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2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
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5 | ** |
6 | ** This file is part of the QtNetwork module of the Qt Toolkit. |
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8 | ** $QT_BEGIN_LICENSE:LGPL$ |
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38 | ****************************************************************************/ |
39 | |
40 | //#define QNETWORKACCESSCACHEBACKEND_DEBUG |
41 | |
42 | #include "qnetworkaccesscachebackend_p.h" |
43 | #include "qabstractnetworkcache.h" |
44 | #include "qfileinfo.h" |
45 | #if QT_CONFIG(ftp) |
46 | #include "qurlinfo_p.h" |
47 | #endif |
48 | #include "qdir.h" |
49 | #include "qcoreapplication.h" |
50 | |
51 | QT_BEGIN_NAMESPACE |
52 | |
53 | QNetworkAccessCacheBackend::QNetworkAccessCacheBackend() |
54 | : QNetworkAccessBackend() |
55 | { |
56 | } |
57 | |
58 | QNetworkAccessCacheBackend::~QNetworkAccessCacheBackend() |
59 | { |
60 | } |
61 | |
62 | void QNetworkAccessCacheBackend::open() |
63 | { |
64 | if (operation() != QNetworkAccessManager::GetOperation || !sendCacheContents()) { |
65 | QString msg = QCoreApplication::translate(context: "QNetworkAccessCacheBackend" , key: "Error opening %1" ) |
66 | .arg(a: this->url().toString()); |
67 | error(code: QNetworkReply::ContentNotFoundError, errorString: msg); |
68 | } else { |
69 | setAttribute(code: QNetworkRequest::SourceIsFromCacheAttribute, value: 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: url()); |
82 | if (!item.isValid()) |
83 | return false; |
84 | |
85 | QNetworkCacheMetaData::AttributesMap attributes = item.attributes(); |
86 | setAttribute(code: QNetworkRequest::HttpStatusCodeAttribute, value: attributes.value(akey: QNetworkRequest::HttpStatusCodeAttribute)); |
87 | setAttribute(code: QNetworkRequest::HttpReasonPhraseAttribute, value: attributes.value(akey: QNetworkRequest::HttpReasonPhraseAttribute)); |
88 | |
89 | // set the raw headers |
90 | const QNetworkCacheMetaData::RawHeaderList = item.rawHeaders(); |
91 | for (const auto & : rawHeaders) { |
92 | if (header.first.toLower() == "cache-control" ) { |
93 | const QByteArray cacheControlValue = header.second.toLower(); |
94 | if (cacheControlValue.contains(c: "must-revalidate" ) |
95 | || cacheControlValue.contains(c: "no-cache" )) { |
96 | return false; |
97 | } |
98 | } |
99 | setRawHeader(headerName: header.first, value: header.second); |
100 | } |
101 | |
102 | // handle a possible redirect |
103 | QVariant redirectionTarget = attributes.value(akey: QNetworkRequest::RedirectionTargetAttribute); |
104 | if (redirectionTarget.isValid()) { |
105 | setAttribute(code: QNetworkRequest::RedirectionTargetAttribute, value: redirectionTarget); |
106 | redirectionRequested(destination: redirectionTarget.toUrl()); |
107 | } |
108 | |
109 | // signal we're open |
110 | metaDataChanged(); |
111 | |
112 | if (operation() == QNetworkAccessManager::GetOperation) { |
113 | QIODevice *contents = nc->data(url: url()); |
114 | if (!contents) |
115 | return false; |
116 | contents->setParent(this); |
117 | writeDownstreamData(data: contents); |
118 | } |
119 | |
120 | #if defined(QNETWORKACCESSCACHEBACKEND_DEBUG) |
121 | qDebug() << "Successfully sent cache:" << url(); |
122 | #endif |
123 | return true; |
124 | } |
125 | |
126 | bool QNetworkAccessCacheBackend::start() |
127 | { |
128 | open(); |
129 | return true; |
130 | } |
131 | |
132 | void QNetworkAccessCacheBackend::closeDownstreamChannel() |
133 | { |
134 | } |
135 | |
136 | void QNetworkAccessCacheBackend::closeUpstreamChannel() |
137 | { |
138 | Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!" ); |
139 | } |
140 | |
141 | void QNetworkAccessCacheBackend::upstreamReadyRead() |
142 | { |
143 | Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!" ); |
144 | } |
145 | |
146 | void QNetworkAccessCacheBackend::downstreamReadyWrite() |
147 | { |
148 | Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!" ); |
149 | } |
150 | |
151 | QT_END_NAMESPACE |
152 | |
153 | |