SkyeBeFreeman
3 years ago
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b9ebbcdada
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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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*/
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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.MetadataContext;
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import com.tencent.cloud.metadata.context.MetadataContextHolder;
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import org.springframework.cloud.gateway.filter.GatewayFilterChain;
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import org.springframework.cloud.gateway.route.Route;
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import org.springframework.web.server.ServerWebExchange;
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import reactor.core.publisher.Mono;
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import static org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.ROUTE_TO_URL_FILTER_ORDER;
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import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR;
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/**
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* @author Haotian Zhang
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*/
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public class MetadataFirstScgFilter extends AbstractGlobalFilter {
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@Override
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public int getOrder() {
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return ROUTE_TO_URL_FILTER_ORDER + 1;
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}
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@Override
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public boolean shouldFilter(ServerWebExchange exchange, GatewayFilterChain chain) {
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return true;
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}
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@Override
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public Mono<Void> doFilter(ServerWebExchange exchange, GatewayFilterChain chain) {
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// get request context
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Route route = exchange.getAttribute(GATEWAY_ROUTE_ATTR);
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// get metadata of current thread
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MetadataContext metadataContext = exchange.getAttribute(MetadataConstant.HeaderName.METADATA_CONTEXT);
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// TODO 对端命名空间暂时与本地命名空间相同
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metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_NAMESPACE,
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MetadataContextHolder.get().getSystemMetadata(MetadataConstant.SystemMetadataKey.LOCAL_NAMESPACE));
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metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_SERVICE, route.getId());
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metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_PATH,
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exchange.getRequest().getURI().getPath());
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exchange.getAttributes().put(MetadataConstant.HeaderName.METADATA_CONTEXT, metadataContext);
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return chain.filter(exchange);
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}
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}
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