Spring Cloud Zuul

指定 Zuul 使用 RestClient 作为 HTTP 客户端

ribbon.restclient.enabled=true

指定 Zuul 使用 okhttp3.OkHttpClient 作为 HTTP 客户端

ribbon.okhttp.enabled=true

Zuul 微服务网关

pom.xml

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>

Application.java

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@SpringBootApplication
@EnableZuulProxy
public class Application
{
    public static void main(String[] args)
    {
        SpringApplication.run(Application.class, args);
    }
}

application.yml

server:
  port: 8040
spring:
  application:
    name: 微服务名称
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/

Zuul 路由配置

将微服务映射到 /user/** 路径

zuul:
  routes:
    微服务名称: /user/**

忽略指定微服务

zuul:
  ignored-services: 微服务1,微服务2

忽略所有微服务，只路由指定微服务

zuul:
  ignored-services: '*'
  routes:
    微服务名称: /user/**

将微服务映射到 /user/** 路径，但忽略该微服务中所有包含 /admin/ 的路径

zuul:
  ignoredPatterns: /**/admin/**
  routes:
    微服务名称: /user/**

自定义过滤器

CustomZuulFilter.java

import com.netflix.zuul.ZuulFilter;
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;

public class CustomZuulFilter extends ZuulFilter
{
    @Override
    public String filterType()
    {
        return FilterConstants.PRE_TYPE;
    }

    @Override
    public int filterOrder()
    {
        return FilterConstants.PRE_DECORATION_FILTER_ORDER - 1;
    }

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

    @Override
    public Object run()
    {
        // ...
        return null;
    }
}

定义 Bean

@Bean
public CustomZuulFilter customZuulFilter()
{
    return new CustomZuulFilter();
}

禁用 CustomZuulFilter 过滤器

zuul.CustomZuulFilter.pre.disable=true