加入依賴;
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
配置application.yml;
eureka:
client:
service-url:
defaultZone: http://localhost:8080/eureka/
server:
port: 8765
spring:
application:
name: service-zuul
zuul:
routes:
api-a:
path: /api-member/**
service-id: service-member
api-b:
path: /api-order/**
service-id: service-order
創建啓動器;
@EnableZuulProxy
@EnableEurekaClient
@SpringBootApplication
public class ZullApplication {
public static void main(String[] args) {
SpringApplication.run(ZullApplication.class, args);
}
}
根據在application.yml中的配置,將在eureka中註冊的服務包裝,攔截請求,
根據配置轉發到實際地址,解決跨域問題
zuul網關攔截參數:
定義一個zuulfilter:
@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;
}
}
filterType:返回一個字符串代表過濾器的類型,在zuul中定義了四種不同生命週期的過濾器類型,具體如下:
- pre:路由之前
- routing:路由之時
- post: 路由之後
- error:發送錯誤調用
- filterOrder:過濾的順序
- shouldFilter:這裏可以寫邏輯判斷,是否要過濾,本文true,永遠過濾。
- run:過濾器的具體邏輯。可用很複雜,包括查sql,nosql去判斷該請求到底有沒有權限訪問。
這時訪問:http://localhost:8080/hi 網頁顯示:
token is empty
訪問 http://localhost:8080/hi?token=22
正常顯示