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.text.Html;
  43 import android.util.Log;
  44
  45 public class WebdavUtils {
  46
  47   public static final String RESPONSE = "response";
  48   public static final String HREF = "href";
  49   public static final String IS_HIDDEN = "ishidden";
  50   public static final String RESOURCE_TYPE = "resourcetype";
  51   public static final String CONTENT_TYPE = "getcontenttype";
  52   public static final String CONTENT_LENGTH = "getcontentlength";
  53   public static final String LAST_MODIFIED = "getlastmodified";
  54   public static final String LAST_ACCESS = "lastaccessed";
  55   public static final String CREATE_DATE = "creationdate";
  56
  57   public static final String PROPSTAT = "propstat";
  58   public static final String STATUS = "status";
  59   public static final String PROP = "prop";
  60
  61   private static final String DAV_NAMESPACE_PREFIX = "DAV:";
  62
  63   public static final SimpleDateFormat DISPLAY_DATE_FORMAT = new SimpleDateFormat("dd.MM.yyyy hh:mm");
  64   private static final SimpleDateFormat DATETIME_FORMATS[] = {
  65       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US),
  66       new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
  67       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sss'Z'", Locale.US),
  68       new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US),
  69       new SimpleDateFormat("EEE MMM dd HH:mm:ss zzz yyyy", Locale.US),
  70       new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US),
  71       new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US)};
  72
  73   public static String prepareXmlForPropFind() {
  74     String ret = "<?xml version=\"1.0\" ?><D:propfind xmlns:D=\"DAV:\"><D:allprop/></D:propfind>";
  75     return ret;
  76   }
  77
  78   public static String prepareXmlForPatch() {
  79     return "<?xml version=\"1.0\" ?><D:propertyupdate xmlns:D=\"DAV:\"></D:propertyupdate>";
  80   }
  81
  82   private static Date parseResponseDate(String date) {
  83     Date returnDate = null;
  84     for (int i = 0; i < DATETIME_FORMATS.length; ++i) {
  85       try {
  86         returnDate = DATETIME_FORMATS[i].parse(date);
  87         return returnDate;
  88       } catch (ParseException e) {}
  89     }
  90     return null;
  91   }
  92
  93   private static String determineDAVPrefix(Element e) {
  94     for (int i = 0; i < e.getAttributes().getLength(); ++i) {
  95       String attrName = e.getAttributes().item(i).getNodeName();
  96       if (e.getAttribute(attrName).equals(DAV_NAMESPACE_PREFIX)) {
  97         return attrName.substring(attrName.lastIndexOf(':')+1) + ":";
  98       }
  99     }
 100     return null;
 101   }
 102
 103   public static List<TreeNode> parseResponseToNodes(InputStream response) {
 104     LinkedList<TreeNode> rList = new LinkedList<TreeNode>();
 105     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 106     DocumentBuilder builder;
 107     try {
 108       builder = factory.newDocumentBuilder();
 109       Document document = builder.parse(response);
 110       String davPrefix = determineDAVPrefix(document.getDocumentElement());
 111
 112       NodeList nodes = document.getElementsByTagName(davPrefix + RESPONSE);
 113       Log.i("WebdavUtils", "Parsing " + nodes.getLength() + " response nodes");
 114
 115       for (int i = 0; i < nodes.getLength(); ++i) {
 116         Node currentNode = nodes.item(i);
 117         TreeNode resultNode =  new TreeNode();
 118         parseResourceType(currentNode, resultNode, davPrefix);
 119         parseResourceDates(currentNode, resultNode, davPrefix);
 120         parseDisplayName(currentNode, resultNode, davPrefix);
 121         rList.add(resultNode);
 122       }
 123
 124
 125     } catch (ParserConfigurationException e) {
 126       e.printStackTrace();
 127     } catch (SAXException e) {
 128       e.printStackTrace();
 129     } catch (IOException e) {
 130       e.printStackTrace();
 131     }
 132     return rList;
 133   }
 134
 135   private static void parseDisplayName(Node currentNode, TreeNode resultNode,
 136       String davPrefix) {
 137     Element currentElement = (Element) currentNode;
 138     if (currentElement.getElementsByTagName(davPrefix + HREF).getLength() != 0) {
 139       String filepath = currentElement.getElementsByTagName(davPrefix + HREF).item(0).getFirstChild().getNodeValue();
 140       resultNode.setProperty(NodeProperty.NAME, filepath);
 141     }
 142   }
 143
 144   private static void parseResourceDates(Node currentNode, TreeNode resultNode, String davPrefix) {
 145     Element currentElement = (Element)currentNode;
 146     if (currentElement.getElementsByTagName(davPrefix + LAST_MODIFIED).getLength() != 0) {
 147       Date date = parseResponseDate(
 148           currentElement.getElementsByTagName(davPrefix + LAST_MODIFIED).item(0).getFirstChild().getNodeValue());
 149       resultNode.setProperty(NodeProperty.LAST_MODIFIED_DATE, DISPLAY_DATE_FORMAT.format(date));
 150     }
 151     if (currentElement.getElementsByTagName(davPrefix + CREATE_DATE).getLength() != 0) {
 152       Date date = parseResponseDate(
 153           currentElement.getElementsByTagName(davPrefix + CREATE_DATE).item(0).getFirstChild().getNodeValue());
 154       resultNode.setProperty(NodeProperty.CREATE_DATE, DISPLAY_DATE_FORMAT.format(date));
 155     }
 156   }
 157
 158   private static void parseResourceType(Node currentNode, TreeNode resultNode, String davPrefix) {
 159     Element currentElement = (Element)currentNode;
 160     if (currentElement.getElementsByTagName(davPrefix + RESOURCE_TYPE).getLength() != 0 &&
 161         currentElement.getElementsByTagName(davPrefix + RESOURCE_TYPE).item(0).hasChildNodes()) {
 162       resultNode.setProperty(NodeProperty.RESOURCE_TYPE, "DIR");
 163     } else {
 164       if (currentElement.getElementsByTagName(davPrefix + CONTENT_TYPE).getLength() != 0) {
 165         resultNode.setProperty(NodeProperty.RESOURCE_TYPE,
 166             currentElement.getElementsByTagName(davPrefix + CONTENT_TYPE).item(0).getFirstChild().getNodeValue());
 167       }
 168       if (currentElement.getElementsByTagName(davPrefix + CONTENT_LENGTH).getLength() != 0) {
 169         resultNode.setProperty(NodeProperty.CONTENT_LENGTH,
 170             currentElement.getElementsByTagName(davPrefix + CONTENT_LENGTH).item(0).getFirstChild().getNodeValue());
 171       }
 172     }
 173   }
 174 }