网关服务搭建zuul

柔情只为你懂 2022-04-25 01:34 233阅读 0赞

### [项目地址][Link 1] ###

### 网关服务搭建zuul ###

1.  在spring-cloud项目中新建gateway-server （maven）模块
2.  pom.xml 引入开发包及插件

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>spring-cloud</artifactId>
            <groupId>spring-cloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>gateway-server</artifactId>
    
        <dependencies>
            <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>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
    
        </dependencies>
    
        <build>
            <plugins>
                
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    </project>

1.  java目录下创建路径(com.springcloud.demo)及启动类 GatewayServerApplication.java

package com.springcloud.demo;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.boot.CommandLineRunner;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
    
    /** * 开发公司：青岛海豚数据技术有限公司 * 版权：青岛海豚数据技术有限公司 * <p> * RegisterServerApplication * * @author 刘志强 * @created Create Time: 2019/3/26 */
    @SpringBootApplication
    @EnableEurekaClient
    @EnableZuulProxy
    @EnableAutoConfiguration
    public class GatewayServerApplication implements CommandLineRunner { 
        private final Logger logger = LoggerFactory.getLogger(this.getClass());
    
        public static void main(String[] args) { 
            SpringApplication.run(GatewayServerApplication.class, args);
        }
    
        @Override
        public void run(String... strings) throws Exception { 
            logger.info("服务器启动成功");
        }
    }

1.  创建配置文件 application.yml

spring:
      application:
        name: gateway-server
    server:
      port: 5003
    zuul:
      sensitive-headers:
      routes:
        webService:
          path: /provide/**
          serviceId: provide-server
        appService:
          path: /consumer/**
          serviceId: consumer-server
    
    #注册中心地址
    eureka:
      client:
        serviceUrl:
          defaultZone: http://127.0.0.1:5000/eureka/
      instance:
        hostname: 127.0.0.1
        instance-id: http://127.0.0.1:5003

1.  使用熔断

package com.springcloud.demo.config;
    
    import org.springframework.cloud.netflix.zuul.filters.route.ZuulFallbackProvider;
    import org.springframework.http.HttpHeaders;
    import org.springframework.http.HttpStatus;
    import org.springframework.http.MediaType;
    import org.springframework.http.client.ClientHttpResponse;
    import org.springframework.stereotype.Component;
    
    import java.io.ByteArrayInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    
    /** * 开发公司：青岛海豚数据技术有限公司 * 版权：青岛海豚数据技术有限公司 * <p> * MyZuulFallBack *网关熔断 当provide-server 服务没有启动时或访问超时等时会执行 fallbackResponse 方法 * @author 刘志强 * @created Create Time: 2019/3/26 */
    @Component
    public class MyZuulFallBack implements ZuulFallbackProvider { 
        @Override
        public String getRoute() { 
            return "provide-server";
    // return "*"; 返回* 所有的服务都会走此熔断处理
        }
    
        @Override
        public ClientHttpResponse fallbackResponse() { 
            return new ClientHttpResponse() { 
                @Override
                public HttpStatus getStatusCode() throws IOException { 
                    return HttpStatus.OK;
                }
    
                @Override
                public int getRawStatusCode() throws IOException { 
                    return 200;
                }
    
                @Override
                public String getStatusText() throws IOException { 
                    return "OK";
                }
    
                @Override
                public void close() { 
    
                }
    
                @Override
                public InputStream getBody() throws IOException { 
                    return new ByteArrayInputStream("服务器中断连接".getBytes());
                }
    
                @Override
                public HttpHeaders getHeaders() { 
                    HttpHeaders httpHeaders = new HttpHeaders();
                    httpHeaders.setContentType(MediaType.APPLICATION_JSON);
                    return httpHeaders;
                }
            };
        }
    }

1.  使用过滤器

package com.springcloud.demo.config;
    
    import com.netflix.zuul.ZuulFilter;
    import org.apache.commons.lang.StringUtils;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.io.PrintWriter;
    
    /**
     * 开发公司：青岛海豚数据技术有限公司
     * 版权：青岛海豚数据技术有限公司
     * <p>
     * MyZuulFilter
     *
     * PRE:这种过滤器在请求被路由之前调用。可利用这种过滤器实现身份验证、在集群中选择请求的微服务，记录调试信息等。
     *ROUTING:这种过滤器将请求路由到微服务。这种过滤器用于构建发送给微服务的请求，并使用Apache HttpClient或Netflix Ribbon请求微服务。
     *POST:这种过滤器在路由到微服务以后执行。这种过滤器可用来为响应添加标准的HTTP header、收集统计信息和指标、将响应从微服务发送给客户端等。
     *ERROR:在其他阶段发送错误时执行该过滤器。
     * @author 刘志强
     * @created Create Time: 2019/3/26
     */
    @Component
    public class MyZuulFilter extends ZuulFilter {
        @Autowired
        public HttpServletRequest httpServletRequest;
        @Autowired
        public HttpServletResponse httpServletResponse;
        @Override
        public String filterType() {
            return "pre";
        }
    
        @Override
        // 过滤顺序
        public int filterOrder() {
            return 0;
        }
    
        @Override
        // true 执行过滤逻辑 false 不执行
        public boolean shouldFilter() {
            return true;
        }
    
        @Override
        // 过滤逻辑处理
        public Object run() {
            String auth = httpServletRequest.getHeader("Authorization");
            if (StringUtils.isEmpty(auth)) {
                PrintWriter writer = null;
                String originHeader = httpServletRequest.getHeader("Origin");
                httpServletResponse.setHeader("Access-Control-Allow-Origin", originHeader);
                httpServletResponse.setCharacterEncoding("UTF-8");
                httpServletResponse.addHeader("Access-Control-Allow-Credentials", "true");
                httpServletResponse.addHeader("Vary", "Origin");
                httpServletResponse.setContentType("application/json; charset=utf-8");
                try {
                    writer = httpServletResponse.getWriter();
                    writer.append("请求非法");
                } catch (IOException e) {
                    return null;
                } finally {
                    if (writer != null) {
                        writer.close();
                    }
                }
            }
            return null;
        }
    }

[Link 1]: https://github.com/2425358736/spring-cloud