1/*
2 * Copyright (c) 2008-2009, Motorola, Inc.
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * - Neither the name of the Motorola, Inc. nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.android.bluetooth.opp;
34
35import android.content.ContentResolver;
36import android.content.Context;
37import android.content.res.AssetFileDescriptor;
38import android.database.Cursor;
39import android.database.sqlite.SQLiteException;
40import android.net.Uri;
41import android.provider.OpenableColumns;
42import android.util.EventLog;
43import android.util.Log;
44
45import java.io.File;
46import java.io.FileInputStream;
47import java.io.FileNotFoundException;
48import java.io.IOException;
49
50/**
51 * This class stores information about a single sending file It will only be
52 * used for outbound share.
53 */
54public class BluetoothOppSendFileInfo {
55    private static final String TAG = "BluetoothOppSendFileInfo";
56
57    private static final boolean D = Constants.DEBUG;
58
59
60    /** Reusable SendFileInfo for error status. */
61    static final BluetoothOppSendFileInfo SEND_FILE_INFO_ERROR = new BluetoothOppSendFileInfo(
62            null, null, 0, null, BluetoothShare.STATUS_FILE_ERROR);
63
64    /** readable media file name */
65    public final String mFileName;
66
67    /** media file input stream */
68    public final FileInputStream mInputStream;
69
70    /** vCard string data */
71    public final String mData;
72
73    public final int mStatus;
74
75    public final String mMimetype;
76
77    public final long mLength;
78
79    /** for media file */
80    public BluetoothOppSendFileInfo(String fileName, String type, long length,
81            FileInputStream inputStream, int status) {
82        mFileName = fileName;
83        mMimetype = type;
84        mLength = length;
85        mInputStream = inputStream;
86        mStatus = status;
87        mData = null;
88    }
89
90    /** for vCard, or later for vCal, vNote. Not used currently */
91    public BluetoothOppSendFileInfo(String data, String type, long length, int status) {
92        mFileName = null;
93        mInputStream = null;
94        mData = data;
95        mMimetype = type;
96        mLength = length;
97        mStatus = status;
98    }
99
100    public static BluetoothOppSendFileInfo generateFileInfo(
101            Context context, Uri uri, String type, boolean fromExternal) {
102        ContentResolver contentResolver = context.getContentResolver();
103        String scheme = uri.getScheme();
104        String fileName = null;
105        String contentType;
106        long length = 0;
107        // Support all Uri with "content" scheme
108        // This will allow more 3rd party applications to share files via
109        // bluetooth
110        if ("content".equals(scheme)) {
111            contentType = contentResolver.getType(uri);
112            Cursor metadataCursor;
113            try {
114                metadataCursor = contentResolver.query(uri, new String[] {
115                        OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE
116                }, null, null, null);
117            } catch (SQLiteException e) {
118                // some content providers don't support the DISPLAY_NAME or SIZE columns
119                metadataCursor = null;
120            } catch (SecurityException e) {
121                Log.e(TAG, "generateFileInfo: Permission error, could not access URI: " + uri);
122                return SEND_FILE_INFO_ERROR;
123            }
124
125            if (metadataCursor != null) {
126                try {
127                    if (metadataCursor.moveToFirst()) {
128                        fileName = metadataCursor.getString(
129                                metadataCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
130                        length = metadataCursor.getLong(
131                                metadataCursor.getColumnIndex(OpenableColumns.SIZE));
132                        if (D) Log.d(TAG, "fileName = " + fileName + " length = " + length);
133                    }
134                } finally {
135                    metadataCursor.close();
136                }
137            }
138            if (fileName == null) {
139                // use last segment of URI if DISPLAY_NAME query fails
140                fileName = uri.getLastPathSegment();
141            }
142        } else if ("file".equals(scheme)) {
143            if (uri.getPath() == null) {
144                Log.e(TAG, "Invalid URI path: " + uri);
145                return SEND_FILE_INFO_ERROR;
146            }
147            if (fromExternal && !BluetoothOppUtility.isInExternalStorageDir(uri)) {
148                EventLog.writeEvent(0x534e4554, "35310991", -1, uri.getPath());
149                Log.e(TAG,
150                        "File based URI not in Environment.getExternalStorageDirectory() is not allowed.");
151                return SEND_FILE_INFO_ERROR;
152            }
153            fileName = uri.getLastPathSegment();
154            contentType = type;
155            File f = new File(uri.getPath());
156            length = f.length();
157        } else {
158            // currently don't accept other scheme
159            return SEND_FILE_INFO_ERROR;
160        }
161        FileInputStream is = null;
162        if (scheme.equals("content")) {
163            try {
164                // We've found that content providers don't always have the
165                // right size in _OpenableColumns.SIZE
166                // As a second source of getting the correct file length,
167                // get a file descriptor and get the stat length
168                AssetFileDescriptor fd = contentResolver.openAssetFileDescriptor(uri, "r");
169                long statLength = fd.getLength();
170                if (length != statLength && statLength > 0) {
171                    Log.e(TAG, "Content provider length is wrong (" + Long.toString(length) +
172                            "), using stat length (" + Long.toString(statLength) + ")");
173                    length = statLength;
174                }
175
176                try {
177                    // This creates an auto-closing input-stream, so
178                    // the file descriptor will be closed whenever the InputStream
179                    // is closed.
180                    is = fd.createInputStream();
181
182                    // If the database doesn't contain the file size, get the size
183                    // by reading through the entire stream
184                    if (length == 0) {
185                        length = getStreamSize(is);
186                        Log.w(TAG, "File length not provided. Length from stream = "
187                                   + length);
188                        // Reset the stream
189                        fd = contentResolver.openAssetFileDescriptor(uri, "r");
190                        is = fd.createInputStream();
191                    }
192                } catch (IOException e) {
193                    try {
194                        fd.close();
195                    } catch (IOException e2) {
196                        // Ignore
197                    }
198                }
199            } catch (FileNotFoundException e) {
200                // Ignore
201            }
202        }
203
204        if (is == null) {
205            try {
206                is = (FileInputStream) contentResolver.openInputStream(uri);
207
208                // If the database doesn't contain the file size, get the size
209                // by reading through the entire stream
210                if (length == 0) {
211                    length = getStreamSize(is);
212                    // Reset the stream
213                    is = (FileInputStream) contentResolver.openInputStream(uri);
214                }
215            } catch (FileNotFoundException e) {
216                return SEND_FILE_INFO_ERROR;
217            } catch (IOException e) {
218                return SEND_FILE_INFO_ERROR;
219            }
220        }
221
222        if (length == 0) {
223            Log.e(TAG, "Could not determine size of file");
224            return SEND_FILE_INFO_ERROR;
225        } else if (length > 0xffffffffL) {
226            String msg = "Files bigger than 4GB can't be transferred";
227            Log.e(TAG, msg);
228            throw new IllegalArgumentException(msg);
229        }
230
231        return new BluetoothOppSendFileInfo(fileName, contentType, length, is, 0);
232    }
233
234    private static long getStreamSize(FileInputStream is) throws IOException {
235        long length = 0;
236        byte unused[] = new byte[4096];
237        int bytesRead = is.read(unused, 0, 4096);
238        while (bytesRead != -1) {
239            length += bytesRead;
240            bytesRead = is.read(unused, 0, 4096);
241        }
242        return length;
243    }
244}
245