Unity 8
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CachingNetworkManagerFactory.cpp
1 /*
2  * Copyright (C) 2014 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  */
17 
18 #include "CachingNetworkManagerFactory.h"
19 
20 #include <QNetworkDiskCache>
21 #include <QNetworkAccessManager>
22 #include <QStandardPaths>
23 #include <QNetworkConfigurationManager>
24 
25 CachingNetworkAccessManager::CachingNetworkAccessManager(QObject *parent)
26  : QNetworkAccessManager(parent)
27 {
28  m_networkManager = new QNetworkConfigurationManager(this);
29 
30  QObject::connect(m_networkManager, &QNetworkConfigurationManager::onlineStateChanged, this, &CachingNetworkAccessManager::onlineStateChanged);
31  m_isOnline = m_networkManager->isOnline();
32 }
33 
34 void CachingNetworkAccessManager::onlineStateChanged(bool isOnline)
35 {
36  m_isOnline = isOnline;
37 }
38 
39 QNetworkReply* CachingNetworkAccessManager::createRequest(Operation op, const QNetworkRequest &request, QIODevice *outgoingData)
40 {
41  if (!m_isOnline) {
42  QNetworkRequest req(request);
43  req.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::AlwaysCache);
44  return QNetworkAccessManager::createRequest(op, req, outgoingData);
45  }
46 
47  return QNetworkAccessManager::createRequest(op, request, outgoingData);
48 }
49 
50 CachingNetworkManagerFactory::CachingNetworkManagerFactory()
51 {
52 }
53 
54 QNetworkAccessManager *CachingNetworkManagerFactory::create(QObject *parent) {
55  QNetworkAccessManager *manager = new CachingNetworkAccessManager(parent);
56 
57  QNetworkDiskCache* cache = new QNetworkDiskCache(manager);
58  cache->setCacheDirectory(QString("%1/network").arg(QStandardPaths::writableLocation(QStandardPaths::CacheLocation)));
59 
60  manager->setCache(cache);
61  return manager;
62 }