Java tutorial
/* ownCloud Android Library is available under MIT license * Copyright (C) 2015 ownCloud Inc. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * */ package com.cerema.cloud2.lib.resources.status; import java.util.ArrayList; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.commons.httpclient.params.HttpParams; import org.json.JSONException; import org.json.JSONObject; import android.content.Context; import android.net.ConnectivityManager; import android.net.Uri; import com.cerema.cloud2.lib.common.OwnCloudClient; import com.cerema.cloud2.lib.common.OwnCloudClientManagerFactory; import com.cerema.cloud2.lib.common.accounts.AccountUtils; import com.cerema.cloud2.lib.common.operations.RemoteOperation; import com.cerema.cloud2.lib.common.operations.RemoteOperationResult; import com.cerema.cloud2.lib.common.utils.Log_OC; /** * Checks if the server is valid and if the server supports the Share API * * @author David A. Velasco * @author masensio * */ public class GetRemoteStatusOperation extends RemoteOperation { /** * Maximum time to wait for a response from the server when the connection is being tested, * in MILLISECONDs. */ public static final int TRY_CONNECTION_TIMEOUT = 5000; private static final String TAG = GetRemoteStatusOperation.class.getSimpleName(); private static final String NODE_INSTALLED = "installed"; private static final String NODE_VERSION = "version"; private RemoteOperationResult mLatestResult; private Context mContext; public GetRemoteStatusOperation(Context context) { mContext = context; } private boolean tryConnection(OwnCloudClient client) { boolean retval = false; GetMethod get = null; String baseUrlSt = client.getBaseUri().toString(); try { get = new GetMethod(baseUrlSt + AccountUtils.STATUS_PATH); HttpParams params = get.getParams().getDefaultParams(); params.setParameter(HttpMethodParams.USER_AGENT, OwnCloudClientManagerFactory.getUserAgent()); get.getParams().setDefaults(params); client.setFollowRedirects(false); boolean isRedirectToNonSecureConnection = false; int status = client.executeMethod(get, TRY_CONNECTION_TIMEOUT, TRY_CONNECTION_TIMEOUT); mLatestResult = new RemoteOperationResult((status == HttpStatus.SC_OK), status, get.getResponseHeaders()); String redirectedLocation = mLatestResult.getRedirectedLocation(); while (redirectedLocation != null && redirectedLocation.length() > 0 && !mLatestResult.isSuccess()) { isRedirectToNonSecureConnection |= (baseUrlSt.startsWith("https://") && redirectedLocation.startsWith("http://")); get.releaseConnection(); get = new GetMethod(redirectedLocation); status = client.executeMethod(get, TRY_CONNECTION_TIMEOUT, TRY_CONNECTION_TIMEOUT); mLatestResult = new RemoteOperationResult((status == HttpStatus.SC_OK), status, get.getResponseHeaders()); redirectedLocation = mLatestResult.getRedirectedLocation(); } String response = get.getResponseBodyAsString(); if (status == HttpStatus.SC_OK) { JSONObject json = new JSONObject(response); if (!json.getBoolean(NODE_INSTALLED)) { mLatestResult = new RemoteOperationResult( RemoteOperationResult.ResultCode.INSTANCE_NOT_CONFIGURED); } else { String version = json.getString(NODE_VERSION); OwnCloudVersion ocVersion = new OwnCloudVersion(version); if (!ocVersion.isVersionValid()) { mLatestResult = new RemoteOperationResult(RemoteOperationResult.ResultCode.BAD_OC_VERSION); } else { // success if (isRedirectToNonSecureConnection) { mLatestResult = new RemoteOperationResult( RemoteOperationResult.ResultCode.OK_REDIRECT_TO_NON_SECURE_CONNECTION); } else { mLatestResult = new RemoteOperationResult( baseUrlSt.startsWith("https://") ? RemoteOperationResult.ResultCode.OK_SSL : RemoteOperationResult.ResultCode.OK_NO_SSL); } ArrayList<Object> data = new ArrayList<Object>(); data.add(ocVersion); mLatestResult.setData(data); retval = true; } } } else { mLatestResult = new RemoteOperationResult(false, status, get.getResponseHeaders()); } } catch (JSONException e) { mLatestResult = new RemoteOperationResult(RemoteOperationResult.ResultCode.INSTANCE_NOT_CONFIGURED); } catch (Exception e) { mLatestResult = new RemoteOperationResult(e); } finally { if (get != null) get.releaseConnection(); } if (mLatestResult.isSuccess()) { Log_OC.i(TAG, "Connection check at " + baseUrlSt + ": " + mLatestResult.getLogMessage()); } else if (mLatestResult.getException() != null) { Log_OC.e(TAG, "Connection check at " + baseUrlSt + ": " + mLatestResult.getLogMessage(), mLatestResult.getException()); } else { Log_OC.e(TAG, "Connection check at " + baseUrlSt + ": " + mLatestResult.getLogMessage()); } return retval; } private boolean isOnline() { ConnectivityManager cm = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE); return cm != null && cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnectedOrConnecting(); } @Override protected RemoteOperationResult run(OwnCloudClient client) { if (!isOnline()) { return new RemoteOperationResult(RemoteOperationResult.ResultCode.NO_NETWORK_CONNECTION); } String baseUriStr = client.getBaseUri().toString(); if (baseUriStr.startsWith("http://") || baseUriStr.startsWith("https://")) { tryConnection(client); } else { client.setBaseUri(Uri.parse("https://" + baseUriStr)); boolean httpsSuccess = tryConnection(client); if (!httpsSuccess && !mLatestResult.isSslRecoverableException()) { Log_OC.d(TAG, "establishing secure connection failed, trying non secure connection"); client.setBaseUri(Uri.parse("http://" + baseUriStr)); tryConnection(client); } } return mLatestResult; } }