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 **

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    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 //#define QNETWORKACCESSCACHEBACKEND_DEBUG

    43 

    44 #include "qnetworkaccesscachebackend_p.h"

    45 #include "qabstractnetworkcache.h"

    46 #include "qfileinfo.h"

    47 #include "qurlinfo.h"

    48 #include "qdir.h"

    49 #include "qcoreapplication.h"

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 QNetworkAccessCacheBackend::QNetworkAccessCacheBackend()

    54     : QNetworkAccessBackend()

    55     , device(0)

    56 {

    57 }

    58 

    59 QNetworkAccessCacheBackend::~QNetworkAccessCacheBackend()

    60 {

    61 }

    62 

    63 void QNetworkAccessCacheBackend::open()

    64 {

    65     if (operation() != QNetworkAccessManager::GetOperation || !sendCacheContents()) {

    66         QString msg = QCoreApplication::translate("QNetworkAccessCacheBackend", "Error opening %1")

    67                                                 .arg(this->url().toString());

    68         error(QNetworkReply::ContentNotFoundError, msg);

    69         setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true);

    70     }

    71     finished();

    72 }

    73 

    74 bool QNetworkAccessCacheBackend::sendCacheContents()

    75 {

    76     setCachingEnabled(false);

    77     QAbstractNetworkCache *nc = networkCache();

    78     if (!nc)

    79         return false;

    80 

    81     QNetworkCacheMetaData item = nc->metaData(url());

    82     if (!item.isValid())

    83         return false;

    84 

    85     QNetworkCacheMetaData::AttributesMap attributes = item.attributes();

    86     setAttribute(QNetworkRequest::HttpStatusCodeAttribute, attributes.value(QNetworkRequest::HttpStatusCodeAttribute));

    87     setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, attributes.value(QNetworkRequest::HttpReasonPhraseAttribute));

    88     setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true);

    89 

    90     // set the raw headers

    91     QNetworkCacheMetaData::RawHeaderList rawHeaders = item.rawHeaders();

    92     QNetworkCacheMetaData::RawHeaderList::ConstIterator it = rawHeaders.constBegin(),

    93                                                        end = rawHeaders.constEnd();

    94     for ( ; it != end; ++it)

    95         setRawHeader(it->first, it->second);

    96 

    97     // handle a possible redirect

    98     QVariant redirectionTarget = attributes.value(QNetworkRequest::RedirectionTargetAttribute);

    99     if (redirectionTarget.isValid()) {

   100         setAttribute(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget);

   101         redirectionRequested(redirectionTarget.toUrl());

   102     }

   103 

   104     // signal we're open

   105     metaDataChanged();

   106 

   107     if (operation() == QNetworkAccessManager::GetOperation) {

   108         QIODevice *contents = nc->data(url());

   109         if (!contents)

   110             return false;

   111         contents->setParent(this);

   112         writeDownstreamData(contents);

   113     }

   114 

   115 #if defined(QNETWORKACCESSCACHEBACKEND_DEBUG)

   116     qDebug() << "Successfully sent cache:" << url();

   117 #endif

   118     return true;

   119 }

   120 

   121 void QNetworkAccessCacheBackend::closeDownstreamChannel()

   122 {

   123     if (operation() == QNetworkAccessManager::GetOperation) {

   124         device->close();

   125         delete device;

   126         device = 0;

   127     }

   128 }

   129 

   130 void QNetworkAccessCacheBackend::closeUpstreamChannel()

   131 {

   132     Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");

   133 }

   134 

   135 bool QNetworkAccessCacheBackend::waitForDownstreamReadyRead(int)

   136 {

   137     Q_ASSERT_X(false, Q_FUNC_INFO , "This function show not have been called!");

   138     return false;

   139 }

   140 

   141 bool QNetworkAccessCacheBackend::waitForUpstreamBytesWritten(int)

   142 {

   143     Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");

   144     return false;

   145 }

   146 

   147 void QNetworkAccessCacheBackend::upstreamReadyRead()

   148 {

   149     Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");

   150 }

   151 

   152 void QNetworkAccessCacheBackend::downstreamReadyWrite()

   153 {

   154     Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");

   155 }

   156 

   157 QT_END_NAMESPACE

   158