BluetoothOppSendFileInfo.java revision 9c11dad35ee454d303b4f56a87042fc094bb61d8 
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.Log;
43
44import java.io.File;
45import java.io.FileInputStream;
46import java.io.FileNotFoundException;
47import java.io.IOException;
48
49/**
50 * This class stores information about a single sending file It will only be
51 * used for outbound share.
52 */
53public class BluetoothOppSendFileInfo {
54    private static final String TAG = "BluetoothOppSendFileInfo";
55
56    private static final boolean D = Constants.DEBUG;
57
58
59    /** Reusable SendFileInfo for error status. */
60    static final BluetoothOppSendFileInfo SEND_FILE_INFO_ERROR = new BluetoothOppSendFileInfo(
61            null, null, 0, null, BluetoothShare.STATUS_FILE_ERROR);
62
63    /** readable media file name */
64    public final String mFileName;
65
66    /** media file input stream */
67    public final FileInputStream mInputStream;
68
69    /** vCard string data */
70    public final String mData;
71
72    public final int mStatus;
73
74    public final String mMimetype;
75
76    public final long mLength;
77
78    /** for media file */
79    public BluetoothOppSendFileInfo(String fileName, String type, long length,
80            FileInputStream inputStream, int status) {
81        mFileName = fileName;
82        mMimetype = type;
83        mLength = length;
84        mInputStream = inputStream;
85        mStatus = status;
86        mData = null;
87    }
88
89    /** for vCard, or later for vCal, vNote. Not used currently */
90    public BluetoothOppSendFileInfo(String data, String type, long length, int status) {
91        mFileName = null;
92        mInputStream = null;
93        mData = data;
94        mMimetype = type;
95        mLength = length;
96        mStatus = status;
97    }
98
99    public static BluetoothOppSendFileInfo generateFileInfo(Context context, Uri uri,
100            String type) {
101        ContentResolver contentResolver = context.getContentResolver();
102        String scheme = uri.getScheme();
103        String fileName = null;
104        String contentType;
105        long length = 0;
106        // Support all Uri with "content" scheme
107        // This will allow more 3rd party applications to share files via
108        // bluetooth
109        if ("content".equals(scheme)) {
110            contentType = contentResolver.getType(uri);
111            Cursor metadataCursor;
112            try {
113                metadataCursor = contentResolver.query(uri, new String[] {
114                        OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE
115                }, null, null, null);
116            } catch (SQLiteException e) {
117                // some content providers don't support the DISPLAY_NAME or SIZE columns
118                metadataCursor = null;
119            } catch (SecurityException e) {
120                Log.e(TAG, "generateFileInfo: Permission error, could not access URI: " + uri);
121                return SEND_FILE_INFO_ERROR;
122            }
123
124            if (metadataCursor != null) {
125                try {
126                    if (metadataCursor.moveToFirst()) {
127                        fileName = metadataCursor.getString(
128                                metadataCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
129                        length = metadataCursor.getLong(
130                                metadataCursor.getColumnIndex(OpenableColumns.SIZE));
131                        if (D) Log.d(TAG, "fileName = " + fileName + " length = " + length);
132                    }
133                } finally {
134                    metadataCursor.close();
135                }
136            }
137            if (fileName == null) {
138                // use last segment of URI if DISPLAY_NAME query fails
139                fileName = uri.getLastPathSegment();
140            }
141        } else if ("file".equals(scheme)) {
142            fileName = uri.getLastPathSegment();
143            contentType = type;
144            File f = new File(uri.getPath());
145            length = f.length();
146        } else {
147            // currently don't accept other scheme
148            return SEND_FILE_INFO_ERROR;
149        }
150        FileInputStream is = null;
151        if (scheme.equals("content")) {
152            try {
153                // We've found that content providers don't always have the
154                // right size in _OpenableColumns.SIZE
155                // As a second source of getting the correct file length,
156                // get a file descriptor and get the stat length
157                AssetFileDescriptor fd = contentResolver.openAssetFileDescriptor(uri, "r");
158                long statLength = fd.getLength();
159                if (length != statLength && statLength > 0) {
160                    Log.e(TAG, "Content provider length is wrong (" + Long.toString(length) +
161                            "), using stat length (" + Long.toString(statLength) + ")");
162                    length = statLength;
163                }
164
165                try {
166                    // This creates an auto-closing input-stream, so
167                    // the file descriptor will be closed whenever the InputStream
168                    // is closed.
169                    is = fd.createInputStream();
170
171                    // If the database doesn't contain the file size, get the size
172                    // by reading through the entire stream
173                    if (length == 0) {
174                        length = getStreamSize(is);
175                        Log.w(TAG, "File length not provided. Length from stream = "
176                                   + length);
177                        // Reset the stream
178                        fd = contentResolver.openAssetFileDescriptor(uri, "r");
179                        is = fd.createInputStream();
180                    }
181                } catch (IOException e) {
182                    try {
183                        fd.close();
184                    } catch (IOException e2) {
185                        // Ignore
186                    }
187                }
188            } catch (FileNotFoundException e) {
189                // Ignore
190            }
191        }
192
193        if (is == null) {
194            try {
195                is = (FileInputStream) contentResolver.openInputStream(uri);
196
197                // If the database doesn't contain the file size, get the size
198                // by reading through the entire stream
199                if (length == 0) {
200                    length = getStreamSize(is);
201                    // Reset the stream
202                    is = (FileInputStream) contentResolver.openInputStream(uri);
203                }
204            } catch (FileNotFoundException e) {
205                return SEND_FILE_INFO_ERROR;
206            } catch (IOException e) {
207                return SEND_FILE_INFO_ERROR;
208            }
209        }
210
211        if (length == 0) {
212            Log.e(TAG, "Could not determine size of file");
213            return SEND_FILE_INFO_ERROR;
214        } else if (length > 0xffffffffL) {
215            String msg = "Files bigger than 4GB can't be transferred";
216            Log.e(TAG, msg);
217            throw new IllegalArgumentException(msg);
218        }
219
220        return new BluetoothOppSendFileInfo(fileName, contentType, length, is, 0);
221    }
222
223    private static long getStreamSize(FileInputStream is) throws IOException {
224        long length = 0;
225        byte unused[] = new byte[4096];
226        int bytesRead = is.read(unused, 0, 4096);
227        while (bytesRead != -1) {
228            length += bytesRead;
229            bytesRead = is.read(unused, 0, 4096);
230        }
231        return length;
232    }
233}
234