qdataurl.cpp

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
 
#include "qplatformdefs.h"
#include "qurl.h"
#include "private/qdataurl_p.h"
 
QT_BEGIN_NAMESPACE
 
Q_CORE_EXPORT bool qDecodeDataUrl(const QUrl &uri, QString &mimeType, QByteArray &payload)
{
    if (uri.scheme() != QLatin1String("data") || !uri.host().isEmpty())
        return false;
 
    mimeType = QStringLiteral("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.path(QUrl::FullyEncoded).toLatin1());
    QByteArray data = QByteArray::fromPercentEncoding(uri.url(QUrl::FullyEncoded | QUrl::RemoveScheme).toLatin1());
 
    // parse it:
    int pos = data.indexOf(',');
    if (pos != -1) {
        payload = data.mid(pos + 1);
        data.truncate(pos);
        data = data.trimmed();
 
        // find out if the payload is encoded in Base64
        if (QLatin1String{data}.endsWith(QLatin1String(";base64"), Qt::CaseInsensitive)) {
            payload = QByteArray::fromBase64(payload);
            data.chop(7);
        }
 
        if (QLatin1String{data}.startsWith(QLatin1String("charset"), Qt::CaseInsensitive)) {
            int i = 7;      // strlen("charset")
            while (data.at(i) == ' ')
                ++i;
            if (data.at(i) == '=')
                data.prepend("text/plain;");
        }
 
        if (!data.isEmpty())
            mimeType = QString::fromLatin1(data.trimmed());
 
    }
 
    return true;
}
 
QT_END_NAMESPACE