Qt之QNetworkAccessManager

QNetworkAccessManager类可以向服务器发送请求和接受应答。

QNetworkAccessManager类是网络访问API的主要部分，包含了对请求的配置与设置，还有监控网络操作过程的应答信号，以及其他相关信号。

简单事例如下：

  QNetworkAccessManager *manager = new QNetworkAccessManager(this);

  connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));

  manager->get(ANetworkRequest(QUrl("http://qt.nokia.com")));

当replyFinished(QNetworkReply*)被调用后，下载的数据和metadata会保存在QNetworkReply中。

当数据返回后，需要用户在合适的时间来删除QNetworkReply，不要直接在与finished相关联的槽中直接删除，可以使用deleteLater()删除。

QNetworkAccessManager会把收到的请求排队处理。

Public Types

enum	NetworkAccessibility { UnknownAccessibility, NotAccessible, Accessible }
enum	Operation { HeadOperation, GetOperation, PutOperation, PostOperation, DeleteOperation, CustomOperation }

Properties

• networkAccessible : NetworkAccessibility

• 1 property inherited from QObject

Public Functions

	QNetworkAccessManager ( QObject * parent = 0 )
	~QNetworkAccessManager ()
QNetworkConfiguration	activeConfiguration () const
QAbstractNetworkCache *	cache () const
QNetworkConfiguration	configuration () const
QNetworkCookieJar *	cookieJar () const
QNetworkReply *	deleteResource ( const QNetworkRequest & request )
QNetworkReply *	get ( const QNetworkRequest & request )
QNetworkReply *	head ( const QNetworkRequest & request )
NetworkAccessibility	networkAccessible () const
QNetworkReply *	post ( const QNetworkRequest & request, QIODevice * data )
QNetworkReply *	post ( const QNetworkRequest & request, const QByteArray & data )
QNetworkReply *	post ( const QNetworkRequest & request, QHttpMultiPart * multiPart )
QNetworkProxy	proxy () const
QNetworkProxyFactory *	proxyFactory () const
QNetworkReply *	put ( const QNetworkRequest & request, QIODevice * data )
QNetworkReply *	put ( const QNetworkRequest & request, QHttpMultiPart * multiPart )
QNetworkReply *	put ( const QNetworkRequest & request, const QByteArray & data )
QNetworkReply *	sendCustomRequest ( const QNetworkRequest & request, const QByteArray & verb, QIODevice * data = 0 )
void	setCache ( QAbstractNetworkCache * cache )
void	setConfiguration ( const QNetworkConfiguration & config )
void	setCookieJar ( QNetworkCookieJar * cookieJar )
void	setNetworkAccessible ( NetworkAccessibility accessible )
void	setProxy ( const QNetworkProxy & proxy )
void	setProxyFactory ( QNetworkProxyFactory * factory )

• 29 public functions inherited from QObject

Signals

void	authenticationRequired ( QNetworkReply * reply, QAuthenticator * authenticator )
void	finished ( QNetworkReply * reply )
void	networkAccessibleChanged ( QNetworkAccessManager::NetworkAccessibility accessible )
void	proxyAuthenticationRequired ( const QNetworkProxy & proxy, QAuthenticator * authenticator )
void	sslErrors ( QNetworkReply * reply, const QList & errors )

• 1 signal inherited from QObject

Protected Functions

virtual QNetworkReply *

createRequest ( Operation op, const QNetworkRequest & req, QIODevice * outgoingData = 0 )