cmslinkprocessor.java
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JAVA
465 行
/*
* File : $Source: /usr/local/cvs/opencms/src/org/opencms/staticexport/CmsLinkProcessor.java,v $
* Date : $Date: 2007-09-10 13:16:55 $
* Version: $Revision: 1.55 $
*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) 2002 - 2007 Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.staticexport;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsPropertyDefinition;
import org.opencms.file.wrapper.CmsObjectWrapper;
import org.opencms.i18n.CmsEncoder;
import org.opencms.main.CmsException;
import org.opencms.main.OpenCms;
import org.opencms.relations.CmsLink;
import org.opencms.relations.CmsRelationType;
import org.opencms.util.CmsHtmlParser;
import org.opencms.util.CmsMacroResolver;
import org.opencms.util.CmsRequestUtil;
import org.opencms.util.CmsStringUtil;
import java.util.Vector;
import org.htmlparser.Attribute;
import org.htmlparser.Node;
import org.htmlparser.Tag;
import org.htmlparser.tags.ImageTag;
import org.htmlparser.tags.LinkTag;
import org.htmlparser.tags.ObjectTag;
import org.htmlparser.util.ParserException;
import org.htmlparser.util.SimpleNodeIterator;
/**
* Implements the HTML parser node visitor pattern to
* exchange all links on the page.<p>
*
* @author Alexander Kandzior
*
* @version $Revision: 1.55 $
*
* @since 6.0.0
*/
public class CmsLinkProcessor extends CmsHtmlParser {
/** Constant for the attribute name. */
public static final String ATTRIBUTE_HREF = "href";
/** Constant for the attribute name. */
public static final String ATTRIBUTE_SRC = "src";
/** Constant for the attribute name. */
public static final String ATTRIBUTE_VALUE = "value";
/** HTML end. */
public static final String HTML_END = "</body></html>";
/** HTML start. */
public static final String HTML_START = "<html><body>";
/** Constant for the tag name. */
public static final String TAG_AREA = "AREA";
/** Constant for the tag name. */
public static final String TAG_EMBED = "EMBED";
/** Constant for the tag name. */
public static final String TAG_PARAM = "PARAM";
/** List of attributes that may contain links for the embed tag. */
private static final String[] EMBED_TAG_LINKED_ATTRIBS = new String[] {ATTRIBUTE_SRC, "pluginurl", "pluginspage"};
/** List of attributes that may contain links for the object tag ("codebase" has to be first). */
private static final String[] OBJECT_TAG_LINKED_ATTRIBS = new String[] {"codebase", "data", "datasrc"};
/** Processing mode "process links". */
private static final int PROCESS_LINKS = 1;
/** Processing mode "replace links". */
private static final int REPLACE_LINKS = 0;
/** The current users OpenCms context, containing the users permission and site root context. */
private CmsObject m_cms;
/** The selected encoding to use for parsing the HTML. */
private String m_encoding;
/** The link table used for link macro replacements. */
private CmsLinkTable m_linkTable;
/** Current processing mode. */
private int m_mode;
/** The relative path for relative links, if not set, relative links are treated as external links. */
private String m_relativePath;
/** Another OpenCms context based on the current users OpenCms context, but with the site root set to '/'. */
private CmsObject m_rootCms;
/**
* Creates a new link processor.<p>
*
* @param cms the current users OpenCms context
* @param linkTable the link table to use
* @param encoding the encoding to use for parsing the HTML content
* @param relativePath additional path for links with relative path (only used in "replace" mode)
*/
public CmsLinkProcessor(CmsObject cms, CmsLinkTable linkTable, String encoding, String relativePath) {
// echo mode must be on for link processor
super(true);
m_cms = cms;
if (m_cms != null) {
try {
m_rootCms = OpenCms.initCmsObject(cms);
m_rootCms.getRequestContext().setSiteRoot("/");
} catch (CmsException e) {
// this should not happen
m_rootCms = null;
}
}
m_linkTable = linkTable;
m_encoding = encoding;
m_relativePath = relativePath;
}
/**
* Escapes all <code>&</code>, e.g. replaces them with a <code>&</code>.<p>
*
* @param source the String to escape
* @return the escaped String
*/
public static String escapeLink(String source) {
if (source == null) {
return null;
}
StringBuffer result = new StringBuffer(source.length() * 2);
int terminatorIndex;
for (int i = 0; i < source.length(); ++i) {
char ch = source.charAt(i);
switch (ch) {
case '&':
// don't escape already escaped &s;
terminatorIndex = source.indexOf(';', i);
if (terminatorIndex > 0) {
String substr = source.substring(i + 1, terminatorIndex);
if ("amp".equals(substr)) {
result.append(ch);
} else {
result.append("&");
}
} else {
result.append("&");
}
break;
default:
result.append(ch);
}
}
return new String(result);
}
/**
* Unescapes all <code>&amp;</code>, that is replaces them with a <code>&</code>.<p>
*
* @param source the String to unescape
* @return the unescaped String
*/
public static String unescapeLink(String source) {
if (source == null) {
return null;
}
return CmsStringUtil.substitute(source, "&", "&");
}
/**
* Returns the link table this link processor was initialized with.<p>
*
* @return the link table this link processor was initialized with
*/
public CmsLinkTable getLinkTable() {
return m_linkTable;
}
/**
* Starts link processing for the given content in processing mode.<p>
*
* Macros are replaced by links.<p>
*
* @param content the content to process
* @return the processed content with replaced macros
*
* @throws ParserException if something goes wrong
*/
public String processLinks(String content) throws ParserException {
m_mode = PROCESS_LINKS;
return process(content, m_encoding);
}
/**
* Starts link processing for the given content in replacement mode.<p>
*
* Links are replaced by macros.<p>
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