| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | //#define QNETWORKACCESSCACHEBACKEND_DEBUG |
| 5 | |
| 6 | #include "qnetworkaccesscachebackend_p.h" |
| 7 | #include "qabstractnetworkcache.h" |
| 8 | #include "qfileinfo.h" |
| 9 | #include "qdir.h" |
| 10 | #include "qcoreapplication.h" |
| 11 | #include "qhash.h" |
| 12 | |
| 13 | QT_BEGIN_NAMESPACE |
| 14 | |
| 15 | QNetworkAccessCacheBackend::QNetworkAccessCacheBackend() |
| 16 | : QNetworkAccessBackend(QNetworkAccessBackend::TargetType::Local) |
| 17 | { |
| 18 | } |
| 19 | |
| 20 | QNetworkAccessCacheBackend::~QNetworkAccessCacheBackend() |
| 21 | { |
| 22 | } |
| 23 | |
| 24 | void QNetworkAccessCacheBackend::open() |
| 25 | { |
| 26 | if (operation() != QNetworkAccessManager::GetOperation || !sendCacheContents()) { |
| 27 | QString msg = QCoreApplication::translate(context: "QNetworkAccessCacheBackend", key: "Error opening %1") |
| 28 | .arg(a: this->url().toString()); |
| 29 | error(code: QNetworkReply::ContentNotFoundError, errorString: msg); |
| 30 | } else { |
| 31 | setAttribute(attribute: QNetworkRequest::SourceIsFromCacheAttribute, value: true); |
| 32 | } |
| 33 | finished(); |
| 34 | } |
| 35 | |
| 36 | bool QNetworkAccessCacheBackend::sendCacheContents() |
| 37 | { |
| 38 | setCachingEnabled(false); |
| 39 | QAbstractNetworkCache *nc = networkCache(); |
| 40 | if (!nc) |
| 41 | return false; |
| 42 | |
| 43 | QNetworkCacheMetaData item = nc->metaData(url: url()); |
| 44 | if (!item.isValid()) |
| 45 | return false; |
| 46 | |
| 47 | QNetworkCacheMetaData::AttributesMap attributes = item.attributes(); |
| 48 | setAttribute(attribute: QNetworkRequest::HttpStatusCodeAttribute, value: attributes.value(key: QNetworkRequest::HttpStatusCodeAttribute)); |
| 49 | setAttribute(attribute: QNetworkRequest::HttpReasonPhraseAttribute, value: attributes.value(key: QNetworkRequest::HttpReasonPhraseAttribute)); |
| 50 | |
| 51 | // set the raw headers |
| 52 | const QNetworkCacheMetaData::RawHeaderList rawHeaders = item.rawHeaders(); |
| 53 | for (const auto &header : rawHeaders) { |
| 54 | if (header.first.toLower() == "cache-control") { |
| 55 | const QByteArray cacheControlValue = header.second.toLower(); |
| 56 | if (cacheControlValue.contains(bv: "must-revalidate") |
| 57 | || cacheControlValue.contains(bv: "no-cache")) { |
| 58 | return false; |
| 59 | } |
| 60 | } |
| 61 | setRawHeader(header: header.first, value: header.second); |
| 62 | } |
| 63 | |
| 64 | // handle a possible redirect |
| 65 | QVariant redirectionTarget = attributes.value(key: QNetworkRequest::RedirectionTargetAttribute); |
| 66 | if (redirectionTarget.isValid()) { |
| 67 | setAttribute(attribute: QNetworkRequest::RedirectionTargetAttribute, value: redirectionTarget); |
| 68 | redirectionRequested(destination: redirectionTarget.toUrl()); |
| 69 | } |
| 70 | |
| 71 | // signal we're open |
| 72 | metaDataChanged(); |
| 73 | |
| 74 | if (operation() == QNetworkAccessManager::GetOperation) { |
| 75 | device = nc->data(url: url()); |
| 76 | if (!device) |
| 77 | return false; |
| 78 | device->setParent(this); |
| 79 | readyRead(); |
| 80 | } |
| 81 | |
| 82 | #if defined(QNETWORKACCESSCACHEBACKEND_DEBUG) |
| 83 | qDebug() << "Successfully sent cache:"<< url(); |
| 84 | #endif |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | bool QNetworkAccessCacheBackend::start() |
| 89 | { |
| 90 | open(); |
| 91 | return true; |
| 92 | } |
| 93 | |
| 94 | void QNetworkAccessCacheBackend::close() { } |
| 95 | |
| 96 | qint64 QNetworkAccessCacheBackend::bytesAvailable() const |
| 97 | { |
| 98 | return device ? device->bytesAvailable() : qint64(0); |
| 99 | } |
| 100 | |
| 101 | qint64 QNetworkAccessCacheBackend::read(char *data, qint64 maxlen) |
| 102 | { |
| 103 | return device ? device->read(data, maxlen) : qint64(0); |
| 104 | } |
| 105 | |
| 106 | QT_END_NAMESPACE |
| 107 | |
| 108 |