SpringCloud 中 Feign 调用添加 Oauth2 Authorization Header

向右看齐 2022-05-16 09:09 272阅读 0赞

# SpringCloud 中 Feign 调用添加 Oauth2 Authorization Header #

> SpringCloud 中通过 Feign 调用其他服务，当服务使用 Oauth2 授权的时候，Feign 默认并不会将认证的 TOKEN 带在请求的 Header 中，需要手动实现传递 TOKEN 的配置；通过实现`feign.RequestInterceptor`来实现自定义添加认证信息

*  FeignOauth2RequestInterceptor.java

import feign.RequestInterceptor;
    import feign.RequestTemplate;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.security.core.Authentication;
    import org.springframework.security.core.context.SecurityContext;
    import org.springframework.security.core.context.SecurityContextHolder;
    import org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationDetails;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration
    public class FeignOauth2RequestInterceptor implements RequestInterceptor { 
    
        private final String AUTHORIZATION_HEADER = "Authorization";
        private final String BEARER_TOKEN_TYPE = "Bearer";
    
        @Override
        public void apply(RequestTemplate requestTemplate) {
            SecurityContext securityContext = SecurityContextHolder.getContext();
            Authentication authentication = securityContext.getAuthentication();
            if (authentication != null && authentication.getDetails() instanceof OAuth2AuthenticationDetails) {
                OAuth2AuthenticationDetails details = (OAuth2AuthenticationDetails) authentication.getDetails();
                requestTemplate.header(AUTHORIZATION_HEADER, String.format("%s %s", BEARER_TOKEN_TYPE, details.getTokenValue()));
            }
    
        }
    }

这样就可以将请求的认证信息放入到 Header 中，通过认证