can get access to it in other areas in my application

谢谢。

@Transactional(readOnly = true)
public class CustomUserDetailsService implements UserDetailsService {


    private EmployeesApi employeesApi = new EmployeesApi();

    /**
     * Retrieves a user record containing the user's credentials and access. 
     */
    public UserDetails loadUserByUsername(String userName)
            throws UsernameNotFoundException, DataAccessException {

        // Declare a null Spring User
        UserDetails user = null;

        try {


            MyUser employee = employeesApi.getByUserName(userName);



            user =  new User(
                    employee.getUserName(), 
                    employee.getPassword().toLowerCase(),
                    true,
                    true,
                    true,
                    true,
                    getAuthorities(1) );

        } catch (Exception e) {
            logger.error("Error in retrieving user");
            throw new UsernameNotFoundException("Error in retrieving user");
        }


    }
    ....

推荐答案

Spring Security已经为您在会话中存储了 UserDetails 经过身份验证的用户。

Spring Security already stores UserDetails of authenticated user in session for you.

因此，在会话中存储 MyUser 的最简单方法是实现包含的自定义 UserDetails 对 MyUser 的引用：

So, the easiest way to store MyUser in session is to implement a custom UserDetails that contains a reference to MyUser:

public class MyUserDetails extends User {
    private MyUser myUser;
    public MyUserDetails(..., MyUser myUser) {
        super(...);
        this.myUser = myUser;
    }
    public MyUser getMyUser() {
        return myUser;
    }
    ...
}

并从你的 UserDetailsS​​ervice ：

MyUser employee = employeesApi.getByUserName(userName);
user =  new MyUserDetails(..., myUser);

然后您可以通过安全轻松访问 MyUser context：

Then you can easily access MyUser via security context:

MyUser myUser = ((MyUserDetails) SecurityContextHolder
    .getContext().getAuthentication().getPrincipal()).getMyUser();

在Spring MVC控制器中：

In Spring MVC controller:

@RequestMapping(...)
public ModelAndView someController(..., Authentication auth) {
    MyUser myUser = ((MyUserDetails) auth.getPrincipal()).getMyUser();
    ...
}

在JSP中：

<security:authentication var = "myUser" property="principal.myUser" />

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