Spring Security OAuth 格式化 token 输出

个性化token 背景

上一篇文章《Spring Security OAuth 个性化token（一）》有提到，oauth2.0 接口默认返回的报文格式如下：

{  
    "access_token": "e6669cdf-b6cd-43fe-af5c-f91a65041382",  
    "token_type": "bearer",  
    "refresh_token": "da91294d-446c-4a89-bdcf-88aee15a75e8",  
    "expires_in": 43199,   
    "scope": "server"  
}

通过上篇文章我们已经可以扩展增加部分业务字段。

{  
    "access_token":"a6f3b6d6-93e6-4eb8-a97d-3ae72240a7b0",  
    "token_type":"bearer",  
    "refresh_token":"710ab162-a482-41cd-8bad-26456af38e4f",  
    "expires_in":42396,  
    "scope":"server",  
    "tenant_id":1,  
    "license":"made by pigx",  
    "dept_id":1,  
    "user_id":1,  
    "username":"admin"  
}

「在一些场景下我们需要自定义一下返回报文的格式,例如pig 使用R 对象返回，全部包含code业务码信息」

{  
    "code":1,  
    "msg":"",  
    "data":{  
        "access_token":"e6669cdf-b6cd-43fe-af5c-f91a65041382",  
        "token_type":"bearer",  
        "refresh_token":"da91294d-446c-4a89-bdcf-88aee15a75e8",  
        "expires_in":43199,  
        "scope":"server"  
    }  
}

方法一：HandlerMethodReturnValueHandler

顾名思义这是 Spring MVC 提供给我们修改方法返回值的接口

public class FormatterToken implements HandlerMethodReturnValueHandler {

private static final String POST_ACCESS_TOKEN = "postAccessToken";

@Override
public boolean supportsReturnType(MethodParameter returnType) {
     // 判断方法名是否是 oauth2 的token 接口，是就处理
  return POST_ACCESS_TOKEN.equals(Objects
    .requireNonNull(returnType.getMethod()).getName());
}

  // 获取到返回值然后使用 R对象统一包装
@Override
public void handleReturnValue(Object returnValue, MethodParameter returnType, ModelAndViewContainer container, NativeWebRequest request) throws Exception {
  ResponseEntity responseEntity = (ResponseEntity) returnValue;
  OAuth2AccessToken body = responseEntity.getBody();

  HttpServletResponse response = request.getNativeResponse(HttpServletResponse.class);
  assert response != null;
  WebUtils.renderJson(response, R.ok(body));
}
}
注入FormatterToken，一定要这么处理，不要直接使用 MVCconfig 注入，保证此Handler比 SpringMVC 默认的提前执行。

public class FormatterTokenAutoConfiguration implements ApplicationContextAware, InitializingBean {
private ApplicationContext applicationContext;

@Override
public void afterPropertiesSet() {
  RequestMappingHandlerAdapter handlerAdapter = applicationContext.getBean(RequestMappingHandlerAdapter.class);
  List returnValueHandlers = handlerAdapter.getReturnValueHandlers();

  List newHandlers = new ArrayList<>();
  newHandlers.add(new FormatterToken());
  assert returnValueHandlers != null;
  newHandlers.addAll(returnValueHandlers);
  handlerAdapter.setReturnValueHandlers(newHandlers);
}

@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
  this.applicationContext = applicationContext;
}
}

方法二：aop 拦截增强 /oauth/token 接口

@Around("execution(* org.springframework.security.oauth2.provider.endpoint.TokenEndpoint.postAccessToken(..))")  
public Object handlePostAccessTokenMethod(ProceedingJoinPoint joinPoint) throws Throwable {  
   // 获取原有值，进行包装返回  
      Object proceed = joinPoint.proceed();  
  
      ResponseEntity<OAuth2AccessToken> responseEntity = (ResponseEntity<OAuth2AccessToken>) proceed;  
        OAuth2AccessToken body = responseEntity.getBody();  
        return ResponseEntity  
                  .status(HttpStatus.OK)  
                  .body(R.ok(body));  
        }  
}