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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qnetworkcookiejar.h"
#include "qnetworkcookiejar_p.h"
#include "QtNetwork/qnetworkcookie.h"
#include "QtCore/qurl.h"
#include "QtCore/qdatetime.h"
#include "private/qtldurl_p.h"
QT_BEGIN_NAMESPACE
/*!
\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 cookies are set for \a 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
if (cookie.path().isEmpty())
cookie.setPath(defaultPath);
// don't do path checking. See http://bugreports.qt.nokia.com/browse/QTBUG-5815
// else if (!isParentPath(pathAndFileName, cookie.path())) {
// continue; // not accepted
// }
if (cookie.domain().isEmpty()) {
cookie.setDomain(defaultDomain);
} else {
// Ensure the domain starts with a dot if its field was not empty
// in the HTTP header. There are some servers that forget the
// leading dot and this is actually forbidden according to RFC 2109,
// but all browsers accept it anyway so we do that as well.
if (!cookie.domain().startsWith(QLatin1Char('.')))
cookie.setDomain(QLatin1Char('.') + cookie.domain());
QString domain = cookie.domain();
if (!(isParentDomain(domain, defaultDomain)
|| isParentDomain(defaultDomain, domain)))
continue; // not accepted
// the check for effective TLDs makes the "embedded dot" rule from RFC 2109 section 4.3.2
// redundant; the "leading dot" rule has been relaxed anyway, see above
// we remove the leading dot for this check
if (qIsEffectiveTLD(domain.remove(0, 1)))
continue; // not accepted
}
for (int i = 0; i < d->allCookies.size(); ++i) {
// does this cookie already exist?
const QNetworkCookie ¤t = d->allCookies.at(i);
if (cookie.name() == current.name() &&
cookie.domain() == current.domain() &&
cookie.path() == current.path()) {
// found a match
d->allCookies.removeAt(i);
break;
}
}
// did not find a match
if (!isDeletion) {
int countForDomain = 0;
for (int i = d->allCookies.size() - 1; i >= 0; --i) {
// Start from the end and delete the oldest cookies to keep a maximum count of 50.
const QNetworkCookie ¤t = d->allCookies.at(i);
if (isParentDomain(cookie.domain(), current.domain())
|| isParentDomain(current.domain(), cookie.domain())) {
if (countForDomain >= 49)
d->allCookies.removeAt(i);
else
++countForDomain;
}
}
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 decreasingly 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;
bool isEncrypted = url.scheme().toLower() == QLatin1String("https");
// 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;
if ((*it).isSecure() && !isEncrypted)
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
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