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

**

** 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.

**

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** 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

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** $QT_END_LICENSE$

**

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

#include "qnetworkaccessdatabackend_p.h"

#include "qnetworkrequest.h"

#include "qnetworkreply.h"

#include "qurlinfo.h"

QT_BEGIN_NAMESPACE

QNetworkAccessBackend *

QNetworkAccessDataBackendFactory::create(QNetworkAccessManager::Operation,

                                         const QNetworkRequest &request) const

{

    if (request.url().scheme() == QLatin1String("data"))

        return new QNetworkAccessDataBackend;

    return 0;

}

QNetworkAccessDataBackend::QNetworkAccessDataBackend()

{

}

QNetworkAccessDataBackend::~QNetworkAccessDataBackend()

{

}

void QNetworkAccessDataBackend::open()

{

    QUrl uri = request().url();

    if (operation() != QNetworkAccessManager::GetOperation &&

        operation() != QNetworkAccessManager::HeadOperation) {

        // data: doesn't support anything but GET

        QString msg = QObject::tr("Operation not supported on %1")

                      .arg(uri.toString());

        error(QNetworkReply::ContentOperationNotPermittedError, msg);

        finished();

        return;

    }

    if (uri.host().isEmpty()) {

        setHeader(QNetworkRequest::ContentTypeHeader, QLatin1String("text/plain;charset=US-ASCII"));

        // the following would have been the correct thing, but

        // reality often differs from the specification. People have

        // data: URIs with ? and #

        //QByteArray data = QByteArray::fromPercentEncoding(uri.encodedPath());

        QByteArray data = QByteArray::fromPercentEncoding(uri.toEncoded());

        // remove the data: scheme

        data.remove(0, 5);

        // parse it:

        int pos = data.indexOf(',');

        if (pos != -1) {

            QByteArray payload = data.mid(pos + 1);

            data.truncate(pos);

            data = data.trimmed();

            // find out if the payload is encoded in Base64

            if (data.endsWith(";base64")) {

                payload = QByteArray::fromBase64(payload);

                data.chop(7);

            }

            if (data.toLower().startsWith("charset")) {

                int i = 7;      // strlen("charset")

                while (data.at(i) == ' ')

                    ++i;

                if (data.at(i) == '=')

                    data.prepend("text/plain;");

            }

            if (!data.isEmpty())

                setHeader(QNetworkRequest::ContentTypeHeader, data.trimmed());

            setHeader(QNetworkRequest::ContentLengthHeader, payload.size());

            emit metaDataChanged();

            QByteDataBuffer list;

            list.append(payload);

            payload.clear(); // important because of implicit sharing!

            writeDownstreamData(list);

            finished();

            return;

        }

    }

    // something wrong with this URI

    QString msg = QObject::tr("Invalid URI: %1").arg(uri.toString());

    error(QNetworkReply::ProtocolFailure, msg);

    finished();

}

void QNetworkAccessDataBackend::closeDownstreamChannel()

{

}

void QNetworkAccessDataBackend::closeUpstreamChannel()

{

}

bool QNetworkAccessDataBackend::waitForDownstreamReadyRead(int)

{

    return false;

}

bool QNetworkAccessDataBackend::waitForUpstreamBytesWritten(int)

{

    return false;

}

QT_END_NAMESPACE