| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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 org.apache.servicecomb.edge.core; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.function.BiConsumer; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.servicecomb.common.rest.filter.HttpClientFilter; |
| import org.apache.servicecomb.core.Invocation; |
| import org.apache.servicecomb.foundation.vertx.http.HttpServletRequestEx; |
| import org.apache.servicecomb.foundation.vertx.http.HttpServletResponseEx; |
| import org.apache.servicecomb.swagger.invocation.Response; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.netflix.config.ConfigurationManager; |
| import com.netflix.config.DynamicPropertyFactory; |
| |
| public class EdgeAddHeaderClientFilter implements HttpClientFilter { |
| private static final Logger LOGGER = LoggerFactory.getLogger(EdgeAddHeaderClientFilter.class); |
| |
| private static final String PREFIX = "servicecomb.edge.filter.addHeader"; |
| |
| private static final String KEY_ENABLED = PREFIX + ".enabled"; |
| |
| private static final String KEY_HEADERS = PREFIX + ".allowedHeaders"; |
| |
| private List<String> publicHeaders = new ArrayList<>(); |
| |
| private boolean enabled = false; |
| |
| public EdgeAddHeaderClientFilter() { |
| init(); |
| ConfigurationManager.getConfigInstance() |
| .addConfigurationListener(event -> { |
| if (StringUtils.startsWith(event.getPropertyName(), PREFIX)) { |
| LOGGER.info("Public headers config have been changed. Event=" + event.getType()); |
| init(); |
| } |
| }); |
| } |
| |
| private void init() { |
| enabled = DynamicPropertyFactory.getInstance().getBooleanProperty(KEY_ENABLED, false).get(); |
| String publicHeaderStr = DynamicPropertyFactory.getInstance().getStringProperty(KEY_HEADERS, "").get(); |
| String[] split = publicHeaderStr.split(","); |
| if (split.length > 0) { |
| publicHeaders = Arrays.asList(split); |
| } |
| } |
| |
| @Override |
| public int getOrder() { |
| return 0; |
| } |
| |
| @Override |
| public boolean enabled() { |
| return enabled; |
| } |
| |
| @Override |
| public void beforeSendRequest(Invocation invocation, HttpServletRequestEx requestEx) { |
| addHeaders(invocation, requestEx::addHeader); |
| } |
| |
| public void addHeaders(Invocation invocation, BiConsumer<String, String> headerAdder) { |
| if (!invocation.isEdge()) { |
| return; |
| } |
| |
| HttpServletRequestEx oldRequest = invocation.getRequestEx(); |
| publicHeaders.forEach(key -> { |
| String value = oldRequest.getHeader(key); |
| if (StringUtils.isNotEmpty(value)) { |
| headerAdder.accept(key, value); |
| } |
| }); |
| } |
| |
| @Override |
| public Response afterReceiveResponse(Invocation invocation, HttpServletResponseEx responseEx) { |
| return null; |
| } |
| } |