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.utils.Log_OC;
  23
  24
  25 import android.graphics.Bitmap;
  26 import android.os.Handler;
  27 import android.os.Message;
  28 import android.view.View;
  29 import android.webkit.CookieManager;
  30 import android.webkit.WebView;
  31 import android.webkit.WebViewClient;
  32
  33
  34 /**
  35  * Custom {@link WebViewClient} client aimed to catch the end of a single-sign-on process
  36  * running in the {@link WebView} that is attached to.
  37  *
  38  * Assumes that the single-sign-on is kept thanks to a cookie set at the end of the
  39  * authentication process.
  40  *
  41  * @author David A. Velasco
  42  */
  43 public class SsoWebViewClient extends WebViewClient {
  44
  45     private static final String TAG = SsoWebViewClient.class.getSimpleName();
  46
  47     public interface SsoWebViewClientListener {
  48         public void onSsoFinished(String sessionCookie);
  49     }
  50
  51     private Handler mListenerHandler;
  52     private WeakReference<SsoWebViewClientListener> mListenerRef;
  53     private String mTargetUrl;
  54     private String mLastReloadedUrlAtError;
  55
  56     public SsoWebViewClient (Handler listenerHandler, SsoWebViewClientListener listener) {
  57         mListenerHandler = listenerHandler;
  58         mListenerRef = new WeakReference<SsoWebViewClient.SsoWebViewClientListener>(listener);
  59         mTargetUrl = "fake://url.to.be.set";
  60         mLastReloadedUrlAtError = null;
  61     }
  62
  63     public String getTargetUrl() {
  64         return mTargetUrl;
  65     }
  66
  67     public void setTargetUrl(String targetUrl) {
  68         mTargetUrl = targetUrl;
  69     }
  70
  71     @Override
  72     public void onPageStarted (WebView view, String url, Bitmap favicon) {
  73         Log_OC.d(TAG, "onPageStarted : " + url);
  74         super.onPageStarted(view, url, favicon);
  75     }
  76
  77     @Override
  78     public void onFormResubmission (WebView view, Message dontResend, Message resend) {
  79         Log_OC.d(TAG, "onFormResubMission ");
  80
  81         // necessary to grant reload of last page when device orientation is changed after sending a form
  82         resend.sendToTarget();
  83     }
  84
  85     @Override
  86     public boolean shouldOverrideUrlLoading(WebView view, String url) {
  87         return false;
  88     }
  89
  90     @Override
  91     public void onReceivedError (WebView view, int errorCode, String description, String failingUrl) {
  92         Log_OC.e(TAG, "onReceivedError : " + failingUrl + ", code " + errorCode + ", description: " + description);
  93         if (!failingUrl.equals(mLastReloadedUrlAtError)) {
  94             view.reload();
  95             mLastReloadedUrlAtError = failingUrl;
  96         } else {
  97             mLastReloadedUrlAtError = null;
  98             super.onReceivedError(view, errorCode, description, failingUrl);
  99         }
 100     }
 101
 102     @Override
 103     public void onPageFinished (WebView view, String url) {
 104         Log_OC.d(TAG, "onPageFinished : " + url);
 105         mLastReloadedUrlAtError = null;
 106         if (url.startsWith(mTargetUrl)) {
 107             view.setVisibility(View.GONE);
 108             CookieManager cookieManager = CookieManager.getInstance();
 109             final String cookies = cookieManager.getCookie(url);
 110             //Log_OC.d(TAG, "Cookies: " + cookies);
 111             if (mListenerHandler != null && mListenerRef != null) {
 112                 // this is good idea because onPageFinished is not running in the UI thread
 113                 mListenerHandler.post(new Runnable() {
 114                     @Override
 115                     public void run() {
 116                         SsoWebViewClientListener listener = mListenerRef.get();
 117                         if (listener != null) {
 118                             listener.onSsoFinished(cookies);
 119                         }
 120                     }
 121                 });
 122             }
 123         }
 124
 125     }
 126
 127     /*
 128     @Override
 129     public void doUpdateVisitedHistory (WebView view, String url, boolean isReload) {
 130         Log_OC.d(TAG, "doUpdateVisitedHistory : " + url);
 131     }
 132
 133     @Override
 134     public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
 135         Log_OC.d(TAG, "onReceivedSslError : " + error);
 136     }
 137
 138     @Override
 139     public void onReceivedHttpAuthRequest (WebView view, HttpAuthHandler handler, String host, String realm) {
 140         Log_OC.d(TAG, "onReceivedHttpAuthRequest : " + host);
 141     }
 142
 143     @Override
 144     public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
 145         Log_OC.d(TAG, "shouldInterceptRequest : " + url);
 146         return null;
 147     }
 148
 149     @Override
 150     public void onLoadResource (WebView view, String url) {
 151         Log_OC.d(TAG, "onLoadResource : " + url);
 152     }
 153
 154     @Override
 155     public void onReceivedLoginRequest (WebView view, String realm, String account, String args) {
 156         Log_OC.d(TAG, "onReceivedLoginRequest : " + realm + ", " + account + ", " + args);
 157     }
 158
 159     @Override
 160     public void onScaleChanged (WebView view, float oldScale, float newScale) {
 161         Log_OC.d(TAG, "onScaleChanged : " + oldScale + " -> " + newScale);
 162         super.onScaleChanged(view, oldScale, newScale);
 163     }
 164
 165     @Override
 166     public void onUnhandledKeyEvent (WebView view, KeyEvent event) {
 167         Log_OC.d(TAG, "onUnhandledKeyEvent : " + event);
 168     }
 169
 170     @Override
 171     public boolean shouldOverrideKeyEvent (WebView view, KeyEvent event) {
 172         Log_OC.d(TAG, "shouldOverrideKeyEvent : " + event);
 173         return false;
 174     }
 175     */
 176 }