/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtNetwork module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #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 \since 4.4 \inmodule QtNetwork \brief The QNetworkCookieJar class implements a simple jar of QNetworkCookie objects 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 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 &cookieList) { Q_D(QNetworkCookieJar); d->allCookies = cookieList; } static inline bool isParentPath(const QString &path, const QString &reference) { if (path.startsWith(reference)) { //The cookie-path and the request-path are identical. if (path.length() == reference.length()) return true; //The cookie-path is a prefix of the request-path, and the last //character of the cookie-path is %x2F ("/"). if (reference.endsWith('/')) return true; //The cookie-path is a prefix of the request-path, and the first //character of the request-path that is not included in the cookie- //path is a %x2F ("/") character. if (path.at(reference.length()) == '/') return true; } return false; } static inline bool isParentDomain(const QString &domain, const QString &reference) { if (!reference.startsWith(QLatin1Char('.'))) return domain == reference; return domain.endsWith(reference) || domain == reference.midRef(1); } /*! Adds the cookies in the list \a cookieList to this cookie jar. Before being inserted cookies are normalized. Returns \c 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(), QNetworkCookie::normalize() */ bool QNetworkCookieJar::setCookiesFromUrl(const QList &cookieList, const QUrl &url) { bool added = false; for (QNetworkCookie cookie : cookieList) { cookie.normalize(url); if (validateCookie(cookie, url) && insertCookie(cookie)) added = true; } return added; } /*! 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 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); const QDateTime now = QDateTime::currentDateTimeUtc(); QList result; bool isEncrypted = url.scheme() == QLatin1String("https"); // scan our cookies for something that matches QList::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::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; } /*! \since 5.0 Adds \a cookie to this cookie jar. Returns \c true if \a cookie was added, false otherwise. If a cookie with the same identifier already exists in the cookie jar, it will be overridden. */ bool QNetworkCookieJar::insertCookie(const QNetworkCookie &cookie) { Q_D(QNetworkCookieJar); const QDateTime now = QDateTime::currentDateTimeUtc(); bool isDeletion = !cookie.isSessionCookie() && cookie.expirationDate() < now; deleteCookie(cookie); if (!isDeletion) { d->allCookies += cookie; return true; } return false; } /*! \since 5.0 If a cookie with the same identifier as \a cookie exists in this cookie jar it will be updated. This function uses insertCookie(). Returns \c true if \a cookie was updated, false if no cookie in the jar matches the identifier of \a cookie. \sa QNetworkCookie::hasSameIdentifier() */ bool QNetworkCookieJar::updateCookie(const QNetworkCookie &cookie) { if (deleteCookie(cookie)) return insertCookie(cookie); return false; } /*! \since 5.0 Deletes from cookie jar the cookie found to have the same identifier as \a cookie. Returns \c true if a cookie was deleted, false otherwise. \sa QNetworkCookie::hasSameIdentifier() */ bool QNetworkCookieJar::deleteCookie(const QNetworkCookie &cookie) { Q_D(QNetworkCookieJar); QList::Iterator it; for (it = d->allCookies.begin(); it != d->allCookies.end(); ++it) { if (it->hasSameIdentifier(cookie)) { d->allCookies.erase(it); return true; } } return false; } /*! \since 5.0 Returns \c true if the domain and path of \a cookie are valid, false otherwise. The \a url parameter is used to determine if the domain specified in the cookie is allowed. */ bool QNetworkCookieJar::validateCookie(const QNetworkCookie &cookie, const QUrl &url) const { QString domain = cookie.domain(); const QString host = url.host(); if (!isParentDomain(domain, host) && !isParentDomain(host, domain)) return false; // 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 QNetworkCookie::normalize() // we remove the leading dot for this check if it's present if (qIsEffectiveTLD(domain.startsWith('.') ? domain.remove(0, 1) : domain)) return false; // not accepted return true; } QT_END_NAMESPACE