Java tutorial
/************************************************************************* * Copyright 2009-2012 Eucalyptus Systems, Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 3 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://www.gnu.org/licenses/. * * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need * additional information or have any questions. * * This file may incorporate work covered under the following copyright * and permission notice: * * Software License Agreement (BSD License) * * Copyright (c) 2008, Regents of the University of California * All rights reserved. * * Redistribution and use of this software in source and binary forms, * with or without modification, are permitted provided that the * following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE * THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL, * COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE, * AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING * IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, * SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, * WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION, * REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO * IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT * NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS. ************************************************************************/ package com.eucalyptus.objectstorage.pipeline; import com.eucalyptus.component.ComponentIds; import com.google.common.base.Predicate; import com.google.common.collect.Iterators; import com.google.common.collect.Sets; import org.apache.log4j.Logger; import org.jboss.netty.handler.codec.http.HttpHeaders; import org.jboss.netty.handler.codec.http.HttpRequest; import org.xbill.DNS.Name; import com.eucalyptus.objectstorage.ObjectStorage; import com.eucalyptus.util.dns.DomainNames; import com.eucalyptus.ws.server.FilteredPipeline; import com.google.common.base.Splitter; import com.google.common.collect.Iterables; import javax.annotation.Nullable; import java.util.Set; /** * Base class for all ObjectStorageGateway REST pipelines. * @author zhill * */ public abstract class ObjectStorageRESTPipeline extends FilteredPipeline { private static Logger LOG = Logger.getLogger(ObjectStorageRESTPipeline.class); private static final Splitter hostSplitter = Splitter.on(':').limit(2); private static final Set<String> servicePaths = Sets .newHashSet(ComponentIds.lookup(ObjectStorage.class).getServicePath(), "/services/Walrus"); public static Set<String> getServicePaths() { return servicePaths; } /** * Does not accept any SOAP requests * * Two options: path-style or virtual-hosted. * * Path Style: objectstorage.hostname.com/bucket if using DNS, 192.168.1.1/services/ObjectStorage/bucket if not DNS * * Virtual-hosted: objectstorage.walrus.hostname.com/ if using DNS, not-applicable if not using DNS */ @Override public boolean checkAccepts(HttpRequest message) { String uriPath = message.getUri(); uriPath = (uriPath == null ? "" : uriPath); String hostHeader = message.getHeader(HttpHeaders.Names.HOST); hostHeader = (hostHeader == null ? "" : hostHeader); return (!isSoapRequest(message) && (isObjectStorageHostName(hostHeader) || isObjectStorageServicePathRequest(uriPath, hostHeader))); } private static boolean isSoapRequest(HttpRequest message) { return message.getHeaderNames().contains("SOAPAction"); } /** * The service path is the prefix for the URI and DNS is not used (if DNS used then it could be a bucket/key name) */ private boolean isObjectStorageServicePathRequest(final String uriPath, final String hostHeader) { final Predicate<String> matchUriPredicate = new Predicate<String>() { @Override public boolean apply(@Nullable String s) { return checkServicePathUri(uriPath, s); } }; return !isObjectStorageHostName(hostHeader) && Iterators.any(servicePaths.iterator(), matchUriPredicate); } private boolean checkServicePathUri(final String uriPath, final String servicePath) { String tmpUri = uriPath; if (!tmpUri.endsWith("/")) { tmpUri += "/"; //Ensure a trailing / for check } return tmpUri.startsWith(servicePath + "/"); } /** * Returns whether or not the host header resolves to ObjectStorage * @param hostHeader * @return */ private boolean isObjectStorageHostName(String hostHeader) { //Try both the raw name as well as a bucket-stripped version in case using virtual-hosting style. return this.resolvesByHost(hostHeader) || this.maybeBucketHostedStyle(hostHeader); } /** * Is ObjectSTorage domainname a subdomain of the host header host. If so, then it is likely a bucket prefix. * Includes checksd for Walrus domain (walrus.myserver.com) for legacy support * But, since S3 buckets can include '.' can't just parse on '.'s * @param fullHostHeader * @return */ private boolean maybeBucketHostedStyle(String fullHostHeader) { try { return DomainNames .absolute( Name.fromString(Iterables.getFirst(hostSplitter.split(fullHostHeader), fullHostHeader))) .subdomain(DomainNames.externalSubdomain(ObjectStorage.class)) || DomainNames .absolute(Name.fromString( Iterables.getFirst(hostSplitter.split(fullHostHeader), fullHostHeader))) .subdomain(Name.fromString("walrus." + DomainNames.externalSubdomain().toString())); } catch (Exception e) { LOG.error("Error parsing domain name from hostname: " + fullHostHeader, e); return false; } } }