content: /*
   * 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.camel.component.http.handler;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Map;
  import java.util.Map.Entry;
  
  import org.apache.hc.core5.http.ClassicHttpRequest;
  import org.apache.hc.core5.http.ClassicHttpResponse;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.protocol.HttpContext;
  
  public class HeaderValidationHandler extends BasicValidationHandler {
  
      // Map of headers and values that are expected to be present
      // in HttpRequest.
      protected final Map<String, String> expectedHeaders;
      // List of headers that are expected to be absent from HttpRequest
      // (e.g. for testing filtering).
      protected List<String> absentHeaders;
  
      public HeaderValidationHandler(String expectedMethod, String expectedQuery,
                                     Object expectedContent, String responseContent,
                                     Map<String, String> expectedHeaders) {
          super(expectedMethod, expectedQuery, expectedContent, responseContent);
          this.expectedHeaders = expectedHeaders;
      }
  
      public HeaderValidationHandler(String expectedMethod, String expectedQuery,
                                     Object expectedContent, String responseContent,
                                     Map<String, String> expectedHeaders,
                                     List<String> absentHeaders) {
          this(expectedMethod, expectedQuery, expectedContent, responseContent, expectedHeaders);
          this.absentHeaders = absentHeaders;
      }
  
      @Override
      public void handle(
              final ClassicHttpRequest request, final ClassicHttpResponse response,
              final HttpContext context)
              throws HttpException, IOException {
  
          if (expectedHeaders != null) {
              for (Entry<String, String> entry : expectedHeaders.entrySet()) {
                  boolean headerExist = false;
                  Header[] headers = request.getHeaders(entry.getKey());
  
                  for (Header header : headers) {
                      if (header.getValue().equalsIgnoreCase(entry.getValue())) {
                          headerExist = true;
                          break;
                      }
                  }
  
                  if (!headerExist) {
                      response.setCode(HttpStatus.SC_EXPECTATION_FAILED);
                      return;
                  }
              }
          }
  
          if (absentHeaders != null) {
              for (String header : absentHeaders) {
                  if (request.getHeaders(header).length > 0) {
                      response.setCode(HttpStatus.SC_EXPECTATION_FAILED);
                      return;
                  }
              }
          }
  
          super.handle(request, response, context);
      }
  
  }
  