src/com/owncloud/android/operations/SynchronizeFileOperation.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   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 com.owncloud.android.operations;
  20
  21 import org.apache.http.HttpStatus;
  22 import org.apache.jackrabbit.webdav.DavConstants;
  23 import org.apache.jackrabbit.webdav.MultiStatus;
  24 import org.apache.jackrabbit.webdav.client.methods.PropFindMethod;
  25
  26 import com.owncloud.android.Log_OC;
  27 import com.owncloud.android.datamodel.DataStorageManager;
  28 import com.owncloud.android.datamodel.OCFile;
  29 import com.owncloud.android.files.services.FileDownloader;
  30 import com.owncloud.android.files.services.FileUploader;
  31 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  32
  33 import android.accounts.Account;
  34 import android.content.Context;
  35 import android.content.Intent;
  36
  37
  38 import eu.alefzero.webdav.WebdavClient;
  39 import eu.alefzero.webdav.WebdavEntry;
  40 import eu.alefzero.webdav.WebdavUtils;
  41
  42 public class SynchronizeFileOperation extends RemoteOperation {
  43
  44     private String TAG = SynchronizeFileOperation.class.getSimpleName();
  45     private static final int SYNC_READ_TIMEOUT = 10000;
  46     private static final int SYNC_CONNECTION_TIMEOUT = 5000;
  47
  48     private OCFile mLocalFile;
  49     private OCFile mServerFile;
  50     private DataStorageManager mStorageManager;
  51     private Account mAccount;
  52     private boolean mSyncFileContents;
  53     private boolean mLocalChangeAlreadyKnown;
  54     private Context mContext;
  55
  56     private boolean mTransferWasRequested = false;
  57
  58     public SynchronizeFileOperation(
  59             OCFile localFile,
  60             OCFile serverFile,          // make this null to let the operation checks the server; added to reuse info from SynchronizeFolderOperation
  61             DataStorageManager storageManager,
  62             Account account,
  63             boolean syncFileContents,
  64             boolean localChangeAlreadyKnown,
  65             Context context) {
  66
  67         mLocalFile = localFile;
  68         mServerFile = serverFile;
  69         mStorageManager = storageManager;
  70         mAccount = account;
  71         mSyncFileContents = syncFileContents;
  72         mLocalChangeAlreadyKnown = localChangeAlreadyKnown;
  73         mContext = context;
  74     }
  75
  76
  77     @Override
  78     protected RemoteOperationResult run(WebdavClient client) {
  79
  80         PropFindMethod propfind = null;
  81         RemoteOperationResult result = null;
  82         mTransferWasRequested = false;
  83         try {
  84             if (!mLocalFile.isDown()) {
  85                 /// easy decision
  86                 requestForDownload(mLocalFile);
  87                 result = new RemoteOperationResult(ResultCode.OK);
  88
  89             } else {
  90                 /// local copy in the device -> need to think a bit more before do anything
  91
  92                 if (mServerFile == null) {
  93                     /// take the duty of check the server for the current state of the file there
  94                     propfind = new PropFindMethod(client.getBaseUri() + WebdavUtils.encodePath(mLocalFile.getRemotePath()),
  95                             DavConstants.PROPFIND_ALL_PROP,
  96                             DavConstants.DEPTH_0);
  97                     int status = client.executeMethod(propfind, SYNC_READ_TIMEOUT, SYNC_CONNECTION_TIMEOUT);
  98                     boolean isMultiStatus = status == HttpStatus.SC_MULTI_STATUS;
  99                     if (isMultiStatus) {
 100                         MultiStatus resp = propfind.getResponseBodyAsMultiStatus();
 101                         WebdavEntry we = new WebdavEntry(resp.getResponses()[0],
 102                                                client.getBaseUri().getPath());
 103                         mServerFile = fillOCFile(we);
 104                         mServerFile.setLastSyncDateForProperties(System.currentTimeMillis());
 105
 106                     } else {
 107                         client.exhaustResponse(propfind.getResponseBodyAsStream());
 108                         result = new RemoteOperationResult(false, status, propfind.getResponseHeaders());
 109                     }
 110                 }
 111
 112                 if (result == null) {   // true if the server was not checked. nothing was wrong with the remote request
 113
 114                     /// check changes in server and local file
 115                     boolean serverChanged = false;
 116                     if (mServerFile.getEtag() != null) {
 117                         serverChanged = (!mServerFile.getEtag().equals(mLocalFile.getEtag()));   // TODO could this be dangerous when the user upgrades the server from non-tagged to tagged?
 118                     } else {
 119                         // server without etags
 120                         serverChanged = (mServerFile.getModificationTimestamp() > mLocalFile.getModificationTimestampAtLastSyncForData());
 121                     }
 122                     boolean localChanged = (mLocalChangeAlreadyKnown || mLocalFile.getLocalModificationTimestamp() > mLocalFile.getLastSyncDateForData());
 123                         // TODO this will be always true after the app is upgraded to database version 2; will result in unnecessary uploads
 124
 125                     /// decide action to perform depending upon changes
 126                     if (localChanged && serverChanged) {
 127                         result = new RemoteOperationResult(ResultCode.SYNC_CONFLICT);
 128
 129                     } else if (localChanged) {
 130                         if (mSyncFileContents) {
 131                             requestForUpload(mLocalFile);
 132                             // the local update of file properties will be done by the FileUploader service when the upload finishes
 133                         } else {
 134                             // NOTHING TO DO HERE: updating the properties of the file in the server without uploading the contents would be stupid;
 135                             // So, an instance of SynchronizeFileOperation created with syncFileContents == false is completely useless when we suspect
 136                             // that an upload is necessary (for instance, in FileObserverService).
 137                         }
 138                         result = new RemoteOperationResult(ResultCode.OK);
 139
 140                     } else if (serverChanged) {
 141                         if (mSyncFileContents) {
 142                             requestForDownload(mLocalFile); // local, not server; we won't to keep the value of keepInSync!
 143                             // the update of local data will be done later by the FileUploader service when the upload finishes
 144                         } else {
 145                             // TODO CHECK: is this really useful in some point in the code?
 146                             mServerFile.setKeepInSync(mLocalFile.keepInSync());
 147                             mServerFile.setLastSyncDateForData(mLocalFile.getLastSyncDateForData());
 148                             mServerFile.setStoragePath(mLocalFile.getStoragePath());
 149                             mServerFile.setParentId(mLocalFile.getParentId());
 150                             mStorageManager.saveFile(mServerFile);
 151
 152                         }
 153                         result = new RemoteOperationResult(ResultCode.OK);
 154
 155                     } else {
 156                         // nothing changed, nothing to do
 157                         result = new RemoteOperationResult(ResultCode.OK);
 158                     }
 159
 160                 }
 161
 162             }
 163
 164             Log_OC.i(TAG, "Synchronizing " + mAccount.name + ", file " + mLocalFile.getRemotePath() + ": " + result.getLogMessage());
 165
 166         } catch (Exception e) {
 167             result = new RemoteOperationResult(e);
 168             Log_OC.e(TAG, "Synchronizing " + mAccount.name + ", file " + (mLocalFile != null ? mLocalFile.getRemotePath() : "NULL") + ": " + result.getLogMessage(), result.getException());
 169
 170         } finally {
 171             if (propfind != null)
 172                 propfind.releaseConnection();
 173         }
 174         return result;
 175     }
 176
 177
 178     /**
 179      * Requests for an upload to the FileUploader service
 180      *
 181      * @param file     OCFile object representing the file to upload
 182      */
 183     private void requestForUpload(OCFile file) {
 184         Intent i = new Intent(mContext, FileUploader.class);
 185         i.putExtra(FileUploader.KEY_ACCOUNT, mAccount);
 186         i.putExtra(FileUploader.KEY_FILE, file);
 187         /*i.putExtra(FileUploader.KEY_REMOTE_FILE, mRemotePath);    // doing this we would lose the value of keepInSync in the road, and maybe it's not updated in the database when the FileUploader service gets it!
 188         i.putExtra(FileUploader.KEY_LOCAL_FILE, localFile.getStoragePath());*/
 189         i.putExtra(FileUploader.KEY_UPLOAD_TYPE, FileUploader.UPLOAD_SINGLE_FILE);
 190         i.putExtra(FileUploader.KEY_FORCE_OVERWRITE, true);
 191         mContext.startService(i);
 192         mTransferWasRequested = true;
 193     }
 194
 195
 196     /**
 197      * Requests for a download to the FileDownloader service
 198      *
 199      * @param file     OCFile object representing the file to download
 200      */
 201     private void requestForDownload(OCFile file) {
 202         Intent i = new Intent(mContext, FileDownloader.class);
 203         i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 204         i.putExtra(FileDownloader.EXTRA_FILE, file);
 205         mContext.startService(i);
 206         mTransferWasRequested = true;
 207     }
 208
 209
 210     /**
 211      * Creates and populates a new {@link OCFile} object with the data read from the server.
 212      *
 213      * @param we        WebDAV entry read from the server for a WebDAV resource (remote file or folder).
 214      * @return          New OCFile instance representing the remote resource described by we.
 215      */
 216     private OCFile fillOCFile(WebdavEntry we) {
 217         OCFile file = new OCFile(we.decodedPath());
 218         file.setCreationTimestamp(we.createTimestamp());
 219         file.setFileLength(we.contentLength());
 220         file.setMimetype(we.contentType());
 221         file.setModificationTimestamp(we.modifiedTimestamp());
 222         return file;
 223     }
 224
 225
 226     public boolean transferWasRequested() {
 227         return mTransferWasRequested;
 228     }
 229
 230
 231     public OCFile getLocalFile() {
 232         return mLocalFile;
 233     }
 234
 235 }