cmsnewresourceexternallink.java

cms是开源的框架

/*
* File   : $Source: /usr/local/cvs/opencms/src-modules/com/opencms/workplace/CmsNewResourceExternallink.java,v $
* Date   : $Date: 2005/06/27 23:22:07 $
* Version: $Revision: 1.5 $
*
* 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.workplace;

import org.opencms.file.CmsFile;
import org.opencms.file.CmsFolder;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsPropertyDefinition;
import org.opencms.file.CmsResource;
import org.opencms.file.types.CmsResourceTypePointer;
import org.opencms.i18n.CmsEncoder;
import org.opencms.main.CmsException;
import org.opencms.workplace.CmsWorkplaceSettings;

import com.opencms.core.I_CmsSession;
import com.opencms.legacy.CmsLegacyException;
import com.opencms.legacy.CmsXmlTemplateLoader;
import com.opencms.template.A_CmsXmlContent;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

/**
 * Template class for displaying the new resource screen for a new link
 * of the OpenCms workplace.<P>
 * Reads template files of the content type <code>CmsXmlWpTemplateFile</code>.
 *
 * @author Michael Emmerich
 * @version $Revision: 1.5 $ $Date: 2005/06/27 23:22:07 $
 */

public class CmsNewResourceExternallink extends CmsWorkplaceDefault {
    
    private static final String C_PARA_KEEP_PROPERTIES = "keepproperties";
    private static final String C_PARA_ADD_TO_NAV = "addtonav";
    private static final int DEBUG = 0;

    /**
     * Overwrites the getContent method of the CmsWorkplaceDefault.<br>
     * Gets the content of the new resource othertype template and processed the data input.
     * @param cms The CmsObject.
     * @param templateFile The lock template file
     * @param elementName not used
     * @param parameters Parameters of the request and the template.
     * @param templateSelector Selector of the template tag to be displayed.
     * @return Bytearry containing the processed data of the template.
     * @throws Throws CmsException if something goes wrong.
     */

    public byte[] getContent(CmsObject cms, String templateFile, String elementName,
            Hashtable parameters, String templateSelector) throws CmsException {

        String error = "";
        boolean checkurl = true;

        String filename = null;
        String targetName = null;
        String foldername = null;
        // String type = null;
        I_CmsSession session = CmsXmlTemplateLoader.getSession(cms.getRequestContext(), true);

        // get the document to display
        CmsXmlWpTemplateFile xmlTemplateDocument = new CmsXmlWpTemplateFile(cms, templateFile);
        CmsXmlLanguageFile lang = xmlTemplateDocument.getLanguageFile();

        // clear session values on first load
        String initial = (String)parameters.get(CmsWorkplaceDefault.C_PARA_INITIAL);
        if(initial != null){
            // remove all session values
            session.removeValue(CmsWorkplaceDefault.C_PARA_RESOURCE);
            session.removeValue(CmsWorkplaceDefault.C_PARA_LINK);
            session.removeValue(CmsWorkplaceDefault.C_PARA_VIEWFILE);
            session.removeValue(CmsWorkplaceDefault.C_PARA_NAVPOS);
            session.removeValue(CmsWorkplaceDefault.C_PARA_NAVTEXT);
            session.removeValue("lasturl");
        }
        // get the lasturl from parameters or from session
        String lastUrl = getLastUrl(cms, parameters);
        if(lastUrl != null){
            session.putValue("lasturl", lastUrl);
        }
        // get the linkname and the linkurl
        filename = CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getParameter(CmsWorkplaceDefault.C_PARA_RESOURCE);
        if(filename != null) {
            session.putValue(CmsWorkplaceDefault.C_PARA_RESOURCE, filename);
        }  else {
            // try to get the value from the session, e.g. after an error
            filename = (String)session.getValue(CmsWorkplaceDefault.C_PARA_RESOURCE)!=null?(String)session.getValue(CmsWorkplaceDefault.C_PARA_RESOURCE):"";
        }
        targetName = CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getParameter(CmsWorkplaceDefault.C_PARA_LINK);
        if(targetName != null) {
            session.putValue(CmsWorkplaceDefault.C_PARA_LINK, targetName);
        } else {
            // try to get the value from the session, e.g. after an error
            targetName = (String)session.getValue(CmsWorkplaceDefault.C_PARA_LINK)!=null?(String)session.getValue(CmsWorkplaceDefault.C_PARA_LINK):"";
        }
        
        // get the parameters
        String navtitle = (String)parameters.get(CmsWorkplaceDefault.C_PARA_NAVTEXT);
        if(navtitle != null) {
            session.putValue(CmsWorkplaceDefault.C_PARA_NAVTEXT, navtitle);
        } else {
            // try to get the value from the session, e.g. after an error
            navtitle = (String)session.getValue(CmsWorkplaceDefault.C_PARA_NAVTEXT)!=null?(String)session.getValue(CmsWorkplaceDefault.C_PARA_NAVTEXT):"";
        }
        
        String navpos = (String)parameters.get(CmsWorkplaceDefault.C_PARA_NAVPOS);
        if(navpos != null) {
            session.putValue(CmsWorkplaceDefault.C_PARA_NAVPOS, navpos);
        } else {
            // try to get the value from the session, e.g. after an error
            navpos = (String)session.getValue(CmsWorkplaceDefault.C_PARA_NAVPOS)!=null?(String)session.getValue(CmsWorkplaceDefault.C_PARA_NAVPOS):"";
        }
        
        String dummy = (String)parameters.get(CmsNewResourceExternallink.C_PARA_KEEP_PROPERTIES);
        if (DEBUG>0) System.out.println( "parameter " + CmsNewResourceExternallink.C_PARA_KEEP_PROPERTIES + ": " + dummy );
        boolean keepTargetProperties = false;
        if (dummy!=null) {
        	session.putValue(CmsNewResourceExternallink.C_PARA_KEEP_PROPERTIES, dummy);
        }
        else {
        	dummy = (String)session.getValue(CmsNewResourceExternallink.C_PARA_KEEP_PROPERTIES)!=null?(String)session.getValue(CmsNewResourceExternallink.C_PARA_KEEP_PROPERTIES):"true";
        }
		keepTargetProperties = dummy.trim().equalsIgnoreCase("true");
        
        dummy = (String)parameters.get(CmsNewResourceExternallink.C_PARA_ADD_TO_NAV);
        if (DEBUG>0) System.out.println( "parameter " + CmsNewResourceExternallink.C_PARA_ADD_TO_NAV + ": " + dummy );
        boolean addToNav = false;
        if (dummy!=null) {
        	session.putValue(CmsNewResourceExternallink.C_PARA_ADD_TO_NAV, dummy);
        }
        else {
        	dummy = (String)session.getValue(CmsNewResourceExternallink.C_PARA_ADD_TO_NAV)!=null?(String)session.getValue(CmsNewResourceExternallink.C_PARA_ADD_TO_NAV):"false";
        }
		addToNav = dummy.trim().equalsIgnoreCase("true");        
        
        String notChange = (String)parameters.get("newlink");
        
        CmsResource linkResource = null;
        String step = CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getParameter("step");

        // set the values e.g. after an error
        xmlTemplateDocument.setData("LINKNAME", filename);
        xmlTemplateDocument.setData("LINKVALUE", targetName);
        xmlTemplateDocument.setData("NAVTITLE", CmsEncoder.escapeHtml(navtitle));
        xmlTemplateDocument.setData("KEEPPROPERTIES", keepTargetProperties==true ? "true" : "false" );
        xmlTemplateDocument.setData("ADDTONAV", addToNav==true ? "true" : "false" );

        // if an existing link should be edited show the change page
        if(notChange != null && notChange.equals("false") && step == null) {
            try{
                CmsFile currentFile = cms.readFile(filename);
                String content = new String(currentFile.getContents());
                xmlTemplateDocument.setData("LINKNAME", currentFile.getName());
                xmlTemplateDocument.setData("LINK", cms.getSitePath(currentFile));
                xmlTemplateDocument.setData("LINKVALUE", content);
                templateSelector = "change";
            } catch (CmsException e){
                error = e.getMessage();
            }
        }

        // get the current phase of this wizard
        if(step != null) {
            // step 1 - show the final selection screen
            if(step.equals("1") || step.equals("2")) {
                try{
                    // step 1 - create the link with checking http-link
                    // step 2 - create the link without link check
                    // get folder- and filename
                    // foldername = (String)session.getValue(C_PARA_FILELIST);
                    foldername = CmsWorkplaceAction.getCurrentFolder(CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getOriginalRequest());

                    if(foldername == null) {
                        foldername = cms.getSitePath(cms.readFolder("/"));
                    }

                    String title = lang.getLanguageValue("explorer.linkto") + " " + targetName;
                    // type = "link";
                    if(notChange != null && notChange.equals("false")) {
            
                        // change old file
                        CmsFile editFile = cms.readFile(filename);
                        editFile.setContents(targetName.getBytes());

                        if(step.equals("1")){
                            // TODO: write some better link check which will not fail if there is
                            // no access to the internet                            
                            //if(!targetName.startsWith("/")){
                            //    checkurl = CmsLinkCheck.checkUrl(targetName);
                            //}
                        }
                        checkurl=true;
                        if(checkurl){
                            cms.writeFile(editFile);
                            cms.writeProperty(filename, CmsPropertyDefinition.PROPERTY_TITLE, title);
                        }
                        linkResource = editFile;
                    } else {
                        // link URL is a file, so create the new file
                        List properties = null;
                        if (title != null) {
                            properties = new ArrayList();
                            properties.add(new org.opencms.file.CmsProperty(CmsPropertyDefinition.PROPERTY_TITLE, title, null));
                        } else {
                            properties = Collections.EMPTY_LIST;
                        } 
                        
                        checkurl=true;
                        
                        if (checkurl ) {                                                       
                            // TODO VFS links: creates an external HTTP link following the new linking paradigm
                            //linkResource = cms.createVfsLink(foldername + filename, targetName, targetProperties);
                            linkResource = cms.createResource(foldername + filename, CmsResourceTypePointer.getStaticTypeId());
                        }
                        
                 
                    }
                    // now check if navigation informations have to be added to the new page.
                    if(addToNav && checkurl) {
                        cms.writeProperty(cms.getSitePath(linkResource), CmsPropertyDefinition.PROPERTY_NAVTEXT, navtitle);
                        // update the navposition.
                        if(navpos != null) {
                            updateNavPos(cms, linkResource, navpos);
                        }
                    }

                    // remove values from session
                    session.removeValue(CmsWorkplaceDefault.C_PARA_RESOURCE);
                    session.removeValue(CmsWorkplaceDefault.C_PARA_VIEWFILE);
                    session.removeValue(CmsWorkplaceDefault.C_PARA_LINK);
                    session.removeValue(CmsWorkplaceDefault.C_PARA_NAVTEXT);
                    session.removeValue(CmsWorkplaceDefault.C_PARA_NAVPOS);

                    // now return to appropriate filelist
                } catch (CmsException e){
                    error = e.getMessage();
                }

                if(checkurl && ("".equals(error.trim()))){
                    try {
                        if(lastUrl != null) {
                            CmsXmlTemplateLoader.getResponse(cms.getRequestContext()).sendRedirect(lastUrl);
                        } else {
                            CmsXmlTemplateLoader.getResponse(cms.getRequestContext()).sendCmsRedirect(getConfigFile(cms).getWorkplaceActionPath()
                                    + CmsWorkplaceAction.getExplorerFileUri(CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getOriginalRequest()));
                        }
                    } catch(Exception e) {
                        throw new CmsLegacyException("Redirect fails :" + getConfigFile(cms).getWorkplaceActionPath()
                            + CmsWorkplaceAction.getExplorerFileUri(CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getOriginalRequest()), e);
                    }
                    return null;
                }
            }
        } else {
            session.removeValue(CmsWorkplaceDefault.C_PARA_RESOURCE);
            session.removeValue(CmsWorkplaceDefault.C_PARA_VIEWFILE);
            session.removeValue(CmsWorkplaceDefault.C_PARA_LINK);
            session.removeValue(CmsWorkplaceDefault.C_PARA_NAVTEXT);
        }
        // set lasturl
        if(lastUrl == null) {
            lastUrl = CmsWorkplaceAction.getExplorerFileUri(CmsXmlTemplateLoader.getRequest(cms.getRequestContext()).getOriginalRequest());
        }
        xmlTemplateDocument.setData("lasturl", lastUrl);
        // set the templateselector if there was an error
        if(!checkurl){
            xmlTemplateDocument.setData("folder", foldername);