如何处理UsernameNotFoundException Spring Security性

Question

如何处理UsernameNotFoundException？

在spring security中，当未找到用户名时，UserDetailsService实现抛出UserNameNotFoundException。例如如下所示：

   @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);
   }

我想建立一个自定义的“用户未找到REST响应”。我应该如何捕获/处理此异常？我在WebSecurityConfigurerAdapter实现中实现了一个处理程序方法处理程序：

  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);
   }

但是该方法应该等待authenticationexception异常，在运行时，该异常的类型是java.lang.NullPointerException，因此我无法强制转换或检索初始的UsernameNotFoundException。

如有任何建议将不胜感激。很多很多问候：）。

Answer 1

安全层位于控制器和@controlleradvice中的任何内容之前。因此，@controlleradvice不是一个选项，因为UsernameNotFoundException是AuthenticationException的子类，它在身份验证过程中引发，使@controlleradvice中的异常处理程序无法访问。

只有在controller或从controller引用的任何其他bean内部抛出UsernameNotFoundException时，才能使用@ControllerAdvice和ResponseEntityExceptionHandler。

我的建议是：实现authenticationfailurehandler并将其与用于安全配置的authenticationfilter一起使用。Spring boot security提供了大约4个处理程序接口来解决与安全相关的问题

>

AccessDeniedHandler-这将处理用户不具有必需角色等问题。

authenticationentrypoint-这将处理用户试图访问没有适当身份验证元素的资源时的问题。

authenticationfailurehandler-这将处理找不到用户（即UsernameNotFoundException)或在身份验证提供程序内部引发的其他异常等问题。实际上，这处理了AccessDeniedException和AuthenticationEntryPoint未处理的其他身份验证异常。

authenticationsuccesshandler-这有助于在成功验证用户身份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。请按您的口味定制这些。

1. AccessDeniedHandler实现

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();
    }
}

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();
    }
}

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();
    }
}

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
        }

    }
}

这是扩展将所有东西连接在一起的WebSecurityConfigurerAdapter的安全配置。

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();
    }
}