| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtNetwork module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** GNU Lesser General Public License Usage |
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| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
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| ** |
| ** 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 |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| //#define QNETWORKACCESSCACHEBACKEND_DEBUG |
| |
| #include "qnetworkaccesscachebackend_p.h" |
| #include "qabstractnetworkcache.h" |
| #include "qfileinfo.h" |
| #if QT_CONFIG(ftp) |
| #include "qurlinfo_p.h" |
| #endif |
| #include "qdir.h" |
| #include "qcoreapplication.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| QNetworkAccessCacheBackend::QNetworkAccessCacheBackend() |
| : QNetworkAccessBackend() |
| { |
| } |
| |
| QNetworkAccessCacheBackend::~QNetworkAccessCacheBackend() |
| { |
| } |
| |
| void QNetworkAccessCacheBackend::open() |
| { |
| if (operation() != QNetworkAccessManager::GetOperation || !sendCacheContents()) { |
| QString msg = QCoreApplication::translate("QNetworkAccessCacheBackend", "Error opening %1") |
| .arg(this->url().toString()); |
| error(QNetworkReply::ContentNotFoundError, msg); |
| } else { |
| setAttribute(QNetworkRequest::SourceIsFromCacheAttribute, true); |
| } |
| finished(); |
| } |
| |
| bool QNetworkAccessCacheBackend::sendCacheContents() |
| { |
| setCachingEnabled(false); |
| QAbstractNetworkCache *nc = networkCache(); |
| if (!nc) |
| return false; |
| |
| QNetworkCacheMetaData item = nc->metaData(url()); |
| if (!item.isValid()) |
| return false; |
| |
| QNetworkCacheMetaData::AttributesMap attributes = item.attributes(); |
| setAttribute(QNetworkRequest::HttpStatusCodeAttribute, attributes.value(QNetworkRequest::HttpStatusCodeAttribute)); |
| setAttribute(QNetworkRequest::HttpReasonPhraseAttribute, attributes.value(QNetworkRequest::HttpReasonPhraseAttribute)); |
| |
| // set the raw headers |
| const QNetworkCacheMetaData::RawHeaderList rawHeaders = item.rawHeaders(); |
| for (const auto &header : rawHeaders) { |
| if (header.first.toLower() == "cache-control") { |
| const QByteArray cacheControlValue = header.second.toLower(); |
| if (cacheControlValue.contains("must-revalidate") |
| || cacheControlValue.contains("no-cache")) { |
| return false; |
| } |
| } |
| setRawHeader(header.first, header.second); |
| } |
| |
| // handle a possible redirect |
| QVariant redirectionTarget = attributes.value(QNetworkRequest::RedirectionTargetAttribute); |
| if (redirectionTarget.isValid()) { |
| setAttribute(QNetworkRequest::RedirectionTargetAttribute, redirectionTarget); |
| redirectionRequested(redirectionTarget.toUrl()); |
| } |
| |
| // signal we're open |
| metaDataChanged(); |
| |
| if (operation() == QNetworkAccessManager::GetOperation) { |
| QIODevice *contents = nc->data(url()); |
| if (!contents) |
| return false; |
| contents->setParent(this); |
| writeDownstreamData(contents); |
| } |
| |
| #if defined(QNETWORKACCESSCACHEBACKEND_DEBUG) |
| qDebug() << "Successfully sent cache:" << url(); |
| #endif |
| return true; |
| } |
| |
| bool QNetworkAccessCacheBackend::start() |
| { |
| open(); |
| return true; |
| } |
| |
| void QNetworkAccessCacheBackend::closeDownstreamChannel() |
| { |
| } |
| |
| void QNetworkAccessCacheBackend::closeUpstreamChannel() |
| { |
| Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!"); |
| } |
| |
| void QNetworkAccessCacheBackend::upstreamReadyRead() |
| { |
| Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!"); |
| } |
| |
| void QNetworkAccessCacheBackend::downstreamReadyWrite() |
| { |
| Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!"); |
| } |
| |
| QT_END_NAMESPACE |
| |