springCloud Zuul网关
1.springboot 仅2.0.x 支持，在此选择 2.0.7
2.新建Module eureka-zuul-client
3.导入依赖
<?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">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.hc</groupId>
<artifactId>demoparent</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<artifactId>eureka-zuul-client</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入关于 eureka-server的依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
<!--引入网关 zuul依赖-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
<!--运行状态监控-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!--mybatis配置 start-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.2.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
</dependency>
<!--mybatis配置 end-->
</dependencies>
</project>
4.启动类加上注解
@EnableEurekaClient
@EnableZuulProxy
5.增加配置文件application.yml
server:
port: 8767
spring:
main:
allow-bean-definition-overriding: true
datasource:
url: jdbc:mysql://192.168.9.1:3306/test1?useUnicode=true&characterEncoding=utf8
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver
application:
name: eureka-zuul-client
eureka:
client:
#改变eureka server的检查方式，使用actuator 的health进行检查，可能会检查到数据库
healthcheck:
enabled: true
service-url:
defaultZone: http://localhost:8761/eureka/
instance:
prefer-ip-address: true
instanceId: ${spring.application.name}:${server.port}
# 每隔10s发送一次心跳
lease-renewal-interval-in-seconds: 10
# 告知服务端30秒还未收到心跳的话，就将该服务移除列表
lease-expiration-duration-in-seconds: 30
#改变eureka 服务端的 status 状态跳转查看页面
status-page-url-path: /actuator/health
management:
endpoints:
web:
exposure:
include: "*"
server:
port: 10116
servlet:
context-path: /
ssl:
enabled: false
endpoint:
health:
show-details: always
zuul:
routes:
zuulHello:
path: /zuulHello/**
serviceId: eureka-client
ribbonHello:
path: /ribbonHello/**
serviceId: eureka-ribbon-client
feignHello:
path: /feignHello/**
serviceId: eureka-feign-client
prefix: /v1
6.增加zuul熔断器
代码：
package com.example.eurekazuulclient.hystrixList; import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
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; @Component
public class MyFallbackProvider implements FallbackProvider {
@Override
public String getRoute() {
//return "eureka-client";
return "*";
} @Override
public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
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("fallback".getBytes());
} @Override
public HttpHeaders getHeaders() {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
return headers;
}
};
}
}//end
7.增加zuul 过滤器
pre
package com.example.eurekazuulclient.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.springframework.stereotype.Component; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException; @Component
public class MyFilter_pre extends ZuulFilter {
@Override
public String filterType() {
/**
* pre 代表请求被路由前执行
*/
return "pre";
} @Override
public int filterOrder() {
/**
* 过滤器执行的顺序 越小越靠前
*/
return 0;
} @Override
public boolean shouldFilter() {
/**
* 判断过滤器是否执行
*/
return true;
} @Override
public Object run() throws ZuulException {
RequestContext currentContext = RequestContext.getCurrentContext();
HttpServletRequest request = currentContext.getRequest();
System.out.println("pre send " + request.getMethod() + " Request to " + request.getRequestURL().toString());
//int i = 1 / 0;
String token = request.getParameter("token");
if (StringUtils.isBlank(token)) {
System.out.println("access token is empty");
currentContext.setSendZuulResponse(false);
currentContext.setResponseStatusCode(401);
try {
HttpServletResponse response = currentContext.getResponse();
response.setCharacterEncoding("utf-8"); //设置字符集
response.setContentType("text/html; charset=utf-8"); //设置相应格式
response.getWriter().write("token 验证失败");
} catch (IOException e) {
System.out.println("response io异常");
e.printStackTrace();
}
return null;
}
return null;
}
}//end
post
package com.example.eurekazuulclient.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.HttpServletRequest; @Component
public class MyFilter_post extends ZuulFilter {
@Override
public String filterType() {
/**
* post 它是在请求己被路由到微服务后执行的 般情况下，用作收集统计
* 信息、指标，以及将响应传输到客户端
*/
return "post";
} @Override
public int filterOrder() {
/**
* 过滤器执行的顺序 越小越靠前
*/
return 0;
} @Override
public boolean shouldFilter() {
/**
* 判断过滤器是否执行
*/
return true;
} @Override
public Object run() throws ZuulException {
RequestContext currentContext = RequestContext.getCurrentContext();
HttpServletRequest request = currentContext.getRequest();
System.out.println("post send " + request.getMethod() + " Request to " + request.getRequestURL().toString());
return null;
}
}//end
error
package com.example.eurekazuulclient.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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException; @Component
public class MyFilter_error extends ZuulFilter {
@Override
public String filterType() {
/**
* error 在其他过滤器发生错误时执行
*/
return "error";
} @Override
public int filterOrder() {
/**
* 过滤器执行的顺序 越小越靠前
*/
return 0;
} @Override
public boolean shouldFilter() {
/**
* 判断过滤器是否执行
*/
return true;
} @Override
public Object run() throws ZuulException {
RequestContext currentContext = RequestContext.getCurrentContext();
HttpServletRequest request = currentContext.getRequest();
System.out.println("error send " + request.getMethod() + " Request to " + request.getRequestURL().toString());
try {
HttpServletResponse response = currentContext.getResponse();
response.setCharacterEncoding("utf-8"); //设置字符集
response.setContentType("text/html; charset=utf-8"); //设置相应格式
response.getWriter().write("error 验证失败");
} catch (IOException e) {
System.out.println("response io异常");
e.printStackTrace();
}
return null;
}
}//end
routing
package com.example.eurekazuulclient.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.HttpServletRequest; @Component
public class MyFilter_routing extends ZuulFilter {
@Override
public String filterType() {
/**
* routing 它用于将请求路由到具体的微服务实例。在默认情况下，它使用
* Http Client 进行网络请求。
*/
return "routing";
} @Override
public int filterOrder() {
/**
* 过滤器执行的顺序 越小越靠前
*/
return 0;
} @Override
public boolean shouldFilter() {
/**
* 判断过滤器是否执行
*/
return true;
} @Override
public Object run() throws ZuulException {
RequestContext currentContext = RequestContext.getCurrentContext();
HttpServletRequest request = currentContext.getRequest();
System.out.println("routing send " + request.getMethod() + " Request to " + request.getRequestURL().toString());
return null;
}
}//end
7.依次启动，eureka-server eureka-client-01 eureka-client eureka-feign-client eureka-ribbon-client eureka-zuul-client
访问 http://192.168.9.6:8767/v1/zuulHello/hello?token=123 显示
访问 http://192.168.9.6:8767/v1/ribbonHello/hello?token=123 显示
访问 http://192.168.9.6:8767/v1/feignHello/hello 显示
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