Spring Cloud --zuul搭建 之 自定义 filter

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上篇文章已经介绍了，zuul基本的搭建，这篇文章 介绍一下自定义 Filter

首先 在 Zuul 模块中 新增加 两个java 类

zuul1Filter 内容如下：

package com.springcloud.zuul.filter;

import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

/**
 * Created by joe强 on 2018/9/27 17:26
 */

@Component
public class Zuul1Filter extends com.netflix.zuul.ZuulFilter {
    @Override
    public String filterType() {
        return "pre";  //filterType: 表示过滤类型 枚举值:pre 表示路由之前,routing表示路由当中,post表示路由之后,error 表示路由发生错误
    }

    @Override
    public int filterOrder() {
        return 1;
    } //优先级,0是最高优先级即最先执行

    @Override
    public boolean shouldFilter() {
        return true;  //写逻辑,是否要执行过滤。true会执行run函数,false不会执行
    }

    @Override
    public Object run() throws ZuulException {
        System.out.println("\"----------------this is DemoFilter----------\"");
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();
        System.out.println(String.format("%s %s", request.getMethod(), request.getRequestURL().toString()));
        Object accessToken = request.getParameter("token");
        if (accessToken == null) {    //判断释放有token自动            logger.warn("token is empty");            ctx.setSendZuulResponse(false);            ctx.setResponseStatusCode(401);            try {                ctx.getResponse().getWriter().write("token is empty");            }catch (Exception e){}             return null;        }        return null;    }
            System.out.println("token is empty");
            ctx.setSendZuulResponse(false);
            ctx.setResponseStatusCode(401);
            try {
                ctx.getResponse().getWriter().write("token is empty");
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }

            return null;
        }
        return null;
    }
}

 zuul2Filter 内容：

package com.springcloud.zuul.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.stereotype.Component;

/**
 * Created by joe强 on 2018/9/27 17:33
 */
@Component
public class Zuul21Filter extends ZuulFilter {

    @Override
    public String filterType() {
        return "pre";
    }

    @Override
    public int filterOrder() {
        return 0; //优先级,0是最高优先级 即最高执行
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() throws ZuulException {
        System.out.println("执行 Zuul2Filter");
        return "this is Zuul2Filter";
    }
}

启动 Euaeka 注册中心，server1服务 和当前Zuul 网关

调用接口：

说明自定义过滤器已经生效了！

看下控制台输出

可以看的出来 优先级也生效了！