无法在Spring中的身份验证过滤器中自动装入服务 [英] Unable to autowire the service inside my authentication filter in Spring

问题描述

我试图通过令牌来验证用户，但是当我尝试在 AuthenticationTokenProcessingFilter 中自动连线我的服务时，我得到空指针异常。 因为autowired服务为空，我该如何解决这个问题？

My AuthenticationTokenProcessingFilter class

  @ComponentScan（basePackages = {com.marketplace}）
 public class AuthenticationTokenProcessingFilter extends GenericFilterBean {
 
 @Autowired 
 @Qualifier（myServices）
私人MyServices服务; 
 
 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]; //获取第一个token参数
 
 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）; （用户！= null&& mins.getMinutes（）<= 30）{
 System.out.println（找到有效的令牌）; 
 
 
 
 
列表<授权授权> authority = new ArrayList< GrantedAuthority>（）; 
 authorities.add（new SimpleGrantedAuthority（ROLE_ADMIN））; 
 
 UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken（user.getEmailId（），user.getPassword（））; 
 token.setDetails（新的WebAuthenticationDetails（（HttpServletRequest）请求））; 
 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）; 
} 
 //继续通过过滤链
 chain.doFilter（request，response）; 
 
 
 $ / code> 

我试着在我的 AppConfig

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

我的AppConfig批注是

  @Configuration 
 @EnableWebMvc 
 @ComponentScan（basePackages =com.marketplace）
公共类AppConfig扩展WebMvcConfigurerAdapter {
  

解决方案

我只是通过添加

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext（this）;

我不确定为什么我们应该这样做，即使当我尝试添加显式限定符。现在代码看起来像

  public void doFilter（ServletRequest请求，ServletResponse响应，
 FilterChain链）throws IOException， ServletException {
 
 SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext（this）; 
 
 @SuppressWarnings（unchecked）
 Map< String，String []> parms = request.getParameterMap（）; 
 
 if（parms.containsKey（token））{
  

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 ?

My AuthenticationTokenProcessingFilter class

@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);
    }
}

I Tried adding follwing in my AppConfig

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

My AppConfig Annotations are

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

解决方案

I just made it work by adding

SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);

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")) {

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