1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtNetwork module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qnetworkaccessdatabackend_p.h"

    43 #include "qnetworkrequest.h"

    44 #include "qnetworkreply.h"

    45 #include "qurlinfo.h"

    46 

    47 QT_BEGIN_NAMESPACE

    48 

    49 QNetworkAccessBackend *

    50 QNetworkAccessDataBackendFactory::create(QNetworkAccessManager::Operation,

    51                                          const QNetworkRequest &request) const

    52 {

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

    54         return new QNetworkAccessDataBackend;

    55 

    56     return 0;

    57 }

    58 

    59 QNetworkAccessDataBackend::QNetworkAccessDataBackend()

    60 {

    61 }

    62 

    63 QNetworkAccessDataBackend::~QNetworkAccessDataBackend()

    64 {

    65 }

    66 

    67 void QNetworkAccessDataBackend::open()

    68 {

    69     QUrl uri = request().url();

    70 

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

    72         operation() != QNetworkAccessManager::HeadOperation) {

    73         // data: doesn't support anything but GET

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

    75                       .arg(uri.toString());

    76         error(QNetworkReply::ContentOperationNotPermittedError, msg);

    77         finished();

    78         return;

    79     }

    80 

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

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

    83 

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

    85         // reality often differs from the specification. People have

    86         // data: URIs with ? and #

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

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

    89 

    90         // remove the data: scheme

    91         data.remove(0, 5);

    92 

    93         // parse it:

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

    95         if (pos != -1) {

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

    97             data.truncate(pos);

    98             data = data.trimmed();

    99 

   100             // find out if the payload is encoded in Base64

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

   102                 payload = QByteArray::fromBase64(payload);

   103                 data.chop(7);

   104             }

   105 

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

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

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

   109                     ++i;

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

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

   112             }

   113 

   114             if (!data.isEmpty())

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

   116 

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

   118             emit metaDataChanged();

   119 

   120             QByteDataBuffer list;

   121             list.append(payload);

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

   123             writeDownstreamData(list);

   124 

   125             finished();

   126             return;

   127         }

   128     }

   129 

   130     // something wrong with this URI

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

   132     error(QNetworkReply::ProtocolFailure, msg);

   133     finished();

   134 }

   135 

   136 void QNetworkAccessDataBackend::closeDownstreamChannel()

   137 {

   138 }

   139 

   140 void QNetworkAccessDataBackend::closeUpstreamChannel()

   141 {

   142 }

   143 

   144 bool QNetworkAccessDataBackend::waitForDownstreamReadyRead(int)

   145 {

   146     return false;

   147 }

   148 

   149 bool QNetworkAccessDataBackend::waitForUpstreamBytesWritten(int)

   150 {

   151     return false;

   152 }

   153 

   154 QT_END_NAMESPACE