Java tutorial
/* * FCKeditor - The text editor for internet * Copyright (C) 2003-2005 Frederico Caldeira Knabben * * Licensed under the terms of the GNU Lesser General Public License: * http://www.opensource.org/licenses/lgpl-license.php * * For further information visit: * http://www.fckeditor.net/ * * File Name: ConnectorServlet.java * Java Connector for Resource Manager class. * * Version: 2.3 * Modified: 2005-08-11 16:29:00 * * File Authors: * Simone Chiaretta (simo@users.sourceforge.net) */ package com.baobao121.baby.common; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.apache.commons.fileupload.DiskFileUpload; import org.apache.commons.fileupload.FileItem; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; /** * Servlet to upload and browse files.<br> * * This servlet accepts 4 commands used to retrieve and create files and folders * from a server directory. The allowed commands are: * <ul> * <li>GetFolders: Retrive the list of directory under the current folder * <li>GetFoldersAndFiles: Retrive the list of files and directory under the * current folder * <li>CreateFolder: Create a new directory under the current folder * <li>FileUpload: Send a new file to the server (must be sent with a POST) * </ul> * * @author Simone Chiaretta (simo@users.sourceforge.net) */ public class ConnectorServlet extends HttpServlet { private static String baseDir; private static boolean debug = false; /** * Initialize the servlet.<br> * Retrieve from the servlet configuration the "baseDir" which is the root * of the file repository:<br> * If not specified the value of "/UserFiles/" will be used. * */ public void init() throws ServletException { baseDir = getInitParameter("baseDir"); debug = (new Boolean(getInitParameter("debug"))).booleanValue(); if (baseDir == null) baseDir = "/UserFiles/"; String realBaseDir = getServletContext().getRealPath(baseDir); File baseFile = new File(realBaseDir); if (!baseFile.exists()) { baseFile.mkdir(); } } /** * Manage the Get requests (GetFolders, GetFoldersAndFiles, CreateFolder).<br> * * The servlet accepts commands sent in the following format:<br> * connector?Command=CommandName&Type=ResourceType&CurrentFolder=FolderPath<br> * <br> * It execute the command and then return the results to the client in XML * format. * */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (debug) System.out.println("--- BEGIN DOGET ---"); response.setContentType("text/xml; charset=UTF-8"); response.setHeader("Cache-Control", "no-cache"); PrintWriter out = response.getWriter(); String commandStr = request.getParameter("Command"); String typeStr = request.getParameter("Type"); String currentFolderStr = request.getParameter("CurrentFolder"); String currentPath = baseDir + typeStr + currentFolderStr; String currentDirPath = getServletContext().getRealPath(currentPath); File currentDir = new File(currentDirPath); if (!currentDir.exists()) { currentDir.mkdir(); } Document document = null; try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); document = builder.newDocument(); } catch (ParserConfigurationException pce) { pce.printStackTrace(); } Node root = CreateCommonXml(document, commandStr, typeStr, currentFolderStr, request.getContextPath() + currentPath); if (debug) System.out.println("Command = " + commandStr); if (commandStr.equals("GetFolders")) { getFolders(currentDir, root, document); } else if (commandStr.equals("GetFoldersAndFiles")) { getFolders(currentDir, root, document); getFiles(currentDir, root, document); } else if (commandStr.equals("CreateFolder")) { String newFolderStr = request.getParameter("NewFolderName"); File newFolder = new File(currentDir, newFolderStr); String retValue = "110"; if (newFolder.exists()) { retValue = "101"; } else { try { boolean dirCreated = newFolder.mkdir(); if (dirCreated) retValue = "0"; else retValue = "102"; } catch (SecurityException sex) { retValue = "103"; } } setCreateFolderResponse(retValue, root, document); } document.getDocumentElement().normalize(); try { TransformerFactory tFactory = TransformerFactory.newInstance(); Transformer transformer = tFactory.newTransformer(); DOMSource source = new DOMSource(document); StreamResult result = new StreamResult(out); transformer.transform(source, result); if (debug) { StreamResult dbgResult = new StreamResult(System.out); transformer.transform(source, dbgResult); System.out.println(""); System.out.println("--- END DOGET ---"); } } catch (Exception ex) { ex.printStackTrace(); } out.flush(); out.close(); } /** * Manage the Post requests (FileUpload).<br> * * The servlet accepts commands sent in the following format:<br> * connector?Command=FileUpload&Type=ResourceType&CurrentFolder=FolderPath<br> * <br> * It store the file (renaming it in case a file with the same name exists) * and then return an HTML file with a javascript command in it. * */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { if (debug) System.out.println("--- BEGIN DOPOST ---"); response.setContentType("text/html; charset=UTF-8"); response.setHeader("Cache-Control", "no-cache"); PrintWriter out = response.getWriter(); String commandStr = request.getParameter("Command"); String typeStr = request.getParameter("Type"); String currentFolderStr = request.getParameter("CurrentFolder"); String currentPath = baseDir + typeStr + currentFolderStr; String currentDirPath = getServletContext().getRealPath(currentPath); if (debug) System.out.println(currentDirPath); String retVal = "0"; String newName = ""; if (!commandStr.equals("FileUpload")) retVal = "203"; else { DiskFileUpload upload = new DiskFileUpload(); try { List items = upload.parseRequest(request); Map fields = new HashMap(); Iterator iter = items.iterator(); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) fields.put(item.getFieldName(), item.getString()); else fields.put(item.getFieldName(), item); } FileItem uplFile = (FileItem) fields.get("NewFile"); String fileNameLong = uplFile.getName(); fileNameLong = fileNameLong.replace('\\', '/'); String[] pathParts = fileNameLong.split("/"); String fileName = pathParts[pathParts.length - 1]; String nameWithoutExt = getNameWithoutExtension(fileName); String ext = getExtension(fileName); File pathToSave = new File(currentDirPath, fileName); int counter = 1; while (pathToSave.exists()) { newName = nameWithoutExt + "(" + counter + ")" + "." + ext; retVal = "201"; pathToSave = new File(currentDirPath, newName); counter++; } uplFile.write(pathToSave); } catch (Exception ex) { retVal = "203"; } } out.println("<script type=\"text/javascript\">"); out.println("window.parent.frames['frmUpload'].OnUploadCompleted(" + retVal + ",'" + newName + "');"); out.println("</script>"); out.flush(); out.close(); if (debug) System.out.println("--- END DOPOST ---"); } private void setCreateFolderResponse(String retValue, Node root, Document doc) { Element myEl = doc.createElement("Error"); myEl.setAttribute("number", retValue); root.appendChild(myEl); } private void getFolders(File dir, Node root, Document doc) { Element folders = doc.createElement("Folders"); root.appendChild(folders); File[] fileList = dir.listFiles(); for (int i = 0; i < fileList.length; ++i) { if (fileList[i].isDirectory()) { Element myEl = doc.createElement("Folder"); myEl.setAttribute("name", fileList[i].getName()); folders.appendChild(myEl); } } } private void getFiles(File dir, Node root, Document doc) { Element files = doc.createElement("Files"); root.appendChild(files); File[] fileList = dir.listFiles(); for (int i = 0; i < fileList.length; ++i) { if (fileList[i].isFile()) { Element myEl = doc.createElement("File"); myEl.setAttribute("name", fileList[i].getName()); myEl.setAttribute("size", "" + fileList[i].length() / 1024); files.appendChild(myEl); } } } private Node CreateCommonXml(Document doc, String commandStr, String typeStr, String currentPath, String currentUrl) { Element root = doc.createElement("Connector"); doc.appendChild(root); root.setAttribute("command", commandStr); root.setAttribute("resourceType", typeStr); Element myEl = doc.createElement("CurrentFolder"); myEl.setAttribute("path", currentPath); myEl.setAttribute("url", currentUrl); root.appendChild(myEl); return root; } /* * This method was fixed after Kris Barnhoorn (kurioskronic) submitted SF * bug #991489 */ private static String getNameWithoutExtension(String fileName) { return fileName.substring(0, fileName.lastIndexOf(".")); } /* * This method was fixed after Kris Barnhoorn (kurioskronic) submitted SF * bug #991489 */ private String getExtension(String fileName) { return fileName.substring(fileName.lastIndexOf(".") + 1); } }