使用 spring-boot-starter-oauth2-client 检索 OAuth2 3-legged 身份验证的访问令牌

我想知道如何使用提供的功能在 Spring Boot 3-legged 身份验证上检索访问令牌 org.springframework.boot:spring-boot-starter-oauth2-client

我能够使用常规RestTemplate调用获取访问令牌。

我尝试spring-boot-starter-oauth2-client按照https://github.com/wonwoo/spring-boot-oauth2-login 中的示例使用这些功能获取相同的访问令牌。

我能够检索服务器提供的代码，但我不知道如何获取访问令牌。

我的代码如下所示：

属性在application.properties：

spring.security.oauth2.client.registration.my-client-name-here.client-id=__client_id_here__
spring.security.oauth2.client.registration.my-client-name-here.client-secret=__client_secret_here__
spring.security.oauth2.client.registration.my-client-name-here.authorization-grant-type=authorization_code
spring.security.oauth2.client.registration.my-client-name-here.redirect-uri-template=http://localhost:8080/authentication/3leggedtoken/callback
spring.security.oauth2.client.registration.my-client-name-here.scope=data:read
spring.security.oauth2.client.registration.my-client-name-here.client-name=__client_name_here__
spring.security.oauth2.client.registration.my-client-name-here.client-authentication-method=POST
spring.security.oauth2.client.provider.my-client-name-here.token-uri=https://example.com/api/token
spring.security.oauth2.client.provider.my-client-name-here.authorization-uri=https://example.com/api/authorize
spring.security.oauth2.client.provider.my-client-name-here.user-info-uri=
spring.security.oauth2.client.provider.my-client-name-here.user-name-attribute=

Thymeleaf 模板在login.html：

<div th:each="registration: ${registrations}">
  <a th:href="@{${registration.uri}}">
      Sign in with [[${registration.clientName}]]
  </a>
</div>

配置SecurityConfig.java：

@Configuration
@EnableWebSecurity
public class SegurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http_security) throws Exception {
        http_security.authorizeRequests().requestMatchers(PathRequest.toStaticResources().atCommonLocations())
                .permitAll().antMatchers("/authentication/**").permitAll().anyRequest().authenticated().and().oauth2Login()
                .loginPage("/authentication/login").permitAll();
    }
}

控制器AuthenticationController.java：

@Controller
public class AuthenticationController {

    @Autowired
    OAuth2AuthorizedClientService clientService;

    @Autowired
    InMemoryClientRegistrationRepository clientRegistrationRepository;

    @GetMapping("authentication/login")
    public String login(Model model) {
        List<Registration> registrations = StreamSupport.stream(clientRegistrationRepository.spliterator(), true)
                .map(clientRegistration -> new Registration(clientRegistration.getRegistrationId(),
                        OAuth2AuthorizationRequestRedirectFilter.DEFAULT_AUTHORIZATION_REQUEST_BASE_URI + "/"
                                + clientRegistration.getRegistrationId(),
                        clientRegistration.getClientName()))
                .collect(Collectors.toList());
        model.addAttribute("registrations", registrations);
        return "authentication/login";
    }

    @GetMapping("authentication/3leggedtoken/callback")
    public String accessToken(Model model, @RequestParam("code") String code) {     
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication.getClass().isAssignableFrom(OAuth2AuthenticationToken.class)) {
            OAuth2AuthenticationToken oauthToken = (OAuth2AuthenticationToken) authentication;
            String clientRegistrationId = oauthToken.getAuthorizedClientRegistrationId();
            OAuth2AuthorizedClient client = clientService.loadAuthorizedClient(clientRegistrationId,
                    oauthToken.getName());
            return client.getAccessToken().getTokenValue();
        }
        return null;
    }

应用程序成功创建了一个到服务器认证页面的链接，并且重定向 URI 在登录后被回调。

回调中返回的代码是正确的

public String accessToken(Model model, @RequestParam("code") String code) {...}

但身份验证不是类型 OAuth2AuthenticationToken

Authentication authentication = SecurityContextHolder.getContext().getAuthentication();

但类型 AnonymousAuthenticationToken

org.springframework.security.authentication.AnonymousAuthenticationToken@ef72fdb1:
   Principal: anonymousUser; Credentials: [PROTECTED]; Authenticated: true;
   Details: org.springframework.security.web.authentication.WebAuthenticationDetails@b364:
       RemoteIpAddress: 0:0:0:0:0:0:0:1; SessionId: D8FFF6F20C14791E505B8B86648F7E1B;
       Granted Authorities: ROLE_ANONYMOUS

我应该如何获取访问令牌？我应该如何访问它以在以下请求中传递它？

提前致谢！