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Draft of Http ContentStore

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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 2007-06-18 00:09:20 +00:00
parent f163374aca
commit 0a95689a7e
2 changed files with 276 additions and 0 deletions
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170
source/java/org/alfresco/repo/content/http/HttpAlfrescoContentReader.java Normal file
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/*
* Copyright (C) 2005-2007 Alfresco Software Limited.
*
* 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; either version 2
* of the License, or (at your option) any later version.
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* http://www.alfresco.com/legal/licensing"
*/
package org.alfresco.repo.content.http;
import java.nio.channels.ReadableByteChannel;
import java.text.MessageFormat;
import javax.servlet.http.HttpServletResponse;
import net.sf.acegisecurity.Authentication;
import org.alfresco.error.AlfrescoRuntimeException;
import org.alfresco.repo.content.AbstractContentReader;
import org.alfresco.repo.security.authentication.AuthenticationComponent;
import org.alfresco.repo.security.authentication.AuthenticationUtil;
import org.alfresco.repo.security.authentication.TicketComponent;
import org.alfresco.service.cmr.repository.ContentIOException;
import org.alfresco.service.cmr.repository.ContentReader;
import org.alfresco.service.cmr.security.AuthenticationService;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
/**
* The reader that does the actual communication with the Alfresco HTTP
* application.
*
* @see HttpAlfrescoStore
* @since 2.1
* @author Derek Hulley
*/
public class HttpAlfrescoContentReader extends AbstractContentReader
{
private static final String DEFAULT_URL = "{0}/dr?contentUrl={1}?ticket={2}";
private static final String INFO_ONLY = "?infoOnly=true";
AuthenticationService authenticationService;
AuthenticationComponent authenticationComponent;
private String baseHttpUrl;
private String contentUrl;
// Helpers
private HttpClient httpClient;
public HttpAlfrescoContentReader(
AuthenticationService authenticationService,
AuthenticationComponent authenticationComponent,
String baseHttpUrl,
String contentUrl)
{
super(contentUrl);
this.authenticationService = authenticationService;
this.authenticationComponent = authenticationComponent;
this.baseHttpUrl = baseHttpUrl;
this.contentUrl = contentUrl;
// Helpers
this.httpClient = new HttpClient();
}
@Override
public String toString()
{
StringBuilder sb = new StringBuilder(100);
sb.append("HttpAlfrescoContentReader")
.append("[ contentUrl=").append(getContentUrl())
.append("]");
return sb.toString();
}
public boolean exists()
{
// Authenticate as the system user for the call
Authentication authentication = null;
GetMethod method = null;
try
{
authenticationComponent.setSystemUserAsCurrentUser();
String ticket = authenticationService.getCurrentTicket();
String url = HttpAlfrescoContentReader.generateURL(baseHttpUrl, contentUrl, ticket, true);
method = new GetMethod(url);
int statusCode = httpClient.executeMethod(method);
if (statusCode == HttpServletResponse.SC_NO_CONTENT)
{
return false;
}
else
{
return true;
}
}
catch (Throwable e)
{
throw new AlfrescoRuntimeException("Reader exists check failed: " + this);
}
finally
{
if (method != null)
{
try { method.releaseConnection(); } catch (Throwable e) {}
}
authenticationComponent.setCurrentAuthentication(authentication);
}
}
public long getLastModified()
{
throw new UnsupportedOperationException();
}
public long getSize()
{
throw new UnsupportedOperationException();
}
@Override
protected ContentReader createReader() throws ContentIOException
{
throw new UnsupportedOperationException();
}
@Override
protected ReadableByteChannel getDirectReadableChannel() throws ContentIOException
{
throw new UnsupportedOperationException();
}
/**
* Helper to generate a URL based on the ContentStore URL and ticket.
*
* @param baseHttpUrl the first part of the URL pointing to the Alfresoc Web Application
* @param contentUrl the content URL - never null
* @param ticket the authentication ticket
* @param infoOnly <tt>true</tt> to add the info-only flag
*
* @return Returns the URL with which to access the servlet
*/
public final static String generateURL(String baseHttpUrl, String contentUrl, String ticket, boolean infoOnly)
{
String url = MessageFormat.format(
DEFAULT_URL,
baseHttpUrl, contentUrl, ticket);
if (infoOnly)
{
url += INFO_ONLY;
}
return url;
}
}

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source/java/org/alfresco/repo/content/http/HttpAlfrescoStore.java Normal file
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/*
* Copyright (C) 2005-2007 Alfresco Software Limited.
*
* 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; either version 2
* of the License, or (at your option) any later version.
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* As a special exception to the terms and conditions of version 2.0 of
* the GPL, you may redistribute this Program in connection with Free/Libre
* and Open Source Software ("FLOSS") applications as described in Alfresco's
* FLOSS exception. You should have recieved a copy of the text describing
* the FLOSS exception, and it is also available here:
* http://www.alfresco.com/legal/licensing"
*/
package org.alfresco.repo.content.http;
import org.alfresco.repo.content.AbstractContentStore;
import org.alfresco.repo.security.authentication.AuthenticationComponent;
import org.alfresco.service.cmr.repository.ContentReader;
import org.alfresco.service.cmr.security.AuthenticationService;
/**
* A read-only store using HTTP to access content from a remote Alfresco application.
* <p>
* The primary purpose of this component is to allow clustered content sharing without
* having to have shared access to the binary data on the various machines.
*
* @since 2.1
* @author Derek Hulley
*/
public class HttpAlfrescoStore extends AbstractContentStore
{
AuthenticationComponent authenticationComponent;
AuthenticationService authenticationService;
private String baseHttpUrl;
/**
* Default constructor for bean instantiation.
*/
public HttpAlfrescoStore()
{
}
/**
* @param authenticationComponent the authentication compoent
*/
public void setAuthenticationComponent(AuthenticationComponent authenticationComponent)
{
this.authenticationComponent = authenticationComponent;
}
/**
* @param authenticationService used to retrieve authentication ticket
*/
public void setAuthenticationService(AuthenticationService authenticationService)
{
this.authenticationService = authenticationService;
}
/**
* Set the base HTTP URL of the remote Alfresco application.
*
* @param baseHttpUrl the remote HTTP address including the <b>.../alfresco</b>
*/
public void setBaseHttpUrl(String baseHttpUrl)
{
if (baseHttpUrl.endsWith("/"))
{
baseHttpUrl = baseHttpUrl.substring(0, baseHttpUrl.length() - 1);
}
this.baseHttpUrl = baseHttpUrl;
}
/**
* This <b>is</b> a read only store.
*
* @return <tt>false</tt> always
*/
public boolean isWriteSupported()
{
return false;
}
/**
* {@inheritDoc}
*/
public ContentReader getReader(String contentUrl)
{
ContentReader reader = new HttpAlfrescoContentReader(
authenticationService,
authenticationComponent,
baseHttpUrl,
contentUrl);
return reader;
}
}