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;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.nio.charset.StandardCharsets;
  import java.util.Collections;
  
  import com.sun.net.httpserver.HttpExchange;
  import com.sun.net.httpserver.HttpServer;
  import org.apache.camel.Producer;
  import org.apache.camel.http.base.HttpOperationFailedException;
  import org.apache.camel.impl.DefaultCamelContext;
  import org.apache.camel.spi.RestConfiguration;
  import org.apache.camel.support.DefaultExchange;
  import org.apache.camel.support.DefaultMessage;
  import org.apache.camel.support.ExceptionHelper;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.ContentType.APPLICATION_JSON;
  import static org.apache.camel.component.http.HttpMethods.POST;
  import static org.apache.hc.core5.http.HttpHeaders.HOST;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.fail;
  
  public class HeaderFilteringTest {
  
      private static final String BODY = "{\"example\":\"json\"}";
  
      private int port;
  
      private HttpServer server;
  
      @Test
      public void shouldFilterIncomingHttpHeadersInProducer() throws Exception {
          final DefaultCamelContext context = new DefaultCamelContext();
          context.start();
  
          final HttpComponent http = context.getComponent("http", HttpComponent.class);
  
          final Producer producer = http.createProducer(context, "http://localhost:" + port, POST.name(), "/test", null, null,
                  APPLICATION_JSON.getMimeType(), APPLICATION_JSON.getMimeType(), new RestConfiguration(),
                  Collections.emptyMap());
  
          final DefaultExchange exchange = new DefaultExchange(context);
          final DefaultMessage in = new DefaultMessage(context);
          in.setHeader(HOST, "www.not-localhost.io");
          in.setBody(BODY);
          exchange.setIn(in);
  
          producer.start();
          try {
              producer.process(exchange);
          } catch (final HttpOperationFailedException e) {
              fail(e.getMessage() + "\n%s", e.getResponseBody());
          }
          producer.stop();
          context.stop();
      }
  
      @BeforeEach
      public void startHttpServer() throws IOException {
          server = HttpServer.create(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0), 0);
          server.createContext("/test", this::handleTest);
          server.start();
  
          port = server.getAddress().getPort();
      }
  
      @AfterEach
      public void stopHttpServer() {
          server.stop(0);
      }
  
      private void handleTest(final HttpExchange exchange) throws IOException {
          try (final OutputStream responseBody = exchange.getResponseBody()) {
              try {
                  assertThat(exchange.getRequestBody())
                          .hasSameContentAs(new ByteArrayInputStream(BODY.getBytes(StandardCharsets.UTF_8)));
                  assertThat(exchange.getRequestHeaders()).containsEntry(HOST,
                          Collections.singletonList("localhost:" + port));
  
                  exchange.sendResponseHeaders(200, 0);
              } catch (final AssertionError error) {
                  final String failure = ExceptionHelper.stackTraceToString(error);
                  final byte[] failureBytes = failure.getBytes(StandardCharsets.UTF_8);
                  exchange.sendResponseHeaders(500, failureBytes.length);
                  responseBody.write(failureBytes);
              }
          }
      }
  }
  