SpringCloud学习笔记-服务网关-Zuul-权限校验

1. 创建前置过滤器

   package com.hx.apigeteway.filter;
   
   import com.netflix.zuul.ZuulFilter;
   import com.netflix.zuul.context.RequestContext;
   import com.netflix.zuul.exception.ZuulException;
   import org.apache.commons.lang.StringUtils;
   import org.apache.http.HttpStatus;
   import org.springframework.stereotype.Component;
   
   import javax.servlet.http.HttpServletRequest;
   
   import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_DECORATION_FILTER_ORDER;
   import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;
   
   @Component
   public class TokenFilter extends ZuulFilter {
       @Override
       public String filterType() {  //过滤器类型  属于前缀
           return PRE_TYPE;
       }
   
       @Override
       public int filterOrder() {  //过滤器顺序  数字越小越靠前
           return PRE_DECORATION_FILTER_ORDER - 1;
       }
   
       @Override
       public boolean shouldFilter() {  // 设置为true  代表这个过滤器是否生效
           return true;
       }
   
       //主要的处理逻辑的地方，我们做权限控制、日志等都是在这里。
       @Override
       public Object run() throws ZuulException {
           RequestContext requestContext=RequestContext.getCurrentContext();
           HttpServletRequest request = requestContext.getRequest();
           //这里从请求头参数获取
           //request.getHeader("token");
           //这里从请求中参数获取
           String token = request.getParameter("token");
           if(StringUtils.isEmpty(token)){
               requestContext.setSendZuulResponse(false);
               requestContext.setResponseStatusCode(HttpStatus.SC_UNAUTHORIZED);
           }
           return null;
       }
   }
   

    

2. 创建后置过滤器

   package com.hx.apigeteway.filter;
   
   import com.netflix.zuul.ZuulFilter;
   import com.netflix.zuul.context.RequestContext;
   import com.netflix.zuul.exception.ZuulException;
   import org.springframework.stereotype.Component;
   
   import javax.servlet.http.HttpServletResponse;
   
   import java.util.UUID;
   
   import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.POST_TYPE;
   import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.SEND_RESPONSE_FILTER_ORDER;
   
   @Component
   public class AddResponseHeaderFilter  extends ZuulFilter {
       @Override
       public String filterType() {
           return POST_TYPE;
       }
   
       @Override
       public int filterOrder() { //FilterConstants
           return SEND_RESPONSE_FILTER_ORDER -1;
       }
   
       @Override
       public boolean shouldFilter() {
           return true;
       }
   
       @Override
       public Object run() throws ZuulException {
           RequestContext requestContext=RequestContext.getCurrentContext();
           HttpServletResponse response = requestContext.getResponse();
           response.setHeader("test", UUID.randomUUID().toString());
           return null;
       }
   }