如何处理 UsernameNotFoundException spring security

Question

怎么处理UsernameNotFoundException？

在 spring security 中，当找不到用户名时，UserDetailsService实现会抛出一个UsernameNotFoundException. 例如像这样：

   @Override
   @Transactional
   public UserDetails loadUserByUsername(java.lang.String username) throws UsernameNotFoundException {
       logger.info("Load user by username: {}", username);
       User user = userRepository.findUserByUsername(username).orElseThrow(
                   () -> new UsernameNotFoundException("User Not Found with -> username or email: " + username));

       return UserPrinciple.build(user);
   }

我想构建一个自定义的“用户未找到 REST 响应”。我应该如何捕获/处理这个异常？我在 WebSecurityConfigurerAdapter 实现处理程序中实现了一个处理程序方法：

  private static void handleException(HttpServletRequest req, HttpServletResponse rsp, AuthenticationException e)
           throws IOException {
       PrintWriter writer = rsp.getWriter();
       writer.println(new ObjectMapper().writeValueAsString(new AuthResponse("", null, null, null, null,
               "Authentication failed.", false)));
       rsp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
   }

但是这个方法应该等待一个 AuthenticationException异常，并且在运行时异常的类型是java.lang.NullPointerException这样的，所以我无法强制转换或检索初始的UsernameNotFoundException.

任何意见，将不胜感激。许多许多问候:)。

Answer 1

安全层位于控制器和@ControllerAdvice. 因此@ControllerAdvice不是一个选项，因为UsernameNotFoundException这是AuthenticationException在身份验证期间抛出的子类，使您的异常处理程序@ControllerAdvice无法访问。

您只能使用@ControllerAdviceandResponseEntityExceptionHandler如果您将UsernameNotFoundException控制器或从控制器引用的任何其他 bean扔到内部。

这是我的建议 - 您实现AuthenticationFailureHandler并使用它与AuthenticationFilter您用于安全配置的东西一起使用。Spring Boot 安全性带有大约 4 个处理程序接口，用于处理安全相关问题

1. AccessDeniedHandler - 这可以处理用户没有所需角色等问题。

2. AuthenticationEntryPoint - 这可以处理诸如用户在没有适当身份验证元素的情况下尝试访问资源等问题。

3. AuthenticationFailureHandler- 这可以处理诸如找不到用户（即 UsernameNotFoundException）或在身份验证提供程序中引发的其他异常之类的问题。实际上，这会处理AccessDeniedException和未处理的其他身份验证异常AuthenticationEntryPoint。

4. AuthenticationSuccessHandler - 这有助于在用户成功通过身份验证后执行重定向等操作。

有关所有 4 个接口的实现，请参阅以下示例片段。请根据您的口味定制这些。

1. AccessDeniedHandler 执行

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;

@Component
public class RestAccessDeniedHandler implements AccessDeniedHandler {

    @Override
    public void handle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AccessDeniedException e) throws IOException, ServletException {

        Map<String,Object> response = new HashMap<>();
        response.put("status","34");
        response.put("message","unauthorized api access");

        //httpServletResponse.setStatus(HttpServletResponse.SC_FORBIDDEN);
        httpServletResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        OutputStream out = httpServletResponse.getOutputStream();
        ObjectMapper mapper = new ObjectMapper();
        mapper.writerWithDefaultPrettyPrinter().writeValue(out,response);
        //mapper.writeValue(out, response);

        out.flush();
    }
}

2. AuthenticationEntryPoint 执行

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;

@Component
public class RestAuthenticationEntryPoint implements AuthenticationEntryPoint {

    @Override
    public void commence(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException {

        Map<String,Object> response = new HashMap<>();
        response.put("status","34");
        response.put("message","unauthorized access");
        httpServletResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        OutputStream out = httpServletResponse.getOutputStream();
        ObjectMapper mapper = new ObjectMapper();
        mapper.writerWithDefaultPrettyPrinter().writeValue(out, response);
        out.flush();
    }
}

3. AuthenticationFailureHandler 执行

package com.ibiller.webservices.security;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.http.HttpStatus;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;


@Component
public class RestAuthenticationFailureHandler implements AuthenticationFailureHandler
{
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse httpServletResponse,
                                        AuthenticationException ex) throws IOException, ServletException
    {

        Map<String,Object> response = new HashMap<>();
        response.put("status","34");
        response.put("message","unauthorized access");

        httpServletResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        OutputStream out = httpServletResponse.getOutputStream();
        ObjectMapper mapper = new ObjectMapper();
        mapper.writerWithDefaultPrettyPrinter().writeValue(out, response);
        out.flush();
    }
}

4. AuthenticationSuccessHandler 执行

import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component
public class RestSuccessHandler implements AuthenticationSuccessHandler {

    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException {
        Set<String> roles = 
          AuthorityUtils.authorityListToSet(authentication.getAuthorities());
        if (roles.contains("ROLE_ADMIN")) {
            //do something
        }

    }
}

这是WebSecurityConfigurerAdapter将所有内容连接在一起的扩展安全配置。

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpStatus;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.security.web.authentication.AnonymousAuthenticationFilter;
import org.springframework.security.web.authentication.HttpStatusEntryPoint;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.security.web.util.matcher.OrRequestMatcher;
import org.springframework.security.web.util.matcher.RequestMatcher;

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(
        prePostEnabled = true,
        securedEnabled = true,
        jsr250Enabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {


    private static final RequestMatcher PROTECTED_URLS = new OrRequestMatcher(
            new AntPathRequestMatcher("/v1/**"),new AntPathRequestMatcher("/admin/**")
    );

    AuthenticationProvider provider;

    public SecurityConfiguration(final AuthenticationProvider authenticationProvider) {
        super();
        this.provider=authenticationProvider;
    }

    @Override
    protected void configure(final AuthenticationManagerBuilder auth) {
        auth.authenticationProvider(provider);
    }


    @Override
    public void configure(final WebSecurity webSecurity) {
        webSecurity.ignoring().antMatchers("/info/**");//url that will be ignored
    }

    @Override
    public void configure(HttpSecurity http) throws Exception {
        http.sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .exceptionHandling()
                .accessDeniedHandler(accessDeniedHandler())
               .authenticationEntryPoint(authenticationEntryPoint())
                .and()
                .authenticationProvider(provider)
                .addFilterBefore(authenticationFilter(), AnonymousAuthenticationFilter.class)
                .authorizeRequests()
                .antMatchers("/v1/**").hasRole("API")
                .antMatchers("/admin/**").hasAnyRole("SUPER_ADMIN","ADMIN")
                .and()
                .csrf().disable()
                .formLogin().disable()
                .httpBasic().disable()
                .logout().disable();
    }

    @Bean
      AuthenticationFilter authenticationFilter() throws Exception {
        final AuthenticationFilter filter = new AuthenticationFilter(PROTECTED_URLS);
        filter.setAuthenticationManager(authenticationManager());
        filter.setAuthenticationSuccessHandler(successHandler());
        filter.setAuthenticationFailureHandler(authenticationFailureHandler());
        return filter;
    }

    @Bean
    RestAccessDeniedHandler accessDeniedHandler() {
        return new RestAccessDeniedHandler();
    }

    @Bean
    RestAuthenticationEntryPoint authenticationEntryPoint() {
        return new RestAuthenticationEntryPoint();
    }

    @Bean
    RestAuthenticationFailureHandler authenticationFailureHandler(){
        return new RestAuthenticationFailureHandler();
    }

    @Bean
    RestSuccessHandler successHandler(){
        return new RestSuccessHandler();
    }
}