RememberMeAuthenticationFilter过滤器对应的类路径为 org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter 看主要的doFilter方法
- public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
- throws IOException, ServletException {
- HttpServletRequest request = (HttpServletRequest) req;
- HttpServletResponse response = (HttpServletResponse) res;
-
-
- if (SecurityContextHolder.getContext().getAuthentication() == null) {
-
- Authentication rememberMeAuth = rememberMeServices.autoLogin(request, response);
-
- if (rememberMeAuth != null) {
-
- try {
-
-
-
-
-
-
-
- rememberMeAuth = authenticationManager.authenticate(rememberMeAuth);
-
-
- SecurityContextHolder.getContext().setAuthentication(rememberMeAuth);
-
- onSuccessfulAuthentication(request, response, rememberMeAuth);
-
- if (this.eventPublisher != null) {
- eventPublisher.publishEvent(new InteractiveAuthenticationSuccessEvent(
- SecurityContextHolder.getContext().getAuthentication(), this.getClass()));
- }
- } catch (AuthenticationException authenticationException) {
- ……
- }
- }
-
- chain.doFilter(request, response);
- } else {
- ……
- chain.doFilter(request, response);
- }
- }
下面看具体的autoLogin执行过程。 autoLogin是由RememberMeServices接口定义的方法,那么在RememberMeAuthenticationFilter类中的RememberMeServices实例也是通过解析http标签时注入到Filter中的。具体解析过程代码就不分析了。 如果remember-me标签有data-source-ref或token-repository-ref属性,RememberMeServices接口实现类为 PersistentTokenBasedRememberMeServices 其他情况下,没有设置services-ref属性,RememberMeServices接口实现类为 TokenBasedRememberMeServices 这两个实现类都继承了AbstractRememberMeServices抽象类
而autoLogin是AbstractRememberMeServices类完成的,看源码
- public final Authentication autoLogin(HttpServletRequest request, HttpServletResponse response) {
-
-
-
-
-
- String rememberMeCookie = extractRememberMeCookie(request);
-
- if (rememberMeCookie == null) {
- return null;
- }
-
- logger.debug("Remember-me cookie detected");
-
- UserDetails user = null;
-
- try {
-
-
-
- String[] cookieTokens = decodeCookie(rememberMeCookie);
-
- user = processAutoLoginCookie(cookieTokens, request, response);
-
- userDetailsChecker.check(user);
-
- logger.debug("Remember-me cookie accepted");
-
-
- return createSuccessfulAuthentication(request, user);
- } catch (CookieTheftException cte) {
- cancelCookie(request, response);
- throw cte;
- } catch (UsernameNotFoundException noUser) {
- logger.debug("Remember-me login was valid but corresponding user not found.", noUser);
- } catch (InvalidCookieException invalidCookie) {
- logger.debug("Invalid remember-me cookie: " + invalidCookie.getMessage());
- } catch (AccountStatusException statusInvalid) {
- logger.debug("Invalid UserDetails: " + statusInvalid.getMessage());
- } catch (RememberMeAuthenticationException e) {
- logger.debug(e.getMessage());
- }
-
- cancelCookie(request, response);
- return null;
- }
继续跟踪processAutoLoginCookie方法,该方法由具体子类实现,下面的代码从 PersistentTokenBasedRememberMeServices中截取
- protected UserDetails processAutoLoginCookie(String[] cookieTokens, HttpServletRequest request, HttpServletResponse response) {
-
- if (cookieTokens.length != 2) {
- throw new InvalidCookieException("Cookie token did not contain " + 2 +
- " tokens, but contained '" + Arrays.asList(cookieTokens) + "'");
- }
- final String presentedSeries = cookieTokens[0];
- final String presentedToken = cookieTokens[1];
-
-
- PersistentRememberMeToken token = tokenRepository.getTokenForSeries(presentedSeries);
-
-
- PersistentRememberMeToken newToken = new PersistentRememberMeToken(token.getUsername(),
- token.getSeries(), generateTokenData(), new Date());
-
- try {
-
- tokenRepository.updateToken(newToken.getSeries(), newToken.getTokenValue(), newToken.getDate());
-
- addCookie(newToken, request, response);
- } catch (DataAccessException e) {
- logger.error("Failed to update token: ", e);
- throw new RememberMeAuthenticationException("Autologin failed due to data access problem");
- }
-
-
- UserDetails user = getUserDetailsService().loadUserByUsername(token.getUsername());
-
- return user;
- }
这里需要注意的是getUserDetailsService方法返回的userDetailsService变量从哪里注入进来的呢?通过解析remember标签构造bean时注入的么?不是的,进一步观察remember标签解析代码
- public BeanDefinition parse(Element element, ParserContext pc) {
-
- boolean isPersistent = dataSourceSet | tokenRepoSet;
-
- if (isPersistent) {
- Object tokenRepo;
- services = new RootBeanDefinition(PersistentTokenBasedRememberMeServices.class);
-
- if (tokenRepoSet) {
- tokenRepo = new RuntimeBeanReference(tokenRepository);
- } else {
-
- tokenRepo = new RootBeanDefinition(JdbcTokenRepositoryImpl.class);
- ((BeanDefinition)tokenRepo).getPropertyValues().addPropertyValue("dataSource",
- new RuntimeBeanReference(dataSource));
- }
-
- services.getPropertyValues().addPropertyValue("tokenRepository", tokenRepo);
- } else if (!servicesRefSet) {
- services = new RootBeanDefinition(TokenBasedRememberMeServices.class);
- }
-
- if (services != null) {
-
-
-
- if (userServiceSet) {
- services.getPropertyValues().addPropertyValue("userDetailsService", new RuntimeBeanReference(userServiceRef));
- }
-
- if ("true".equals(element.getAttribute(ATT_SECURE_COOKIE))) {
- services.getPropertyValues().addPropertyValue("useSecureCookie", true);
- }
-
- if (tokenValiditySet) {
- Integer tokenValidity = new Integer(tokenValiditySeconds);
- if (tokenValidity.intValue() < 0 && isPersistent) {
- pc.getReaderContext().error(ATT_TOKEN_VALIDITY + " cannot be negative if using" +
- " a persistent remember-me token repository", source);
- }
- services.getPropertyValues().addPropertyValue("tokenValiditySeconds", tokenValidity);
- }
- services.setSource(source);
- services.getPropertyValues().addPropertyValue("key", key);
- servicesName = pc.getReaderContext().generateBeanName(services);
- pc.registerBeanComponent(new BeanComponentDefinition(services, servicesName));
- } else {
- servicesName = rememberMeServicesRef;
- }
-
- if (StringUtils.hasText(element.getAttribute(ATT_SERVICES_ALIAS))) {
- pc.getRegistry().registerAlias(servicesName, element.getAttribute(ATT_SERVICES_ALIAS));
- }
-
- BeanDefinition filter = createFilter(pc, source);
- pc.popAndRegisterContainingComponent();
-
- return filter;
- }
上面的解析过程已经很明确了,确实没有在这里注入userDetailsService。如果细心的话,会发现在解析http标签时,有这么一段代码
- authBldr.createUserServiceInjector();
没错,就是这个方法完成动态注入的了
- void createUserServiceInjector() {
- BeanDefinitionBuilder userServiceInjector = BeanDefinitionBuilder.rootBeanDefinition(UserDetailsServiceInjectionBeanPostProcessor.class);
- userServiceInjector.addConstructorArgValue(x509ProviderId);
- userServiceInjector.addConstructorArgValue(rememberMeServicesId);
- userServiceInjector.addConstructorArgValue(openIDProviderId);
- userServiceInjector.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
- pc.getReaderContext().registerWithGeneratedName(userServiceInjector.getBeanDefinition());
- }
UserDetailsServiceInjectionBeanPostProcessor实现了两个接口BeanPostProcessor, BeanFactoryAware,既可以动态改变bean,又能直接获取到BeanFactory对象再从ioc容器中获取具体的bean。 主要看postProcessBeforeInitialization方法
- public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
- if(beanName == null) {
- return bean;
- }
- if (beanName.equals(x509ProviderId)) {
- injectUserDetailsServiceIntoX509Provider((PreAuthenticatedAuthenticationProvider) bean);
- } else if (beanName.equals(rememberMeServicesId)) {
- injectUserDetailsServiceIntoRememberMeServices(bean);
- } else if (beanName.equals(openIDProviderId)) {
- injectUserDetailsServiceIntoOpenIDProvider(bean);
- }
-
- return bean;
- }
只对x509ProviderId、rememberMeServicesId、openIDProviderId的bean动态注入userDetailsService实例。
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