oc_framework/src/com/owncloud/android/oc_framework/accounts/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.oc_framework.accounts;
  19
  20 import java.lang.ref.WeakReference;
  21
  22 import android.graphics.Bitmap;
  23 import android.net.http.SslError;
  24 import android.os.Handler;
  25 import android.os.Message;
  26 import android.util.Log;
  27 import android.view.KeyEvent;
  28 import android.view.View;
  29 import android.webkit.CookieManager;
  30 import android.webkit.HttpAuthHandler;
  31 import android.webkit.SslErrorHandler;
  32 import android.webkit.WebResourceResponse;
  33 import android.webkit.WebView;
  34 import android.webkit.WebViewClient;
  35
  36
  37 /**
  38  * Custom {@link WebViewClient} client aimed to catch the end of a single-sign-on process
  39  * running in the {@link WebView} that is attached to.
  40  *
  41  * Assumes that the single-sign-on is kept thanks to a cookie set at the end of the
  42  * authentication process.
  43  *
  44  * @author David A. Velasco
  45  */
  46 public class SsoWebViewClient extends WebViewClient {
  47
  48     private static final String TAG = SsoWebViewClient.class.getSimpleName();
  49
  50     public interface SsoWebViewClientListener {
  51         public void onSsoFinished(String sessionCookie);
  52     }
  53
  54     private Handler mListenerHandler;
  55     private WeakReference<SsoWebViewClientListener> mListenerRef;
  56     private String mTargetUrl;
  57     private String mLastReloadedUrlAtError;
  58
  59     public SsoWebViewClient (Handler listenerHandler, SsoWebViewClientListener listener) {
  60         mListenerHandler = listenerHandler;
  61         mListenerRef = new WeakReference<SsoWebViewClient.SsoWebViewClientListener>(listener);
  62         mTargetUrl = "fake://url.to.be.set";
  63         mLastReloadedUrlAtError = null;
  64     }
  65
  66     public String getTargetUrl() {
  67         return mTargetUrl;
  68     }
  69
  70     public void setTargetUrl(String targetUrl) {
  71         mTargetUrl = targetUrl;
  72     }
  73
  74     @Override
  75     public void onPageStarted (WebView view, String url, Bitmap favicon) {
  76         Log.d(TAG, "onPageStarted : " + url);
  77         super.onPageStarted(view, url, favicon);
  78     }
  79
  80     @Override
  81     public void onFormResubmission (WebView view, Message dontResend, Message resend) {
  82         Log.d(TAG, "onFormResubMission ");
  83
  84         // necessary to grant reload of last page when device orientation is changed after sending a form
  85         resend.sendToTarget();
  86     }
  87
  88     @Override
  89     public boolean shouldOverrideUrlLoading(WebView view, String url) {
  90         return false;
  91     }
  92
  93     @Override
  94     public void onReceivedError (WebView view, int errorCode, String description, String failingUrl) {
  95         Log.e(TAG, "onReceivedError : " + failingUrl + ", code " + errorCode + ", description: " + description);
  96         if (!failingUrl.equals(mLastReloadedUrlAtError)) {
  97             view.reload();
  98             mLastReloadedUrlAtError = failingUrl;
  99         } else {
 100             mLastReloadedUrlAtError = null;
 101             super.onReceivedError(view, errorCode, description, failingUrl);
 102         }
 103     }
 104
 105     @Override
 106     public void onPageFinished (WebView view, String url) {
 107         Log.d(TAG, "onPageFinished : " + url);
 108         mLastReloadedUrlAtError = null;
 109         if (url.startsWith(mTargetUrl)) {
 110             view.setVisibility(View.GONE);
 111             CookieManager cookieManager = CookieManager.getInstance();
 112             final String cookies = cookieManager.getCookie(url);
 113             Log.d(TAG, "Cookies: " + cookies);
 114             if (mListenerHandler != null && mListenerRef != null) {
 115                 // this is good idea because onPageFinished is not running in the UI thread
 116                 mListenerHandler.post(new Runnable() {
 117                     @Override
 118                     public void run() {
 119                         SsoWebViewClientListener listener = mListenerRef.get();
 120                         if (listener != null) {
 121                                 // Send Cookies to the listener
 122                             listener.onSsoFinished(cookies);
 123                         }
 124                     }
 125                 });
 126             }
 127         }
 128     }
 129
 130
 131     @Override
 132     public void doUpdateVisitedHistory (WebView view, String url, boolean isReload) {
 133         Log.d(TAG, "doUpdateVisitedHistory : " + url);
 134     }
 135
 136     @Override
 137     public void onReceivedSslError (WebView view, SslErrorHandler handler, SslError error) {
 138         Log.d(TAG, "onReceivedSslError : " + error);
 139         handler.proceed();
 140     }
 141
 142     @Override
 143     public void onReceivedHttpAuthRequest (WebView view, HttpAuthHandler handler, String host, String realm) {
 144         Log.d(TAG, "onReceivedHttpAuthRequest : " + host);
 145     }
 146
 147     @Override
 148     public WebResourceResponse shouldInterceptRequest (WebView view, String url) {
 149         Log.d(TAG, "shouldInterceptRequest : " + url);
 150         return null;
 151     }
 152
 153     @Override
 154     public void onLoadResource (WebView view, String url) {
 155         Log.d(TAG, "onLoadResource : " + url);
 156     }
 157
 158     @Override
 159     public void onReceivedLoginRequest (WebView view, String realm, String account, String args) {
 160         Log.d(TAG, "onReceivedLoginRequest : " + realm + ", " + account + ", " + args);
 161     }
 162
 163     @Override
 164     public void onScaleChanged (WebView view, float oldScale, float newScale) {
 165         Log.d(TAG, "onScaleChanged : " + oldScale + " -> " + newScale);
 166         super.onScaleChanged(view, oldScale, newScale);
 167     }
 168
 169     @Override
 170     public void onUnhandledKeyEvent (WebView view, KeyEvent event) {
 171         Log.d(TAG, "onUnhandledKeyEvent : " + event);
 172     }
 173
 174     @Override
 175     public boolean shouldOverrideKeyEvent (WebView view, KeyEvent event) {
 176         Log.d(TAG, "shouldOverrideKeyEvent : " + event);
 177         return false;
 178     }
 179
 180 }