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         super.onPageStarted(view, url, favicon);
  74     }
  75
  76     @Override
  77     public void onFormResubmission (WebView view, Message dontResend, Message resend) {
  78         Log_OC.d(TAG, "onFormResubMission ");
  79
  80         // necessary to grant reload of last page when device orientation is changed after sending a form
  81         resend.sendToTarget();
  82     }
  83
  84     @Override
  85     public boolean shouldOverrideUrlLoading(WebView view, String url) {
  86         return false;
  87     }
  88
  89     @Override
  90     public void onReceivedError (WebView view, int errorCode, String description, String failingUrl) {
  91         Log_OC.e(TAG, "onReceivedError : " + failingUrl + ", code " + errorCode + ", description: " + description);
  92         if (!failingUrl.equals(mLastReloadedUrlAtError)) {
  93             view.reload();
  94             mLastReloadedUrlAtError = failingUrl;
  95         } else {
  96             mLastReloadedUrlAtError = null;
  97             super.onReceivedError(view, errorCode, description, failingUrl);
  98         }
  99     }
 100
 101     @Override
 102     public void onPageFinished (WebView view, String url) {
 103         Log_OC.d(TAG, "onPageFinished : " + url);
 104         mLastReloadedUrlAtError = null;
 105         if (url.startsWith(mTargetUrl)) {
 106             view.setVisibility(View.GONE);
 107             CookieManager cookieManager = CookieManager.getInstance();
 108             final String cookies = cookieManager.getCookie(url);
 109             //Log_OC.d(TAG, "Cookies: " + cookies);
 110             if (mListenerHandler != null && mListenerRef != null) {
 111                 // this is good idea because onPageFinished is not running in the UI thread
 112                 mListenerHandler.post(new Runnable() {
 113                     @Override
 114                     public void run() {
 115                         SsoWebViewClientListener listener = mListenerRef.get();
 116                         if (listener != null) {
 117                             listener.onSsoFinished(cookies);
 118                         }
 119                     }
 120                 });
 121             }
 122         }
 123
 124     }
 125
 126     /*
 127     @Override
 128     public void doUpdateVisitedHistory (WebView view, String url, boolean isReload) {
 129         Log_OC.d(TAG, "doUpdateVisitedHistory : " + url);
 130     }
 131
 132     @Override
 133     public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
 134         Log_OC.d(TAG, "onReceivedSslError : " + error);
 135     }
 136
 137     @Override
 138     public void onReceivedHttpAuthRequest (WebView view, HttpAuthHandler handler, String host, String realm) {
 139         Log_OC.d(TAG, "onReceivedHttpAuthRequest : " + host);
 140     }
 141
 142     @Override
 143     public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
 144         Log_OC.d(TAG, "shouldInterceptRequest : " + url);
 145         return null;
 146     }
 147
 148     @Override
 149     public void onLoadResource (WebView view, String url) {
 150         Log_OC.d(TAG, "onLoadResource : " + url);
 151     }
 152
 153     @Override
 154     public void onReceivedLoginRequest (WebView view, String realm, String account, String args) {
 155         Log_OC.d(TAG, "onReceivedLoginRequest : " + realm + ", " + account + ", " + args);
 156     }
 157
 158     @Override
 159     public void onScaleChanged (WebView view, float oldScale, float newScale) {
 160         Log_OC.d(TAG, "onScaleChanged : " + oldScale + " -> " + newScale);
 161         super.onScaleChanged(view, oldScale, newScale);
 162     }
 163
 164     @Override
 165     public void onUnhandledKeyEvent (WebView view, KeyEvent event) {
 166         Log_OC.d(TAG, "onUnhandledKeyEvent : " + event);
 167     }
 168
 169     @Override
 170     public boolean shouldOverrideKeyEvent (WebView view, KeyEvent event) {
 171         Log_OC.d(TAG, "shouldOverrideKeyEvent : " + event);
 172         return false;
 173     }
 174     */
 175 }