Java tutorial
/* * Nextcloud Android client application * * @author Tobias Kaminsky * Copyright (C) 2017 Tobias Kaminsky * Copyright (C) 2017 Nextcloud GmbH. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * at your option) any later version. * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.owncloud.android.lib.resources.users; import com.google.gson.reflect.TypeToken; import com.owncloud.android.lib.common.OwnCloudClient; import com.owncloud.android.lib.common.operations.RemoteOperationResult; import com.owncloud.android.lib.common.utils.Log_OC; import com.owncloud.android.lib.ocs.ServerResponse; import com.owncloud.android.lib.ocs.responses.PrivateKey; import com.owncloud.android.lib.resources.OCSRemoteOperation; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.GetMethod; import java.util.ArrayList; /** * Remote operation performing the fetch of the private key for an user */ public class GetPrivateKeyOperation extends OCSRemoteOperation { private static final String TAG = GetPrivateKeyOperation.class.getSimpleName(); private static final int SYNC_READ_TIMEOUT = 40000; private static final int SYNC_CONNECTION_TIMEOUT = 5000; private static final String PUBLIC_KEY_URL = "/ocs/v2.php/apps/end_to_end_encryption/api/v1/private-key"; private static final String JSON_FORMAT = "?format=json"; /** * @param client Client object */ @Override protected RemoteOperationResult run(OwnCloudClient client) { GetMethod getMethod = null; RemoteOperationResult result; try { // remote request getMethod = new GetMethod(client.getBaseUri() + PUBLIC_KEY_URL + JSON_FORMAT); getMethod.addRequestHeader(OCS_API_HEADER, OCS_API_HEADER_VALUE); int status = client.executeMethod(getMethod, SYNC_READ_TIMEOUT, SYNC_CONNECTION_TIMEOUT); if (status == HttpStatus.SC_OK) { ServerResponse<PrivateKey> serverResponse = getServerResponse(getMethod, new TypeToken<ServerResponse<PrivateKey>>() { }); result = new RemoteOperationResult(true, getMethod); ArrayList<Object> keys = new ArrayList<>(); keys.add(serverResponse.getOcs().getData().getKey()); result.setData(keys); } else { result = new RemoteOperationResult(false, getMethod); client.exhaustResponse(getMethod.getResponseBodyAsStream()); } } catch (Exception e) { result = new RemoteOperationResult(e); Log_OC.e(TAG, "Fetching of public key failed: " + result.getLogMessage(), result.getException()); } finally { if (getMethod != null) getMethod.releaseConnection(); } return result; } }