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      1 
      2 /*
      3  * Copyright (C) 2011 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 package com.android.browser.homepages;
     18 
     19 import com.android.browser.BrowserSettings;
     20 
     21 import android.content.ContentProvider;
     22 import android.content.ContentValues;
     23 import android.content.Context;
     24 import android.content.res.AssetFileDescriptor;
     25 import android.database.Cursor;
     26 import android.net.Uri;
     27 import android.os.ParcelFileDescriptor;
     28 import android.util.Log;
     29 import android.webkit.WebResourceResponse;
     30 
     31 import java.io.IOException;
     32 import java.io.InputStream;
     33 
     34 public class HomeProvider extends ContentProvider {
     35 
     36     private static final String TAG = "HomeProvider";
     37     public static final String AUTHORITY = "com.android.browser.home";
     38     public static final String MOST_VISITED = "content://" + AUTHORITY + "/";
     39 
     40     @Override
     41     public int delete(Uri uri, String selection, String[] selectionArgs) {
     42         return 0;
     43     }
     44 
     45     @Override
     46     public String getType(Uri uri) {
     47         return null;
     48     }
     49 
     50     @Override
     51     public Uri insert(Uri uri, ContentValues values) {
     52         return null;
     53     }
     54 
     55     @Override
     56     public boolean onCreate() {
     57         return false;
     58     }
     59 
     60     @Override
     61     public Cursor query(Uri uri, String[] projection, String selection,
     62             String[] selectionArgs, String sortOrder) {
     63         return null;
     64     }
     65 
     66     @Override
     67     public int update(Uri uri, ContentValues values, String selection,
     68             String[] selectionArgs) {
     69         return 0;
     70     }
     71 
     72     @Override
     73     public ParcelFileDescriptor openFile(Uri uri, String mode) {
     74         try {
     75             ParcelFileDescriptor[] pipes = ParcelFileDescriptor.createPipe();
     76             final ParcelFileDescriptor write = pipes[1];
     77             AssetFileDescriptor afd = new AssetFileDescriptor(write, 0, -1);
     78             new RequestHandler(getContext(), uri, afd.createOutputStream()).start();
     79             return pipes[0];
     80         } catch (IOException e) {
     81             Log.e(TAG, "Failed to handle request: " + uri, e);
     82             return null;
     83         }
     84     }
     85 
     86     public static WebResourceResponse shouldInterceptRequest(Context context,
     87             String url) {
     88         try {
     89             boolean useMostVisited = BrowserSettings.getInstance().useMostVisitedHomepage();
     90             if (useMostVisited && url.startsWith("content://")) {
     91                 Uri uri = Uri.parse(url);
     92                 if (AUTHORITY.equals(uri.getAuthority())) {
     93                     InputStream ins = context.getContentResolver()
     94                             .openInputStream(uri);
     95                     return new WebResourceResponse("text/html", "utf-8", ins);
     96                 }
     97             }
     98         } catch (Exception e) {}
     99         return null;
    100     }
    101 
    102 }
    103