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spring-cloud-tencent
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gateway增加动态路由的能力，根据用户url自动匹配到注册的服务

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pull/32/head
bruceppeng 3 years ago
parent 936fc4b5c1
commit 92edbe4107
3 changed files with 222 additions and 0 deletions
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12
spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/config/PolarisGatewayAutoConfiguration.java
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@ -19,6 +19,8 @@ package com.tencent.cloud.polaris.gateway.config;
import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.http.ZuulServlet;
import com.tencent.cloud.polaris.gateway.core.route.DynamicRouteService;
import com.tencent.cloud.polaris.gateway.core.scg.filter.DynamicRouteScgFilter;
import com.tencent.cloud.polaris.gateway.core.scg.filter.Metadata2HeaderScgFilter;
import com.tencent.cloud.polaris.gateway.core.scg.filter.MetadataFirstScgFilter;
import com.tencent.cloud.polaris.gateway.core.scg.filter.RateLimitScgFilter;
@ -73,6 +75,16 @@ public class PolarisGatewayAutoConfiguration {
public GlobalFilter metadata2HeaderScgFilter() {
return new Metadata2HeaderScgFilter();
}
@Bean
public DynamicRouteService dynamicRouteService() {
return new DynamicRouteService();
}
@Bean
public DynamicRouteScgFilter dynamicRouteFilter() {
return new DynamicRouteScgFilter();
}
}
}

103
spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/route/DynamicRouteService.java
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@ -0,0 +1,103 @@
/*
* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
*
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
*
* Licensed under the BSD 3-Clause License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSD-3-Clause
*
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package com.tencent.cloud.polaris.gateway.core.route;
import javax.annotation.Resource;
import org.springframework.cloud.gateway.event.RefreshRoutesEvent;
import org.springframework.cloud.gateway.route.RouteDefinition;
import org.springframework.cloud.gateway.route.RouteDefinitionWriter;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import reactor.core.publisher.Mono;
/**
* dynamic route service.
*
* @author bruceppeng
*/
public class DynamicRouteService implements ApplicationEventPublisherAware {
@Resource
private RouteDefinitionWriter routeDefinitionWriter;
private ApplicationEventPublisher publisher;
private void notifyChanged() {
this.publisher.publishEvent(new RefreshRoutesEvent(this));
}
/**
* add route.
* @param definition definition
* @return sucess
*/
public String add(RouteDefinition definition) {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
notifyChanged();
return "success";
}
/**
* update route.
* @param definition definition
* @return sucess
*/
public String update(RouteDefinition definition) {
try {
this.routeDefinitionWriter.delete(Mono.just(definition.getId()));
} catch (Exception e) {
return "update fail,not find route routeId: " + definition.getId();
}
try {
routeDefinitionWriter.save(Mono.just(definition)).subscribe();
notifyChanged();
return "success";
} catch (Exception e) {
return "update route fail";
}
}
/**
* delete route.
* @param id id
* @return sucess
*/
public String delete(String id) {
try {
this.routeDefinitionWriter.delete(Mono.just(id)).subscribe();
notifyChanged();
return "delete success";
} catch (Exception e) {
e.printStackTrace();
return "delete fail";
}
}
@Override
public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
this.publisher = applicationEventPublisher;
}
}

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