磁盘缓存文件夹为空：Qt 4.8
我正在尝试为我的应用程序启用磁盘缓存，以获得更好的用户体验。我用这个作为指导方针。我最初认为我配置正确，因为我没有得到任何错误，但后来发现我的磁盘缓存文件夹是空的。然后我到处搜索，尝试了很多东西，但无法解决这个问题。以下是相关的代码片段 CWMWebPageCheck.h磁盘缓存文件夹为空：Qt 4.8,qt,caching,qt4.8,diskcache,Qt,Caching,Qt4.8,Diskcache,我正在尝试为我的应用程序启用磁盘缓存，以获得更好的用户体验。我用这个作为指导方针。我最初认为我配置正确，因为我没有得到任何错误，但后来发现我的磁盘缓存文件夹是空的。然后我到处搜索，尝试了很多东西，但无法解决这个问题。以下是相关的代码片段 CWMWebPageCheck.h class CWMWebPageCheck : public QObject { Q_OBJECT public: /// \brief Constructor for a CWMWebPage
class CWMWebPageCheck : public QObject
{
Q_OBJECT
public:
/// \brief Constructor for a CWMWebPageCheck object
///
/// \param oUrl
CWMWebPageCheck(QUrl oUrl);
virtual ~CWMWebPageCheck();
void initialize();
void initiateChecksumCalculation();
void resetHash();
...
protected:
///
/// \brief Reads the hash out of database.
///
void hashRead();
///
/// \brief Writes the hash into database.
///
void hashWrite();
bool m_bInitialized; ///< state if the CWMWebPageCheck has been initialized
QUrl m_oUrl; ///< the url which has to be scanned
QStringList m_oRequests; ///< list of requests
QNetworkAccessManager *m_oNetworkManager; ///< networkmanager to start network requests
//added by Isuru for implementing the diskcache
QNetworkDiskCache *m_oDiskCache;
CHashReplyManager m_oReplyManager; ///< reply manager which handles the network replies
QByteArray m_oHash; ///< the current hash
void initiateDataTransfer();
};
#endif // CWMWEBPAGECHECK_
类CWMWebPageCheck:公共QObject
{
Q_对象
公众：
///\CWMWebPageCheck对象的简短构造函数
///
///\param oUrl
CWMWebPageCheck（QUrl oUrl）；
虚拟~CWMWebPageCheck（）；
void初始化（）；
void initiateChecksumCalculation（）；
void resetHash（）；
...
受保护的：
///
///\brief从数据库中读取哈希值。
///
void hashRead（）；
///
///\brief将哈希写入数据库。
///
void hashWrite（）；
bool m_b初始化；//<如果CWMWebPageCheck已初始化，则为状态
QUrl m_oUrl；//<必须扫描的url
QStringList m_oRequests；//<请求列表
QNetworkAccessManager*m_oNetworkManager；//...
CWMWebPageCheck::CWMWebPageCheck(QUrl oUrl)
{
m_bInitialized = false;
m_oUrl = oUrl;
qDebug() << "Starting WebPageCheck with url: " << oUrl;
m_oRequests << "scripts/scripts_WM.js";
m_oRequests << "screens_wm/logbook_wm.html";
m_oNetworkManager = new QNetworkAccessManager(this);
m_oDiskCache = new QNetworkDiskCache(this);
//m_oDiskCache->setMaximumCacheSize(1000000); //set the cache to 10megs
//QString location = QStandardPaths::writableLocation(QStandardPaths::CacheLocation); //QStandardPath is not included in the Qt4.8
m_oDiskCache->setCacheDirectory(QCoreApplication::applicationDirPath() + "/Disk_cache");
//m_oDiskCache->setCacheDirectory(location);
m_oNetworkManager->setCache(m_oDiskCache);
//m_oDiskCache->maximumCacheSize(); //Returns the current maximum size in bytes for the disk cache
connect(m_oNetworkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(onReplyFinished(QNetworkReply*)));
connect(&m_oReplyManager, SIGNAL(sigCalculationError(Te_SealRequest)), this, SLOT(onSigCalculationError(Te_SealRequest)));
connect(&m_oReplyManager, SIGNAL(sigCalculationFinished(Te_SealRequest,QByteArray)), this, SLOT(onSigCalculationFinished(Te_SealRequest,QByteArray)));
m_oReplyManager.setCount(m_oRequests.length());
}
//Now comes the part where I think the problem comes from
void CWMWebPageCheck::initiateDataTransfer()
{
qDebug("*******inside initiateDataTransfer()");
for (QString oPath: m_oRequests)
{
QString sUrl = m_oUrl.toString();
// do a normal request (preferred from network, as this is the default)
// QNetworkRequest request(QUrl(QString("%1/%2").arg(sUrl).arg(oPath)));
// m_oNetworkManager->get(request);
// do a request preferred from cache
QNetworkRequest request2(QUrl(QString("%1/%2").arg(sUrl).arg(oPath)));
request2.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
m_oNetworkManager->get(request2);
/* QString sUrl = m_oUrl.toString();
// m_oNetworkManager->get(QNetworkRequest(QString("%1/%2").arg(sUrl).arg(oPath)).setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache));
//#################################################################################################
/* QNetworkRequest request(QUrl(QString("%1/%2").arg(sUrl).arg(oPath)));
*
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
m_oNetworkManager->get(request);*/
/*QNetworkRequest request = QNetworkRequest();
request.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
request.setUrl(QUrl(QString("%1/%2").arg(sUrl).arg(oPath)));
m_oNetworkManager->get(request);*/
// qDebug("***********====== GOT REQUET=======***************");
// do a request preferred from cache
/* QNetworkRequest request2(QUrl(QString("%1/%2").arg(sUrl).arg(oPath)));
request2.setAttribute(QNetworkRequest::CacheLoadControlAttribute, QNetworkRequest::PreferCache);
m_oNetworkManager->get(request2);
qDebug("***********====== GOT REQUET=======***************");*/
//#################################################################################################
}
。。。
CWMWebPageCheck:：CWMWebPageCheck（QUrl oUrl）
{
m_bininitialized=false；
m_oUrl=oUrl；
qDebug（）setCache（m_oDiskCache）；
//m_oDiskCache->maximumCacheSize（）；//返回磁盘缓存的当前最大大小（以字节为单位）
连接（m_OneWorkManager，信号（已完成（QNetworkReply*）），此，插槽（onReplyFinished（QNetworkReply*））；
连接（&m_或PlyManager，信号（sigCalculationError（Te_SealRequest）），此插槽（onSigCalculationError（Te_SealRequest））；
连接（&m_或PlyManager，信号（sigCalculationFinished（Te_SealRequest，QByteArray）），此插槽（onSigCalculationFinished（Te_SealRequest，QByteArray））；
m_oReplyManager.setCount（m_oRequests.length（））；
}
//现在是我认为问题的根源
void CWMWebPageCheck:：initiateDataTransfer（）
{
qDebug（“*******内部InitiatedStatTransfer（）”）；
对于（QString oPath:m_oRequests）
{
QString sUrl=m_oUrl.toString（）；
//执行正常请求（首选网络请求，因为这是默认请求）
//QNetworkRequest请求（QUrl（QString（“%1/%2”）.arg（sUrl.arg（oPath））；
//m_OneWorkManager->获取（请求）；
//是否从缓存中执行首选请求
QNetworkRequestRequest2（QUrl（QString（“%1/%2”）.arg（sUrl.arg（oPath））；
request2.setAttribute（QNetworkRequest:：CacheLoadControlAttribute，QNetworkRequest:：PreferCache）；
m_OneWorkManager->get（请求2）；
/*QString sUrl=m_oUrl.toString（）；
//m_oNetworkManager->get（QNetworkRequest（QString（“%1/%2”）.arg（sUrl）.arg（oPath））.setAttribute（QNetworkRequest:：CacheLoadControlAttribute，QNetworkRequest:：PreferCache））；
//#################################################################################################
/*QNetworkRequest请求（QUrl（QString（“%1/%2”）.arg（sUrl.arg（oPath））；
*
setAttribute（QNetworkRequest:：CacheLoadControlAttribute，QNetworkRequest:：PreferCache）；
m_OneWorkManager->获取（请求）*/
/*QNetworkRequest=QNetworkRequest（）；
setAttribute（QNetworkRequest:：CacheLoadControlAttribute，QNetworkRequest:：PreferCache）；
setUrl（QUrl（QString（“%1/%2”）.arg（sUrl.arg（oPath））；
m_OneWorkManager->获取（请求）*/
//qDebug（“*********===============================********************”；
//是否从缓存中执行首选请求
/*QNetworkRequestRequest2（QUrl（QString（“%1/%2”）.arg（sUrl.arg（oPath））；
request2.setAttribute（QNetworkRequest:：CacheLoadControlAttribute，QNetworkRequest:：PreferCache）；
m_OneWorkManager->get（请求2）；
qDebug（“*********===============================********************”*/
//#################################################################################################
}