src/com/owncloud/android/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 com.owncloud.android.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 com.owncloud.android.AccountUtils;
  33 import com.owncloud.android.authenticator.OnConnectCheckListener.ResultType;
  34 import com.owncloud.android.utils.OwnCloudVersion;
  35
  36 import eu.alefzero.webdav.WebdavClient;
  37 import android.content.Context;
  38 import android.net.ConnectivityManager;
  39 import android.net.Uri;
  40 import android.os.Handler;
  41 import android.util.Log;
  42
  43 public class ConnectionCheckerRunnable implements Runnable {
  44
  45     /** Maximum time to wait for a response from the server when the connection is being tested, in MILLISECONDs.  */
  46     public static final int TRY_CONNECTION_TIMEOUT = 5000;
  47
  48     private static final String TAG = "ConnectionCheckerRunnable";
  49     private OnConnectCheckListener mListener;
  50     private String mUrl;
  51     private Handler mHandler;
  52     private ResultType mLatestResult;
  53     private Context mContext;
  54     private OwnCloudVersion mOCVersion;
  55
  56     public void setListener(OnConnectCheckListener listener, Handler handler) {
  57         mListener = listener;
  58         mHandler = handler;
  59     }
  60
  61     public ConnectionCheckerRunnable(String url, Context context) {
  62         mListener = null;
  63         mHandler = null;
  64         mUrl = url;
  65         mContext = context;
  66         mOCVersion = null;
  67     }
  68
  69     @Override
  70     public void run() {
  71
  72         if (!isOnline()) {
  73             postResult(ResultType.NO_NETWORK_CONNECTION);
  74             return;
  75         }
  76         if (mUrl.startsWith("http://") || mUrl.startsWith("https://")) {
  77             mLatestResult = (mUrl.startsWith("https://"))? ResultType.OK_SSL : ResultType.OK_NO_SSL;
  78             tryConnection(Uri.parse(mUrl + AccountUtils.STATUS_PATH));
  79             postResult(mLatestResult);
  80         } else {
  81             Uri uri = Uri.parse("https://" + mUrl + AccountUtils.STATUS_PATH);
  82             if (tryConnection(uri)) {
  83                 postResult(ResultType.OK_SSL);
  84                 return;
  85             }
  86             Log.d(TAG,
  87                     "establishing secure connection failed, trying non secure connection");
  88             uri = Uri.parse("http://" + mUrl + AccountUtils.STATUS_PATH);
  89
  90             if (tryConnection(uri)) {
  91                 postResult(ResultType.OK_NO_SSL);
  92                 return;
  93             }
  94             postResult(mLatestResult);
  95         }
  96     }
  97
  98     public OwnCloudVersion getDiscoveredVersion() {
  99         return mOCVersion;
 100     }
 101
 102     private boolean tryConnection(Uri uri) {
 103         WebdavClient wc = new WebdavClient();
 104         wc.allowSelfsignedCertificates();
 105         GetMethod get = new GetMethod(uri.toString());
 106         boolean retval = false;
 107         try {
 108             int status = wc.executeMethod(get, TRY_CONNECTION_TIMEOUT);
 109             switch (status) {
 110             case HttpStatus.SC_OK: {
 111                 String response = get.getResponseBodyAsString();
 112                 JSONObject json = new JSONObject(response);
 113                 if (!json.getBoolean("installed")) {
 114                     mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 115                     break;
 116                 }
 117                 mOCVersion = new OwnCloudVersion(json.getString("version"));
 118                 if (!mOCVersion.isVersionValid())
 119                     break;
 120                 retval = true;
 121                 break;
 122             }
 123             case HttpStatus.SC_NOT_FOUND:
 124                 mLatestResult = ResultType.FILE_NOT_FOUND;
 125                 break;
 126             case HttpStatus.SC_INTERNAL_SERVER_ERROR:
 127                 mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 128                 break;
 129             default:
 130                 mLatestResult = ResultType.UNKNOWN_ERROR;
 131                 Log.e(TAG, "Not handled status received from server: " + status);
 132             }
 133
 134         } catch (Exception e) {
 135             if (e instanceof UnknownHostException
 136                     || e instanceof ConnectException
 137                     || e instanceof SocketTimeoutException) {
 138                 mLatestResult = ResultType.HOST_NOT_AVAILABLE;
 139             } else if (e instanceof JSONException) {
 140                 mLatestResult = ResultType.INSTANCE_NOT_CONFIGURED;
 141             } else if (e instanceof SSLHandshakeException) {
 142                 mLatestResult = ResultType.SSL_INIT_ERROR;
 143             } else {
 144                 mLatestResult = ResultType.UNKNOWN_ERROR;
 145             }
 146             e.printStackTrace();
 147         }
 148
 149         return retval;
 150     }
 151
 152     private boolean isOnline() {
 153         ConnectivityManager cm = (ConnectivityManager) mContext
 154                 .getSystemService(Context.CONNECTIVITY_SERVICE);
 155         return cm != null && cm.getActiveNetworkInfo() != null
 156                 && cm.getActiveNetworkInfo().isConnectedOrConnecting();
 157     }
 158
 159     private void postResult(final ResultType result) {
 160         if (mHandler != null && mListener != null) {
 161             mHandler.post(new Runnable() {
 162                 @Override
 163                 public void run() {
 164                     mListener.onConnectionCheckResult(result);
 165                 }
 166             });
 167         }
 168     }
 169
 170 }