基於Finchley.SR2的springcloud系列代碼(zuul 網關服務)(十)

備註：源代碼已經全部上傳到github，有錯誤地方請指正，謝謝！地址：https://github.com/hcmony/springcloud 

1,pom.xml

<?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.hcmony</groupId>
		<artifactId>springcloud</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>

	<artifactId>zuul</artifactId>
	<packaging>jar</packaging>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zuul</artifactId>
			<version>RELEASE</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

2,配置文件

server.port=8094
spring.application.name=zuul
eureka.instance.ip-address=true
eureka.client.service-url.defaultZone= http://localhsot:8888/eureka/

spring.zipkin.base-url=http://localhost:9411
spring.sleuth.sampler.percentage =1.0

zuul.routes.provider.path=/provider/**
zuul.routes.provider.serviceId=provider

zuul.routes.consumer.path=/consumer/**
zuul.routes.consumer.serviceId=consumer

3,java代碼

3.1異常信息控制類

package com.hcmony.controller;

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <h3>異常信息控制類</h3>
 * <p></p>
 *
 * @author hcmony
 * @since V1.0.0, 2019/03/05 10:52
 */
@RestController
public class MyErrorController  implements ErrorController{
	/**
	 * Returns the path of the error page.
	 *
	 * @return the error path
	 */
	@Override
	public String getErrorPath() {
		return "/error";
	}

	@RequestMapping(value = "/error")
	public String error(HttpServletResponse resp, HttpServletRequest req) {
		return "參數異常或者是其它未知異常";
	}

	@RequestMapping(value = "/notoken")
	public String notoken(HttpServletResponse resp, HttpServletRequest req) {
		return "notoken";
	}
}

3.2網關攔截實現類

package com.hcmony;


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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

/**
 * <h3>網關攔截實現類/h3>
 * <p></p>
 *
 * @author hcmony
 * @since V1.0.0, 2019/03/05 10:04
 */
@Component
public class MyZuulFilter extends ZuulFilter {

	private static final Logger LOGGER = LoggerFactory.getLogger(MyZuulFilter.class);
	/**
	 * pre：路由之前
	 routing：路由之時
	 post： 路由之後
	 error：發送錯誤調用
	 * @return
	 */
	@Override
	public String filterType() {
		return "pre";
	}

	@Override
	public int filterOrder() {
		return 0;
	}

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

	@Override
	public Object run() throws ZuulException {
		RequestContext currentContext = RequestContext.getCurrentContext();
		HttpServletRequest request = currentContext.getRequest();
		String  token = request.getParameter("token");
		LOGGER.info("token is {}",token);
		if (StringUtils.isNotBlank(token)&&"token".equals(token)){
			return null;
		}
		try {
			currentContext.getResponse().sendRedirect("/notoken");
		}catch (Exception e){

		}
		return null;
	}

}

3.3啓動類

package com.hcmony;

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


@EnableZuulProxy
@SpringBootApplication
public class ZuulApplication {

	public static void main(String[] args) {
		SpringApplication.run(ZuulApplication.class, args);
	}
}