+/* ownCloud Android client application
+ * Copyright (C) 2012 ownCloud Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package com.owncloud.android.oc_framework.operations.remote;
+
+import org.apache.commons.httpclient.HttpStatus;
+import org.apache.commons.httpclient.methods.HeadMethod;
+
+import com.owncloud.android.oc_framework.network.webdav.WebdavClient;
+import com.owncloud.android.oc_framework.operations.RemoteOperation;
+import com.owncloud.android.oc_framework.operations.RemoteOperationResult;
+import com.owncloud.android.oc_framework.network.webdav.WebdavUtils;
+
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.util.Log;
+
+/**
+ * Operation to check the existence or absence of a path in a remote server.
+ *
+ * @author David A. Velasco
+ */
+public class ExistenceCheckRemoteOperation extends RemoteOperation {
+
+ /** Maximum time to wait for a response from the server in MILLISECONDs. */
+ public static final int TIMEOUT = 10000;
+
+ private static final String TAG = ExistenceCheckRemoteOperation.class.getSimpleName();
+
+ private String mPath;
+ private Context mContext;
+ private boolean mSuccessIfAbsent;
+
+
+ /**
+ * Full constructor. Success of the operation will depend upon the value of successIfAbsent.
+ *
+ * @param path Path to append to the URL owned by the client instance.
+ * @param context Android application context.
+ * @param successIfAbsent When 'true', the operation finishes in success if the path does NOT exist in the remote server (HTTP 404).
+ */
+ public ExistenceCheckRemoteOperation(String path, Context context, boolean successIfAbsent) {
+ mPath = (path != null) ? path : "";
+ mContext = context;
+ mSuccessIfAbsent = successIfAbsent;
+ }
+
+
+ @Override
+ protected RemoteOperationResult run(WebdavClient client) {
+ if (!isOnline()) {
+ return new RemoteOperationResult(RemoteOperationResult.ResultCode.NO_NETWORK_CONNECTION);
+ }
+ RemoteOperationResult result = null;
+ HeadMethod head = null;
+ try {
+ head = new HeadMethod(client.getBaseUri() + WebdavUtils.encodePath(mPath));
+ int status = client.executeMethod(head, TIMEOUT, TIMEOUT);
+ client.exhaustResponse(head.getResponseBodyAsStream());
+ boolean success = (status == HttpStatus.SC_OK && !mSuccessIfAbsent) || (status == HttpStatus.SC_NOT_FOUND && mSuccessIfAbsent);
+ result = new RemoteOperationResult(success, status, head.getResponseHeaders());
+ Log.d(TAG, "Existence check for " + client.getBaseUri() + WebdavUtils.encodePath(mPath) + " targeting for " + (mSuccessIfAbsent ? " absence " : " existence ") + "finished with HTTP status " + status + (!success?"(FAIL)":""));
+
+ } catch (Exception e) {
+ result = new RemoteOperationResult(e);
+ Log.e(TAG, "Existence check for " + client.getBaseUri() + WebdavUtils.encodePath(mPath) + " targeting for " + (mSuccessIfAbsent ? " absence " : " existence ") + ": " + result.getLogMessage(), result.getException());
+
+ } finally {
+ if (head != null)
+ head.releaseConnection();
+ }
+ return result;
+ }
+
+ private boolean isOnline() {
+ ConnectivityManager cm = (ConnectivityManager) mContext
+ .getSystemService(Context.CONNECTIVITY_SERVICE);
+ return cm != null && cm.getActiveNetworkInfo() != null
+ && cm.getActiveNetworkInfo().isConnectedOrConnecting();
+ }
+
+
+}
projects / pub / Android / ownCloud.git / commitdiff