source: trunk/src/network/access/qnetworkaccesscachebackend.cpp@ 846

Last change on this file since 846 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

File size: 5.1 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtNetwork module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
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** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
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
51QT_BEGIN_NAMESPACE
52
53QNetworkAccessCacheBackend::QNetworkAccessCacheBackend()
54 : QNetworkAccessBackend()
55 , device(0)
56{
57}
58
59QNetworkAccessCacheBackend::~QNetworkAccessCacheBackend()
60{
61}
62
63void 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
74bool 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
121void QNetworkAccessCacheBackend::closeDownstreamChannel()
122{
123 if (operation() == QNetworkAccessManager::GetOperation) {
124 device->close();
125 delete device;
126 device = 0;
127 }
128}
129
130void QNetworkAccessCacheBackend::closeUpstreamChannel()
131{
132 Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");
133}
134
135void QNetworkAccessCacheBackend::upstreamReadyRead()
136{
137 Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");
138}
139
140void QNetworkAccessCacheBackend::downstreamReadyWrite()
141{
142 Q_ASSERT_X(false, Q_FUNC_INFO, "This function show not have been called!");
143}
144
145QT_END_NAMESPACE
146
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