/****************************************************************************

**

** Copyright (C) 2010 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.

**

** $QT_BEGIN_LICENSE:LGPL$

** 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 Technology Preview License Agreement accompanying

** this package.

**

** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qnetworkaccessmanager.h"

#include "qnetworkaccessmanager_p.h"

#include "qnetworkrequest.h"

#include "qnetworkreply.h"

#include "qnetworkreply_p.h"

#include "qnetworkcookie.h"

#include "qabstractnetworkcache.h"

#include "qnetworkaccesshttpbackend_p.h"

#include "qnetworkaccessftpbackend_p.h"

#include "qnetworkaccessfilebackend_p.h"

#include "qnetworkaccessdatabackend_p.h"

#include "qnetworkaccessdebugpipebackend_p.h"

#include "qfilenetworkreply_p.h"

#include "QtCore/qbuffer.h"

#include "QtCore/qurl.h"

#include "QtCore/qvector.h"

#include "QtNetwork/qauthenticator.h"

#include "QtNetwork/qsslconfiguration.h"

QT_BEGIN_NAMESPACE

#ifndef QT_NO_HTTP

Q_GLOBAL_STATIC(QNetworkAccessHttpBackendFactory, httpBackend)

#endif // QT_NO_HTTP

Q_GLOBAL_STATIC(QNetworkAccessFileBackendFactory, fileBackend)

Q_GLOBAL_STATIC(QNetworkAccessDataBackendFactory, dataBackend)

#ifndef QT_NO_FTP

Q_GLOBAL_STATIC(QNetworkAccessFtpBackendFactory, ftpBackend)

#endif // QT_NO_FTP

#ifdef QT_BUILD_INTERNAL

Q_GLOBAL_STATIC(QNetworkAccessDebugPipeBackendFactory, debugpipeBackend)

#endif

static void ensureInitialized()

{

#ifndef QT_NO_HTTP

    (void) httpBackend();

#endif // QT_NO_HTTP

    (void) dataBackend();

#ifndef QT_NO_FTP

    (void) ftpBackend();

#endif

#ifdef QT_BUILD_INTERNAL

    (void) debugpipeBackend();

#endif

    // leave this one last since it will query the special QAbstractFileEngines

    (void) fileBackend();

}

/*!

    \class QNetworkAccessManager

    \brief The QNetworkAccessManager class allows the application to

    send network requests and receive replies

    \since 4.4

    \ingroup network

    \inmodule QtNetwork

    \reentrant

    The Network Access API is constructed around one QNetworkAccessManager

    object, which holds the common configuration and settings for the requests

    it sends. It contains the proxy and cache configuration, as well as the

    signals related to such issues, and reply signals that can be used to

    monitor the progress of a network operation.

    Once a QNetworkAccessManager object has been created, the application can

    use it to send requests over the network. A group of standard functions

    are supplied that take a request and optional data, and each return a

    QNetworkReply object. The returned object is used to obtain any data

    returned in response to the corresponding request.

    A simple download off the network could be accomplished with:

    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 0

    When the \tt replyFinished slot above is called, the parameter it

    takes is the QNetworkReply object containing the downloaded data

    as well as meta-data (headers, etc.).

    \note After the request has finished, it is the responsibility of the user

    to delete the QNetworkReply object at an appropriate time. Do not directly

    delete it inside the slot connected to finished(). You can use the

    deleteLater() function.

    A more involved example, assuming the manager is already existent,

    can be:

    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 1

    \sa QNetworkRequest, QNetworkReply, QNetworkProxy

*/

/*!

    \enum QNetworkAccessManager::Operation

    Indicates the operation this reply is processing.

    \value HeadOperation        retrieve headers operation (created

    with head())

    \value GetOperation         retrieve headers and download contents

    (created with get())

    \value PutOperation         upload contents operation (created

    with put())

    \value PostOperation        send the contents of an HTML form for

    processing via HTTP POST (created with post())

    \value DeleteOperation      delete contents operation (created with

    deleteResource())

    \omitvalue UnknownOperation

    \sa QNetworkReply::operation()

*/

/*!

    \fn void QNetworkAccessManager::proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *authenticator)

    This signal is emitted whenever a proxy requests authentication

    and QNetworkAccessManager cannot find a valid, cached

    credential. The slot connected to this signal should fill in the

    credentials for the proxy \a proxy in the \a authenticator object.

    QNetworkAccessManager will cache the credentials internally. The

    next time the proxy requests authentication, QNetworkAccessManager

    will automatically send the same credential without emitting the

    proxyAuthenticationRequired signal again.

    If the proxy rejects the credentials, QNetworkAccessManager will

    emit the signal again.

    \sa proxy(), setProxy(), authenticationRequired()

*/

/*!

    \fn void QNetworkAccessManager::authenticationRequired(QNetworkReply *reply, QAuthenticator *authenticator)

    This signal is emitted whenever a final server requests

    authentication before it delivers the requested contents. The slot

    connected to this signal should fill the credentials for the

    contents (which can be determined by inspecting the \a reply

    object) in the \a authenticator object.

    QNetworkAccessManager will cache the credentials internally and

    will send the same values if the server requires authentication

    again, without emitting the authenticationRequired() signal. If it

    rejects the credentials, this signal will be emitted again.

    \sa proxyAuthenticationRequired()

*/

/*!

    \fn void QNetworkAccessManager::finished(QNetworkReply *reply)

    This signal is emitted whenever a pending network reply is

    finished. The \a reply parameter will contain a pointer to the

    reply that has just finished. This signal is emitted in tandem

    with the QNetworkReply::finished() signal.

    See QNetworkReply::finished() for information on the status that

    the object will be in.

    \note Do not delete the \a reply object in the slot connected to this

    signal. Use deleteLater().

    \sa QNetworkReply::finished(), QNetworkReply::error()

*/

/*!

    \fn void QNetworkAccessManager::sslErrors(QNetworkReply *reply, const QList<QSslError> &errors)

    This signal is emitted if the SSL/TLS session encountered errors

    during the set up, including certificate verification errors. The

    \a errors parameter contains the list of errors and \a reply is

    the QNetworkReply that is encountering these errors.

    To indicate that the errors are not fatal and that the connection

    should proceed, the QNetworkReply::ignoreSslErrors() function should be called

    from the slot connected to this signal. If it is not called, the

    SSL session will be torn down before any data is exchanged

    (including the URL).

    This signal can be used to display an error message to the user

    indicating that security may be compromised and display the

    SSL settings (see sslConfiguration() to obtain it). If the user

    decides to proceed after analyzing the remote certificate, the

    slot should call ignoreSslErrors().

    \sa QSslSocket::sslErrors(), QNetworkReply::sslErrors(),

    QNetworkReply::sslConfiguration(), QNetworkReply::ignoreSslErrors()

*/

class QNetworkAuthenticationCredential

{

public:

    QString domain;

    QString user;

    QString password;

};

Q_DECLARE_TYPEINFO(QNetworkAuthenticationCredential, Q_MOVABLE_TYPE);

inline bool operator<(const QNetworkAuthenticationCredential &t1, const QString &t2)

{ return t1.domain < t2; }

class QNetworkAuthenticationCache: private QVector<QNetworkAuthenticationCredential>,

                                   public QNetworkAccessCache::CacheableObject

{

public:

    QNetworkAuthenticationCache()

    {

        setExpires(false);

        setShareable(true);

        reserve(1);

    }

    QNetworkAuthenticationCredential *findClosestMatch(const QString &domain)

    {

        iterator it = qLowerBound(begin(), end(), domain);

        if (it == end() && !isEmpty())

            --it;

        if (it == end() || !domain.startsWith(it->domain))

            return 0;

        return &*it;

    }

    void insert(const QString &domain, const QString &user, const QString &password)

    {

        QNetworkAuthenticationCredential *closestMatch = findClosestMatch(domain);

        if (closestMatch && closestMatch->domain == domain) {

            // we're overriding the current credentials

            closestMatch->user = user;

            closestMatch->password = password;

        } else {

            QNetworkAuthenticationCredential newCredential;

            newCredential.domain = domain;

            newCredential.user = user;

            newCredential.password = password;

            if (closestMatch)

                QVector<QNetworkAuthenticationCredential>::insert(++closestMatch, newCredential);

            else

                QVector<QNetworkAuthenticationCredential>::insert(end(), newCredential);

        }

    }

    virtual void dispose() { delete this; }

};

#ifndef QT_NO_NETWORKPROXY

static QByteArray proxyAuthenticationKey(const QNetworkProxy &proxy, const QString &realm)

{

    QUrl key;

    switch (proxy.type()) {

    case QNetworkProxy::Socks5Proxy:

        key.setScheme(QLatin1String("proxy-socks5"));

        break;

    case QNetworkProxy::HttpProxy:

    case QNetworkProxy::HttpCachingProxy:

        key.setScheme(QLatin1String("proxy-http"));

        break;

    case QNetworkProxy::FtpCachingProxy:

        key.setScheme(QLatin1String("proxy-ftp"));

        break;

    case QNetworkProxy::DefaultProxy:

    case QNetworkProxy::NoProxy:

        // shouldn't happen

        return QByteArray();

        // no default:

        // let there be errors if a new proxy type is added in the future

    }

    if (key.scheme().isEmpty())

        // proxy type not handled

        return QByteArray();

    key.setUserName(proxy.user());

    key.setHost(proxy.hostName());

    key.setPort(proxy.port());

    key.setFragment(realm);

    return "auth:" + key.toEncoded();

}

#endif

static inline QByteArray authenticationKey(const QUrl &url, const QString &realm)

{

    QUrl copy = url;

    copy.setFragment(realm);

    return "auth:" + copy.toEncoded(QUrl::RemovePassword | QUrl::RemovePath | QUrl::RemoveQuery);

}

/*!

    Constructs a QNetworkAccessManager object that is the center of

    the Network Access API and sets \a parent as the parent object.

*/

QNetworkAccessManager::QNetworkAccessManager(QObject *parent)

    : QObject(*new QNetworkAccessManagerPrivate, parent)

{

    ensureInitialized();

}

/*!

    Destroys the QNetworkAccessManager object and frees up any

    resources. Note that QNetworkReply objects that are returned from

    this class have this object set as their parents, which means that

    they will be deleted along with it if you don't call

    QObject::setParent() on them.

*/

QNetworkAccessManager::~QNetworkAccessManager()

{

#ifndef QT_NO_NETWORKPROXY

    delete d_func()->proxyFactory;

#endif

}

#ifndef QT_NO_NETWORKPROXY

/*!

    Returns the QNetworkProxy that the requests sent using this

    QNetworkAccessManager object will use. The default value for the

    proxy is QNetworkProxy::DefaultProxy.

    \sa setProxy(), setProxyFactory(), proxyAuthenticationRequired()

*/

QNetworkProxy QNetworkAccessManager::proxy() const

{

    return d_func()->proxy;

}

/*!

    Sets the proxy to be used in future requests to be \a proxy. This

    does not affect requests that have already been sent. The

    proxyAuthenticationRequired() signal will be emitted if the proxy

    requests authentication.

    A proxy set with this function will be used for all requests

    issued by QNetworkAccessManager. In some cases, it might be

    necessary to select different proxies depending on the type of

    request being sent or the destination host. If that's the case,

    you should consider using setProxyFactory().

    \sa proxy(), proxyAuthenticationRequired()

*/

void QNetworkAccessManager::setProxy(const QNetworkProxy &proxy)

{

    Q_D(QNetworkAccessManager);

    delete d->proxyFactory;

    d->proxy = proxy;

    d->proxyFactory = 0;

}

/*!

    \fn QNetworkProxyFactory *QNetworkAccessManager::proxyFactory() const

    \since 4.5

    Returns the proxy factory that this QNetworkAccessManager object

    is using to determine the proxies to be used for requests.

    Note that the pointer returned by this function is managed by

    QNetworkAccessManager and could be deleted at any time.

    \sa setProxyFactory(), proxy()

*/

QNetworkProxyFactory *QNetworkAccessManager::proxyFactory() const

{

    return d_func()->proxyFactory;

}

/*!

    \since 4.5

    Sets the proxy factory for this class to be \a factory. A proxy

    factory is used to determine a more specific list of proxies to be

    used for a given request, instead of trying to use the same proxy

    value for all requests.

    All queries sent by QNetworkAccessManager will have type

    QNetworkProxyQuery::UrlRequest.

    For example, a proxy factory could apply the following rules:

    \list

      \o if the target address is in the local network (for example,

         if the hostname contains no dots or if it's an IP address in

         the organization's range), return QNetworkProxy::NoProxy

      \o if the request is FTP, return an FTP proxy

      \o if the request is HTTP or HTTPS, then return an HTTP proxy

      \o otherwise, return a SOCKSv5 proxy server

    \endlist

    The lifetime of the object \a factory will be managed by

    QNetworkAccessManager. It will delete the object when necessary.

    \note If a specific proxy is set with setProxy(), the factory will not

    be used.

    \sa proxyFactory(), setProxy(), QNetworkProxyQuery

*/

void QNetworkAccessManager::setProxyFactory(QNetworkProxyFactory *factory)

{

    Q_D(QNetworkAccessManager);

    delete d->proxyFactory;

    d->proxyFactory = factory;

    d->proxy = QNetworkProxy();

}

#endif

/*!

    \since 4.5

    Returns the cache that is used to store data obtained from the network.

    \sa setCache()

*/

QAbstractNetworkCache *QNetworkAccessManager::cache() const

{

    Q_D(const QNetworkAccessManager);

    return d->networkCache;

}

/*!

    \since 4.5

    Sets the manager's network cache to be the \a cache specified. The cache

    is used for all requests dispatched by the manager.

    Use this function to set the network cache object to a class that implements

    additional features, like saving the cookies to permanent storage.

    \note QNetworkAccessManager takes ownership of the \a cache object.

    QNetworkAccessManager by default does not have a set cache.

    Qt provides a simple disk cache, QNetworkDiskCache, which can be used.

    \sa cache(), QNetworkRequest::CacheLoadControl

*/

void QNetworkAccessManager::setCache(QAbstractNetworkCache *cache)

{

    Q_D(QNetworkAccessManager);

    if (d->networkCache != cache) {

        delete d->networkCache;

        d->networkCache = cache;

        if (d->networkCache)

            d->networkCache->setParent(this);

    }

}

/*!

    Returns the QNetworkCookieJar that is used to store cookies

    obtained from the network as well as cookies that are about to be

    sent.

    \sa setCookieJar()

*/

QNetworkCookieJar *QNetworkAccessManager::cookieJar() const

{

    Q_D(const QNetworkAccessManager);

    if (!d->cookieJar)

        d->createCookieJar();

    return d->cookieJar;

}

/*!

    Sets the manager's cookie jar to be the \a cookieJar specified.

    The cookie jar is used by all requests dispatched by the manager.

    Use this function to set the cookie jar object to a class that

    implements additional features, like saving the cookies to permanent

    storage.

    \note QNetworkAccessManager takes ownership of the \a cookieJar object.

    QNetworkAccessManager will set the parent of the \a cookieJar

    passed to itself, so that the cookie jar is deleted when this

    object is deleted as well. If you want to share cookie jars

    between different QNetworkAccessManager objects, you may want to

    set the cookie jar's parent to 0 after calling this function.

    QNetworkAccessManager by default does not implement any cookie

    policy of its own: it accepts all cookies sent by the server, as

    long as they are well formed and meet the minimum security