Write in front
- The source code is
here . - Read this article to prepare
This article continues the analysis on the basis of this blog post .
This article will create a zuul gateway service and call the service created in the previous blog post.
1: Createmy-service-zuul
new-> module,Follow the prompts to enter gav and other information, select maven
, java8, etc. and then finish, the current project module structure of finish is as shown in the figure below:
2: Set parent
<parent>
<groupId>dongshi.daddy</groupId>
<artifactId>my-eureka</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
3: Introduce dependencies
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
</dependencies>
4: Complete pom
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>dongshi.daddy</groupId>
<artifactId>my-service-zuul</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>my-service-zuul</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>dongshi.daddy</groupId>
<artifactId>my-eureka</artifactId>
<version>1.0-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
</dependencies>
</project>
5: Configuration file
server:
port: 8769
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
spring:
application:
name: service-zuul
zuul:
routes:
api-a:
path: /api-a/**
serviceId: dongshidaddy-first-ribbon
api-b:
path: /api-b/**
serviceId: dongshidaddy-first-feign-client
By zuul.routes.{api-name}.pathsetting the path of the API to be routed, and by zuul.routes.{api-name}.serviceIdsetting the service id of the specific processing API path, the (在eureka服务端注册的id)following mapping relationship exists here:
/api-a/** -> dongshidaddy-first-ribbon
/api-b/** -> dongshidaddy-first-feign-client
6: Enable related solutions
@SpringBootApplication
@EnableZuulProxy
@EnableEurekaClient
@EnableDiscoveryClient
The role is to enable related functions.
7: Test
7.1: Startmy-enreka-server
The service is 注册中心used.
You can see this time No instances available.
7.2: Startmyeureka-client
This service serves as an application of the service that is finally provided to the outside world. Note that this is not for us in my-service-zuulthe application.ymlconfigured serviceId.
The service id DONGSHIDADDY-FIRST-EUREKA-CLIENTis now registered.
7.3: Startmy-service-feign
The service is what we my-service-zuulconfigure in:
api-b:
path: /api-b/**
serviceId: dongshidaddy-first-feign-client
One of the serviceId: dongshidaddy-first-feign-clientcorresponding specific services. The registration information after startup is as follows:
7.4: Startmy-service-ribbon
This service is what we are my-service-zuulconfiguring
api-a:
path: /api-a/**
serviceId: dongshidaddy-first-ribbon
The dongshidaddy-first-ribboncorresponding specific services in the eureka server are as follows after startup:
7.5: Startmy-service-zuul
After startup:
7.6: Access/api-a/**
xbdeMacBook-Air:~ xb$ curl http://localhost:8769/api-a/hi?name=dongshidaddy
hi dongshidaddy ,i am from port:8763
7.7: Access/api-b/**
xbdeMacBook-Air:~ xb$ curl http://localhost:8769/api-b/hi?name=dongshidaddy
hi dongshidaddy ,i am from port:8763
8: Add filtering function
In addition to the routing function, zuul also supports filtering and interception functions. It only needs to implement com.netflix.zuul.ZuulFilterabstract classes, as defined as follows:
@Component
public class MyFilter extends ZuulFilter {
private static Logger log = LoggerFactory.getLogger(MyFilter.class);
@Override
public String filterType() {
return "pre";
}
@Override
public int filterOrder() {
return 0;
}
@Override
public boolean shouldFilter() {
return true;
}
@Override
public Object run() {
RequestContext ctx = RequestContext.getCurrentContext();
HttpServletRequest request = ctx.getRequest();
log.info(String.format("%s >>> %s", request.getMethod(), request.getRequestURL().toString()));
Object accessToken = request.getParameter("token");
if(accessToken == null) {
log.warn("token is empty");
ctx.setSendZuulResponse(false);
ctx.setResponseStatusCode(401);
try {
ctx.getResponse().getWriter().write("token is empty");
}catch (Exception e){
}
return null;
}
log.info("ok");
return null;
}
}
8.1: Testing
Pay attention to restart my-service-zuul.
xbdeMacBook-Air:~ xb$ curl http://localhost:8769/api-b/hi?name=dongshidaddy
token is empty
xbdeMacBook-Air:~ xb$ curl "http://localhost:8769/api-b/hi?name=dongshidaddy&token=111"
hi dongshidaddy ,i am from port:8763
Finally: get out of the way, I want to drink Luckin
