filemanager_engine.java

java 写的一个新闻发布系统

//
//                                   ____.
//                       __/\ ______|    |__/\.     _______
//            __   .____|    |       \   |    +----+       \
//    _______|  /--|    |    |    -   \  _    |    :    -   \_________
//   \\______: :---|    :    :           |    :    |         \________>
//           |__\---\_____________:______:    :____|____:_____\
//                                      /_____|
//
//                 . . . i n   j a h i a   w e   t r u s t . . .
//

//
//  Filemanger_Engine
//  NK  10.02.2001
//
//

package org.jahia.engines.filemanager;

import java.io.*;
import java.util.*;                                 // HashMap
import javax.servlet.*;			          // ServletContext
import javax.servlet.http.*;            // HttpServletRequest
import org.jahia.tools.files.*;           // FileUpload

import org.jahia.exceptions.*;                  // JahiaException
import org.jahia.exceptions.JahiaSessionExpirationException;

import org.jahia.utils.*;                       // JahiaConsole
import org.jahia.data.*;                        // JahiaData
import org.jahia.services.pages.JahiaPage;
import org.jahia.data.fields.*;                 // JahiaField, FieldTypes
import org.jahia.data.files.*;                 	// JahiaFile, JahiaFileField
import org.jahia.data.containers.*;             // JahiaContainer
import org.jahia.params.*;                      // ParamBean
import org.jahia.registries.*;                  // ServicesRegistry
import org.jahia.engines.*;                     // JahiaEngine interface
import org.jahia.engines.shared.*;              // SmallText, BigText, etc.
import org.jahia.data.events.*;                 // JahiaEvent
import org.jahia.engines.rights.*;              // ViewRights
import org.jahia.services.acl.*;
import org.jahia.services.filemanager.*;



/**
 * Handle file upload, download, virtual folder structure
 *
 * @author Khue ng
 * @version 1.0
 */
public class Filemanager_Engine implements JahiaEngine {

    private static final String CLASS_NAME = "Filemanager_Engine";

    private static Filemanager_Engine m_Instance = null;
    private static String engineName  = "filemanager";
    private EngineToolBox toolBox;

    private static final String TEMPLATE_JSP  			= "filemanager";
    private static final String FILEUPLOAD_JSP   		= "filemanager_fileupload";
    private static final String FILEDELETE_JSP   		= "filemanager_filedelete";
    private static final String RELOADPAGE_JSP   		= "filemanager_reloadpage";
    private static final String ERROR_JSP   			= "filemanager_error";
    private static final String CLOSE_JSP   			= "filemanager_close";

    /** The requested action **/
    private final String ACTION_REQ = "actionreq";
    private final String SUB_ACTION	= "subAction";

    private final String ACTION_FM_CREATE      	= "actionFilemanagerCreate";
    private final String ACTION_FOLDER_OPEN   	= "actionFolderOpen";
    private final String ACTION_FILE_UPLOAD    	= "actionFileUpload";
    private final String ACTION_FILE_DOWNLOAD  	= "actionFileDownload";
    private final String ACTION_FILE_DELETE    	= "actionFileDelete";
    private final String ACTION_FILE_MOVE      	= "actionFileMove";
    private final String ACTION_FILE_EDIT      	= "actionFileEdit";
    private final String ACTION_FILE_EDITSAVE  	= "actionFileEditSave";
    private final String ACTION_FILE_COPY      	= "actionFileCopy";
    private final String ACTION_FOLDER_CREATE  	= "actionFolderCreate";
    private final String ACTION_FOLDER_DELETE  	= "actionFolderDelete";
    private final String ACTION_FOLDER_MOVE    	= "actionFolderMove";
    private final String ACTION_FOLDER_RENAME  	= "actionFolderRename";

    /** form parameter name for folder id **/
    private final String FORM_FOLDERID = "active_folder_id";
    /** form parameter name for new folder name **/
    private final String FORM_NEWFOLDERNAME = "foldername";
    /** form parameter name for files list **/
    private final String FORM_FILESLIST = "filesList";
    /** form parameter name for a file item **/
    private final String FORM_FILE_ITEM = "fileItem";
    /** form parameter file url **/
    private final String FORM_FILE_FILENAME = "filename";
    /** form parameter file title **/
    private final String FORM_FILE_TITLE = "fileTitle";
    /** form parameter file edit action **/
    private final String FORM_FILE_EDIT_ACTION = "editAction";
    /** form parameter file move action **/
    private final String FORM_FILE_MOVE_ACTION = "moveAction";
    /** form parameter folder sub action **/
    private final String FORM_FOLDER_SUB_ACTION = "subAction";
    /** form parameter folder move action **/
    private final String FORM_FOLDER_MOVE_ACTION = "moveAction";
    /** form parameter name for file move destination folder **/
    private final String FORM_FILE_MOVE_DESTINATION_FOLDER = "fileMoveDestinationFolder";
    /** form parameter name for folder move destination folder **/
    private final String FORM_FOLDER_MOVE_DESTINATION_FOLDER = "folderMoveDestinationFolder";

    /** display all folder's children **/
    private final String DEPLOY_ALL_BRANCH = "allBranch";

    /** display only children folders for active folder branch **/
    private final String DEPLOY_ONLY_ONE_BRANCH = " oneBranch";



    /***
     * constructor
     *
     */
    protected Filemanager_Engine()
    {
        // JahiaConsole.println( "Engine",
        //                        "***** Starting Filemanager Engine *****" );
        toolBox = EngineToolBox.getInstance();
    } // end constructor



    /***
     * returns a single instance of the object
     *
     */
    public static synchronized Filemanager_Engine getInstance()
    {
        if (m_Instance == null) {
            m_Instance = new Filemanager_Engine();
        }
        return m_Instance;
    } // end getInstance



    /***
     * authoriseRender
     *
     */
    public boolean authoriseRender( ParamBean jParams )
    {
        return toolBox.authoriseRender( jParams );
    } // end authoriseRender



    /***
     * renderLink
     *
     */
    public String renderLink( ParamBean jParams, Object theObj )
    throws JahiaException
    {

//       	String params = "&mode=display";
        String params = "?mode=display";

        Vector datas = (Vector)theObj;
        if ( datas != null ){

            String action = (String)datas.get(0);

            if ( action != null && (action.length()>0) ){

                if ( action.equals("actionFileDownload") ){

                    params = "";
                    //JahiaConsole.println("FileManager_Engine.renderLink"," action is fileDownload");

                    JahiaField theField = (JahiaField)datas.get(1);

                    if ( theField != null ){

                        JahiaFileField fField = (JahiaFileField)theField.getObject();
                        if ( fField != null ){
                            int fileID = fField.getFileID();
                            JahiaFile f = ServicesRegistry.getInstance().getJahiaFilemanagerService().getFileDB(fileID);
                            if ( f != null ){
                                String escapedFileName = java.net.URLEncoder.encode(f.getRealName());
                                // this next line is an ugly hack required because
                                // of the evolution of the use of RFC 1738 to
                                // encoding spaces with %20.
                                escapedFileName = JahiaTools.replacePattern(escapedFileName, "+", "%20");
                                params = "/" + escapedFileName + params;
                                action +=  "&fid=" +  theField.getID();
                            } else {
                                action = "";
                            }
                        } else {
                            action ="";
                        }
                    }
                }

                if ( action != null & action.length()>0 ){
                    params += "?" + ACTION_REQ + "=" + action;
                }
            }
        }


        String theUrl = "";
        if ( jParams != null ){
            theUrl =  jParams.composeEngineUrl( engineName, params );
        }

        return theUrl	;

    } // end renderLink


    /***
     * needsJahiaData
     *
     */
    public boolean needsJahiaData( ParamBean jParams )
    {
        return false;
    } // end needsJahiaData



    /***
     * handdles the engine actions
     *
     * @param        jParams             a ParamBean object
     * @param        jData               a JahiaData object (not mandatory)
     *
     */
    public void handleActions( ParamBean jParams, JahiaData jData )
    throws JahiaException
    {

        HashMap engineMap = initEngineMap( jParams );
        boolean displayScreen = true;

        String action = jParams.getParameter(ACTION_REQ);
        //JahiaConsole.println("FilemanagerEngine.handleActions","actionreq= " + action);
        if ( action != null ){

            if ( action.equals(ACTION_FILE_UPLOAD) ){
                handleFileUpload(jParams,engineMap);
            } else if ( action.equals(ACTION_FILE_DOWNLOAD) ){

                if ( handleFileDownload(jParams,engineMap) ){
                    displayScreen = false;
                }

            } else if ( action.equals(ACTION_FILE_DELETE) ){
                handleFileDelete(jParams,engineMap);
            }  else {
                // the files list for a gived page and all files made public
                Vector v = ServicesRegistry.getInstance()
                                                  .getJahiaFilemanagerService()
                                                  .getFilesByPage(jParams.getSiteID(),jParams.getPageID(),true);

                Vector filesList = new Vector();

                if ( jParams.getUser().isAdminMember(jParams.getSiteID()) ){
                    filesList = v;
                } else {
                    int size = v.size();
                    JahiaFile jf = null;
                    for (int i=0 ; i<size ; i++){
                        jf = (JahiaFile)v.get(i);
                        if ( jf.getUploadUser().equals(jParams.getUser().getName()) ){
                            filesList.add(jf);
                        }
                    }
                }
                engineMap.put( "filesList", filesList.elements() );

                // undefined action
                engineMap.put("fmMsg","");
                engineMap.put( "jspSource", TEMPLATE_JSP );

            }
        } else {