src/eu/alefzero/webdav/WebdavUtils.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 3 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package eu.alefzero.webdav;
  20
  21 import java.io.IOException;
  22 import java.io.InputStream;
  23 import java.text.ParseException;
  24 import java.text.SimpleDateFormat;
  25 import java.util.Date;
  26 import java.util.LinkedList;
  27 import java.util.List;
  28 import java.util.Locale;
  29
  30 import javax.xml.parsers.DocumentBuilder;
  31 import javax.xml.parsers.DocumentBuilderFactory;
  32 import javax.xml.parsers.ParserConfigurationException;
  33
  34 import org.w3c.dom.Document;
  35 import org.w3c.dom.Element;
  36 import org.w3c.dom.Node;
  37 import org.w3c.dom.NodeList;
  38 import org.xml.sax.SAXException;
  39
  40 import eu.alefzero.webdav.TreeNode.NodeProperty;
  41
  42 import android.util.Log;
  43
  44 public class WebdavUtils {
  45
  46   public static final String RESPONSE = "response";
  47   public static final String HREF = "href";
  48   public static final String IS_HIDDEN = "ishidden";
  49   public static final String RESOURCE_TYPE = "resourcetype";
  50   public static final String CONTENT_TYPE = "getcontenttype";
  51   public static final String CONTENT_LENGTH = "getcontentlength";
  52   public static final String LAST_MODIFIED = "getlastmodified";
  53   public static final String LAST_ACCESS = "lastaccessed";
  54   public static final String CREATE_DATE = "creationdate";
  55
  56   public static final String PROPSTAT = "propstat";
  57   public static final String STATUS = "status";
  58   public static final String PROP = "prop";
  59
  60   private static final String DAV_NAMESPACE_PREFIX = "DAV:";
  61
  62   public static final SimpleDateFormat DISPLAY_DATE_FORMAT = new SimpleDateFormat("dd.MM.yyyy hh:mm");
  63   private static final SimpleDateFormat DATETIME_FORMATS[] = {
  64       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US),
  65       new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
  66       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sss'Z'", Locale.US),
  67       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US),
  68       new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US),
  69       new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US),
  70       new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US)};
  71
  72   public static String prepareXmlForPropFind() {
  73     String ret = "<?xml version=\"1.0\" ?><D:propfind xmlns:D=\"DAV:\"><D:allprop/></D:propfind>";
  74     return ret;
  75   }
  76
  77   public static String prepareXmlForPatch() {
  78     return "<?xml version=\"1.0\" ?><D:propertyupdate xmlns:D=\"DAV:\"></D:propertyupdate>";
  79   }
  80
  81   private static Date parseResponseDate(String date) {
  82     Date returnDate = null;
  83     for (int i = 0; i < DATETIME_FORMATS.length; ++i) {
  84       try {
  85         returnDate = DATETIME_FORMATS[i].parse(date);
  86         return returnDate;
  87       } catch (ParseException e) {}
  88     }
  89     return null;
  90   }
  91
  92   private static String determineDAVPrefix(Element e) {
  93     for (int i = 0; i < e.getAttributes().getLength(); ++i) {
  94       String attrName = e.getAttributes().item(i).getNodeName();
  95       if (e.getAttribute(attrName).equals(DAV_NAMESPACE_PREFIX)) {
  96         return attrName.substring(attrName.lastIndexOf(':')+1) + ":";
  97       }
  98     }
  99     return null;
 100   }
 101
 102   public static List<TreeNode> parseResponseToNodes(InputStream response) {
 103     LinkedList<TreeNode> rList = new LinkedList<TreeNode>();
 104     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 105     DocumentBuilder builder;
 106     try {
 107       builder = factory.newDocumentBuilder();
 108       Document document = builder.parse(response);
 109       String davPrefix = determineDAVPrefix(document.getDocumentElement());
 110
 111       NodeList nodes = document.getElementsByTagName(davPrefix + RESPONSE);
 112       Log.i("WebdavUtils", "Parsing " + nodes.getLength() + " response nodes");
 113
 114       for (int i = 0; i < nodes.getLength(); ++i) {
 115         Node currentNode = nodes.item(i);
 116         TreeNode resultNode =  new TreeNode();
 117         parseResourceType(currentNode, resultNode, davPrefix);
 118         parseResourceDates(currentNode, resultNode, davPrefix);
 119         parseDisplayName(currentNode, resultNode, davPrefix);
 120         rList.add(resultNode);
 121       }
 122
 123
 124     } catch (ParserConfigurationException e) {
 125       e.printStackTrace();
 126     } catch (SAXException e) {
 127       e.printStackTrace();
 128     } catch (IOException e) {
 129       e.printStackTrace();
 130     }
 131     return rList;
 132   }
 133
 134   private static void parseDisplayName(Node currentNode, TreeNode resultNode,
 135       String davPrefix) {
 136     Element currentElement = (Element) currentNode;
 137     if (currentElement.getElementsByTagName(davPrefix + HREF).getLength() != 0) {
 138       String filepath = currentElement.getElementsByTagName(davPrefix + HREF).item(0).getFirstChild().getNodeValue();
 139       resultNode.setProperty(NodeProperty.NAME, filepath);
 140     }
 141   }
 142
 143   private static void parseResourceDates(Node currentNode, TreeNode resultNode, String davPrefix) {
 144     Element currentElement = (Element)currentNode;
 145     if (currentElement.getElementsByTagName(davPrefix + LAST_MODIFIED).getLength() != 0) {
 146       Date date = parseResponseDate(
 147           currentElement.getElementsByTagName(davPrefix + LAST_MODIFIED).item(0).getFirstChild().getNodeValue());
 148       resultNode.setProperty(NodeProperty.LAST_MODIFIED_DATE, String.valueOf(date.getTime()));
 149     }
 150     if (currentElement.getElementsByTagName(davPrefix + CREATE_DATE).getLength() != 0) {
 151       Date date = parseResponseDate(
 152           currentElement.getElementsByTagName(davPrefix + CREATE_DATE).item(0).getFirstChild().getNodeValue());
 153       resultNode.setProperty(NodeProperty.CREATE_DATE, String.valueOf(date));
 154     }
 155   }
 156
 157   private static void parseResourceType(Node currentNode, TreeNode resultNode, String davPrefix) {
 158     Element currentElement = (Element)currentNode;
 159     if (currentElement.getElementsByTagName(davPrefix + RESOURCE_TYPE).getLength() != 0 &&
 160         currentElement.getElementsByTagName(davPrefix + RESOURCE_TYPE).item(0).hasChildNodes()) {
 161       resultNode.setProperty(NodeProperty.RESOURCE_TYPE, "DIR");
 162     } else {
 163       if (currentElement.getElementsByTagName(davPrefix + CONTENT_TYPE).getLength() != 0) {
 164         resultNode.setProperty(NodeProperty.RESOURCE_TYPE,
 165             currentElement.getElementsByTagName(davPrefix + CONTENT_TYPE).item(0).getFirstChild().getNodeValue());
 166       }
 167       if (currentElement.getElementsByTagName(davPrefix + CONTENT_LENGTH).getLength() != 0) {
 168         resultNode.setProperty(NodeProperty.CONTENT_LENGTH,
 169             currentElement.getElementsByTagName(davPrefix + CONTENT_LENGTH).item(0).getFirstChild().getNodeValue());
 170       }
 171     }
 172   }
 173 }