summaryrefslogtreecommitdiffstats
path: root/src/network/access/qnetworkaccessftpbackend.cpp
blob: 9be433da1edf2f0a187e05b516f5c3dca5173f00 (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
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qnetworkaccessftpbackend_p.h"
#include "qnetworkaccessmanager_p.h"
#include "QtNetwork/qauthenticator.h"
#include "private/qnoncontiguousbytedevice_p.h"

#ifndef QT_NO_FTP

QT_BEGIN_NAMESPACE

enum {
    DefaultFtpPort = 21
};

static QByteArray makeCacheKey(const QUrl &url)
{
    QUrl copy = url;
    copy.setPort(url.port(DefaultFtpPort));
    return "ftp-connection:" +
        copy.toEncoded(QUrl::RemovePassword | QUrl::RemovePath | QUrl::RemoveQuery |
                       QUrl::RemoveFragment);
}

QNetworkAccessBackend *
QNetworkAccessFtpBackendFactory::create(QNetworkAccessManager::Operation op,
                                        const QNetworkRequest &request) const
{
    // is it an operation we know of?
    switch (op) {
    case QNetworkAccessManager::GetOperation:
    case QNetworkAccessManager::PutOperation:
        break;

    default:
        // no, we can't handle this operation
        return 0;
    }

    QUrl url = request.url();
    if (url.scheme() == QLatin1String("ftp"))
        return new QNetworkAccessFtpBackend;
    return 0;
}

class QNetworkAccessFtpFtp: public QFtp, public QNetworkAccessCache::CacheableObject
{
    // Q_OBJECT
public:
    QNetworkAccessFtpFtp()
    {
        setExpires(true);
        setShareable(false);
    }

    void dispose()
    {
        connect(this, SIGNAL(done(bool)), this, SLOT(deleteLater()));
        close();
    }
};

QNetworkAccessFtpBackend::QNetworkAccessFtpBackend()
    : ftp(0), uploadDevice(0), totalBytes(0), helpId(-1), sizeId(-1), mdtmId(-1),
    supportsSize(false), supportsMdtm(false), state(Idle)
{
}

QNetworkAccessFtpBackend::~QNetworkAccessFtpBackend()
{
    disconnectFromFtp();
}

void QNetworkAccessFtpBackend::open()
{
#ifndef QT_NO_NETWORKPROXY
    QNetworkProxy proxy;
    foreach (const QNetworkProxy &p, proxyList()) {
        // use the first FTP proxy
        // or no proxy at all
        if (p.type() == QNetworkProxy::FtpCachingProxy
            || p.type() == QNetworkProxy::NoProxy) {
            proxy = p;
            break;
        }
    }

    // did we find an FTP proxy or a NoProxy?
    if (proxy.type() == QNetworkProxy::DefaultProxy) {
        // unsuitable proxies
        error(QNetworkReply::ProxyNotFoundError,
              tr("No suitable proxy found"));
        finished();
        return;
    }

#endif

    QUrl url = this->url();
    if (url.path().isEmpty()) {
        url.setPath(QLatin1String("/"));
        setUrl(url);
    }
    if (url.path().endsWith(QLatin1Char('/'))) {
        error(QNetworkReply::ContentOperationNotPermittedError,
              tr("Cannot open %1: is a directory").arg(url.toString()));
        finished();
        return;
    }
    state = LoggingIn;

    QNetworkAccessCache* cache = QNetworkAccessManagerPrivate::getCache(this);
    QByteArray cacheKey = makeCacheKey(url);
    if (!cache->requestEntry(cacheKey, this,
                             SLOT(ftpConnectionReady(QNetworkAccessCache::CacheableObject*)))) {
        ftp = new QNetworkAccessFtpFtp;
#ifndef QT_NO_NETWORKPROXY
        if (proxy.type() == QNetworkProxy::FtpCachingProxy)
            ftp->setProxy(proxy.hostName(), proxy.port());
#endif
        ftp->connectToHost(url.host(), url.port(DefaultFtpPort));
        ftp->login(url.userName(), url.password());

        cache->addEntry(cacheKey, ftp);
        ftpConnectionReady(ftp);
    }

    // Put operation
    if (operation() == QNetworkAccessManager::PutOperation) {
        uploadDevice = QNonContiguousByteDeviceFactory::wrap(createUploadByteDevice());
        uploadDevice->setParent(this);
    }
}

void QNetworkAccessFtpBackend::closeDownstreamChannel()
{
    state = Disconnecting;
    if (operation() == QNetworkAccessManager::GetOperation)
#ifndef Q_OS_WINCE
        abort();
#else
        exit(3);
#endif
}

bool QNetworkAccessFtpBackend::waitForDownstreamReadyRead(int ms)
{
    if (!ftp)
        return false;

    if (ftp->bytesAvailable()) {
        ftpReadyRead();
        return true;
    }

    if (ms == 0)
        return false;

    qCritical("QNetworkAccess: FTP backend does not support waitForReadyRead()");
    return false;
}

void QNetworkAccessFtpBackend::downstreamReadyWrite()
{
    if (state == Transferring && ftp && ftp->bytesAvailable())
        ftpReadyRead();
}

void QNetworkAccessFtpBackend::ftpConnectionReady(QNetworkAccessCache::CacheableObject *o)
{
    ftp = static_cast<QNetworkAccessFtpFtp *>(o);
    connect(ftp, SIGNAL(done(bool)), SLOT(ftpDone()));
    connect(ftp, SIGNAL(rawCommandReply(int,QString)), SLOT(ftpRawCommandReply(int,QString)));
    connect(ftp, SIGNAL(readyRead()), SLOT(ftpReadyRead()));

    // is the login process done already?
    if (ftp->state() == QFtp::LoggedIn)
        ftpDone();

    // no, defer the actual operation until after we've logged in
}

void QNetworkAccessFtpBackend::disconnectFromFtp()
{
    state = Disconnecting;

    if (ftp) {
        disconnect(ftp, 0, this, 0);

        QByteArray key = makeCacheKey(url());
        QNetworkAccessManagerPrivate::getCache(this)->releaseEntry(key);

        ftp = 0;
    }
}

void QNetworkAccessFtpBackend::ftpDone()
{
    // the last command we sent is done
    if (state == LoggingIn && ftp->state() != QFtp::LoggedIn) {
        if (ftp->state() == QFtp::Connected) {
            // the login did not succeed
            QUrl newUrl = url();
            newUrl.setUserInfo(QString());
            setUrl(newUrl);

            QAuthenticator auth;
            authenticationRequired(&auth);

            if (!auth.isNull()) {
                // try again:
                newUrl.setUserName(auth.user());
                ftp->login(auth.user(), auth.password());
                return;
            }

            error(QNetworkReply::AuthenticationRequiredError,
                  tr("Logging in to %1 failed: authentication required")
                  .arg(url().host()));
        } else {
            // we did not connect
            QNetworkReply::NetworkError code;
            switch (ftp->error()) {
            case QFtp::HostNotFound:
                code = QNetworkReply::HostNotFoundError;
                break;

            case QFtp::ConnectionRefused:
                code = QNetworkReply::ConnectionRefusedError;
                break;

            default:
                code = QNetworkReply::ProtocolFailure;
                break;
            }

            error(code, ftp->errorString());
        }

        // we're not connected, so remove the cache entry:
        QByteArray key = makeCacheKey(url());
        QNetworkAccessManagerPrivate::getCache(this)->removeEntry(key);

        disconnect(ftp, 0, this, 0);
        ftp->dispose();
        ftp = 0;

        state = Disconnecting;
        finished();
        return;
    }

    // check for errors:
    if (ftp->error() != QFtp::NoError) {
        QString msg;
        if (operation() == QNetworkAccessManager::GetOperation)
            msg = tr("Error while downloading %1: %2");
        else
            msg = tr("Error while uploading %1: %2");
        msg = msg.arg(url().toString(), ftp->errorString());

        if (state == Statting)
            // file probably doesn't exist
            error(QNetworkReply::ContentNotFoundError,  msg);
        else
            error(QNetworkReply::ContentAccessDenied, msg);

        disconnectFromFtp();
        finished();
    }

    if (state == LoggingIn) {
        state = CheckingFeatures;
        if (operation() == QNetworkAccessManager::GetOperation) {
            // send help command to find out if server supports "SIZE" and "MDTM"
            QString command = url().path();
            command.prepend(QLatin1String("%1 "));
            helpId = ftp->rawCommand(QLatin1String("HELP")); // get supported commands
        } else {
            ftpDone();
        }
    } else if (state == CheckingFeatures) {
        state = Statting;
        if (operation() == QNetworkAccessManager::GetOperation) {
            // logged in successfully, send the stat requests (if supported)
            QString command = url().path();
            command.prepend(QLatin1String("%1 "));
            if (supportsSize)
                sizeId = ftp->rawCommand(command.arg(QLatin1String("SIZE"))); // get size
            if (supportsMdtm)
                mdtmId = ftp->rawCommand(command.arg(QLatin1String("MDTM"))); // get modified time
            if (!supportsSize && !supportsMdtm)
                ftpDone();      // no commands sent, move to the next state
        } else {
            ftpDone();
        }
    } else if (state == Statting) {
        // statted successfully, send the actual request
        emit metaDataChanged();
        state = Transferring;

        QFtp::TransferType type = QFtp::Binary;
        if (operation() == QNetworkAccessManager::GetOperation) {
            setCachingEnabled(true);
            ftp->get(url().path(), 0, type);
        } else {
            ftp->put(uploadDevice, url().path(), type);
        }

    } else if (state == Transferring) {
        // upload or download finished
        disconnectFromFtp();
        finished();
    }
}

void QNetworkAccessFtpBackend::ftpReadyRead()
{
    writeDownstreamData(ftp->readAll());
}

void QNetworkAccessFtpBackend::ftpRawCommandReply(int code, const QString &text)
{
    //qDebug() << "FTP reply:" << code << text;
    int id = ftp->currentId();

    if ((id == helpId) && ((code == 200) || (code == 214))) {     // supported commands
        // the "FEAT" ftp command would be nice here, but it is not part of the
        // initial FTP RFC 959, neither ar "SIZE" nor "MDTM" (they are all specified
        // in RFC 3659)
        if (text.contains(QLatin1String("SIZE"), Qt::CaseSensitive))
            supportsSize = true;
        if (text.contains(QLatin1String("MDTM"), Qt::CaseSensitive))
            supportsMdtm = true;
    } else if (code == 213) {          // file status
        if (id == sizeId) {
            // reply to the size command
            setHeader(QNetworkRequest::ContentLengthHeader, text.toLongLong());
#ifndef QT_NO_DATESTRING
        } else if (id == mdtmId) {
            QDateTime dt = QDateTime::fromString(text, QLatin1String("yyyyMMddHHmmss"));
            setHeader(QNetworkRequest::LastModifiedHeader, dt);
#endif
        }
    }
}

QT_END_NAMESPACE

#endif // QT_NO_FTP