org.apache.activemq.blob.DefaultBlobDownloadStrategy Maven / Gradle / Ivy
/**
* 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 javax.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());
}
}
}