summaryrefslogtreecommitdiffstats
path: root/src/kernel/qlocalfs.cpp
blob: e6017f6b207d3250acf6838029ee4e67dc71ef0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/****************************************************************************
**
** Implementation of QLocalFs class
**
** Created : 950429
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file.  Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/

#include "qlocalfs.h"

#ifndef QT_NO_NETWORKPROTOCOL

#include "qfileinfo.h"
#include "qfile.h"
#include "qurlinfo.h"
#include "qapplication.h"
#include "qurloperator.h"
#include "qguardedptr.h"

//#define QLOCALFS_DEBUG


/*!
    \class QLocalFs qlocalfs.h
    \brief The QLocalFs class is an implementation of a
    QNetworkProtocol that works on the local file system.
\if defined(commercial)
    It is part of the <a href="commercialeditions.html">Qt Enterprise Edition</a>.
\endif

    \module network

    \ingroup io

    This class is derived from QNetworkProtocol. QLocalFs is not
    normally used directly, but rather through a QUrlOperator, for
    example:
    \code
    QUrlOperator op( "file:///tmp" );
    op.listChildren(); // Asks the server to provide a directory listing
    \endcode

    This code will only work if the QLocalFs class is registered; to
    register the class, you must call qInitNetworkProtocols() before
    using a QUrlOperator with QLocalFs.

    If you really need to use QLocalFs directly, don't forget
    to set its QUrlOperator with setUrl().

    \sa \link network.html Qt Network Documentation \endlink QNetworkProtocol, QUrlOperator
*/

/*!
    Constructor.
*/

QLocalFs::QLocalFs()
    : QNetworkProtocol()
{
}

static int convertPermissions(QFileInfo *fi)
{
    int p = 0;
    if ( fi->permission( QFileInfo::ReadOwner ) )
	p |= QUrlInfo::ReadOwner;
    if ( fi->permission( QFileInfo::WriteOwner ) )
	p |= QUrlInfo::WriteOwner;
    if ( fi->permission( QFileInfo::ExeOwner ) )
	p |= QUrlInfo::ExeOwner;
    if ( fi->permission( QFileInfo::ReadGroup ) )
	p |= QUrlInfo::ReadGroup;
    if ( fi->permission( QFileInfo::WriteGroup ) )
	p |= QUrlInfo::WriteGroup;
    if ( fi->permission( QFileInfo::ExeGroup ) )
	p |= QUrlInfo::ExeGroup;
    if ( fi->permission( QFileInfo::ReadOther ) )
	p |= QUrlInfo::ReadOther;
    if ( fi->permission( QFileInfo::WriteOther ) )
	p |= QUrlInfo::WriteOther;
    if ( fi->permission( QFileInfo::ExeOther ) )
	p |= QUrlInfo::ExeOther;
    return p;
}

/*!
    \reimp
*/

void QLocalFs::operationListChildren( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationListChildren" );
#endif
    op->setState( StInProgress );

    dir = QDir( url()->path() );
    dir.setNameFilter( url()->nameFilter() );
    dir.setMatchAllDirs( TRUE );
    if ( !dir.isReadable() ) {
	QString msg = tr( "Could not read directory\n%1" ).arg( url()->path() );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrListChildren );
	emit finished( op );
	return;
    }

    const QFileInfoList *filist = dir.entryInfoList( QDir::All | QDir::Hidden | QDir::System );
    if ( !filist ) {
	QString msg = tr( "Could not read directory\n%1" ).arg( url()->path() );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrListChildren );
	emit finished( op );
	return;
    }

    emit start( op );

    QFileInfoListIterator it( *filist );
    QFileInfo *fi;
    QValueList<QUrlInfo> infos;
    while ( ( fi = it.current() ) != 0 ) {
	++it;
	infos << QUrlInfo( fi->fileName(), convertPermissions(fi), fi->owner(), fi->group(),
			   fi->size(), fi->lastModified(), fi->lastRead(), fi->isDir(), fi->isFile(),
			   fi->isSymLink(), fi->isWritable(), fi->isReadable(), fi->isExecutable() );
    }
    emit newChildren( infos, op );
    op->setState( StDone );
    emit finished( op );
}

/*!
    \reimp
*/

void QLocalFs::operationMkDir( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationMkDir" );
#endif
    op->setState( StInProgress );
    QString dirname = op->arg( 0 );

    dir = QDir( url()->path() );
    if ( dir.mkdir( dirname ) ) {
	QFileInfo fi( dir, dirname );
	QUrlInfo inf( fi.fileName(), convertPermissions(&fi), fi.owner(), fi.group(),
		      fi.size(), fi.lastModified(), fi.lastRead(), fi.isDir(), fi.isFile(),
		      fi.isSymLink(), fi.isWritable(), fi.isReadable(), fi.isExecutable() );
	emit newChild( inf, op );
	op->setState( StDone );
	emit createdDirectory( inf, op );
	emit finished( op );
    } else {
	QString msg = tr( "Could not create directory\n%1" ).arg( dirname );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrMkDir );
	emit finished( op );
    }
}

/*!
    \reimp
*/

void QLocalFs::operationRemove( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationRemove" );
#endif
    op->setState( StInProgress );
    QString name = QUrl( op->arg( 0 ) ).path();
    bool deleted = FALSE;

    dir = QDir( url()->path() );

    QFileInfo fi( dir, name );
    if ( fi.isDir() ) {
	if ( dir.rmdir( name ) )
	    deleted = TRUE;
    }

    if ( deleted || dir.remove( name ) ) {
	op->setState( StDone );
	emit removed( op );
	emit finished( op );
    } else {
	QString msg = tr( "Could not remove file or directory\n%1" ).arg( name );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrRemove );
	emit finished( op );
    }
}

/*!
    \reimp
*/

void QLocalFs::operationRename( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationRename" );
#endif
    op->setState( StInProgress );
    QString oldname = op->arg( 0 );
    QString newname = op->arg( 1 );

    dir = QDir( url()->path() );
    if ( dir.rename( oldname, newname ) ) {
	op->setState( StDone );
	emit itemChanged( op );
	emit finished( op );
    } else {
	QString msg = tr( "Could not rename\n%1\nto\n%2" ).arg( oldname ).arg( newname );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrRename );
	emit finished( op );
    }
}

/*!
    \reimp
*/

void QLocalFs::operationGet( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationGet" );
#endif
    op->setState( StInProgress );
    QString from = QUrl( op->arg( 0 ) ).path();

    QFile f( from );
    if ( !f.open( IO_ReadOnly ) ) {
#ifdef QLOCALFS_DEBUG
	qDebug( "QLocalFs: could not open %s", from.latin1() );
#endif
	QString msg = tr( "Could not open\n%1" ).arg( from );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrGet );
	emit finished( op );
	return;
    }

    QByteArray s;
    emit dataTransferProgress( 0, f.size(), op );
    if ( f.size() != 0 ) {
	int blockSize = calcBlockSize( f.size() );
	if ( (int)f.size() < blockSize ) {
	    s.resize( f.size() );
	    f.readBlock( s.data(), f.size() );
	    emit data( s, op );
	    emit dataTransferProgress( f.size(), f.size(), op );
#ifdef QLOCALFS_DEBUG
	    qDebug( "QLocalFs: got all %d bytes at once", f.size() );
#endif
	} else {
	    s.resize( blockSize );
	    int remaining = f.size();
	    QGuardedPtr<QObject> that = this;
	    while ( that && remaining > 0 ) {
		if ( operationInProgress() != op )
		    return;
		if ( remaining >= blockSize ) {
		    f.readBlock( s.data(), blockSize );
		    emit data( s, op );
		    emit dataTransferProgress( f.size() - remaining, f.size(), op );
		    remaining -= blockSize;
		} else {
		    s.resize( remaining );
		    f.readBlock( s.data(), remaining );
		    emit data( s, op );
		    emit dataTransferProgress( f.size() - remaining, f.size(), op );
		    remaining -= remaining;
		}
                qApp->processEvents();
	    }
	    if (!that)
		return;
#ifdef QLOCALFS_DEBUG
	    qDebug( "QLocalFs: got all %d bytes step by step", f.size() );
#endif
	    emit dataTransferProgress( f.size(), f.size(), op );
	}
    }
    op->setState( StDone );
    f.close();
    emit finished( op );
}

/*!
    \reimp
*/

void QLocalFs::operationPut( QNetworkOperation *op )
{
#ifdef QLOCALFS_DEBUG
    qDebug( "QLocalFs: operationPut" );
#endif
    op->setState( StInProgress );
    QString to = QUrl( op->arg( 0 ) ).path();

    QFile f( to );
    if ( !f.open( IO_WriteOnly ) ) {
	QString msg = tr( "Could not write\n%1" ).arg( to );
	op->setState( StFailed );
	op->setProtocolDetail( msg );
	op->setErrorCode( (int)ErrPut );
	emit finished( op );
	return;
    }

    QByteArray ba( op->rawArg( 1 ) );
    emit dataTransferProgress( 0, ba.size(), op );
    int blockSize = calcBlockSize( ba.size() );
    if ( (int)ba.size() < blockSize ) {
	f.writeBlock( ba.data(), ba.size() );
	emit dataTransferProgress( ba.size(), ba.size(), op );
    } else {
	int i = 0;
	while ( i + blockSize < (int)ba.size() - 1 ) {
	    if ( operationInProgress() != op )
		return;
	    f.writeBlock( &ba.data()[ i ], blockSize );
	    f.flush();
	    emit dataTransferProgress( i + blockSize, ba.size(), op );
	    i += blockSize;
	    QGuardedPtr<QObject> that = this;
            qApp->processEvents();
            if (!that)
                return;
	}
	if ( i < (int)ba.size() - 1 )
	    f.writeBlock( &ba.data()[ i ], ba.size() - i );
	emit dataTransferProgress( ba.size(), ba.size(), op );
    }
    op->setState( StDone );
    f.close();
    emit finished( op );
}

/*!
    \reimp
*/

int QLocalFs::supportedOperations() const
{
    return OpListChildren | OpMkDir | OpRemove | OpRename | OpGet | OpPut;
}

/*!
    \internal
*/

int QLocalFs::calcBlockSize( int totalSize ) const
{
    if ( totalSize == 0 )
	return 1024;
    int s = totalSize / 100;
    // we want a block size between 1KB and 1MB
    if ( s < 1024 )
	s = 1024;
    if ( s > 1048576 )
	s = 1048576;
    return s;
}

#endif // QT_NO_NETWORKPROTOCOL