在RESTeasy中基于HTTP标头进行拦截

Question

我正在开发两种类型的REST服务.

• 在登录之前,没有会话令牌将传递给HTTP标头.
• 登录后会话令牌将在每个请求中传递.

我不想在每个REST方法中包含@HeaderParam.我想首先拦截它,并根据我想检查会话的有效性.请告诉我

1. 我如何根据RESTEasy中的标题进行拦截
2. 如何避免拦截少数方法

谢谢.

Answer 1

我使用PreProcessInterceptor解决了这个问题

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Securable {
  String header() default "session-token";
}

@Provider
@ServerInterceptor
public class ValidationInterceptor implements PreProcessInterceptor, AcceptedByMethod {

  @Context
  private HttpServletRequest servletRequest;

  @Override
  public boolean accept(Class clazz, Method method) {
    return method.isAnnotationPresent(Securable.class);
  }

  @Override
  public ServerResponse preProcess(HttpRequest httpRequest, ResourceMethod resourceMethod) throws Failure,
      WebApplicationException {

    Securable securable =  resourceMethod.getMethod().getAnnotation(Securable.class);
    String headerValue = servletRequest.getHeader(securable.header());

    if (headerValue == null){
      return (ServerResponse)Response.status(Status.BAD_REQUEST).entity("Invalid Session").build();
    }else{
      // Validatation logic goes here
    }

    return null;
  }
}

@Securable注释将用于需要验证的REST服务.

@Securable
@PUT
public Response updateUser(User user)