允许匿名请求的Spring Boot OAuth2 Feign

要实现允许匿名请求的Spring Boot OAuth2 Feign，您可以按照以下步骤进行操作：

1. 添加所需的依赖项。在您的Spring Boot项目的pom.xml文件中添加以下依赖项：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security.oauth.boot</groupId>
    <artifactId>spring-security-oauth2-autoconfigure</artifactId>
</dependency>

2. 创建一个Feign客户端接口。创建一个接口，并使用@FeignClient注解将其标记为Feign客户端。

@FeignClient(name = "my-service", url = "http://localhost:8080", configuration = FeignConfiguration.class)
public interface MyServiceClient {

    @RequestMapping(value = "/api/resource", method = RequestMethod.GET)
    ResponseEntity<String> getResource();
}

3. 创建一个Feign配置类。在您的项目中创建一个配置类，实现RequestInterceptor接口，并在apply方法中添加逻辑来处理OAuth2令牌。

@Configuration
public class FeignConfiguration implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication != null && authentication instanceof OAuth2Authentication) {
            OAuth2Authentication oauth = (OAuth2Authentication) authentication;
            OAuth2AuthenticationDetails details = (OAuth2AuthenticationDetails) oauth.getDetails();
            template.header("Authorization", "Bearer " + details.getTokenValue());
        }
    }
}

4. 配置Spring Security。在您的Spring Boot项目中的application.properties或application.yml文件中添加以下配置来允许匿名访问所需的端点。

security:
  oauth2:
    resource:
      jwt:
        key-value: your-public-key
  ignored: /api/resource

或者，您可以创建一个配置类来配置Spring Security：

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/api/resource").permitAll()
            .anyRequest().authenticated();
    }
}

以上就是实现允许匿名请求的Spring Boot OAuth2 Feign的解决方法。请根据您的项目需求进行调整和修改。