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

**

** 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 "qnetworkreply.h"

#include "qnetworkreply_p.h"

#include <QtNetwork/qsslconfiguration.h>

QT_BEGIN_NAMESPACE

QNetworkReplyPrivate::QNetworkReplyPrivate()

    : readBufferMaxSize(0),

      operation(QNetworkAccessManager::UnknownOperation),

      errorCode(QNetworkReply::NoError)

{

    // set the default attribute values

    attributes.insert(QNetworkRequest::ConnectionEncryptedAttribute, false);

}

/*!

    \class QNetworkReply

    \since 4.4

    \brief The QNetworkReply class contains the data and headers for a request

    sent with QNetworkAccessManager

    \reentrant

    \ingroup network

    \inmodule QtNetwork

    The QNetworkReply class contains the data and meta data related to

    a request posted with QNetworkAccessManager. Like QNetworkRequest,

    it contains a URL and headers (both in parsed and raw form), some

    information about the reply's state and the contents of the reply

    itself.

    QNetworkReply is a sequential-access QIODevice, which means that

    once data is read from the object, it no longer kept by the

    device. It is therefore the application's responsibility to keep

    this data if it needs to. Whenever more data is received from the

    network and processed, the readyRead() signal is emitted.

    The downloadProgress() signal is also emitted when data is

    received, but the number of bytes contained in it may not

    represent the actual bytes received, if any transformation is done

    to the contents (for example, decompressing and removing the

    protocol overhead).

    Even though QNetworkReply is a QIODevice connected to the contents

    of the reply, it also emits the uploadProgress() signal, which

    indicates the progress of the upload for operations that have such

    content.

    \note Do not delete the object in the slot connected to the

    error() or finished() signal. Use deleteLater().

    \sa QNetworkRequest, QNetworkAccessManager

*/

/*!

    \enum QNetworkReply::NetworkError

    Indicates all possible error conditions found during the

    processing of the request.

    \value NoError              no error condition.

    \note When the HTTP protocol returns a redirect no error will be

    reported.  You can check if there is a redirect with the

    QNetworkRequest::RedirectionTargetAttribute attribute.

    \value ConnectionRefusedError  the remote server refused the

    connection (the server is not accepting requests)

    \value RemoteHostClosedError   the remote server closed the

    connection prematurely, before the entire reply was received and

    processed

    \value HostNotFoundError       the remote host name was not found

    (invalid hostname)

    \value TimeoutError            the connection to the remote server

    timed out

    \value OperationCanceledError  the operation was canceled via calls

    to abort() or close() before it was finished.

    \value SslHandshakeFailedError the SSL/TLS handshake failed and the

    encrypted channel could not be established. The sslErrors() signal

    should have been emitted.

    \value ProxyConnectionRefusedError the connection to the proxy

    server was refused (the proxy server is not accepting requests)

    \value ProxyConnectionClosedError  the proxy server closed the

    connection prematurely, before the entire reply was received and

    processed

    \value ProxyNotFoundError          the proxy host name was not

    found (invalid proxy hostname)

    \value ProxyTimeoutError           the connection to the proxy

    timed out or the proxy did not reply in time to the request sent

    \value ProxyAuthenticationRequiredError the proxy requires

    authentication in order to honour the request but did not accept

    any credentials offered (if any)

    \value ContentAccessDenied          the access to the remote

    content was denied (similar to HTTP error 401)

    \value ContentOperationNotPermittedError the operation requested

    on the remote content is not permitted

    \value ContentNotFoundError         the remote content was not

    found at the server (similar to HTTP error 404)

    \value AuthenticationRequiredError  the remote server requires

    authentication to serve the content but the credentials provided

    were not accepted (if any)

    \value ContentReSendError          the request needed to be sent

    again, but this failed for example because the upload data

    could not be read a second time.

    \value ProtocolUnknownError         the Network Access API cannot

    honor the request because the protocol is not known

    \value ProtocolInvalidOperationError the requested operation is

    invalid for this protocol

    \value UnknownNetworkError          an unknown network-related

    error was detected

    \value UnknownProxyError            an unknown proxy-related error

    was detected

    \value UnknownContentError          an unknown error related to

    the remote content was detected

    \value ProtocolFailure              a breakdown in protocol was

    detected (parsing error, invalid or unexpected responses, etc.)

    \sa error()

*/

/*!

    \fn void QNetworkReply::sslErrors(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.

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

    should proceed, the 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(), QNetworkAccessManager::sslErrors(),

    sslConfiguration(), ignoreSslErrors()

*/

/*!

    \fn void QNetworkReply::metaDataChanged()

    \omit FIXME: Update name? \endomit

    This signal is emitted whenever the metadata in this reply

    changes. metadata is any information that is not the content

    (data) itself, including the network headers. In the majority of

    cases, the metadata will be known fully by the time the first

    byte of data is received. However, it is possible to receive

    updates of headers or other metadata during the processing of the

    data.

    \sa header(), rawHeaderList(), rawHeader(), hasRawHeader()

*/

/*!

    \fn void QNetworkReply::finished()

    This signal is emitted when the reply has finished

    processing. After this signal is emitted, there will be no more

    updates to the reply's data or metadata.

    Unless close() has been called, the reply will be still be opened

    for reading, so the data can be retrieved by calls to read() or

    readAll(). In particular, if no calls to read() were made as a

    result of readyRead(), a call to readAll() will retrieve the full

    contents in a QByteArray.

    This signal is emitted in tandem with

    QNetworkAccessManager::finished() where that signal's reply

    parameter is this object.

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

    signal. Use deleteLater().

    You can also use isFinished() to check if a QNetworkReply

    has finished even before you receive the finished() signal.

    \sa QNetworkAccessManager::finished(), isFinished()

*/

/*!

    \fn void QNetworkReply::error(QNetworkReply::NetworkError code)

    This signal is emitted when the reply detects an error in

    processing. The finished() signal will probably follow, indicating

    that the connection is over.

    The \a code parameter contains the code of the error that was

    detected. Call errorString() to obtain a textual representation of

    the error condition.

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

    signal. Use deleteLater().

    \sa error(), errorString()

*/

/*!

    \fn void QNetworkReply::uploadProgress(qint64 bytesSent, qint64 bytesTotal)

    This signal is emitted to indicate the progress of the upload part

    of this network request, if there's any. If there's no upload

    associated with this request, this signal will not be emitted.

    The \a bytesSent

    parameter indicates the number of bytes uploaded, while \a

    bytesTotal indicates the total number of bytes to be uploaded. If

    the number of bytes to be uploaded could not be determined, \a

    bytesTotal will be -1.

    The upload is finished when \a bytesSent is equal to \a

    bytesTotal. At that time, \a bytesTotal will not be -1.

    This signal is suitable to connecting to QProgressBar::setValue()

    to update the QProgressBar that provides user feedback.

    \sa downloadProgress()

*/

/*!

    \fn void QNetworkReply::downloadProgress(qint64 bytesReceived, qint64 bytesTotal)

    This signal is emitted to indicate the progress of the download

    part of this network request, if there's any. If there's no

    download associated with this request, this signal will be emitted

    once with 0 as the value of both \a bytesReceived and \a

    bytesTotal.

    The \a bytesReceived parameter indicates the number of bytes

    received, while \a bytesTotal indicates the total number of bytes

    expected to be downloaded. If the number of bytes to be downloaded

    is not known, \a bytesTotal will be -1.

    The download is finished when \a bytesReceived is equal to \a

    bytesTotal. At that time, \a bytesTotal will not be -1.

    This signal is suitable to connecting to QProgressBar::setValue()

    to update the QProgressBar that provides user feedback.

    Note that the values of both \a bytesReceived and \a bytesTotal

    may be different from size(), the total number of bytes

    obtained through read() or readAll(), or the value of the

    header(ContentLengthHeader). The reason for that is that there may

    be protocol overhead or the data may be compressed during the

    download.

    \sa uploadProgress(), bytesAvailable()

*/

/*!

    \fn void QNetworkReply::abort()

    Aborts the operation immediately and close down any network

    connections still open. Uploads still in progress are also

    aborted.

    \sa close()

*/

/*!

    Creates a QNetworkReply object with parent \a parent.

    You cannot directly instantiate QNetworkReply objects. Use

    QNetworkAccessManager functions to do that.

*/

QNetworkReply::QNetworkReply(QObject *parent)

    : QIODevice(*new QNetworkReplyPrivate, parent)

{

}

/*!

    \internal

*/

QNetworkReply::QNetworkReply(QNetworkReplyPrivate &dd, QObject *parent)

    : QIODevice(dd, parent)

{

}

/*!

    Disposes of this reply and frees any resources associated with

    it. If any network connections are still open, they will be

    closed.

    \sa abort(), close()

*/

QNetworkReply::~QNetworkReply()

{

}

/*!

    Closes this device for reading. Unread data is discarded, but the

    network resources are not discarded until they are finished. In

    particular, if any upload is in progress, it will continue until

    it is done.

    The finished() signal is emitted when all operations are over and

    the network resources are freed.

    \sa abort(), finished()

*/

void QNetworkReply::close()

{

    QIODevice::close();

}

/*!

    \internal

*/

bool QNetworkReply::isSequential() const

{

    return true;

}

/*!

    Returns the size of the read buffer, in bytes.

    \sa setReadBufferSize()

*/

qint64 QNetworkReply::readBufferSize() const

{

    return d_func()->readBufferMaxSize;

}

/*!

    Sets the size of the read buffer to be \a size bytes. The read

    buffer is the buffer that holds data that is being downloaded off

    the network, before it is read with QIODevice::read(). Setting the

    buffer size to 0 will make the buffer unlimited in size.

    QNetworkReply will try to stop reading from the network once this

    buffer is full (i.e., bytesAvailable() returns \a size or more),

    thus causing the download to throttle down as well. If the buffer

    is not limited in size, QNetworkReply will try to download as fast

    as possible from the network.

    Unlike QAbstractSocket::setReadBufferSize(), QNetworkReply cannot

    guarantee precision in the read buffer size. That is,

    bytesAvailable() can return more than \a size.

    \sa readBufferSize()

*/

void QNetworkReply::setReadBufferSize(qint64 size)

{

    Q_D(QNetworkReply);

    d->readBufferMaxSize = size;

}

/*!

    Returns the QNetworkAccessManager that was used to create this

    QNetworkReply object. Initially, it is also the parent object.

*/

QNetworkAccessManager *QNetworkReply::manager() const

{

    return d_func()->manager;

}

/*!

    Returns the request that was posted for this reply. In special,

    note that the URL for the request may be different than that of

    the reply.

    \sa QNetworkRequest::url(), url(), setRequest()

*/

QNetworkRequest QNetworkReply::request() const

{

    return d_func()->request;

}

/*!

    Returns the operation that was posted for this reply.

    \sa setOperation()

*/

QNetworkAccessManager::Operation QNetworkReply::operation() const

{

    return d_func()->operation;

}

/*!

    Returns the error that was found during the processing of this

    request. If no error was found, returns NoError.

    \sa setError()

*/

QNetworkReply::NetworkError QNetworkReply::error() const

{

    return d_func()->errorCode;

}

/*!

    \since 4.6

    Returns true when the reply has finished or was aborted.

    \sa isRunning()

*/

bool QNetworkReply::isFinished() const

{

    return d_func()->isFinished();

}

/*!

    \since 4.6

    Returns true when the request is still processing and the

    reply has not finished or was aborted yet.

    \sa isFinished()

*/

bool QNetworkReply::isRunning() const

{

    return !isFinished();

}

/*!

    Returns the URL of the content downloaded or uploaded. Note that

    the URL may be different from that of the original request.

    \sa request(), setUrl(), QNetworkRequest::url()

*/

QUrl QNetworkReply::url() const

{

    return d_func()->url;

}

/*!

    Returns the value of the known header \a header, if that header

    was sent by the remote server. If the header was not sent, returns

    an invalid QVariant.

    \sa rawHeader(), setHeader(), QNetworkRequest::header()

*/

QVariant QNetworkReply::header(QNetworkRequest::KnownHeaders header) const

{

    return d_func()->cookedHeaders.value(header);

}

/*!

    Returns true if the raw header of name \a headerName was sent by

    the remote server

    \sa rawHeader()

*/

bool QNetworkReply::hasRawHeader(const QByteArray &headerName) const

{

    Q_D(const QNetworkReply);

    return d->findRawHeader(headerName) != d->rawHeaders.constEnd();

}

/*!

    Returns the raw contents of the header \a headerName as sent by

    the remote server. If there is no such header, returns an empty

    byte array, which may be indistinguishable from an empty

    header. Use hasRawHeader() to verify if the server sent such

    header field.

    \sa setRawHeader(), hasRawHeader(), header()

*/

QByteArray QNetworkReply::rawHeader(const QByteArray &headerName) const

{

    Q_D(const QNetworkReply);

    QNetworkHeadersPrivate::RawHeadersList::ConstIterator it =