Spring Cloud Zuul 过滤器拆分serivceId和请求路径
背景
由于项目所需,需要在Zuul网关中解析请求URL,将URL中路由服务的部分和真实请求路径分离开。
localhost:8080/serviceA/api/xxx --> /api/xxx
这个功能比较简单,可以用String API轻松实现,但也可以用Spring-Web内置工具来解决。
实现
Talk is cheap,show me the code.
关键的组件是 RouteLocator 和 UrlPathHelper ,前者通过注入,后者可以实例化为私有变量
@Component
@Slf4j
public class ResourceFilter extends ZuulFilter {
@Autowired
private RouteLocator routeLocator;
private final UrlPathHelper pathHelper = new UrlPathHelper();
@Override
public String filterType() {
return "pre";
}
@Override
public int filterOrder() {
return 0;
}
@Override
public boolean shouldFilter() {
return true;
}
@Override
public Object run() throws ZuulException {
//获取当前请求
HttpServletRequest request = RequestContext.getCurrentContext().getRequest();
log.info("current url {}", request.getRequestURL().toString());
//解析Zuul路由对象
Route matchingRoute = routeLocator.getMatchingRoute(pathHelper.getPathWithinApplication(request));
//matchingRoute.getId() -> 当前路由服务名,即service-id
//matchingRoute.getPath() -> 摘除service-id后的请求路径
log.info("current serviceId : {} , request path : {}", matchingRoute.getId(), matchingRoute.getPath());
return null;
}
}
输出:
current url http://localhost:8080/serviceA/api/xxx
current serviceId : serviceA , request path : /api/xxx
就酱。