无法在 Spring 的身份验证过滤器中自动装配服务

问题描述

我正在尝试通过令牌对用户进行身份验证，但是当我尝试在 AuthenticationTokenProcessingFilter 中自动连接我的服务时，我得到空指针异常.因为自动装配的服务为空，我该如何解决这个问题?

I am trying to authenticate user by token, But when i try to auto wire one my services inside the AuthenticationTokenProcessingFilter i get null pointer exception. because autowired service is null , how can i fix this issue ?

我的AuthenticationTokenProcessingFilter 类

@ComponentScan(basePackages = {"com.marketplace"})
public class AuthenticationTokenProcessingFilter extends GenericFilterBean {

    @Autowired
    @Qualifier("myServices")
    private MyServices service;

    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        @SuppressWarnings("unchecked")
        Map<String, String[]> parms = request.getParameterMap();

        if (parms.containsKey("token")) {
            try {
                String strToken = parms.get("token")[0]; // grab the first "token" parameter

                User user = service.getUserByToken(strToken);
                System.out.println("Token: " + strToken);

                DateTime dt = new DateTime();
                DateTimeFormatter fmt = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
                DateTime createdDate = fmt.parseDateTime(strToken);
                Minutes mins = Minutes.minutesBetween(createdDate, dt);


                if (user != null && mins.getMinutes() <= 30) {
                    System.out.println("valid token found");

                    List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
                    authorities.add(new SimpleGrantedAuthority("ROLE_ADMIN"));

                    UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(user.getEmailId(), user.getPassword());
                    token.setDetails(new WebAuthenticationDetails((HttpServletRequest) request));
                    Authentication authentication = new UsernamePasswordAuthenticationToken(user.getEmailId(), user.getPassword(), authorities); //this.authenticationProvider.authenticate(token);

                    SecurityContextHolder.getContext().setAuthentication(authentication);
                }else{
                    System.out.println("invalid token");
                }
            } catch(Exception e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("no token found");
        }
        // continue thru the filter chain
        chain.doFilter(request, response);
    }
}

我尝试在我的 AppConfig

@Bean(name="myServices")
    public MyServices stockService() {
        return new MyServiceImpl();
    }

我的 AppConfig 注释是

My AppConfig Annotations are

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.marketplace")
public class AppConfig extends WebMvcConfigurerAdapter {

推荐答案

我只是通过添加

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

即使我尝试添加显式限定符，我也不确定为什么我们应该这样做.现在代码看起来像

I am unsure why we should do this even when i tried adding explicit qualifier. and now the code looks like

public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

        @SuppressWarnings("unchecked")
        Map<String, String[]> parms = request.getParameterMap();

        if (parms.containsKey("token")) {

这篇关于无法在 Spring 的身份验证过滤器中自动装配服务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！