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Merge pull request #6917 from jmue/fixStaleFileContents

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DocumentsStorageProvider: prevent opening stale file contents
This commit is contained in:
Tobias Kaminsky 2020-09-30 11:35:51 +02:00 committed by GitHub
commit d782da2fe9
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2 changed files with 65 additions and 31 deletions
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32
src/androidTest/java/com/owncloud/android/providers/DocumentsStorageProviderIT.kt
View file

@ -6,6 +6,7 @@ import androidx.documentfile.provider.DocumentFile
import com.owncloud.android.AbstractOnServerIT
import com.owncloud.android.R
import com.owncloud.android.datamodel.OCFile.ROOT_PATH
import com.owncloud.android.lib.common.network.WebdavUtils
import com.owncloud.android.providers.DocumentsProviderUtils.assertExistsOnServer
import com.owncloud.android.providers.DocumentsProviderUtils.assertListFilesEquals
import com.owncloud.android.providers.DocumentsProviderUtils.assertReadEquals
@ -18,6 +19,9 @@ import com.owncloud.android.providers.DocumentsProviderUtils.listFilesBlocking
import com.owncloud.android.providers.DocumentsStorageProvider.DOCUMENTID_SEPARATOR
import kotlinx.coroutines.runBlocking
import net.bytebuddy.utility.RandomString
import org.apache.commons.httpclient.HttpStatus
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity
import org.apache.commons.httpclient.methods.PutMethod
import org.junit.After
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
@ -172,4 +176,32 @@ class DocumentsStorageProviderIT : AbstractOnServerIT() {
assertFalse(file1.exists())
assertExistsOnServer(client, ocFile1.remotePath, false)
}
@Test
fun testServerChangedFileContent() {
// create random file
val file1 = rootDir.createFile("text/plain", RandomString.make())!!
file1.assertRegularFile(size = 0L)
val content1 = "initial content".toByteArray()
// write content bytes to file
contentResolver.openOutputStream(file1.uri, "wt").use {
it!!.write(content1)
}
val remotePath = file1.getOCFile(storageManager)!!.remotePath
val content2 = "new content".toByteArray()
// modify content on server side
val putMethod = PutMethod(client.webdavUri.toString() + WebdavUtils.encodePath(remotePath))
putMethod.setRequestEntity(ByteArrayRequestEntity(content2))
assertEquals(HttpStatus.SC_NO_CONTENT, client.executeMethod(putMethod))
client.exhaustResponse(putMethod.responseBodyAsStream)
putMethod.releaseConnection() // let the connection available for other methods
// read back content bytes
assertReadEquals(content2, contentResolver.openInputStream(file1.uri))
}
}

48
src/main/java/com/owncloud/android/providers/DocumentsStorageProvider.java
View file

@ -44,7 +44,6 @@ import android.provider.DocumentsProvider;
import android.util.Log;
import android.util.SparseArray;
import com.nextcloud.client.account.User;
import com.nextcloud.client.account.UserAccountManager;
import com.nextcloud.client.account.UserAccountManagerImpl;
import com.nextcloud.client.files.downloader.DownloadTask;
@ -64,6 +63,7 @@ import com.owncloud.android.lib.common.OwnCloudClientManagerFactory;
import com.owncloud.android.lib.common.accounts.AccountUtils.AccountNotFoundException;
import com.owncloud.android.lib.common.operations.RemoteOperationResult;
import com.owncloud.android.lib.common.utils.Log_OC;
import com.owncloud.android.lib.resources.files.CheckEtagRemoteOperation;
import com.owncloud.android.lib.resources.files.UploadFileRemoteOperation;
import com.owncloud.android.operations.CopyFileOperation;
import com.owncloud.android.operations.CreateFolderOperation;
@ -72,7 +72,6 @@ import com.owncloud.android.operations.MoveFileOperation;
import com.owncloud.android.operations.RefreshFolderOperation;
import com.owncloud.android.operations.RemoveFileOperation;
import com.owncloud.android.operations.RenameFileOperation;
import com.owncloud.android.operations.SynchronizeFileOperation;
import com.owncloud.android.ui.activity.SettingsActivity;
import com.owncloud.android.utils.FileStorageUtils;
import com.owncloud.android.utils.MimeTypeUtil;
@ -197,26 +196,12 @@ public class DocumentsStorageProvider extends DocumentsProvider {
OCFile ocFile = document.getFile();
Account account = document.getAccount();
final User user = accountManager.getUser(account.name).orElseThrow(RuntimeException::new); // should exist
if (ocFile.isDown()) {
RemoteOperationResult result;
try {
result = new SynchronizeFileOperation(ocFile, null, user, true, context)
.execute(document.getClient(), document.getStorageManager());
} catch (Exception e) {
throw getFileNotFoundExceptionWithCause("Error synchronizing file: " + ocFile.getFileName(), e);
}
if (result.getCode() == RemoteOperationResult.ResultCode.SYNC_CONFLICT) {
boolean needsDownload = !ocFile.isDown() || hasServerChange(document);
if (needsDownload) {
if (ocFile.getLocalModificationTimestamp() > ocFile.getLastSyncDateForData()) {
// TODO show a conflict notification with a pending intent that shows a ConflictResolveDialog
Log_OC.w(TAG, "Conflict found: " + result);
} else if (!result.isSuccess()) {
Log_OC.e(TAG, result.toString());
throw new FileNotFoundException("Error synchronizing file: " + ocFile.getFileName());
}
// TODO test if this needed here
// block thread until file is saved
FileStorageUtils.checkIfFileFinishedSaving(ocFile);
Log_OC.w(TAG, "Conflict found!");
} else {
DownloadFileOperation downloadFileOperation = new DownloadFileOperation(account, ocFile, context);
RemoteOperationResult result = downloadFileOperation.execute(document.getClient());
@ -226,12 +211,12 @@ public class DocumentsStorageProvider extends DocumentsProvider {
}
saveDownloadedFile(document.getStorageManager(), downloadFileOperation, ocFile);
}
}
File file = new File(ocFile.getStoragePath());
int accessMode = ParcelFileDescriptor.parseMode(mode);
boolean isWrite = accessMode != ParcelFileDescriptor.MODE_READ_ONLY;
if (isWrite) {
int accessMode = ParcelFileDescriptor.parseMode(mode);
if (accessMode != ParcelFileDescriptor.MODE_READ_ONLY) {
// The calling thread is not guaranteed to have a Looper, so we can't block it with the OnCloseListener.
// Thus, we are unable to do a synchronous upload and have to start an asynchronous one.
Handler handler = new Handler(context.getMainLooper());
@ -264,6 +249,23 @@ public class DocumentsStorageProvider extends DocumentsProvider {
}
}
private boolean hasServerChange(Document document) throws FileNotFoundException {
Context context = getNonNullContext();
OCFile ocFile = document.getFile();
RemoteOperationResult result = new CheckEtagRemoteOperation(ocFile.getRemotePath(), ocFile.getEtag())
.execute(document.getAccount(), context);
switch (result.getCode()) {
case ETAG_CHANGED:
return true;
case ETAG_UNCHANGED:
return false;
case FILE_NOT_FOUND:
default:
Log_OC.e(TAG, result.toString());
throw new FileNotFoundException("Error synchronizing file: " + ocFile.getFileName());
}
}
/**
* Updates the OC File after a successful download.
*