📄 linksubstitution.java
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/*
* File : $Source: /usr/local/cvs/opencms/src/com/opencms/util/LinkSubstitution.java,v $
* Date : $Date: 2002/04/10 08:22:11 $
* Version: $Revision: 1.19 $
*
* This library is part of OpenCms -
* the Open Source Content Mananagement System
*
* Copyright (C) 2001 The OpenCms Group
*
* 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 OpenCms, please see the
* OpenCms 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 com.opencms.util;
import com.opencms.file.CmsObject;
import com.opencms.core.*;
import com.opencms.file.CmsStaticExport;
import com.opencms.htmlconverter.*;
import org.apache.oro.text.perl.*;
import javax.servlet.http.*;
import java.net.*;
import java.io.*;
import java.util.*;
/**
* Title: OpenCms
* Description:
* @author Hanjo Riege
* @version 1.0
*/
public class LinkSubstitution {
/**
* Reference to the CmsElementCache object containing locators for all
* URIs and elements in cache.
*/
private static Perl5Util c_perlUtil = null;
public LinkSubstitution() {
c_perlUtil = new Perl5Util();
}
/**
* Parses the content of the body tag of a html page. It is the same as
* substituteEditorContent except that it expects only the part of the
* html page between the body tags.
*/
public String substituteEditorContentBody(CmsObject cms, String body) throws CmsException{
// we have to prepare the content for the tidy
body = "<html><head></head><body>" + body + "</body></html>";
// start the tidy
String result = substituteEditorContent(cms, body);
// remove the preparetags
int startIndex = result.indexOf("<body");
startIndex = result.indexOf(">", startIndex + 1) + 1;
int endIndex = result.lastIndexOf("</body>");
if(startIndex > 0) {
result = result.substring(startIndex, endIndex);
}
return result;
}
/**
* parses the html content from the editor. It replaces the links in <a href=""
* and in <image src="". They will be replaced with ]]><LINK> path in opencms <LINK><![CDATA[
*/
public String substituteEditorContent(CmsObject cms, String content)throws CmsException{
return substituteEditorContent(cms, content, null);
}
/**
* parses the html content from the editor. It replaces the links in <a href=""
* and in <image src="". They will be replaced with ]]><LINK> path in opencms <LINK><![CDATA[
*/
public String substituteEditorContent(CmsObject cms, String content, String path)throws CmsException{
CmsHtmlConverter converter = new CmsHtmlConverter();
String retValue = null;
if(path == null || "".equals(path)){
path = "/";
}
try{
//converter.setTidyConfFile("/andzah/projekte/ebk/config.txt");
if(converter.hasErrors(content)){
String errors = converter.showErrors(content);
throw new CmsException(errors);
}
converter.setConverterConfString("<?xml version=\"1.0\"?>"+
"<converterconfig>"+
" <defaults>"+
" <xhtmloutput value=\"false\"/>"+
" <globalprefix value=\"\"/>"+
" <globalsuffix value=\"\"/>"+
" <globaladdeveryline value=\"false\"/>"+
" <usebrackets value=\"true\" openbracket=\"#(\" closebracket=\")#\"/>"+
" <encodequotationmarks value=\"false\"/>"+
" </defaults>"+
" <replacecontent>"+
" <string content=\"&mdash;\" replace=\"$mdash$\"/>"+
" <string content=\"&ndash;\" replace=\"$ndash$\"/>"+
" <string content=\"&bull;\" replace=\"$bull$\"/>"+
" <string content=\"&#\" replace=\"$Sonder$\"/>"+
" </replacecontent>"+
" <replacestrings usedefaults=\"true\">"+
" <string content=\"$Sonder$\" replace=\"&#\"/>"+
" <string content=\"$mdash$\" replace=\"&mdash;\"/>"+
" <string content=\"$ndash$\" replace=\"&ndash;\"/>"+
" <string content=\"$bull$\" replace=\"&bull;\"/>"+
" </replacestrings>"+
" <inlinetags>"+
" <tag name=\"img\"/>"+
" <tag name=\"br\"/>"+
" <tag name=\"hr\"/>"+
" <tag name=\"input\"/>"+
" <tag name=\"frame\"/>"+
" <tag name=\"meta\"/>"+
" </inlinetags>"+
" <replacetags usedefaults=\"true\">"+
" <tag name=\"img\" attrib=\"src\" replacestarttag=\"]]><LINK><![CDATA[$parameter$]]></LINK><![CDATA[\" parameter=\"src\" replaceparamattr=\"true\"/>"+
" <tag name=\"a\" attrib=\"href\" replacestarttag=\"]]><LINK><![CDATA[$parameter$]]></LINK><![CDATA[\" replaceendtag=\"</a>\" parameter=\"href\" replaceparamattr=\"true\"/>"+
" </replacetags>"+
"</converterconfig>");
// get parameter to create the url object of the edited file
String servletPrefix = cms.getRequestContext().getRequest().getServletUrl();
String prot = ((HttpServletRequest)cms.getRequestContext().getRequest().getOriginalRequest()).getScheme();
String host = ((HttpServletRequest)cms.getRequestContext().getRequest().getOriginalRequest()).getServerName();
int port = ((HttpServletRequest)cms.getRequestContext().getRequest().getOriginalRequest()).getServerPort();
URL urltool = new URL(prot, host, port, servletPrefix + path);
converter.setServletPrefix(servletPrefix);
converter.setOriginalUrl(urltool);
retValue = converter.convertHTML(content);
}catch ( Exception e ){
throw new CmsException("["+this.getClass().getName()+"] cant convert the editor content:"+e.toString());
}
return retValue;
}
/**
* Replaces the link according to the rules and registers it to the
* requestcontex if we are in export modus.
* @param cms. The cms object.
* @param link. The link to process.
* @return String The substituded link.
*/
public String getLinkSubstitution(CmsObject cms, String link){
if(link == null || "".equals(link)){
return "";
}
if(!link.startsWith("/")){
// this is a relative link. Lets make an absolute out of it
link = Utils.mergeAbsolutePath(cms.getRequestContext().getRequest().getRequestedResource(), link);
}
// first ask if this is the export
int modus = cms.getMode();
if(modus == cms.C_MODUS_EXPORT){
// we have to register this link to the requestcontex
cms.getRequestContext().addLink(link);
// and we have to process the startrule
String startRule = OpenCms.getStaticExportProperties().getStartRule();
if(startRule != null && !"".equals(startRule)){
try{
link = c_perlUtil.substitute(startRule, link);
}catch(Exception e){
if(I_CmsLogChannels.C_PREPROCESSOR_IS_LOGGING && A_OpenCms.isLogging() ) {
A_OpenCms.log(I_CmsLogChannels.C_OPENCMS_CRITICAL, "["+this.getClass().getName()+"] problems with startrule:\""+startRule+"\" (" + e + "). ");
}
}
}
}
// check if we are in a https page (then we have to set the http
// protocol ahead the "not-https-links" in this page
boolean httpsMode = false;
if(modus == cms.C_MODUS_ONLINE){
// https pages are always online
String scheme = ((HttpServletRequest)cms.getRequestContext().getRequest().getOriginalRequest()).getScheme();
if("https".equalsIgnoreCase(scheme)){
httpsMode = true;
}
}
boolean needsScheme = true;
if(httpsMode){
needsScheme = CmsStaticExport.needsScheme(link);
}
String[] rules = cms.getStaticExportProperties().getLinkRules(modus);
if(rules == null || rules.length == 0){
return link;
}
String retValue = link;
for(int i=0; i<rules.length; i++){
try{
boolean nextRule = true;
if("*dynamicRules*".equals(rules[i])){
// here we go trough our dynamic rules
Vector booleanReplace = new Vector();
retValue = CmsStaticExport.handleDynamicRules(cms, link, modus, booleanReplace);
Boolean goOn =(Boolean)booleanReplace.firstElement();
if(goOn.booleanValue()){
link = retValue;
}else{
nextRule = false;
}
}else{
StringBuffer result = new StringBuffer();
int matches = c_perlUtil.substitute(result, rules[i], link);
if(matches != 0){
retValue = result.toString();
nextRule = false;
}
}
if(!nextRule){
// found the match
if(httpsMode && !retValue.startsWith("http")){
if(needsScheme){
retValue = cms.getStaticExportProperties().getUrlPrefixArray()[3] + retValue;
}
}else{
if(cms.getStaticExportProperties().relativLinksInExport() && modus == cms.C_MODUS_EXPORT
&& (retValue != null) && retValue.startsWith(cms.getStaticExportProperties().getUrlPrefixArray()[0])){
// we want the path relative
retValue = getRelativePath(cms.getRequestContext().getRequest().getRequestedResource(), retValue.substring((cms.getStaticExportProperties().getUrlPrefixArray()[0]).length()));
}
}
return retValue;
}
}catch(MalformedPerl5PatternException e){
if(I_CmsLogChannels.C_PREPROCESSOR_IS_LOGGING && A_OpenCms.isLogging() ) {
A_OpenCms.log(I_CmsLogChannels.C_OPENCMS_CRITICAL, "["+this.getClass().getName()+"] problems with rule:\""+rules[i]+"\" (" + e + "). ");
}
}
}
if(httpsMode && !retValue.startsWith("http")){
if(needsScheme){
retValue = cms.getStaticExportProperties().getUrlPrefixArray()[3] + retValue;
}
}else{
if(cms.getStaticExportProperties().relativLinksInExport() && modus == cms.C_MODUS_EXPORT && (retValue != null) && retValue.startsWith(cms.getStaticExportProperties().getUrlPrefixArray()[0])){
// we want the path relative
retValue = getRelativePath(cms.getRequestContext().getRequest().getRequestedResource(), retValue.substring((cms.getStaticExportProperties().getUrlPrefixArray()[0]).length()));
}
}
return retValue;
}
/**
* This methood calculates the relative path to a resource in OpenCms
* depending on the page where it is used.
* i.e.: baseFile = "/folder1/folder2/index.html"
* linkTarget= "/folder1/pics/pic.gif"
* returns: "../pics/pic.gif"
*
* @param baseFile: the name(incl. path) of the page containing the link
* @param linkTarget: the name(incl. path) of the resource to link to.
*
* @return the relative path to the target resource.
*/
public String getRelativePath(String baseFile, String linkTarget){
// use tokenizer for better performance
java.util.StringTokenizer cur = new java.util.StringTokenizer(baseFile, "/");
java.util.StringTokenizer tar = new java.util.StringTokenizer(linkTarget,"/");
// get the minimum of the number of tokens for both paths
int maxAllowed = cur.countTokens();
if(maxAllowed > tar.countTokens()){
maxAllowed = tar.countTokens();
}
// serch for the part of the path they have in common.
String currentToken = cur.nextToken();
String targetToken = tar.nextToken();
int counter = 1;
while(currentToken.equals(targetToken) && counter < maxAllowed){
currentToken = cur.nextToken();
targetToken = tar.nextToken();
counter++;
}
StringBuffer result = new StringBuffer();
// link to the shared root path
counter = cur .countTokens();
for(int i=0; i < counter; i++){
result.append("../");
}
// finaly add the link to the target from the shared root path
result.append(targetToken);
while(tar.hasMoreTokens()){
result.append("/" +tar.nextToken());
}
return result.toString();
}
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