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Draft of Http ContentStore
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5999 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Derek Hulley
parent
f163374aca
commit
0a95689a7e
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/*
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* Copyright (C) 2005-2007 Alfresco Software Limited.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* As a special exception to the terms and conditions of version 2.0 of
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* the GPL, you may redistribute this Program in connection with Free/Libre
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* and Open Source Software ("FLOSS") applications as described in Alfresco's
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* FLOSS exception. You should have recieved a copy of the text describing
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* the FLOSS exception, and it is also available here:
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* http://www.alfresco.com/legal/licensing"
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*/
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package org.alfresco.repo.content.http;
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import java.nio.channels.ReadableByteChannel;
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import java.text.MessageFormat;
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import javax.servlet.http.HttpServletResponse;
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import net.sf.acegisecurity.Authentication;
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import org.alfresco.error.AlfrescoRuntimeException;
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import org.alfresco.repo.content.AbstractContentReader;
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import org.alfresco.repo.security.authentication.AuthenticationComponent;
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import org.alfresco.repo.security.authentication.AuthenticationUtil;
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import org.alfresco.repo.security.authentication.TicketComponent;
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import org.alfresco.service.cmr.repository.ContentIOException;
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import org.alfresco.service.cmr.repository.ContentReader;
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import org.alfresco.service.cmr.security.AuthenticationService;
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import org.apache.commons.httpclient.HttpClient;
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import org.apache.commons.httpclient.HttpException;
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import org.apache.commons.httpclient.methods.GetMethod;
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/**
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* The reader that does the actual communication with the Alfresco HTTP
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* application.
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*
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* @see HttpAlfrescoStore
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* @since 2.1
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* @author Derek Hulley
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*/
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public class HttpAlfrescoContentReader extends AbstractContentReader
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{
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private static final String DEFAULT_URL = "{0}/dr?contentUrl={1}?ticket={2}";
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private static final String INFO_ONLY = "?infoOnly=true";
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AuthenticationService authenticationService;
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AuthenticationComponent authenticationComponent;
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private String baseHttpUrl;
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private String contentUrl;
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// Helpers
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private HttpClient httpClient;
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public HttpAlfrescoContentReader(
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AuthenticationService authenticationService,
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AuthenticationComponent authenticationComponent,
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String baseHttpUrl,
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String contentUrl)
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{
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super(contentUrl);
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this.authenticationService = authenticationService;
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this.authenticationComponent = authenticationComponent;
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this.baseHttpUrl = baseHttpUrl;
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this.contentUrl = contentUrl;
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// Helpers
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this.httpClient = new HttpClient();
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}
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@Override
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public String toString()
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{
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StringBuilder sb = new StringBuilder(100);
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sb.append("HttpAlfrescoContentReader")
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.append("[ contentUrl=").append(getContentUrl())
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.append("]");
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return sb.toString();
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}
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public boolean exists()
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{
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// Authenticate as the system user for the call
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Authentication authentication = null;
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GetMethod method = null;
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try
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{
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authenticationComponent.setSystemUserAsCurrentUser();
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String ticket = authenticationService.getCurrentTicket();
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String url = HttpAlfrescoContentReader.generateURL(baseHttpUrl, contentUrl, ticket, true);
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method = new GetMethod(url);
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int statusCode = httpClient.executeMethod(method);
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if (statusCode == HttpServletResponse.SC_NO_CONTENT)
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{
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return false;
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}
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else
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{
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return true;
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}
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}
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catch (Throwable e)
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{
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throw new AlfrescoRuntimeException("Reader exists check failed: " + this);
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}
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finally
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{
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if (method != null)
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{
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try { method.releaseConnection(); } catch (Throwable e) {}
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}
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authenticationComponent.setCurrentAuthentication(authentication);
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}
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}
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public long getLastModified()
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{
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throw new UnsupportedOperationException();
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}
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public long getSize()
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{
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throw new UnsupportedOperationException();
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}
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@Override
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protected ContentReader createReader() throws ContentIOException
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{
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throw new UnsupportedOperationException();
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}
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@Override
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protected ReadableByteChannel getDirectReadableChannel() throws ContentIOException
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{
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throw new UnsupportedOperationException();
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}
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/**
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* Helper to generate a URL based on the ContentStore URL and ticket.
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*
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* @param baseHttpUrl the first part of the URL pointing to the Alfresoc Web Application
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* @param contentUrl the content URL - never null
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* @param ticket the authentication ticket
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* @param infoOnly <tt>true</tt> to add the info-only flag
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*
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* @return Returns the URL with which to access the servlet
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*/
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public final static String generateURL(String baseHttpUrl, String contentUrl, String ticket, boolean infoOnly)
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{
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String url = MessageFormat.format(
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DEFAULT_URL,
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baseHttpUrl, contentUrl, ticket);
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if (infoOnly)
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{
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url += INFO_ONLY;
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}
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return url;
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}
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}
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@ -0,0 +1,106 @@
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/*
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* Copyright (C) 2005-2007 Alfresco Software Limited.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* As a special exception to the terms and conditions of version 2.0 of
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* the GPL, you may redistribute this Program in connection with Free/Libre
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* and Open Source Software ("FLOSS") applications as described in Alfresco's
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* FLOSS exception. You should have recieved a copy of the text describing
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* the FLOSS exception, and it is also available here:
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* http://www.alfresco.com/legal/licensing"
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*/
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package org.alfresco.repo.content.http;
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import org.alfresco.repo.content.AbstractContentStore;
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import org.alfresco.repo.security.authentication.AuthenticationComponent;
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import org.alfresco.service.cmr.repository.ContentReader;
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import org.alfresco.service.cmr.security.AuthenticationService;
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/**
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* A read-only store using HTTP to access content from a remote Alfresco application.
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* <p>
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* The primary purpose of this component is to allow clustered content sharing without
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* having to have shared access to the binary data on the various machines.
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*
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* @since 2.1
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* @author Derek Hulley
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*/
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public class HttpAlfrescoStore extends AbstractContentStore
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{
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AuthenticationComponent authenticationComponent;
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AuthenticationService authenticationService;
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private String baseHttpUrl;
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/**
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* Default constructor for bean instantiation.
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*/
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public HttpAlfrescoStore()
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{
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}
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/**
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* @param authenticationComponent the authentication compoent
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*/
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public void setAuthenticationComponent(AuthenticationComponent authenticationComponent)
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{
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this.authenticationComponent = authenticationComponent;
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}
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/**
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* @param authenticationService used to retrieve authentication ticket
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*/
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public void setAuthenticationService(AuthenticationService authenticationService)
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{
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this.authenticationService = authenticationService;
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}
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/**
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* Set the base HTTP URL of the remote Alfresco application.
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*
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* @param baseHttpUrl the remote HTTP address including the <b>.../alfresco</b>
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*/
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public void setBaseHttpUrl(String baseHttpUrl)
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{
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if (baseHttpUrl.endsWith("/"))
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{
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baseHttpUrl = baseHttpUrl.substring(0, baseHttpUrl.length() - 1);
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}
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this.baseHttpUrl = baseHttpUrl;
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}
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/**
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* This <b>is</b> a read only store.
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*
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* @return <tt>false</tt> always
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*/
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public boolean isWriteSupported()
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{
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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public ContentReader getReader(String contentUrl)
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{
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ContentReader reader = new HttpAlfrescoContentReader(
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authenticationService,
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authenticationComponent,
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baseHttpUrl,
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contentUrl);
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return reader;
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}
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}
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