bruceppeng
3 years ago
parent
936fc4b5c1
commit
92edbe4107
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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package com.tencent.cloud.polaris.gateway.core.route;
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import javax.annotation.Resource;
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import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
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import org.springframework.cloud.gateway.route.RouteDefinition;
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import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
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import org.springframework.context.ApplicationEventPublisher;
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import org.springframework.context.ApplicationEventPublisherAware;
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import reactor.core.publisher.Mono;
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/**
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* dynamic route service.
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*
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* @author bruceppeng
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*/
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public class DynamicRouteService implements ApplicationEventPublisherAware {
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@Resource
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private RouteDefinitionWriter routeDefinitionWriter;
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private ApplicationEventPublisher publisher;
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private void notifyChanged() {
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this.publisher.publishEvent(new RefreshRoutesEvent(this));
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}
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/**
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* add route.
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* @param definition definition
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* @return sucess
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*/
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public String add(RouteDefinition definition) {
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routeDefinitionWriter.save(Mono.just(definition)).subscribe();
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notifyChanged();
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return "success";
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}
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/**
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* update route.
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* @param definition definition
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* @return sucess
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*/
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public String update(RouteDefinition definition) {
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try {
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this.routeDefinitionWriter.delete(Mono.just(definition.getId()));
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} catch (Exception e) {
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return "update fail,not find route routeId: " + definition.getId();
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}
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try {
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routeDefinitionWriter.save(Mono.just(definition)).subscribe();
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notifyChanged();
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return "success";
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} catch (Exception e) {
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return "update route fail";
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}
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}
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/**
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* delete route.
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* @param id id
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* @return sucess
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*/
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public String delete(String id) {
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try {
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this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
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notifyChanged();
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return "delete success";
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} catch (Exception e) {
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e.printStackTrace();
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return "delete fail";
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}
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}
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@Override
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public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
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this.publisher = applicationEventPublisher;
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}
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}
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@ -0,0 +1,107 @@
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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package com.tencent.cloud.polaris.gateway.core.scg.filter;
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import com.tencent.cloud.metadata.constant.MetadataConstant;
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import com.tencent.cloud.metadata.context.MetadataContextHolder;
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import com.tencent.cloud.polaris.gateway.core.route.DynamicRouteService;
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import java.net.URI;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.cloud.gateway.config.GatewayProperties;
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import org.springframework.cloud.gateway.filter.FilterDefinition;
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import org.springframework.cloud.gateway.handler.predicate.PredicateDefinition;
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import org.springframework.cloud.gateway.route.RouteDefinition;
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import org.springframework.core.Ordered;
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import org.springframework.http.server.reactive.ServerHttpRequest;
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import org.springframework.web.server.ServerWebExchange;
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import org.springframework.web.server.WebFilter;
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import org.springframework.web.server.WebFilterChain;
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import reactor.core.publisher.Mono;
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/**
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* Filter for implement dynamic route.
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*
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* @author kan peng
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*/
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public class DynamicRouteScgFilter implements WebFilter, Ordered {
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private static final Logger LOG = LoggerFactory.getLogger(DynamicRouteScgFilter.class);
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@Autowired
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private DynamicRouteService dynamicRouteService;
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@Autowired
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private GatewayProperties gatewayProperties;
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@Override
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public int getOrder() {
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return MetadataConstant.OrderConstant.FILTER_ORDER + 1;
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}
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@Override
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public Mono<Void> filter(ServerWebExchange serverWebExchange, WebFilterChain webFilterChain) {
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ServerHttpRequest serverHttpRequest = serverWebExchange.getRequest();
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String requestPath = serverHttpRequest.getURI().getPath();
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String[] pathList = requestPath.split("/");
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String id = pathList[1];
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String path = String.format("/%s/**",id);
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//判断是否已经加载此route
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for(RouteDefinition routeDefinition: gatewayProperties.getRoutes()){
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if (id.equals(routeDefinition.getId())){
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return webFilterChain.filter(serverWebExchange)
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.doOnError(throwable -> LOG.error("handle DynamicRouteFilter[{}] error.", MetadataContextHolder.get(), throwable))
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.doFinally((type) -> MetadataContextHolder.remove());
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}
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}
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RouteDefinition definition = new RouteDefinition();
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definition.setId(id);
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URI uri = URI.create("lb://"+id);
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definition.setUri(uri);
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//定义第一个断言
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PredicateDefinition predicate = new PredicateDefinition();
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predicate.setName("Path");
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Map<String, String> predicateParams = new HashMap<>(8);
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predicateParams.put("pattern", path);
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predicate.setArgs(predicateParams);
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//定义Filter
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FilterDefinition filter = new FilterDefinition();
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filter.setName("StripPrefix");
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filter.addArg("parts","1");
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definition.setFilters(Arrays.asList(filter));
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definition.setPredicates(Arrays.asList(predicate));
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dynamicRouteService.add(definition);
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return webFilterChain.filter(serverWebExchange)
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.doOnError(throwable -> LOG.error("handle DynamicRouteFilter[{}] error.", MetadataContextHolder.get(), throwable))
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.doFinally((type) -> MetadataContextHolder.remove());
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}
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}
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