Merge pull request #190 from lepdou/h/router_expression_label2
feature: support router expression labelpull/184/head
Haotian Zhang
3 years ago
committed by
GitHub
commit
2caa4d2d30
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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.router;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import com.tencent.cloud.common.util.ExpressionLabelUtils;
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import com.tencent.cloud.polaris.context.ServiceRuleManager;
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import com.tencent.polaris.client.pb.ModelProto;
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import com.tencent.polaris.client.pb.RoutingProto;
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import org.springframework.util.CollectionUtils;
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/**
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* Resolve label expressions from routing rules.
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* @author lepdou 2022-05-19
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*/
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public class RouterRuleLabelResolver {
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private final ServiceRuleManager serviceRuleManager;
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public RouterRuleLabelResolver(ServiceRuleManager serviceRuleManager) {
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this.serviceRuleManager = serviceRuleManager;
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}
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public Set<String> getExpressionLabelKeys(String namespace, String sourceService, String dstService) {
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List<RoutingProto.Route> rules = serviceRuleManager.getServiceRouterRule(namespace, sourceService, dstService);
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if (CollectionUtils.isEmpty(rules)) {
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return Collections.emptySet();
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}
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Set<String> expressionLabels = new HashSet<>();
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for (RoutingProto.Route rule : rules) {
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List<RoutingProto.Source> sources = rule.getSourcesList();
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if (CollectionUtils.isEmpty(sources)) {
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continue;
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}
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for (RoutingProto.Source source : sources) {
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Map<String, ModelProto.MatchString> labels = source.getMetadataMap();
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if (CollectionUtils.isEmpty(labels)) {
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continue;
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}
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for (String labelKey : labels.keySet()) {
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if (ExpressionLabelUtils.isExpressionLabel(labelKey)) {
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expressionLabels.add(labelKey);
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}
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}
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}
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}
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return expressionLabels;
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}
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}
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@ -0,0 +1,81 @@
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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.router.feign;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import com.tencent.cloud.common.util.ExpressionLabelUtils;
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import feign.RequestTemplate;
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import org.apache.commons.lang.StringUtils;
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import org.springframework.util.CollectionUtils;
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/**
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* Resolve rule expression label from feign request.
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* @author lepdou 2022-05-20
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*/
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public class FeignExpressionLabelUtils {
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public static Map<String, String> resolve(RequestTemplate request, Set<String> labelKeys) {
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if (CollectionUtils.isEmpty(labelKeys)) {
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return Collections.emptyMap();
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}
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Map<String, String> labels = new HashMap<>();
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for (String labelKey : labelKeys) {
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if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_HEADER_PREFIX)) {
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String headerKey = ExpressionLabelUtils.parseHeaderKey(labelKey);
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if (StringUtils.isBlank(headerKey)) {
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continue;
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}
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labels.put(labelKey, getHeaderValue(request, headerKey));
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}
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else if (StringUtils.startsWithIgnoreCase(labelKey, ExpressionLabelUtils.LABEL_QUERY_PREFIX)) {
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String queryKey = ExpressionLabelUtils.parseQueryKey(labelKey);
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if (StringUtils.isBlank(queryKey)) {
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continue;
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}
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labels.put(labelKey, getQueryValue(request, queryKey));
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}
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else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_METHOD, labelKey)) {
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labels.put(labelKey, request.method());
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}
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else if (StringUtils.equalsIgnoreCase(ExpressionLabelUtils.LABEL_URI, labelKey)) {
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labels.put(labelKey, request.request().url());
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}
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}
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return labels;
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}
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public static String getHeaderValue(RequestTemplate request, String key) {
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Map<String, Collection<String>> headers = request.headers();
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return ExpressionLabelUtils.getFirstValue(headers, key);
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}
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public static String getQueryValue(RequestTemplate request, String key) {
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return ExpressionLabelUtils.getFirstValue(request.queries(), key);
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}
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}
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