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Branched from the monolithic repo, Qt master branch, at commit
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diff --git a/src/network/access/qnetworkaccessmanager.cpp b/src/network/access/qnetworkaccessmanager.cpp
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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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "QtNetwork/qnetworksession.h"
+#include "QtNetwork/private/qsharednetworksession_p.h"
+
+#include "qnetworkaccesshttpbackend_p.h"
+#include "qnetworkaccessftpbackend_p.h"
+#include "qnetworkaccessfilebackend_p.h"
+#include "qnetworkaccessdebugpipebackend_p.h"
+#include "qnetworkaccesscachebackend_p.h"
+#include "qnetworkreplydataimpl_p.h"
+#include "qnetworkreplyfileimpl_p.h"
+
+#include "QtCore/qbuffer.h"
+#include "QtCore/qurl.h"
+#include "QtCore/qvector.h"
+#include "QtNetwork/qauthenticator.h"
+#include "QtNetwork/qsslconfiguration.h"
+#include "QtNetwork/qnetworkconfigmanager.h"
+#include "QtNetwork/qhttpmultipart.h"
+#include "qhttpmultipart_p.h"
+
+#include "qthread.h"
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_HTTP
+Q_GLOBAL_STATIC(QNetworkAccessHttpBackendFactory, httpBackend)
+#endif // QT_NO_HTTP
+Q_GLOBAL_STATIC(QNetworkAccessFileBackendFactory, fileBackend)
+#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
+
+#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. One QNetworkAccessManager
+    should be enough for the whole Qt application.
+
+    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
+
+    QNetworkAccessManager has an asynchronous API.
+    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.
+
+    \note QNetworkAccessManager queues the requests it receives. The number
+    of requests executed in parallel is dependent on the protocol.
+    Currently, for the HTTP protocol on desktop platforms, 6 requests are
+    executed in parallel for one host/port combination.
+
+    A more involved example, assuming the manager is already existent,
+    can be:
+    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 1
+
+    \section1 Network and Roaming support
+
+    With the addition of the \l {Bearer Management} API to Qt 4.7
+    QNetworkAccessManager gained the ability to manage network connections.
+    QNetworkAccessManager can start the network interface if the device is
+    offline and terminates the interface if the current process is the last
+    one to use the uplink. Note that some platform utilize grace periods from
+    when the last application stops using a uplink until the system actually
+    terminates the connectivity link. Roaming is equally transparent. Any
+    queued/pending network requests are automatically transferred to new
+    access point.
+
+    Clients wanting to utilize this feature should not require any changes. In fact
+    it is likely that existing platform specific connection code can simply be
+    removed from the application.
+
+    \note The network and roaming support in QNetworkAccessManager is conditional
+    upon the platform supporting connection management. The
+    \l QNetworkConfigurationManager::NetworkSessionRequired can be used to
+    detect whether QNetworkAccessManager utilizes this feature. Currently only
+    Meego/Harmattan and Symbian platforms provide connection management support.
+
+    \note This feature cannot be used in combination with the Bearer Management
+    API as provided by QtMobility. Applications have to migrate to the Qt version
+    of Bearer Management.
+
+    \section1 Symbian Platform Security Requirements
+
+    On Symbian, processes which use this class must have the
+    \c NetworkServices platform security capability. If the client
+    process lacks this capability, operations will result in a panic.
+
+    Platform security capabilities are added via the
+    \l{qmake-variable-reference.html#target-capability}{TARGET.CAPABILITY}
+    qmake variable.
+
+    \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())
+
+    \value CustomOperation      custom operation (created with
+    sendCustomRequest())    \since 4.7
+
+    \omitvalue UnknownOperation
+
+    \sa QNetworkReply::operation()
+*/
+
+/*!
+    \enum QNetworkAccessManager::NetworkAccessibility
+
+    Indicates whether the network is accessible via this network access manager.
+
+    \value UnknownAccessibility     The network accessibility cannot be determined.
+    \value NotAccessible            The network is not currently accessible, either because there
+                                    is currently no network coverage or network access has been
+                                    explicitly disabled by a call to setNetworkAccessible().
+    \value Accessible               The network is accessible.
+
+    \sa networkAccessible
+*/
+
+/*!
+    \property QNetworkAccessManager::networkAccessible
+    \brief whether the network is currently accessible via this network access manager.
+
+    \since 4.7
+
+    If the network is \l {NotAccessible}{not accessible} the network access manager will not
+    process any new network requests, all such requests will fail with an error.  Requests with
+    URLs with the file:// scheme will still be processed.
+
+    By default the value of this property reflects the physical state of the device.  Applications
+    may override it to disable all network requests via this network access manager by calling
+
+    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 4
+
+    Network requests can be reenabled again by calling
+
+    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 5
+
+    \note Calling setNetworkAccessible() does not change the network state.
+*/
+
+/*!
+    \fn void QNetworkAccessManager::networkAccessibleChanged(QNetworkAccessManager::NetworkAccessibility accessible)
+
+    This signal is emitted when the value of the \l networkAccessible property changes.
+    \a accessible is the new network accessibility.
+*/
+
+/*!
+    \fn void QNetworkAccessManager::networkSessionConnected()
+
+    \since 4.7
+
+    \internal
+
+    This signal is emitted when the status of the network session changes into a usable (Connected)
+    state. It is used to signal to QNetworkReplys to start or migrate their network operation once
+    the network session has been opened or finished roaming.
+*/
+
+/*!
+    \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()
+*/
+
+
+/*!
+    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();
+
+    qRegisterMetaType<QNetworkReply::NetworkError>("QNetworkReply::NetworkError");
+}
+
+/*!
+    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
+
+    // Delete the QNetworkReply children first.
+    // Else a QAbstractNetworkCache might get deleted in ~QObject
+    // before a QNetworkReply that accesses the QAbstractNetworkCache
+    // object in its destructor.
+    qDeleteAll(findChildren<QNetworkReply *>());
+    // The other children will be deleted in this ~QObject
+    // FIXME instead of this "hack" make the QNetworkReplyImpl
+    // properly watch the cache deletion, e.g. via a QWeakPointer.
+}
+
+#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.
+
+    If \a cookieJar is in the same thread as this QNetworkAccessManager,
+    it will set the parent of the \a cookieJar
+    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
+    requirements (cookie domain matches the request's and cookie path
+    matches the request's). In order to implement your own security
+    policy, override the QNetworkCookieJar::cookiesForUrl() and
+    QNetworkCookieJar::setCookiesFromUrl() virtual functions. Those
+    functions are called by QNetworkAccessManager when it detects a
+    new cookie.
+
+    \sa cookieJar(), QNetworkCookieJar::cookiesForUrl(), QNetworkCookieJar::setCookiesFromUrl()
+*/
+void QNetworkAccessManager::setCookieJar(QNetworkCookieJar *cookieJar)
+{
+    Q_D(QNetworkAccessManager);
+    d->cookieJarCreated = true;
+    if (d->cookieJar != cookieJar) {
+        if (d->cookieJar && d->cookieJar->parent() == this)
+            delete d->cookieJar;
+        d->cookieJar = cookieJar;
+        if (thread() == cookieJar->thread())
+            d->cookieJar->setParent(this);
+    }
+}
+
+/*!
+    Posts a request to obtain the network headers for \a request
+    and returns a new QNetworkReply object which will contain such headers.
+
+    The function is named after the HTTP request associated (HEAD).
+*/
+QNetworkReply *QNetworkAccessManager::head(const QNetworkRequest &request)
+{
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::HeadOperation, request));
+}
+
+/*!
+    Posts a request to obtain the contents of the target \a request
+    and returns a new QNetworkReply object opened for reading which emits the 
+    \l{QIODevice::readyRead()}{readyRead()} signal whenever new data 
+    arrives.
+
+    The contents as well as associated headers will be downloaded.
+
+    \sa post(), put(), deleteResource(), sendCustomRequest()
+*/
+QNetworkReply *QNetworkAccessManager::get(const QNetworkRequest &request)
+{
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::GetOperation, request));
+}
+
+/*!
+    Sends an HTTP POST request to the destination specified by \a request
+    and returns a new QNetworkReply object opened for reading that will 
+    contain the reply sent by the server. The contents of  the \a data 
+    device will be uploaded to the server.
+
+    \a data must be open for reading and must remain valid until the 
+    finished() signal is emitted for this reply.
+
+    \note Sending a POST request on protocols other than HTTP and
+    HTTPS is undefined and will probably fail.
+
+    \sa get(), put(), deleteResource(), sendCustomRequest()
+*/
+QNetworkReply *QNetworkAccessManager::post(const QNetworkRequest &request, QIODevice *data)
+{
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::PostOperation, request, data));
+}
+
+/*!
+    \overload
+
+    Sends the contents of the \a data byte array to the destination 
+    specified by \a request.
+*/
+QNetworkReply *QNetworkAccessManager::post(const QNetworkRequest &request, const QByteArray &data)
+{
+    QBuffer *buffer = new QBuffer;
+    buffer->setData(data);
+    buffer->open(QIODevice::ReadOnly);
+
+    QNetworkReply *reply = post(request, buffer);
+    buffer->setParent(reply);
+    return reply;
+}
+
+/*!
+    \since 4.8
+
+    \overload
+
+    Sends the contents of the \a multiPart message to the destination
+    specified by \a request.
+
+    This can be used for sending MIME multipart messages over HTTP.
+
+    \sa QHttpMultiPart, QHttpPart, put()
+*/
+QNetworkReply *QNetworkAccessManager::post(const QNetworkRequest &request, QHttpMultiPart *multiPart)
+{
+    QNetworkRequest newRequest = d_func()->prepareMultipart(request, multiPart);
+    QIODevice *device = multiPart->d_func()->device;
+    QNetworkReply *reply = post(newRequest, device);
+    return reply;
+}
+
+/*!
+    \since 4.8
+
+    \overload
+
+    Sends the contents of the \a multiPart message to the destination
+    specified by \a request.
+
+    This can be used for sending MIME multipart messages over HTTP.
+
+    \sa QHttpMultiPart, QHttpPart, post()
+*/
+QNetworkReply *QNetworkAccessManager::put(const QNetworkRequest &request, QHttpMultiPart *multiPart)
+{
+    QNetworkRequest newRequest = d_func()->prepareMultipart(request, multiPart);
+    QIODevice *device = multiPart->d_func()->device;
+    QNetworkReply *reply = put(newRequest, device);
+    return reply;
+}
+
+/*!
+    Uploads the contents of \a data to the destination \a request and
+    returnes a new QNetworkReply object that will be open for reply.
+
+    \a data must be opened for reading when this function is called
+    and must remain valid until the finished() signal is emitted for
+    this reply.
+
+    Whether anything will be available for reading from the returned
+    object is protocol dependent. For HTTP, the server may send a 
+    small HTML page indicating the upload was successful (or not). 
+    Other protocols will probably have content in their replies.
+
+    \note For HTTP, this request will send a PUT request, which most servers
+    do not allow. Form upload mechanisms, including that of uploading
+    files through HTML forms, use the POST mechanism.
+
+    \sa get(), post(), deleteResource(), sendCustomRequest()
+*/
+QNetworkReply *QNetworkAccessManager::put(const QNetworkRequest &request, QIODevice *data)
+{
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::PutOperation, request, data));
+}
+
+/*!
+    \overload
+
+    Sends the contents of the \a data byte array to the destination
+    specified by \a request.
+*/
+QNetworkReply *QNetworkAccessManager::put(const QNetworkRequest &request, const QByteArray &data)
+{
+    QBuffer *buffer = new QBuffer;
+    buffer->setData(data);
+    buffer->open(QIODevice::ReadOnly);
+
+    QNetworkReply *reply = put(request, buffer);
+    buffer->setParent(reply);
+    return reply;
+}
+
+/*!
+    \since 4.6
+
+    Sends a request to delete the resource identified by the URL of \a request.
+
+    \note This feature is currently available for HTTP only, performing an 
+    HTTP DELETE request.
+
+    \sa get(), post(), put(), sendCustomRequest()
+*/
+QNetworkReply *QNetworkAccessManager::deleteResource(const QNetworkRequest &request)
+{
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::DeleteOperation, request));
+}
+
+#ifndef QT_NO_BEARERMANAGEMENT
+
+/*!
+    \since 4.7
+
+    Sets the network configuration that will be used when creating the
+    \l {QNetworkSession}{network session} to \a config.
+
+    The network configuration is used to create and open a network session before any request that
+    requires network access is process.  If no network configuration is explicitly set via this
+    function the network configuration returned by
+    QNetworkConfigurationManager::defaultConfiguration() will be used.
+
+    To restore the default network configuration set the network configuration to the value
+    returned from QNetworkConfigurationManager::defaultConfiguration().
+
+    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 2
+
+    If an invalid network configuration is set, a network session will not be created.  In this
+    case network requests will be processed regardless, but may fail.  For example:
+
+    \snippet doc/src/snippets/code/src_network_access_qnetworkaccessmanager.cpp 3
+
+    \sa configuration(), QNetworkSession
+*/
+void QNetworkAccessManager::setConfiguration(const QNetworkConfiguration &config)
+{
+    d_func()->createSession(config);
+}
+
+/*!
+    \since 4.7
+
+    Returns the network configuration that will be used to create the
+    \l {QNetworkSession}{network session} which will be used when processing network requests.
+
+    \sa setConfiguration(), activeConfiguration()
+*/
+QNetworkConfiguration QNetworkAccessManager::configuration() const
+{
+    Q_D(const QNetworkAccessManager);
+
+    if (d->networkSession)
+        return d->networkSession->configuration();
+    else
+        return QNetworkConfiguration();
+}
+
+/*!
+    \since 4.7
+
+    Returns the current active network configuration.
+
+    If the network configuration returned by configuration() is of type
+    QNetworkConfiguration::ServiceNetwork this function will return the current active child
+    network configuration of that configuration.  Otherwise returns the same network configuration
+    as configuration().
+
+    Use this function to return the actual network configuration currently in use by the network
+    session.
+
+    \sa configuration()
+*/
+QNetworkConfiguration QNetworkAccessManager::activeConfiguration() const
+{
+    Q_D(const QNetworkAccessManager);
+
+    if (d->networkSession) {
+        QNetworkConfigurationManager manager;
+
+        return manager.configurationFromIdentifier(
+            d->networkSession->sessionProperty(QLatin1String("ActiveConfiguration")).toString());
+    } else {
+        return QNetworkConfiguration();
+    }
+}
+
+/*!
+    \since 4.7
+
+    Overrides the reported network accessibility.  If \a accessible is NotAccessible the reported
+    network accessiblity will always be NotAccessible.  Otherwise the reported network
+    accessibility will reflect the actual device state.
+*/
+void QNetworkAccessManager::setNetworkAccessible(QNetworkAccessManager::NetworkAccessibility accessible)
+{
+    Q_D(QNetworkAccessManager);
+
+    if (d->networkAccessible != accessible) {
+        NetworkAccessibility previous = networkAccessible();
+        d->networkAccessible = accessible;
+        NetworkAccessibility current = networkAccessible();
+        if (previous != current)
+            emit networkAccessibleChanged(current);
+    }
+}
+
+/*!
+    \since 4.7
+
+    Returns the current network accessibility.
+*/
+QNetworkAccessManager::NetworkAccessibility QNetworkAccessManager::networkAccessible() const
+{
+    Q_D(const QNetworkAccessManager);
+
+    if (d->networkSession) {
+        // d->online holds online/offline state of this network session.
+        if (d->online)
+            return d->networkAccessible;
+        else
+            return NotAccessible;
+    } else {
+        // Network accessibility is either disabled or unknown.
+        return (d->networkAccessible == NotAccessible) ? NotAccessible : UnknownAccessibility;
+    }
+}
+
+#endif // QT_NO_BEARERMANAGEMENT
+
+/*!
+    \since 4.7
+
+    Sends a custom request to the server identified by the URL of \a request.
+
+    It is the user's responsibility to send a \a verb to the server that is valid
+    according to the HTTP specification.
+
+    This method provides means to send verbs other than the common ones provided
+    via get() or post() etc., for instance sending an HTTP OPTIONS command.
+
+    If \a data is not empty, the contents of the \a data
+    device will be uploaded to the server; in that case, data must be open for
+    reading and must remain valid until the finished() signal is emitted for this reply.
+
+    \note This feature is currently available for HTTP only.
+
+    \sa get(), post(), put(), deleteResource()
+*/
+QNetworkReply *QNetworkAccessManager::sendCustomRequest(const QNetworkRequest &request, const QByteArray &verb, QIODevice *data)
+{
+    QNetworkRequest newRequest(request);
+    newRequest.setAttribute(QNetworkRequest::CustomVerbAttribute, verb);
+    return d_func()->postProcess(createRequest(QNetworkAccessManager::CustomOperation, newRequest, data));
+}
+
+/*!
+    Returns a new QNetworkReply object to handle the operation \a op
+    and request \a req. The device \a outgoingData is always 0 for Get and
+    Head requests, but is the value passed to post() and put() in
+    those operations (the QByteArray variants will pass a QBuffer
+    object).
+
+    The default implementation calls QNetworkCookieJar::cookiesForUrl()
+    on the cookie jar set with setCookieJar() to obtain the cookies to
+    be sent to the remote server.
+
+    The returned object must be in an open state.
+*/
+QNetworkReply *QNetworkAccessManager::createRequest(QNetworkAccessManager::Operation op,
+                                                    const QNetworkRequest &req,
+                                                    QIODevice *outgoingData)
+{
+    Q_D(QNetworkAccessManager);
+
+    bool isLocalFile = req.url().isLocalFile();
+    QString scheme = req.url().scheme().toLower();
+
+    // fast path for GET on file:// URLs
+    // The QNetworkAccessFileBackend will right now only be used for PUT
+    if ((op == QNetworkAccessManager::GetOperation || op == QNetworkAccessManager::HeadOperation)
+        && (isLocalFile || scheme == QLatin1String("qrc"))) {
+        return new QNetworkReplyFileImpl(this, req, op);
+    }
+
+    if ((op == QNetworkAccessManager::GetOperation || op == QNetworkAccessManager::HeadOperation)
+            && scheme == QLatin1String("data")) {
+        return new QNetworkReplyDataImpl(this, req, op);
+    }
+
+    // A request with QNetworkRequest::AlwaysCache does not need any bearer management
+    QNetworkRequest::CacheLoadControl mode =
+        static_cast<QNetworkRequest::CacheLoadControl>(
+            req.attribute(QNetworkRequest::CacheLoadControlAttribute,
+                              QNetworkRequest::PreferNetwork).toInt());
+    if (mode == QNetworkRequest::AlwaysCache
+        && (op == QNetworkAccessManager::GetOperation
+        || op == QNetworkAccessManager::HeadOperation)) {
+        // FIXME Implement a QNetworkReplyCacheImpl instead, see QTBUG-15106
+        QNetworkReplyImpl *reply = new QNetworkReplyImpl(this);
+        QNetworkReplyImplPrivate *priv = reply->d_func();
+        priv->manager = this;
+        priv->backend = new QNetworkAccessCacheBackend();
+        priv->backend->manager = this->d_func();
+        priv->backend->setParent(reply);
+        priv->backend->reply = priv;
+        priv->setup(op, req, outgoingData);
+        return reply;
+    }
+
+#ifndef QT_NO_BEARERMANAGEMENT
+    // Return a disabled network reply if network access is disabled.
+    // Except if the scheme is empty or file://.
+    if (!d->networkAccessible && !isLocalFile) {
+        return new QDisabledNetworkReply(this, req, op);
+    }
+
+    if (!d->networkSession && (d->initializeSession || !d->networkConfiguration.isEmpty())) {
+        QNetworkConfigurationManager manager;
+        if (!d->networkConfiguration.isEmpty()) {
+            d->createSession(manager.configurationFromIdentifier(d->networkConfiguration));
+        } else {
+            if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired)
+                d->createSession(manager.defaultConfiguration());
+            else
+                d->initializeSession = false;
+        }
+    }
+
+    if (d->networkSession)
+        d->networkSession->setSessionProperty(QLatin1String("AutoCloseSessionTimeout"), -1);
+#endif
+
+    QNetworkRequest request = req;
+    if (!request.header(QNetworkRequest::ContentLengthHeader).isValid() &&
+        outgoingData && !outgoingData->isSequential()) {
+        // request has no Content-Length
+        // but the data that is outgoing is random-access
+        request.setHeader(QNetworkRequest::ContentLengthHeader, outgoingData->size());
+    }
+
+    if (static_cast<QNetworkRequest::LoadControl>
+        (request.attribute(QNetworkRequest::CookieLoadControlAttribute,
+                           QNetworkRequest::Automatic).toInt()) == QNetworkRequest::Automatic) {
+        if (d->cookieJar) {
+            QList<QNetworkCookie> cookies = d->cookieJar->cookiesForUrl(request.url());
+            if (!cookies.isEmpty())
+                request.setHeader(QNetworkRequest::CookieHeader, QVariant::fromValue(cookies));
+        }
+    }
+
+    // first step: create the reply
+    QUrl url = request.url();
+    QNetworkReplyImpl *reply = new QNetworkReplyImpl(this);
+#ifndef QT_NO_BEARERMANAGEMENT
+    if (!isLocalFile) {
+        connect(this, SIGNAL(networkSessionConnected()),
+                reply, SLOT(_q_networkSessionConnected()));
+    }
+#endif
+    QNetworkReplyImplPrivate *priv = reply->d_func();
+    priv->manager = this;
+
+    // second step: fetch cached credentials
+    // This is not done for the time being, we should use signal emissions to request
+    // the credentials from cache.
+
+    // third step: find a backend
+    priv->backend = d->findBackend(op, request);
+
+#ifndef QT_NO_NETWORKPROXY
+    QList<QNetworkProxy> proxyList = d->queryProxy(QNetworkProxyQuery(request.url()));
+    priv->proxyList = proxyList;
+#endif
+    if (priv->backend) {
+        priv->backend->setParent(reply);
+        priv->backend->reply = priv;
+    }
+
+#ifndef QT_NO_OPENSSL
+    reply->setSslConfiguration(request.sslConfiguration());
+#endif
+
+    // fourth step: setup the reply
+    priv->setup(op, request, outgoingData);
+
+    return reply;
+}
+
+void QNetworkAccessManagerPrivate::_q_replyFinished()
+{
+    Q_Q(QNetworkAccessManager);
+
+    QNetworkReply *reply = qobject_cast<QNetworkReply *>(q->sender());
+    if (reply)
+        emit q->finished(reply);
+
+#ifndef QT_NO_BEARERMANAGEMENT
+    if (networkSession && q->findChildren<QNetworkReply *>().count() == 1)
+        networkSession->setSessionProperty(QLatin1String("AutoCloseSessionTimeout"), 120000);
+#endif
+}
+
+void QNetworkAccessManagerPrivate::_q_replySslErrors(const QList<QSslError> &errors)
+{
+#ifndef QT_NO_OPENSSL
+    Q_Q(QNetworkAccessManager);
+    QNetworkReply *reply = qobject_cast<QNetworkReply *>(q->sender());
+    if (reply)
+        emit q->sslErrors(reply, errors);
+#else
+    Q_UNUSED(errors);
+#endif
+}
+
+QNetworkReply *QNetworkAccessManagerPrivate::postProcess(QNetworkReply *reply)
+{
+    Q_Q(QNetworkAccessManager);
+    QNetworkReplyPrivate::setManager(reply, q);
+    q->connect(reply, SIGNAL(finished()), SLOT(_q_replyFinished()));
+#ifndef QT_NO_OPENSSL
+    /* In case we're compiled without SSL support, we don't have this signal and we need to
+     * avoid getting a connection error. */
+    q->connect(reply, SIGNAL(sslErrors(QList<QSslError>)), SLOT(_q_replySslErrors(QList<QSslError>)));
+#endif
+
+    return reply;
+}
+
+void QNetworkAccessManagerPrivate::createCookieJar() const
+{
+    if (!cookieJarCreated) {
+        // keep the ugly hack in here
+        QNetworkAccessManagerPrivate *that = const_cast<QNetworkAccessManagerPrivate *>(this);
+        that->cookieJar = new QNetworkCookieJar(that->q_func());
+        that->cookieJarCreated = true;
+    }
+}
+
+void QNetworkAccessManagerPrivate::authenticationRequired(QNetworkAccessBackend *backend,
+                                                          QAuthenticator *authenticator)
+{
+    Q_Q(QNetworkAccessManager);
+
+    // FIXME: Add support for domains (i.e., the leading path)
+    QUrl url = backend->reply->url;
+
+    // don't try the cache for the same URL twice in a row
+    // being called twice for the same URL means the authentication failed
+    // also called when last URL is empty, e.g. on first call
+    if (backend->reply->urlForLastAuthentication.isEmpty()
+            || url != backend->reply->urlForLastAuthentication) {
+        QNetworkAuthenticationCredential cred = authenticationManager->fetchCachedCredentials(url, authenticator);
+        if (!cred.isNull()) {
+            authenticator->setUser(cred.user);
+            authenticator->setPassword(cred.password);
+            backend->reply->urlForLastAuthentication = url;
+            return;
+        }
+    }
+
+    // if we emit a signal here in synchronous mode, the user might spin
+    // an event loop, which might recurse and lead to problems
+    if (backend->isSynchronous())
+        return;
+
+    backend->reply->urlForLastAuthentication = url;
+    emit q->authenticationRequired(backend->reply->q_func(), authenticator);
+    authenticationManager->cacheCredentials(url, authenticator);
+}
+
+#ifndef QT_NO_NETWORKPROXY
+void QNetworkAccessManagerPrivate::proxyAuthenticationRequired(QNetworkAccessBackend *backend,
+                                                               const QNetworkProxy &proxy,
+                                                               QAuthenticator *authenticator)
+{
+    Q_Q(QNetworkAccessManager);
+    // ### FIXME Tracking of successful authentications
+    // This code is a bit broken right now for SOCKS authentication
+    // first request: proxyAuthenticationRequired gets emitted, credentials gets saved
+    // second request: (proxy != backend->reply->lastProxyAuthentication) does not evaluate to true,
+    //      proxyAuthenticationRequired gets emitted again
+    // possible solution: some tracking inside the authenticator
+    //      or a new function proxyAuthenticationSucceeded(true|false)
+    if (proxy != backend->reply->lastProxyAuthentication) {
+        QNetworkAuthenticationCredential cred = authenticationManager->fetchCachedProxyCredentials(proxy);
+        if (!cred.isNull()) {
+            authenticator->setUser(cred.user);
+            authenticator->setPassword(cred.password);
+            return;
+        }
+    }
+
+    // if we emit a signal here in synchronous mode, the user might spin
+    // an event loop, which might recurse and lead to problems
+    if (backend->isSynchronous())
+        return;
+
+    backend->reply->lastProxyAuthentication = proxy;
+    emit q->proxyAuthenticationRequired(proxy, authenticator);
+    authenticationManager->cacheProxyCredentials(proxy, authenticator);
+}
+
+QList<QNetworkProxy> QNetworkAccessManagerPrivate::queryProxy(const QNetworkProxyQuery &query)
+{
+    QList<QNetworkProxy> proxies;
+    if (proxyFactory) {
+        proxies = proxyFactory->queryProxy(query);
+        if (proxies.isEmpty()) {
+            qWarning("QNetworkAccessManager: factory %p has returned an empty result set",
+                     proxyFactory);
+            proxies << QNetworkProxy::NoProxy;
+        }
+    } else if (proxy.type() == QNetworkProxy::DefaultProxy) {
+        // no proxy set, query the application
+        return QNetworkProxyFactory::proxyForQuery(query);
+    } else {
+        proxies << proxy;
+    }
+
+    return proxies;
+}
+#endif
+
+void QNetworkAccessManagerPrivate::clearCache(QNetworkAccessManager *manager)
+{
+    manager->d_func()->objectCache.clear();
+    manager->d_func()->authenticationManager->clearCache();
+
+    if (manager->d_func()->httpThread) {
+        // The thread will deleteLater() itself from its finished() signal
+        manager->d_func()->httpThread->quit();
+        manager->d_func()->httpThread = 0;
+    }
+}
+
+QNetworkAccessManagerPrivate::~QNetworkAccessManagerPrivate()
+{
+    if (httpThread) {
+        // The thread will deleteLater() itself from its finished() signal
+        httpThread->quit();
+        httpThread = 0;
+    }
+}
+
+#ifndef QT_NO_BEARERMANAGEMENT
+void QNetworkAccessManagerPrivate::createSession(const QNetworkConfiguration &config)
+{
+    Q_Q(QNetworkAccessManager);
+
+    initializeSession = false;
+
+    QSharedPointer<QNetworkSession> newSession;
+    if (config.isValid())
+        newSession = QSharedNetworkSessionManager::getSession(config);
+
+    if (networkSession) {
+        //do nothing if new and old session are the same
+        if (networkSession == newSession)
+            return;
+        //disconnect from old session
+        QObject::disconnect(networkSession.data(), SIGNAL(opened()), q, SIGNAL(networkSessionConnected()));
+        QObject::disconnect(networkSession.data(), SIGNAL(closed()), q, SLOT(_q_networkSessionClosed()));
+        QObject::disconnect(networkSession.data(), SIGNAL(stateChanged(QNetworkSession::State)),
+            q, SLOT(_q_networkSessionStateChanged(QNetworkSession::State)));
+    }
+
+    //switch to new session (null if config was invalid)
+    networkSession = newSession;
+
+    if (!networkSession) {
+        online = false;
+
+        if (networkAccessible == QNetworkAccessManager::NotAccessible)
+            emit q->networkAccessibleChanged(QNetworkAccessManager::NotAccessible);
+        else
+            emit q->networkAccessibleChanged(QNetworkAccessManager::UnknownAccessibility);
+
+        return;
+    }
+
+    //connect to new session
+    QObject::connect(networkSession.data(), SIGNAL(opened()), q, SIGNAL(networkSessionConnected()), Qt::QueuedConnection);
+    //QueuedConnection is used to avoid deleting the networkSession inside its closed signal
+    QObject::connect(networkSession.data(), SIGNAL(closed()), q, SLOT(_q_networkSessionClosed()), Qt::QueuedConnection);
+    QObject::connect(networkSession.data(), SIGNAL(stateChanged(QNetworkSession::State)),
+                     q, SLOT(_q_networkSessionStateChanged(QNetworkSession::State)), Qt::QueuedConnection);
+
+    _q_networkSessionStateChanged(networkSession->state());
+}
+
+void QNetworkAccessManagerPrivate::_q_networkSessionClosed()
+{
+    Q_Q(QNetworkAccessManager);
+    if (networkSession) {
+        networkConfiguration = networkSession->configuration().identifier();
+
+        //disconnect from old session
+        QObject::disconnect(networkSession.data(), SIGNAL(opened()), q, SIGNAL(networkSessionConnected()));
+        QObject::disconnect(networkSession.data(), SIGNAL(closed()), q, SLOT(_q_networkSessionClosed()));
+        QObject::disconnect(networkSession.data(), SIGNAL(stateChanged(QNetworkSession::State)),
+            q, SLOT(_q_networkSessionStateChanged(QNetworkSession::State)));
+        networkSession.clear();
+    }
+}
+
+void QNetworkAccessManagerPrivate::_q_networkSessionStateChanged(QNetworkSession::State state)
+{
+    Q_Q(QNetworkAccessManager);
+
+    //Do not emit the networkSessionConnected signal here, except for roaming -> connected
+    //transition, otherwise it is emitted twice in a row when opening a connection.
+    if (state == QNetworkSession::Connected && lastSessionState == QNetworkSession::Roaming)
+        emit q->networkSessionConnected();
+    lastSessionState = state;
+
+    if (online) {
+        if (state != QNetworkSession::Connected && state != QNetworkSession::Roaming) {
+            online = false;
+            emit q->networkAccessibleChanged(QNetworkAccessManager::NotAccessible);
+        }
+    } else {
+        if (state == QNetworkSession::Connected || state == QNetworkSession::Roaming) {
+            online = true;
+            emit q->networkAccessibleChanged(networkAccessible);
+        }
+    }
+}
+#endif // QT_NO_BEARERMANAGEMENT
+
+QNetworkRequest QNetworkAccessManagerPrivate::prepareMultipart(const QNetworkRequest &request, QHttpMultiPart *multiPart)
+{
+    // copy the request, we probably need to add some headers
+    QNetworkRequest newRequest(request);
+
+    // add Content-Type header if not there already
+    if (!request.header(QNetworkRequest::ContentTypeHeader).isValid()) {
+        QByteArray contentType;
+        contentType.reserve(34 + multiPart->d_func()->boundary.count());
+        contentType += "multipart/";
+        switch (multiPart->d_func()->contentType) {
+        case QHttpMultiPart::RelatedType:
+            contentType += "related";
+            break;
+        case QHttpMultiPart::FormDataType:
+            contentType += "form-data";
+            break;
+        case QHttpMultiPart::AlternativeType:
+            contentType += "alternative";
+            break;
+        default:
+            contentType += "mixed";
+            break;
+        }
+        // putting the boundary into quotes, recommended in RFC 2046 section 5.1.1
+        contentType += "; boundary=\"" + multiPart->d_func()->boundary + "\"";
+        newRequest.setHeader(QNetworkRequest::ContentTypeHeader, QVariant(contentType));
+    }
+
+    // add MIME-Version header if not there already (we must include the header
+    // if the message conforms to RFC 2045, see section 4 of that RFC)
+    QByteArray mimeHeader("MIME-Version");
+    if (!request.hasRawHeader(mimeHeader))
+        newRequest.setRawHeader(mimeHeader, QByteArray("1.0"));
+
+    QIODevice *device = multiPart->d_func()->device;
+    if (!device->isReadable()) {
+        if (!device->isOpen()) {
+            if (!device->open(QIODevice::ReadOnly))
+                qWarning("could not open device for reading");
+        } else {
+            qWarning("device is not readable");
+        }
+    }
+
+    return newRequest;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qnetworkaccessmanager.cpp"