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 */
17package com.android.browser.homepages;
18
19import android.content.ContentProvider;
20import android.content.ContentValues;
21import android.content.Context;
22import android.content.res.AssetFileDescriptor;
23import android.database.Cursor;
24import android.net.Uri;
25import android.os.ParcelFileDescriptor;
26import android.util.Log;
27import android.webkit.WebResourceResponse;
28
29import com.android.browser.BrowserSettings;
30
31import java.io.File;
32import java.io.IOException;
33import java.io.InputStream;
34import java.io.PipedInputStream;
35import java.io.PipedOutputStream;
36
37public class HomeProvider extends ContentProvider {
38
39    private static final String TAG = "HomeProvider";
40    public static final String AUTHORITY = "com.android.browser.home";
41    public static final String MOST_VISITED = "content://" + AUTHORITY + "/";
42
43    @Override
44    public int delete(Uri uri, String selection, String[] selectionArgs) {
45        return 0;
46    }
47
48    @Override
49    public String getType(Uri uri) {
50        return null;
51    }
52
53    @Override
54    public Uri insert(Uri uri, ContentValues values) {
55        return null;
56    }
57
58    @Override
59    public boolean onCreate() {
60        return false;
61    }
62
63    @Override
64    public Cursor query(Uri uri, String[] projection, String selection,
65            String[] selectionArgs, String sortOrder) {
66        return null;
67    }
68
69    @Override
70    public int update(Uri uri, ContentValues values, String selection,
71            String[] selectionArgs) {
72        return 0;
73    }
74
75    @Override
76    public ParcelFileDescriptor openFile(Uri uri, String mode) {
77        try {
78            ParcelFileDescriptor[] pipes = ParcelFileDescriptor.createPipe();
79            final ParcelFileDescriptor write = pipes[1];
80            AssetFileDescriptor afd = new AssetFileDescriptor(write, 0, -1);
81            new RequestHandler(getContext(), uri, afd.createOutputStream()).start();
82            return pipes[0];
83        } catch (IOException e) {
84            Log.e(TAG, "Failed to handle request: " + uri, e);
85            return null;
86        }
87    }
88
89    public static WebResourceResponse shouldInterceptRequest(Context context,
90            String url) {
91        try {
92            boolean useMostVisited = BrowserSettings.getInstance().useMostVisitedHomepage();
93            if (useMostVisited && url.startsWith("content://")) {
94                Uri uri = Uri.parse(url);
95                if (AUTHORITY.equals(uri.getAuthority())) {
96                    InputStream ins = context.getContentResolver()
97                            .openInputStream(uri);
98                    return new WebResourceResponse("text/html", "utf-8", ins);
99                }
100            }
101            boolean listFiles = BrowserSettings.getInstance().isDebugEnabled();
102            if (listFiles && interceptFile(url)) {
103                PipedInputStream ins = new PipedInputStream();
104                PipedOutputStream outs = new PipedOutputStream(ins);
105                new RequestHandler(context, Uri.parse(url), outs).start();
106                return new WebResourceResponse("text/html", "utf-8", ins);
107            }
108        } catch (Exception e) {}
109        return null;
110    }
111
112    private static boolean interceptFile(String url) {
113        if (!url.startsWith("file:///")) {
114            return false;
115        }
116        String fpath = url.substring(7);
117        File f = new File(fpath);
118        if (!f.isDirectory()) {
119            return false;
120        }
121        return true;
122    }
123
124}
125