/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.servlets.webdav;
import com.caucho.server.webapp.WebApp;
import com.caucho.util.CharBuffer;
import com.caucho.vfs.Path;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
/**
* Represents a virtual filesystem using xml files to store the attribute.
*/
public class XmlApplicationPath extends ApplicationPath {
private Path _root;
private HashMap _map = new HashMap();
public XmlApplicationPath()
{
}
/**
* path the root path.
*/
public void setRoot(Path path)
{
_root = path;
}
/**
* Returns the root path.
*/
public Path getRoot()
{
return _root;
}
/**
* Deletes the file
*
* @param path the requested relative path
*
* @return true if the remove succeeded.
*/
public boolean remove(String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
removeAttributes(path);
return super.remove(path, request, app);
}
/**
* Returns an iterator over the attribute names.
* Each attribute name is of the type AttributeName.
*
* @param path the requested relative path
* @param request the servlet request
* @param app the servlet context
*/
public Iterator getAttributeNames(String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
FileAttributes attrs = getAttributes(path);
if (attrs != null)
return attrs.getAttributeNames();
else
return null;
}
/**
* Returns an attribute value.
*
* @param name the attribute name
* @param path the requested relative path
* @param request the servlet request
* @param app the servlet context
*/
public String getAttribute(AttributeName name,
String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
FileAttributes attrs = getAttributes(path);
if (attrs != null)
return attrs.getAttribute(name);
else
return null;
}
/**
* Sets an attribute value.
*
* @param name the attribute name
* @param value the attribute value
* @param path the requested relative path
* @param request the servlet request
* @param app the servlet context
*
* @return true if the setting was successful
*/
public boolean setAttribute(AttributeName name, String value,
String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
FileAttributes attrs = getAttributes(path);
if (attrs != null)
return attrs.setAttribute(name, value);
else
return false;
}
/**
* Removes an attribute value.
*
* @param name the attribute name
* @param path the requested relative path
* @param request the servlet request
* @param app the servlet context
*/
public boolean removeAttribute(AttributeName name,
String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
FileAttributes attrs = getAttributes(path);
if (attrs != null)
attrs.removeAttribute(name);
return true;
}
protected FileAttributes getAttributes(String path)
{
FileAttributes attrs = (FileAttributes) _map.get(path);
if (attrs == null) {
attrs = new FileAttributes();
_map.put(path, attrs);
}
return attrs;
}
protected void removeAttributes(String path)
{
_map.remove(path);
}
/**
* Returns a list of the files in the directory.
*
* @param path the requested relative path
*/
public String []list(String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
ArrayList filteredList = new ArrayList();
String []names = getPath(path, request, app).list();
for (int i = 0; i < names.length; i++) {
if (! names[i].startsWith("."))
filteredList.add(names[i]);
}
return (String []) filteredList.toArray(new String[filteredList.size()]);
}
/**
* Returns the underlying path.
*/
protected Path getPath(String path,
HttpServletRequest request,
ServletContext app)
throws IOException
{
Path appDir = ((WebApp) app).getRootDirectory();
if (_root != null)
appDir = _root;
Path filePath = appDir.lookup("./" + path);
String tail = filePath.getTail();
if (tail.startsWith("."))
return filePath.getParent().lookup(".bogus");
else
return filePath;
}
public static class FileAttributes {
HashMap attributes = new HashMap();
/**
* Returns an iterator over the attribute names.
* Each attribute name is of the type AttributeName.
*/
public Iterator getAttributeNames()
throws IOException
{
return attributes.keySet().iterator();
}
/**
* Returns an attribute value.
*/
public String getAttribute(AttributeName name)
throws IOException
{
return (String) attributes.get(name);
}
/**
* Sets an attribute value.
*
* @param name the attribute name
* @param value the attribute value
*
* @return true if the setting was successful
*/
public boolean setAttribute(AttributeName name, String value)
{
attributes.put(name, value);
return true;
}
/**
* Removes an attribute value.
*
* @param name the attribute name
*/
public void removeAttribute(AttributeName name)
throws IOException
{
attributes.remove(name);
}
}
static class AttributeHandler extends org.xml.sax.helpers.DefaultHandler {
HashMap fileMap = new HashMap();
AttributeName attributeName;
String fileName;
CharBuffer value;
boolean inHref;
FileAttributes fileAttributes;
HashMap getFileMap()
{
return fileMap;
}
public void startElement(String uri, String localName,
String qName, Attributes attributes)
{
if (localName.equals("file")) {
fileName = null;
fileAttributes = new FileAttributes();
}
else if (localName.equals("href")) {
inHref = true;
value = CharBuffer.allocate();
}
else if (attributeName == null) {
attributeName = new AttributeName(uri, localName, qName);
value = CharBuffer.allocate();
}
}
public void characters(char []buffer, int offset, int length)
{
if (value != null)
value.append(buffer, offset, length);
}
public void endElement (String uri, String localName, String qName)
throws SAXException
{
if (localName.equals("file")) {
if (fileName != null)
fileMap.put(fileName, fileAttributes);
fileName = null;
fileAttributes = null;
}
else if (localName.equals("href")) {
fileName = value.close();
value = null;
}
else if (attributeName == null) {
}
else if (localName.equals(attributeName.getLocal()) &&
uri.equals(attributeName.getNamespace())) {
fileAttributes.setAttribute(attributeName, value.close());
value = null;
attributeName = null;
}
}
}
}