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.activemq.blob;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.HttpURLConnection;
  import java.net.URL;
  import jakarta.jms.JMSException;
  import org.apache.activemq.command.ActiveMQBlobMessage;
  
  /**
   * A default implementation of {@link BlobDownloadStrategy} which uses the URL
   * class to download files or streams from a remote URL
   */
  public class DefaultBlobDownloadStrategy extends DefaultStrategy implements BlobDownloadStrategy {
  
      public DefaultBlobDownloadStrategy(BlobTransferPolicy transferPolicy) {
          super(transferPolicy);
      }
  
      public InputStream getInputStream(ActiveMQBlobMessage message) throws IOException, JMSException {
          URL value = message.getURL();
          if (value == null) {
              return null;
          }
  
          // Do some checks on the received URL against the transfer policy
          URL uploadURL = new URL(super.transferPolicy.getUploadUrl());
          String protocol = message.getURL().getProtocol();
          if (!protocol.equals(uploadURL.getProtocol())) {
              throw new IOException("The message URL protocol is incorrect");
          }
  
          String host = message.getURL().getHost();
          if (!host.equals(uploadURL.getHost())) {
              throw new IOException("The message URL host is incorrect");
          }
  
          int port = message.getURL().getPort();
          if (uploadURL.getPort() != 0 && port != uploadURL.getPort()) {
              throw new IOException("The message URL port is incorrect");
          }
  
          return value.openStream();
      }
  
      public void deleteFile(ActiveMQBlobMessage message) throws IOException, JMSException {
          URL url = createMessageURL(message);
  
          HttpURLConnection connection = (HttpURLConnection)url.openConnection();
          connection.setRequestMethod("DELETE");
          try {
              connection.connect();
          } catch (IOException e) {
              throw new IOException("DELETE failed on: " + url, e);
          } finally {
              connection.disconnect();
          }
          if (!isSuccessfulCode(connection.getResponseCode())) {
              throw new IOException("DELETE was not successful: " + connection.getResponseCode() + " "
                                    + connection.getResponseMessage());
          }
      }
  
  }
  