src/com/owncloud/android/authentication/SsoWebViewClient.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013 ownCloud Inc.
   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 version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17
  18 package com.owncloud.android.authentication;
  19
  20 import java.lang.ref.WeakReference;
  21
  22 import com.owncloud.android.Log_OC;
  23
  24 import android.graphics.Bitmap;
  25 import android.os.Handler;
  26 import android.os.Message;
  27 import android.view.View;
  28 import android.webkit.CookieManager;
  29 import android.webkit.WebView;
  30 import android.webkit.WebViewClient;
  31
  32
  33 /**
  34  * Custom {@link WebViewClient} client aimed to catch the end of a single-sign-on process
  35  * running in the {@link WebView} that is attached to.
  36  *
  37  * Assumes that the single-sign-on is kept thanks to a cookie set at the end of the
  38  * authentication process.
  39  *
  40  * @author David A. Velasco
  41  */
  42 public class SsoWebViewClient extends WebViewClient {
  43
  44     private static final String TAG = SsoWebViewClient.class.getSimpleName();
  45
  46     public interface SsoWebViewClientListener {
  47         public void onSsoFinished(String sessionCookie);
  48     }
  49
  50     private Handler mListenerHandler;
  51     private WeakReference<SsoWebViewClientListener> mListenerRef;
  52     private String mTargetUrl;
  53     private String mLastReloadedUrlAtError;
  54
  55     public SsoWebViewClient (Handler listenerHandler, SsoWebViewClientListener listener) {
  56         mListenerHandler = listenerHandler;
  57         mListenerRef = new WeakReference<SsoWebViewClient.SsoWebViewClientListener>(listener);
  58         mTargetUrl = "fake://url.to.be.set";
  59         mLastReloadedUrlAtError = null;
  60     }
  61
  62     public String getTargetUrl() {
  63         return mTargetUrl;
  64     }
  65
  66     public void setTargetUrl(String targetUrl) {
  67         mTargetUrl = targetUrl;
  68     }
  69
  70     @Override
  71     public void onPageStarted (WebView view, String url, Bitmap favicon) {
  72         Log_OC.d(TAG, "onPageStarted : " + url);
  73         if (url.startsWith(mTargetUrl)) {
  74             view.setVisibility(View.GONE);
  75             CookieManager cookieManager = CookieManager.getInstance();
  76             final String cookies = cookieManager.getCookie(url);
  77             Log_OC.d(TAG, "Cookies: " + cookies);
  78             if (mListenerHandler != null && mListenerRef != null) {
  79                 // this is good idea because onPageStarted is not running in the UI thread
  80                 mListenerHandler.post(new Runnable() {
  81                     @Override
  82                     public void run() {
  83                         SsoWebViewClientListener listener = mListenerRef.get();
  84                         if (listener != null) {
  85                             listener.onSsoFinished(cookies);
  86                         }
  87                     }
  88                 });
  89             }
  90         }
  91     }
  92
  93     @Override
  94     public void onFormResubmission (WebView view, Message dontResend, Message resend) {
  95         Log_OC.d(TAG, "onFormResubMission ");
  96
  97         // necessary to grant reload of last page when device orientation is changed after sending a form
  98         resend.sendToTarget();
  99     }
 100
 101     @Override
 102     public boolean shouldOverrideUrlLoading(WebView view, String url) {
 103         return false;
 104     }
 105
 106     @Override
 107     public void onReceivedError (WebView view, int errorCode, String description, String failingUrl) {
 108         Log_OC.e(TAG, "onReceivedError : " + failingUrl + ", code " + errorCode + ", description: " + description);
 109         if (!failingUrl.equals(mLastReloadedUrlAtError)) {
 110             view.reload();
 111             mLastReloadedUrlAtError = failingUrl;
 112         } else {
 113             mLastReloadedUrlAtError = null;
 114             super.onReceivedError(view, errorCode, description, failingUrl);
 115         }
 116     }
 117
 118     @Override
 119     public void onPageFinished (WebView view, String url) {
 120         Log_OC.d(TAG, "onPageFinished : " + url);
 121         mLastReloadedUrlAtError = null;
 122     }
 123
 124     /*
 125     @Override
 126     public void doUpdateVisitedHistory (WebView view, String url, boolean isReload) {
 127         Log_OC.d(TAG, "doUpdateVisitedHistory : " + url);
 128     }
 129
 130     @Override
 131     public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
 132         Log_OC.d(TAG, "onReceivedSslError : " + error);
 133     }
 134
 135     @Override
 136     public void onReceivedHttpAuthRequest (WebView view, HttpAuthHandler handler, String host, String realm) {
 137         Log_OC.d(TAG, "onReceivedHttpAuthRequest : " + host);
 138     }
 139
 140     @Override
 141     public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
 142         Log_OC.d(TAG, "shouldInterceptRequest : " + url);
 143         return null;
 144     }
 145
 146     @Override
 147     public void onLoadResource (WebView view, String url) {
 148         Log_OC.d(TAG, "onLoadResource : " + url);
 149     }
 150
 151     @Override
 152     public void onReceivedLoginRequest (WebView view, String realm, String account, String args) {
 153         Log_OC.d(TAG, "onReceivedLoginRequest : " + realm + ", " + account + ", " + args);
 154     }
 155
 156     @Override
 157     public void onScaleChanged (WebView view, float oldScale, float newScale) {
 158         Log_OC.d(TAG, "onScaleChanged : " + oldScale + " -> " + newScale);
 159         super.onScaleChanged(view, oldScale, newScale);
 160     }
 161
 162     @Override
 163     public void onUnhandledKeyEvent (WebView view, KeyEvent event) {
 164         Log_OC.d(TAG, "onUnhandledKeyEvent : " + event);
 165     }
 166
 167     @Override
 168     public boolean shouldOverrideKeyEvent (WebView view, KeyEvent event) {
 169         Log_OC.d(TAG, "shouldOverrideKeyEvent : " + event);
 170         return false;
 171     }
 172     */
 173 }