/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtNetwork module of the Qt Toolkit.
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** 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
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****************************************************************************/

#include "qnetworkaccessdatabackend_p.h"
#include "qnetworkrequest.h"
#include "qnetworkreply.h"
#include "qurlinfo.h"
#include "private/qdataurl_p.h"
#include <qcoreapplication.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
        const QString msg = QCoreApplication::translate("QNetworkAccessDataBackend",
                                                        "Operation not supported on %1")
                      .arg(uri.toString());
        error(QNetworkReply::ContentOperationNotPermittedError, msg);
        finished();
        return;
    }

    QPair<QString, QByteArray> decoded = qDecodeDataUrl(uri);

    if (! decoded.first.isNull()) {
        setHeader(QNetworkRequest::ContentTypeHeader, decoded.first);
        setHeader(QNetworkRequest::ContentLengthHeader, decoded.second.size());
        emit metaDataChanged();

        QByteDataBuffer list;
        list.append(decoded.second);
        decoded.second.clear(); // important because of implicit sharing!
        writeDownstreamData(list);

        finished();
        return;
    }

    // something wrong with this URI
    const QString msg = QCoreApplication::translate("QNetworkAccessDataBackend",
                                                    "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