AbstractAuthenticationProcessingFilter作用及用法
时间: 2024-05-02 18:21:28 浏览: 14
AbstractAuthenticationProcessingFilter是Spring Security中的一个过滤器,用于处理身份验证请求。它是一个抽象类,需要通过继承来实现具体的身份验证逻辑。
使用AbstractAuthenticationProcessingFilter的步骤如下:
1. 创建一个类继承AbstractAuthenticationProcessingFilter,实现其中的抽象方法attemptAuthentication(),该方法用于处理身份验证请求。
2. 在Spring Security配置文件中配置该过滤器,指定要拦截的URL、成功和失败的处理器等。
3. 在Web应用中使用该过滤器,可以通过注解或XML等方式进行配置。
例如,下面的代码演示了如何使用AbstractAuthenticationProcessingFilter实现基于表单的身份验证:
```java
public class MyAuthenticationFilter extends AbstractAuthenticationProcessingFilter {
public MyAuthenticationFilter() {
super(new AntPathRequestMatcher("/login", "POST"));
}
@Override
public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
String username = request.getParameter("username");
String password = request.getParameter("password");
UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(username, password);
return this.getAuthenticationManager().authenticate(token);
}
}
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private MyAuthenticationSuccessHandler authenticationSuccessHandler;
@Autowired
private MyAuthenticationFailureHandler authenticationFailureHandler;
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().disable()
.authorizeRequests()
.antMatchers("/login").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginProcessingUrl("/login")
.successHandler(authenticationSuccessHandler)
.failureHandler(authenticationFailureHandler);
}
@Bean
public MyAuthenticationFilter authenticationFilter() throws Exception {
MyAuthenticationFilter filter = new MyAuthenticationFilter();
filter.setAuthenticationManager(authenticationManagerBean());
filter.setAuthenticationSuccessHandler(authenticationSuccessHandler);
filter.setAuthenticationFailureHandler(authenticationFailureHandler);
return filter;
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.inMemoryAuthentication()
.withUser("user").password("{noop}password").roles("USER");
}
}
public class MyAuthenticationSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
@Override
public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().println("Authentication success");
}
}
public class MyAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {
@Override
public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
response.getWriter().println("Authentication failure");
}
}
```
上述代码中,MyAuthenticationFilter继承AbstractAuthenticationProcessingFilter,实现attemptAuthentication()方法,处理身份验证请求。
在SecurityConfig中,通过配置http.csrf().disable()禁用了CSRF防护,permitAll()允许登录页面的访问,authenticated()要求其他页面需要身份验证,formLogin()配置了表单登录,并指定了登录处理URL为/login,成功和失败的处理器分别为authenticationSuccessHandler和authenticationFailureHandler。
在authenticationFilter()方法中,通过设置AuthenticationManager、AuthenticationSuccessHandler和AuthenticationFailureHandler来初始化MyAuthenticationFilter。
在configure(AuthenticationManagerBuilder auth)方法中,使用inMemoryAuthentication()方法配置了一个内存中的用户,并指定了用户名、密码和角色。
在MyAuthenticationSuccessHandler和MyAuthenticationFailureHandler中,分别处理了身份验证成功和失败的情况。
最后,可以使用注解或XML等方式将MyAuthenticationFilter配置到Web应用中。