summaryrefslogtreecommitdiffstats
path: root/src/network/access/qnetworkcookie.cpp
blob: 12359607691527da0ba705217e7d888c816feb4d (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
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qnetworkcookie.h"
#include "qnetworkcookie_p.h"

#include "qnetworkrequest.h"
#include "qnetworkreply.h"
#include "QtCore/qbytearray.h"
#include "QtCore/qdebug.h"
#include "QtCore/qlist.h"
#include "QtCore/qlocale.h"
#include "QtCore/qstring.h"
#include "QtCore/qurl.h"
#include "private/qobject_p.h"

QT_BEGIN_NAMESPACE

/*!
    \class QNetworkCookie
    \since 4.4
    \brief The QNetworkCookie class holds one network cookie.

    Cookies are small bits of information that stateless protocols
    like HTTP use to maintain some persistent information across
    requests.

    A cookie is set by a remote server when it replies to a request
    and it expects the same cookie to be sent back when further
    requests are sent.

    QNetworkCookie holds one such cookie as received from the
    network. A cookie has a name and a value, but those are opaque to
    the application (that is, the information stored in them has no
    meaning to the application). A cookie has an associated path name
    and domain, which indicate when the cookie should be sent again to
    the server.

    A cookie can also have an expiration date, indicating its
    validity. If the expiration date is not present, the cookie is
    considered a "session cookie" and should be discarded when the
    application exits (or when its concept of session is over).

    QNetworkCookie provides a way of parsing a cookie from the HTTP
    header format using the QNetworkCookie::parseCookies()
    function. However, when received in a QNetworkReply, the cookie is
    already parsed.

    This class implements cookies as described by the
    \l{Netscape Cookie Specification}{initial cookie specification by
    Netscape}, which is somewhat similar to the \l{RFC 2109} specification,
    plus the \l{Mitigating Cross-site Scripting With HTTP-only Cookies}
    {"HttpOnly" extension}. The more recent \l{RFC 2965} specification
    (which uses the Set-Cookie2 header) is not supported.

    \sa QNetworkCookieJar, QNetworkRequest, QNetworkReply
*/

/*!
    Create a new QNetworkCookie object, initializing the cookie name
    to \a name and its value to \a value.

    A cookie is only valid if it has a name. However, the value is
    opaque to the application and being empty may have significance to
    the remote server.
*/
QNetworkCookie::QNetworkCookie(const QByteArray &name, const QByteArray &value)
    : d(new QNetworkCookiePrivate)
{
    qRegisterMetaType<QNetworkCookie>();
    qRegisterMetaType<QList<QNetworkCookie> >();

    d->name = name;
    d->value = value;
}

/*!
    Creates a new QNetworkCookie object by copying the contents of \a
    other.
*/
QNetworkCookie::QNetworkCookie(const QNetworkCookie &other)
    : d(other.d)
{
}

/*!
    Destroys this QNetworkCookie object.
*/
QNetworkCookie::~QNetworkCookie()
{
    // QSharedDataPointer auto deletes
    d = 0;
}

/*!
    Copies the contents of the QNetworkCookie object \a other to this
    object.
*/
QNetworkCookie &QNetworkCookie::operator=(const QNetworkCookie &other)
{
    d = other.d;
    return *this;
}

/*!
    \fn bool QNetworkCookie::operator!=(const QNetworkCookie &other) const

    Returns true if this cookie is not equal to \a other.

    \sa operator==()
*/

/*!
    Returns true if this cookie is equal to \a other. This function
    only returns true if all fields of the cookie are the same.

    However, in some contexts, two cookies of the same name could be
    considered equal.

    \sa operator!=()
*/
bool QNetworkCookie::operator==(const QNetworkCookie &other) const
{
    if (d == other.d)
        return true;
    return d->name == other.d->name &&
        d->value == other.d->value &&
        d->expirationDate == other.d->expirationDate &&
        d->domain == other.d->domain &&
        d->path == other.d->path &&
        d->secure == other.d->secure &&
        d->comment == other.d->comment;
}

/*!
    Returns true if the "secure" option was specified in the cookie
    string, false otherwise.

    Secure cookies may contain private information and should not be
    resent over unencrypted connections.

    \sa setSecure()
*/
bool QNetworkCookie::isSecure() const
{
    return d->secure;
}

/*!
    Sets the secure flag of this cookie to \a enable.

    Secure cookies may contain private information and should not be
    resent over unencrypted connections.

    \sa isSecure()
*/
void QNetworkCookie::setSecure(bool enable)
{
    d->secure = enable;
}

/*!
    \since 4.5

    Returns true if the "HttpOnly" flag is enabled for this cookie.

    A cookie that is "HttpOnly" is only set and retrieved by the
    network requests and replies; i.e., the HTTP protocol. It is not
    accessible from scripts running on browsers.

    \sa isSecure()
*/
bool QNetworkCookie::isHttpOnly() const
{
    return d->httpOnly;
}

/*!
    \since 4.5

    Sets this cookie's "HttpOnly" flag to \a enable.
*/
void QNetworkCookie::setHttpOnly(bool enable)
{
    d->httpOnly = enable;
}

/*!
    Returns true if this cookie is a session cookie. A session cookie
    is a cookie which has no expiration date, which means it should be
    discarded when the application's concept of session is over
    (usually, when the application exits).

    \sa expirationDate(), setExpirationDate()
*/
bool QNetworkCookie::isSessionCookie() const
{
    return !d->expirationDate.isValid();
}

/*!
    Returns the expiration date for this cookie. If this cookie is a
    session cookie, the QDateTime returned will not be valid. If the
    date is in the past, this cookie has already expired and should
    not be sent again back to a remote server.

    The expiration date corresponds to the parameters of the "expires"
    entry in the cookie string.

    \sa isSessionCookie(), setExpirationDate()
*/
QDateTime QNetworkCookie::expirationDate() const
{
    return d->expirationDate;
}

/*!
    Sets the expiration date of this cookie to \a date. Setting an
    invalid expiration date to this cookie will mean it's a session
    cookie.

    \sa isSessionCookie(), expirationDate()
*/
void QNetworkCookie::setExpirationDate(const QDateTime &date)
{
    d->expirationDate = date;
}

/*!
    Returns the domain this cookie is associated with. This
    corresponds to the "domain" field of the cookie string.

    Note that the domain here may start with a dot, which is not a
    valid hostname. However, it means this cookie matches all
    hostnames ending with that domain name.

    \sa setDomain()
*/
QString QNetworkCookie::domain() const
{
    return d->domain;
}

/*!
    Sets the domain associated with this cookie to be \a domain.

    \sa domain()
*/
void QNetworkCookie::setDomain(const QString &domain)
{
    d->domain = domain;
}

/*!
    Returns the path associated with this cookie. This corresponds to
    the "path" field of the cookie string.

    \sa setPath()
*/
QString QNetworkCookie::path() const
{
    return d->path;
}

/*!
    Sets the path associated with this cookie to be \a path.

    \sa path()
*/
void QNetworkCookie::setPath(const QString &path)
{
    d->path = path;
}

/*!
    Returns the name of this cookie. The only mandatory field of a
    cookie is its name, without which it is not considered valid.

    \sa setName(), value()
*/
QByteArray QNetworkCookie::name() const
{
    return d->name;
}

/*!
    Sets the name of this cookie to be \a cookieName. Note that
    setting a cookie name to an empty QByteArray will make this cookie
    invalid.

    \sa name(), value()
*/
void QNetworkCookie::setName(const QByteArray &cookieName)
{
    d->name = cookieName;
}

/*!
    Returns this cookies value, as specified in the cookie
    string. Note that a cookie is still valid if its value is empty.

    Cookie name-value pairs are considered opaque to the application:
    that is, their values don't mean anything.

    \sa setValue(), name()
*/
QByteArray QNetworkCookie::value() const
{
    return d->value;
}

/*!
    Sets the value of this cookie to be \a value.

    \sa value(), name()
*/
void QNetworkCookie::setValue(const QByteArray &value)
{
    d->value = value;
}

// ### move this to qnetworkcookie_p.h and share with qnetworkaccesshttpbackend
static QPair<QByteArray, QByteArray> nextField(const QByteArray &text, int &position)
{
    // format is one of:
    //    (1)  token
    //    (2)  token = token
    //    (3)  token = quoted-string
    int i;
    const int length = text.length();
    position = nextNonWhitespace(text, position);

    // parse the first part, before the equal sign
    for (i = position; i < length; ++i) {
        register char c = text.at(i);
        if (c == ';' || c == ',' || c == '=')
            break;
    }

    QByteArray first = text.mid(position, i - position).trimmed();
    position = i;

    if (first.isEmpty())
        return qMakePair(QByteArray(), QByteArray());
    if (i == length || text.at(i) != '=')
        // no equal sign, we found format (1)
        return qMakePair(first, QByteArray());

    QByteArray second;
    second.reserve(32);         // arbitrary but works for most cases

    i = nextNonWhitespace(text, position + 1);
    if (i < length && text.at(i) == '"') {
        // a quote, we found format (3), where:
        // quoted-string  = ( <"> *(qdtext | quoted-pair ) <"> )
        // qdtext         = <any TEXT except <">>
        // quoted-pair    = "\" CHAR
        ++i;
        while (i < length) {
            register char c = text.at(i);
            if (c == '"') {
                // end of quoted text
                break;
            } else if (c == '\\') {
                ++i;
                if (i >= length)
                    // broken line
                    return qMakePair(QByteArray(), QByteArray());
                c = text.at(i);
            }

            second += c;
            ++i;
        }

        for ( ; i < length; ++i) {
            register char c = text.at(i);
            if (c == ',' || c == ';')
                break;
        }
        position = i;
    } else {
        // no quote, we found format (2)
        position = i;
        for ( ; i < length; ++i) {
            register char c = text.at(i);
            if (c == ',' || c == ';' || isLWS(c))
                break;
        }

        second = text.mid(position, i - position).trimmed();
        position = i;
    }

    if (second.isNull())
        second.resize(0); // turns into empty-but-not-null
    return qMakePair(first, second);
}

/*!
    \enum QNetworkCookie::RawForm

    This enum is used with the toRawForm() function to declare which
    form of a cookie shall be returned.

    \value NameAndValueOnly     makes toRawForm() return only the
        "NAME=VALUE" part of the cookie, as suitable for sending back
        to a server in a client request's "Cookie:" header. Multiple
        cookies are separated by a semi-colon in the "Cookie:" header
        field.

    \value Full                 makes toRawForm() return the full
        cookie contents, as suitable for sending to a client in a
        server's "Set-Cookie:" header. Multiple cookies are separated
        by commas in a "Set-Cookie:" header.

    Note that only the Full form of the cookie can be parsed back into
    its original contents.

    \sa toRawForm(), parseCookies()
*/

/*!
    Returns the raw form of this QNetworkCookie. The QByteArray
    returned by this function is suitable for an HTTP header, either
    in a server response (the Set-Cookie header) or the client request
    (the Cookie header). You can choose from one of two formats, using
    \a form.

    \sa parseCookies()
*/
QByteArray QNetworkCookie::toRawForm(RawForm form) const
{
    QByteArray result;
    if (d->name.isEmpty())
        return result;          // not a valid cookie

    result = d->name;
    result += '=';
    if (d->value.contains(';') ||
        d->value.contains(',') ||
        d->value.contains(' ') ||
        d->value.contains('"')) {
        result += '"';

        QByteArray value = d->value;
        value.replace('"', "\\\"");
        result += value;

        result += '"';
    } else {
        result += d->value;
    }

    if (form == Full) {
        // same as above, but encoding everything back
        if (isSecure())
            result += "; secure";
        if (isHttpOnly())
            result += "; HttpOnly";
        if (!isSessionCookie()) {
            result += "; expires=";
            result += QLocale::c().toString(d->expirationDate.toUTC(),
                                            QLatin1String("ddd, dd-MMM-yyyy hh:mm:ss 'GMT")).toLatin1();
        }
        if (!d->domain.isEmpty()) {
            result += "; domain=";
            result += QUrl::toAce(d->domain);
        }
        if (!d->path.isEmpty()) {
            result += "; path=";
            result += QUrl::toPercentEncoding(d->path, "/");
        }
    }
    return result;
}

/*!
    Parses the cookie string \a cookieString as received from a server
    response in the "Set-Cookie:" header. If there's a parsing error,
    this function returns an empty list.

    Since the HTTP header can set more than one cookie at the same
    time, this function returns a QList<QNetworkCookie>, one for each
    cookie that is parsed.

    \sa toRawForm()
*/
QList<QNetworkCookie> QNetworkCookie::parseCookies(const QByteArray &cookieString)
{
    // According to http://wp.netscape.com/newsref/std/cookie_spec.html,<
    // the Set-Cookie response header is of the format:
    //
    //   Set-Cookie: NAME=VALUE; expires=DATE; path=PATH; domain=DOMAIN_NAME; secure
    //
    // where only the NAME=VALUE part is mandatory
    //
    // We do not support RFC 2965 Set-Cookie2-style cookies

    QList<QNetworkCookie> result;
    QDateTime now = QDateTime::currentDateTime().toUTC();

    int position = 0;
    const int length = cookieString.length();
    while (position < length) {
        QNetworkCookie cookie;

        // The first part is always the "NAME=VALUE" part
        QPair<QByteArray,QByteArray> field = nextField(cookieString, position);
        if (field.first.isEmpty() || field.second.isNull())
            // parsing error
            return QList<QNetworkCookie>();
        cookie.setName(field.first);
        cookie.setValue(field.second);

        position = nextNonWhitespace(cookieString, position);
        bool endOfCookie = false;
        while (!endOfCookie && position < length)
            switch (cookieString.at(position++)) {
            case ',':
                // end of the cookie
                endOfCookie = true;
                break;

            case ';':
                // new field in the cookie
                field = nextField(cookieString, position);
                field.first = field.first.toLower(); // everything but the NAME=VALUE is case-insensitive

                if (field.first == "expires") {
                    static const char dateFormats[] =
                        "d-MMM-yyyy hh:mm:ss\0"
                        "d MMM yyyy hh:mm:ss\0"
                        "d-MMM-yy hh:mm:ss\0"
                        "\0";

                    // expires is a special case because it contains a naked comma
                    // and naked spaces. The format is:
                    //   expires=ddd(d)?, dd-MMM-yyyy hh:mm:ss GMT
                    // but we also accept standard HTTP dates

                    // make sure we're at the comma
                    if (position >= length || cookieString.at(position) != ',')
                        // invalid cookie string
                        return QList<QNetworkCookie>();

                    ++position;
                    int end;
                    for (end = position; end < length; ++end)
                        if (cookieString.at(end) == ',' || cookieString.at(end) == ';')
                            break;

                    QByteArray datestring = cookieString.mid(position, end - position).trimmed();
                    position = end;
                    if (datestring.endsWith(" GMT") || datestring.endsWith(" UTC"))
                        datestring.chop(4);
                    else if (datestring.endsWith(" +0000"))
                        datestring.chop(6);

                    size_t i = 0;
                    int j = 0;
                    QLocale cLocale = QLocale::c();
                    QDateTime dt;
                    do {
                        QLatin1String df(dateFormats + i);
                        i += strlen(dateFormats + i) + 1;

#ifndef QT_NO_DATESTRING
                        dt = cLocale.toDateTime(QString::fromLatin1(datestring), df);

                        // some cookies are set with a two-digit year
                        // (although this is not allowed); this is interpreted as a year
                        // in the 20th century by QDateTime.
                        // Work around this case here (assuming 00-69 is 21st century,
                        //                                      70-99 is 20th century)
                        QDate date = dt.date();
                        if (j == 2 && date.year() >= 1900 && date.year() < 1970)
                            dt = dt.addYears(100);
                        if (date.year() >= 0 && date.year() < 100)
                            dt = dt.addYears(1900);
#endif
                        j++;
                    } while (!dt.isValid() && i <= sizeof dateFormats - 1);
                    if (!dt.isValid())
                        // invalid cookie string
                        return QList<QNetworkCookie>();

                    dt.setTimeSpec(Qt::UTC);
                    cookie.setExpirationDate(dt);
                } else if (field.first == "domain") {
                    QByteArray rawDomain = field.second;
                    QString maybeLeadingDot;
                    if (rawDomain.startsWith('.')) {
                        maybeLeadingDot = QLatin1Char('.');
                        rawDomain = rawDomain.mid(1);
                    }

                    QString normalizedDomain = QUrl::fromAce(QUrl::toAce(QString::fromUtf8(rawDomain)));
                    cookie.setDomain(maybeLeadingDot + normalizedDomain);
                } else if (field.first == "max-age") {
                    bool ok = false;
                    int secs = field.second.toInt(&ok);
                    if (!ok)
                        // invalid cookie string
                        return QList<QNetworkCookie>();
                    cookie.setExpirationDate(now.addSecs(secs));
                } else if (field.first == "path") {
                    QString path = QUrl::fromPercentEncoding(field.second);
                    cookie.setPath(path);
                } else if (field.first == "secure") {
                    cookie.setSecure(true);
                } else if (field.first == "httponly") {
                    cookie.setHttpOnly(true);
                } else if (field.first == "comment") {
                    //cookie.setComment(QString::fromUtf8(field.second));
                } else if (field.first == "version") {
                    if (field.second != "1") {
                        // oops, we don't know how to handle this cookie
                        cookie = QNetworkCookie();
                        endOfCookie = true;
                        continue;
                    }
                } else {
                    // got an unknown field in the cookie
                    // what do we do?
                }

                position = nextNonWhitespace(cookieString, position);
            }

        result += cookie;
    }

    return result;
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug s, const QNetworkCookie &cookie)
{
    s.nospace() << "QNetworkCookie(" << cookie.toRawForm(QNetworkCookie::Full) << ")";
    return s.space();
}
#endif



class QNetworkCookieJarPrivate: public QObjectPrivate
{
public:
    QList<QNetworkCookie> allCookies;

    Q_DECLARE_PUBLIC(QNetworkCookieJar)
};

/*!
    \class QNetworkCookieJar
    \brief The QNetworkCookieJar class implements a simple jar of QNetworkCookie objects
    \since 4.4

    Cookies are small bits of information that stateless protocols
    like HTTP use to maintain some persistent information across
    requests.

    A cookie is set by a remote server when it replies to a request
    and it expects the same cookie to be sent back when further
    requests are sent.

    The cookie jar is the object that holds all cookies set in
    previous requests. Web browsers save their cookie jars to disk in
    order to conserve permanent cookies across invocations of the
    application.

    QNetworkCookieJar does not implement permanent storage: it only
    keeps the cookies in memory. Once the QNetworkCookieJar object is
    deleted, all cookies it held will be discarded as well. If you
    want to save the cookies, you should derive from this class and
    implement the saving to disk to your own storage format.

    This class implements only the basic security recommended by the
    cookie specifications and does not implement any cookie acceptance
    policy (it accepts all cookies set by any requests). In order to
    override those rules, you should reimplement the
    cookiesForUrl() and setCookiesFromUrl() virtual
    functions. They are called by QNetworkReply and
    QNetworkAccessManager when they detect new cookies and when they
    require cookies.

    \sa QNetworkCookie, QNetworkAccessManager, QNetworkReply,
    QNetworkRequest, QNetworkAccessManager::setCookieJar()
*/

/*!
    Creates a QNetworkCookieJar object and sets the parent object to
    be \a parent.

    The cookie jar is initialized to empty.
*/
QNetworkCookieJar::QNetworkCookieJar(QObject *parent)
    : QObject(*new QNetworkCookieJarPrivate, parent)
{
}

/*!
    Destroys this cookie jar object and discards all cookies stored in
    it. Cookies are not saved to disk in the QNetworkCookieJar default
    implementation.

    If you need to save the cookies to disk, you have to derive from
    QNetworkCookieJar and save the cookies to disk yourself.
*/
QNetworkCookieJar::~QNetworkCookieJar()
{
}

/*!
    Returns all cookies stored in this cookie jar. This function is
    suitable for derived classes to save cookies to disk, as well as
    to implement cookie expiration and other policies.

    \sa setAllCookies(), cookiesForUrl()
*/
QList<QNetworkCookie> QNetworkCookieJar::allCookies() const
{
    return d_func()->allCookies;
}

/*!
    Sets the internal list of cookies held by this cookie jar to be \a
    cookieList. This function is suitable for derived classes to
    implement loading cookies from permanent storage, or their own
    cookie acceptance policies by reimplementing
    setCookiesFromUrl().

    \sa allCookies(), setCookiesFromUrl()
*/
void QNetworkCookieJar::setAllCookies(const QList<QNetworkCookie> &cookieList)
{
    Q_D(QNetworkCookieJar);
    d->allCookies = cookieList;
}

static inline bool isParentPath(QString path, QString reference)
{
    if (!path.endsWith(QLatin1Char('/')))
        path += QLatin1Char('/');
    if (!reference.endsWith(QLatin1Char('/')))
        reference += QLatin1Char('/');
    return path.startsWith(reference);
}

static inline bool isParentDomain(QString domain, QString reference)
{
    if (!reference.startsWith(QLatin1Char('.')))
        return domain == reference;

    return domain.endsWith(reference) || domain == reference.mid(1);
}

/*!
    Adds the cookies in the list \a cookieList to this cookie
    jar. Default values for path and domain are taken from the \a
    url object.

    Returns true if one or more cookes are set for url otherwise false.

    If a cookie already exists in the cookie jar, it will be
    overridden by those in \a cookieList.

    The default QNetworkCookieJar class implements only a very basic
    security policy (it makes sure that the cookies' domain and path
    match the reply's). To enhance the security policy with your own
    algorithms, override setCookiesFromUrl().

    Also, QNetworkCookieJar does not have a maximum cookie jar
    size. Reimplement this function to discard older cookies to create
    room for new ones.

    \sa cookiesForUrl(), QNetworkAccessManager::setCookieJar()
*/
bool QNetworkCookieJar::setCookiesFromUrl(const QList<QNetworkCookie> &cookieList,
                                          const QUrl &url)
{
    Q_D(QNetworkCookieJar);
    QString defaultDomain = url.host();
    QString pathAndFileName = url.path();
    QString defaultPath = pathAndFileName.left(pathAndFileName.lastIndexOf(QLatin1Char('/'))+1);
    if (defaultPath.isEmpty())
        defaultPath = QLatin1Char('/');

    int added = 0;
    QDateTime now = QDateTime::currentDateTime();
    foreach (QNetworkCookie cookie, cookieList) {
        bool isDeletion = !cookie.isSessionCookie() &&
                          cookie.expirationDate() < now;

        // validate the cookie & set the defaults if unset
        // (RFC 2965: "The request-URI MUST path-match the Path attribute of the cookie.")
        if (cookie.path().isEmpty())
            cookie.setPath(defaultPath);
        else if (!isParentPath(pathAndFileName, cookie.path()))
            continue;           // not accepted

        if (cookie.domain().isEmpty()) {
            cookie.setDomain(defaultDomain);
        } else {
            QString domain = cookie.domain();
            if (!(isParentDomain(domain, defaultDomain)
                || isParentDomain(defaultDomain, domain))) {
                    continue;           // not accepted
            }
        }

        QList<QNetworkCookie>::Iterator it = d->allCookies.begin(),
                                       end = d->allCookies.end();
        for ( ; it != end; ++it)
            // does this cookie already exist?
            if (cookie.name() == it->name() &&
                cookie.domain() == it->domain() &&
                cookie.path() == it->path()) {
                // found a match
                d->allCookies.erase(it);
                break;
            }

        // did not find a match
        if (!isDeletion) {
            d->allCookies += cookie;
            ++added;
        }
    }
    return (added > 0);
}

/*!
    Returns the cookies to be added to when a request is sent to
    \a url. This function is called by the default
    QNetworkAccessManager::createRequest(), which adds the
    cookies returned by this function to the request being sent.

    If more than one cookie with the same name is found, but with
    differing paths, the one with longer path is returned before the
    one with shorter path. In other words, this function returns
    cookies sorted by path length.

    The default QNetworkCookieJar class implements only a very basic
    security policy (it makes sure that the cookies' domain and path
    match the reply's). To enhance the security policy with your own
    algorithms, override cookiesForUrl().

    \sa setCookiesFromUrl(), QNetworkAccessManager::setCookieJar()
*/
QList<QNetworkCookie> QNetworkCookieJar::cookiesForUrl(const QUrl &url) const
{
//     \b Warning! This is only a dumb implementation!
//     It does NOT follow all of the recommendations from
//     http://wp.netscape.com/newsref/std/cookie_spec.html
//     It does not implement a very good cross-domain verification yet.

    Q_D(const QNetworkCookieJar);
    QDateTime now = QDateTime::currentDateTime();
    QList<QNetworkCookie> result;

    // scan our cookies for something that matches
    QList<QNetworkCookie>::ConstIterator it = d->allCookies.constBegin(),
                                        end = d->allCookies.constEnd();
    for ( ; it != end; ++it) {
        if (!isParentDomain(url.host(), it->domain()))
            continue;
        if (!isParentPath(url.path(), it->path()))
            continue;
        if (!(*it).isSessionCookie() && (*it).expirationDate() < now)
            continue;

        // insert this cookie into result, sorted by path
        QList<QNetworkCookie>::Iterator insertIt = result.begin();
        while (insertIt != result.end()) {
            if (insertIt->path().length() < it->path().length()) {
                // insert here
                insertIt = result.insert(insertIt, *it);
                break;
            } else {
                ++insertIt;
            }
        }

        // this is the shortest path yet, just append
        if (insertIt == result.end())
            result += *it;
    }

    return result;
}

QT_END_NAMESPACE