src/eu/alefzero/webdav/FileRequestEntity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 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.File;
  22 import java.io.IOException;
  23 import java.io.OutputStream;
  24 import java.io.RandomAccessFile;
  25 import java.nio.ByteBuffer;
  26 import java.nio.channels.FileChannel;
  27 import java.nio.channels.FileLock;
  28 import java.util.Collection;
  29 import java.util.HashSet;
  30 import java.util.Iterator;
  31 import java.util.Set;
  32
  33 import org.apache.commons.httpclient.methods.RequestEntity;
  34
  35 import eu.alefzero.webdav.OnDatatransferProgressListener;
  36
  37 import android.util.Log;
  38
  39
  40 /**
  41  * A RequestEntity that represents a File.
  42  *
  43  */
  44 public class FileRequestEntity implements RequestEntity {
  45
  46     final File mFile;
  47     final String mContentType;
  48     Set<OnDatatransferProgressListener> mDataTransferListeners = new HashSet<OnDatatransferProgressListener>();
  49
  50     public FileRequestEntity(final File file, final String contentType) {
  51         super();
  52         this.mFile = file;
  53         this.mContentType = contentType;
  54         if (file == null) {
  55             throw new IllegalArgumentException("File may not be null");
  56         }
  57     }
  58
  59     @Override
  60     public long getContentLength() {
  61         return mFile.length();
  62     }
  63
  64     @Override
  65     public String getContentType() {
  66         return mContentType;
  67     }
  68
  69     @Override
  70     public boolean isRepeatable() {
  71         return true;
  72     }
  73
  74     public void addOnDatatransferProgressListener(OnDatatransferProgressListener listener) {
  75         mDataTransferListeners.add(listener);
  76     }
  77
  78     public void addOnDatatransferProgressListeners(Collection<OnDatatransferProgressListener> listeners) {
  79         mDataTransferListeners.addAll(listeners);
  80     }
  81
  82     public void removeOnDatatransferProgressListener(OnDatatransferProgressListener listener) {
  83         mDataTransferListeners.remove(listener);
  84     }
  85
  86
  87     @Override
  88     public void writeRequest(final OutputStream out) throws IOException {
  89         //byte[] tmp = new byte[4096];
  90         ByteBuffer tmp = ByteBuffer.allocate(4096);
  91         int readResult = 0;
  92
  93         // TODO(bprzybylski): each mem allocation can throw OutOfMemoryError we need to handle it
  94         //                    globally in some fashionable manner
  95         RandomAccessFile raf = new RandomAccessFile(mFile, "r");
  96         FileChannel channel = raf.getChannel();
  97         FileLock lock = channel.tryLock();
  98         Iterator<OnDatatransferProgressListener> it = null;
  99         long transferred = 0;
 100         long size = mFile.length();
 101         if (size == 0) size = -1;
 102         try {
 103             while ((readResult = channel.read(tmp)) >= 0) {
 104                 out.write(tmp.array(), 0, readResult);
 105                 tmp.clear();
 106                 transferred += readResult;
 107                 it = mDataTransferListeners.iterator();
 108                 while (it.hasNext()) {
 109                     it.next().onTransferProgress(readResult, transferred, size, mFile.getName());
 110                 }
 111             }
 112
 113         } catch (IOException io) {
 114             Log.e("FileRequestException", io.getMessage());
 115             throw new RuntimeException("Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really", io);
 116
 117         } finally {
 118             lock.release();
 119             channel.close();
 120             raf.close();
 121         }
 122     }
 123
 124 }