src/eu/alefzero/owncloud/authenticator/ConnectionCheckerRunnable.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 3 of the License, or
   7  *   (at your option) any later version.
   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 eu.alefzero.owncloud.authenticator;
  20
  21 import java.net.ConnectException;
  22 import java.net.SocketTimeoutException;
  23 import java.net.UnknownHostException;
  24
  25 import javax.net.ssl.SSLHandshakeException;
  26
  27 import org.apache.commons.httpclient.HttpStatus;
  28 import org.apache.commons.httpclient.methods.GetMethod;
  29 import org.json.JSONException;
  30 import org.json.JSONObject;
  31
  32 import eu.alefzero.owncloud.AccountUtils;
  33 import eu.alefzero.owncloud.authenticator.OnConnectCheckListener.ResultType;
  34 import eu.alefzero.owncloud.utils.OwnCloudVersion;
  35 import eu.alefzero.webdav.WebdavClient;
  36 import android.content.Context;
  37 import android.net.ConnectivityManager;
  38 import android.net.Uri;
  39 import android.os.Handler;
  40 import android.util.Log;
  41
  42 public class ConnectionCheckerRunnable implements Runnable {
  43
  44     /** Maximum time to wait for a response from the server when the connection is being tested, in MILLISECONDs.  */
  45     public static final int TRY_CONNECTION_TIMEOUT = 5000;
  46
  47     private static final String TAG = "ConnectionCheckerRunnable";
  48     private OnConnectCheckListener mListener;
  49     private String mUrl;
  50     private Handler mHandler;
  51     private ResultType mLatestResult;
  52     private Context mContext;
  53     private OwnCloudVersion mOCVersion;
  54
  55     public void setListener(OnConnectCheckListener listener, Handler handler) {
  56         mListener = listener;
  57         mHandler = handler;
  58     }
  59
  60     public ConnectionCheckerRunnable(String url, Context context) {
  61         mListener = null;
  62         mHandler = null;
  63         mUrl = url;
  64         mContext = context;
  65         mOCVersion = null;
  66     }
  67
  68     @Override
  69     public void run() {
  70
  71         if (!isOnline()) {
  72             postResult(ResultType.NO_NETWORK_CONNECTION);
  73             return;
  74         }
  75         if (mUrl.startsWith("http://") || mUrl.startsWith("https://")) {
  76             mLatestResult = (mUrl.startsWith("https://"))? ResultType.OK_SSL : ResultType.OK_NO_SSL;
  77             tryConnection(Uri.parse(mUrl + AccountUtils.STATUS_PATH));
  78             postResult(mLatestResult);
  79         } else {
  80             Uri uri = Uri.parse("https://" + mUrl + AccountUtils.STATUS_PATH);
  81             if (tryConnection(uri)) {
  82                 postResult(ResultType.OK_SSL);
  83                 return;
  84             }
  85             Log.d(TAG,
  86                     "establishing secure connection failed, trying non secure connection");
  87             uri = Uri.parse("http://" + mUrl + AccountUtils.STATUS_PATH);
  88
  89             if (tryConnection(uri)) {
  90                 postResult(ResultType.OK_NO_SSL);
  91                 return;
  92             }
  93             postResult(mLatestResult);
  94         }
  95     }
  96
  97     public OwnCloudVersion getDiscoveredVersion() {
  98         return mOCVersion;
  99     }
 100
 101     private boolean tryConnection(Uri uri) {
 102         WebdavClient wc = new WebdavClient();
 103         wc.allowSelfsignedCertificates();
 104         GetMethod get = new GetMethod(uri.toString());
 105         boolean retval = false;
 106         try {
 107             int status = wc.executeMethod(get, TRY_CONNECTION_TIMEOUT);
 108             switch (status) {
 109             case HttpStatus.SC_OK: {
 110                 String response = get.getResponseBodyAsString();
 111                 JSONObject json = new JSONObject(response);
 112                 if (!json.getBoolean("installed")) {
 113                     mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 114                     break;
 115                 }
 116                 mOCVersion = new OwnCloudVersion(json.getString("version"));
 117                 if (!mOCVersion.isVersionValid())
 118                     break;
 119                 retval = true;
 120                 break;
 121             }
 122             case HttpStatus.SC_NOT_FOUND:
 123                 mLatestResult = ResultType.FILE_NOT_FOUND;
 124                 break;
 125             case HttpStatus.SC_INTERNAL_SERVER_ERROR:
 126                 mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 127                 break;
 128             default:
 129                 mLatestResult = ResultType.UNKNOWN_ERROR;
 130                 Log.e(TAG, "Not handled status received from server: " + status);
 131             }
 132
 133         } catch (Exception e) {
 134             if (e instanceof UnknownHostException
 135                     || e instanceof ConnectException
 136                     || e instanceof SocketTimeoutException) {
 137                 mLatestResult = ResultType.HOST_NOT_AVAILABLE;
 138             } else if (e instanceof JSONException) {
 139                 mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 140             } else if (e instanceof SSLHandshakeException) {
 141                 mLatestResult = ResultType.SSL_INIT_ERROR;
 142             } else {
 143                 mLatestResult = ResultType.UNKNOWN_ERROR;
 144             }
 145             e.printStackTrace();
 146         }
 147
 148         return retval;
 149     }
 150
 151     private boolean isOnline() {
 152         ConnectivityManager cm = (ConnectivityManager) mContext
 153                 .getSystemService(Context.CONNECTIVITY_SERVICE);
 154         return cm != null && cm.getActiveNetworkInfo() != null
 155                 && cm.getActiveNetworkInfo().isConnectedOrConnecting();
 156     }
 157
 158     private void postResult(final ResultType result) {
 159         if (mHandler != null && mListener != null) {
 160             mHandler.post(new Runnable() {
 161                 @Override
 162                 public void run() {
 163                     mListener.onConnectionCheckResult(result);
 164                 }
 165             });
 166         }
 167     }
 168
 169 }