network access manager for QGISThis class implements the QGIS network access manager. More...

#include <qgsnetworkaccessmanager.h>

Inheritance diagram for QgsNetworkAccessManager:

Signals
void	downloadProgress (int requestId, qint64 bytesReceived, qint64 bytesTotal)
	Emitted when a network reply receives a progress report. More...

void	finished (QgsNetworkReplyContent reply)
	Emitted whenever a pending network reply is finished. More...

Q_DECL_DEPRECATED void	requestAboutToBeCreated (QNetworkAccessManager::Operation, const QNetworkRequest &, QIODevice *)

void	requestAboutToBeCreated (QgsNetworkRequestParameters request)
	Emitted when a network request is about to be created. More...

void	requestAuthDetailsAdded (int requestId, const QString &realm, const QString &user, const QString &password)
	Emitted when network authentication details have been added to a request. More...

Q_DECL_DEPRECATED void	requestCreated (QNetworkReply *)

void	requestEncounteredSslErrors (int requestId, const QList< QSslError > &errors)
	Emitted when a network request encounters SSL errors. More...

void	requestRequiresAuth (int requestId, const QString &realm)
	Emitted when a network request prompts an authentication request. More...

void	requestTimedOut (QgsNetworkRequestParameters request)
	Emitted when a network request has timed out. More...

void	requestTimedOut (QNetworkReply *)

Public Member Functions
	QgsNetworkAccessManager (QObject *parent=nullptr)

QStringList	excludeList () const
	Returns the proxy exclude list. More...

const QNetworkProxy &	fallbackProxy () const
	Returns the fallback proxy used by the manager. More...

void	insertProxyFactory (QNetworkProxyFactory *factory)
	Inserts a factory into the proxy factories list. More...

const QList< QNetworkProxyFactory * >	proxyFactories () const
	Returns a list of proxy factories used by the manager. More...

void	removeProxyFactory (QNetworkProxyFactory *factory)
	Removes a factory from the proxy factories list. More...

void	setAuthHandler (std::unique_ptr< QgsNetworkAuthenticationHandler > handler)
	Sets the application network authentication handler, which is used to respond to network authentication prompts during network requests. More...

void	setFallbackProxyAndExcludes (const QNetworkProxy &proxy, const QStringList &excludes)
	Sets the fallback proxy and URLs which shouldn't use it. More...

void	setSslErrorHandler (std::unique_ptr< QgsSslErrorHandler > handler)
	Sets the application SSL error handler, which is used to respond to SSL errors encountered during network requests. More...

void	setupDefaultProxyAndCache (Qt::ConnectionType connectionType=Qt::BlockingQueuedConnection)
	Setup the QgsNetworkAccessManager (NAM) according to the user's settings. More...

bool	useSystemProxy () const
	Returns whether the system proxy should be used. More...

Static Public Member Functions
static QgsNetworkReplyContent	blockingGet (QNetworkRequest &request, const QString &authCfg=QString(), bool forceRefresh=false, QgsFeedback *feedback=nullptr)
	Posts a GET request to obtain the contents of the target request and returns a new QgsNetworkReplyContent object for reading. More...

static QgsNetworkReplyContent	blockingPost (QNetworkRequest &request, const QByteArray &data, const QString &authCfg=QString(), bool forceRefresh=false, QgsFeedback *feedback=nullptr)
	Posts a POST request to obtain the contents of the target request, using the given data, and returns a new QgsNetworkReplyContent object for reading. More...

static QNetworkRequest::CacheLoadControl	cacheLoadControlFromName (const QString &name)
	Returns QNetworkRequest::CacheLoadControl from a name. More...

static QString	cacheLoadControlName (QNetworkRequest::CacheLoadControl control)
	Returns the name for QNetworkRequest::CacheLoadControl. More...

static QgsNetworkAccessManager *	instance (Qt::ConnectionType connectionType=Qt::BlockingQueuedConnection)
	Returns a pointer to the active QgsNetworkAccessManager for the current thread. More...

static void	setTimeout (int time)
	Sets the maximum timeout time for network requests, in milliseconds. More...

static int	timeout ()
	Returns the network timeout length, in milliseconds. More...

Protected Member Functions
QNetworkReply *	createRequest (QNetworkAccessManager::Operation op, const QNetworkRequest &req, QIODevice *outgoingData=nullptr) override

Detailed Description

network access manager for QGIS

This class implements the QGIS network access manager.

It's a singleton that can be used across QGIS.

Plugins can insert proxy factories and thereby redirect requests to individual proxies.

If no proxy factories are there or none returns a proxy for an URL a fallback proxy can be set. There's also a exclude list that defines URLs that the fallback proxy should not be used for, then no proxy will be used.

Since: 1.5

Definition at line 251 of file qgsnetworkaccessmanager.h.

Constructor & Destructor Documentation

◆ QgsNetworkAccessManager()

QgsNetworkAccessManager::QgsNetworkAccessManager ( QObject * parent = nullptr )

Definition at line 125 of file qgsnetworkaccessmanager.cpp.

Member Function Documentation

◆ blockingGet()

QgsNetworkReplyContent QgsNetworkAccessManager::blockingGet	(	QNetworkRequest &	request,
		const QString &	authCfg = `QString()`,
		bool	forceRefresh = `false`,
		QgsFeedback *	feedback = `nullptr`
	)

static

Posts a GET request to obtain the contents of the target request and returns a new QgsNetworkReplyContent object for reading.

The current thread will be blocked until the request is returned.

This method is safe to call in either the main thread or a worker thread.

If forceRefresh is false then previously cached replies may be used for the request. If it is set to true then a new query is always performed.

If an authCfg has been specified, then that authentication configuration required will automatically be applied to request. There is no need to manually apply the authentication to the request prior to calling this method.

The optional feedback argument can be used to abort ongoing requests.

The contents of the reply will be returned after the request is completed or an error occurs.

See also: blockingPost()

Since: QGIS 3.6

Definition at line 626 of file qgsnetworkaccessmanager.cpp.

◆ blockingPost()

QgsNetworkReplyContent QgsNetworkAccessManager::blockingPost	(	QNetworkRequest &	request,
		const QByteArray &	data,
		const QString &	authCfg = `QString()`,
		bool	forceRefresh = `false`,
		QgsFeedback *	feedback = `nullptr`
	)

static

Posts a POST request to obtain the contents of the target request, using the given data, and returns a new QgsNetworkReplyContent object for reading.

The current thread will be blocked until the request is returned.

This method is safe to call in either the main thread or a worker thread.

If forceRefresh is false then previously cached replies may be used for the request. If it is set to true then a new query is always performed.

If an authCfg has been specified, then that authentication configuration required will automatically be applied to request. There is no need to manually apply the authentication to the request prior to calling this method.

The optional feedback argument can be used to abort ongoing requests.

The contents of the reply will be returned after the request is completed or an error occurs.

See also: blockingGet()

Since: QGIS 3.6

Definition at line 634 of file qgsnetworkaccessmanager.cpp.

◆ cacheLoadControlFromName()

QNetworkRequest::CacheLoadControl QgsNetworkAccessManager::cacheLoadControlFromName ( const QString & name )

static

Returns QNetworkRequest::CacheLoadControl from a name.

See also: cacheLoadControlName()

Definition at line 457 of file qgsnetworkaccessmanager.cpp.

◆ cacheLoadControlName()

QString QgsNetworkAccessManager::cacheLoadControlName ( QNetworkRequest::CacheLoadControl control )

static

Returns the name for QNetworkRequest::CacheLoadControl.

See also: cacheLoadControlFromName()

Definition at line 441 of file qgsnetworkaccessmanager.cpp.

◆ createRequest()

QNetworkReply * QgsNetworkAccessManager::createRequest	(	QNetworkAccessManager::Operation	op,
		const QNetworkRequest &	req,
		QIODevice *	outgoingData = `nullptr`
	)

overrideprotected

Definition at line 194 of file qgsnetworkaccessmanager.cpp.

◆ downloadProgress

void QgsNetworkAccessManager::downloadProgress	(	int	requestId,
		qint64	bytesReceived,
		qint64	bytesTotal
	)

signal

Emitted when a network reply receives a progress report.

The requestId argument reflects the unique ID identifying the original request which the progress report relates to.

The bytesReceived parameter indicates the number of bytes received, while bytesTotal indicates the total number of bytes expected to be downloaded. If the number of bytes to be downloaded is not known, bytesTotal will be -1.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about requests created in any thread.

Since: QGIS 3.6

◆ excludeList()

QStringList QgsNetworkAccessManager::excludeList ( ) const

Returns the proxy exclude list.

This list consists of the beginning of URL strings which will not use the fallback proxy.

See also: fallbackProxy(); setFallbackProxyAndExcludes()

Definition at line 158 of file qgsnetworkaccessmanager.cpp.

◆ fallbackProxy()

const QNetworkProxy & QgsNetworkAccessManager::fallbackProxy ( ) const

Returns the fallback proxy used by the manager.

The fallback proxy is used for URLs which no other proxy factory returned proxies for.

See also: proxyFactories(); setFallbackProxyAndExcludes()

Definition at line 163 of file qgsnetworkaccessmanager.cpp.

◆ finished

void QgsNetworkAccessManager::finished ( QgsNetworkReplyContent reply )

signal

Emitted whenever a pending network reply is finished.

The reply parameter will contain a QgsNetworkReplyContent object, containing all the useful information relating to the reply, including headers and reply content.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about requests created in any thread.

See also: requestAboutToBeCreated( QgsNetworkRequestParameters ); requestTimedOut( QgsNetworkRequestParameters )

Since: QGIS 3.6

◆ insertProxyFactory()

void QgsNetworkAccessManager::insertProxyFactory ( QNetworkProxyFactory * factory )

Inserts a factory into the proxy factories list.

Ownership of factory is transferred to the manager.

See also: removeProxyFactory(); proxyFactories()

Definition at line 143 of file qgsnetworkaccessmanager.cpp.

◆ instance()

QgsNetworkAccessManager * QgsNetworkAccessManager::instance ( Qt::ConnectionType connectionType = Qt::BlockingQueuedConnection )

static

Returns a pointer to the active QgsNetworkAccessManager for the current thread.

With the connectionType parameter it is possible to setup the default connection type that is used to handle signals that might require user interaction and therefore need to be handled on the main thread. See in-depth discussion below.

Parameters

connectionType In most cases the default of using a Qt::BlockingQueuedConnection is ok, to make a background thread wait for the main thread to answer such a request is fine and anything else is dangerous. However, in case the request was started on the main thread, one should execute a local event loop in a helper thread and freeze the main thread for the duration of the download. In this case, if an authentication request is sent from the background thread network access manager, the background thread should be blocked, the main thread be woken up, processEvents() executed once, the main thread frozen again and the background thread continued.

Definition at line 111 of file qgsnetworkaccessmanager.cpp.

◆ proxyFactories()

const QList< QNetworkProxyFactory * > QgsNetworkAccessManager::proxyFactories ( ) const

Returns a list of proxy factories used by the manager.

See also: insertProxyFactory(); proxyFactories()

Definition at line 153 of file qgsnetworkaccessmanager.cpp.

◆ removeProxyFactory()

void QgsNetworkAccessManager::removeProxyFactory ( QNetworkProxyFactory * factory )

Removes a factory from the proxy factories list.

See also: insertProxyFactory(); proxyFactories()

Definition at line 148 of file qgsnetworkaccessmanager.cpp.

◆ requestAboutToBeCreated [1/2]

Q_DECL_DEPRECATED void QgsNetworkAccessManager::requestAboutToBeCreated	(	QNetworkAccessManager::Operation	,
		const QNetworkRequest &	,
		QIODevice *
	)

signal

Deprecated:: Use the thread-safe requestAboutToBeCreated( QgsNetworkRequestParameters ) signal instead.

◆ requestAboutToBeCreated [2/2]

void QgsNetworkAccessManager::requestAboutToBeCreated ( QgsNetworkRequestParameters request )

signal

Emitted when a network request is about to be created.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about requests created in any thread.

See also: finished( QgsNetworkReplyContent ); requestTimedOut( QgsNetworkRequestParameters )

Since: QGIS 3.6

◆ requestAuthDetailsAdded

void QgsNetworkAccessManager::requestAuthDetailsAdded	(	int	requestId,
		const QString &	realm,
		const QString &	user,
		const QString &	password
	)

signal

Emitted when network authentication details have been added to a request.

The requestId argument reflects the unique ID identifying the original request which the authentication relates to.

This signal is always sent from the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about authentication requests from any thread.

This signal is for debugging and logging purposes only, and should not be used to respond to the requests. See QgsNetworkAuthenticationHandler for details on how to handle authentication requests.

See also: requestRequiresAuth()

Since: QGIS 3.6

◆ requestCreated

Q_DECL_DEPRECATED void QgsNetworkAccessManager::requestCreated ( QNetworkReply * )

signal

Deprecated:: Use the thread-safe requestAboutToBeCreated( QgsNetworkRequestParameters ) signal instead.

◆ requestEncounteredSslErrors

void QgsNetworkAccessManager::requestEncounteredSslErrors	(	int	requestId,
		const QList< QSslError > &	errors
	)

signal

Emitted when a network request encounters SSL errors.

The requestId argument reflects the unique ID identifying the original request which the SSL error relates to.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about SSL errors from any thread.

This signal is for debugging and logging purposes only, and cannot be used to respond to the errors. See QgsSslErrorHandler for details on how to handle SSL errors and potentially ignore them.

Since: QGIS 3.6

◆ requestRequiresAuth

void QgsNetworkAccessManager::requestRequiresAuth	(	int	requestId,
		const QString &	realm
	)

signal

Emitted when a network request prompts an authentication request.

The requestId argument reflects the unique ID identifying the original request which the authentication relates to.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about authentication requests from any thread.

This signal is for debugging and logging purposes only, and cannot be used to respond to the requests. See QgsNetworkAuthenticationHandler for details on how to handle authentication requests.

See also: requestAuthDetailsAdded()

Since: QGIS 3.6

◆ requestTimedOut [1/2]

void QgsNetworkAccessManager::requestTimedOut ( QgsNetworkRequestParameters request )

signal

Emitted when a network request has timed out.

This signal is propagated to the main thread QgsNetworkAccessManager instance, so it is necessary only to connect to the main thread's signal in order to receive notifications about requests created in any thread.

See also: requestAboutToBeCreated( QgsNetworkRequestParameters ); finished( QgsNetworkReplyContent )

Since: QGIS 3.6

◆ requestTimedOut [2/2]

void QgsNetworkAccessManager::requestTimedOut ( QNetworkReply * )

signal

◆ setAuthHandler()

void QgsNetworkAccessManager::setAuthHandler ( std::unique_ptr< QgsNetworkAuthenticationHandler > handler )

Sets the application network authentication handler, which is used to respond to network authentication prompts during network requests.

Ownership of handler is transferred to the main thread QgsNetworkAccessManager instance.

This method must ONLY be called on the main thread QgsNetworkAccessManager. It is not necessary to set handlers for background threads – the main thread QgsNetworkAuthenticationHandler will automatically be used in a thread-safe manner for any authentication requests encountered on background threads.

The default QgsNetworkAuthenticationHandler responds to request only by logging the request, but does not provide any username or password resolution.

Note: Not available in Python bindings.

Since: QGIS 3.6

Definition at line 137 of file qgsnetworkaccessmanager.cpp.

◆ setFallbackProxyAndExcludes()

void QgsNetworkAccessManager::setFallbackProxyAndExcludes	(	const QNetworkProxy &	proxy,
		const QStringList &	excludes
	)

Sets the fallback proxy and URLs which shouldn't use it.

The fallback proxy is used for URLs which no other proxy factory returned proxies for. The excludes list specifies the beginning of URL strings which will not use this fallback proxy.

See also: fallbackProxy(); excludeList()

Definition at line 168 of file qgsnetworkaccessmanager.cpp.

◆ setSslErrorHandler()

void QgsNetworkAccessManager::setSslErrorHandler ( std::unique_ptr< QgsSslErrorHandler > handler )

Sets the application SSL error handler, which is used to respond to SSL errors encountered during network requests.

Ownership of handler is transferred to the main thread QgsNetworkAccessManager instance.

This method must ONLY be called on the main thread QgsNetworkAccessManager. It is not necessary to set handlers for background threads – the main thread QgsSslErrorHandler will automatically be used in a thread-safe manner for any SSL errors encountered on background threads.

The default QgsSslErrorHandler responds to SSL errors only by logging the errors, and uses the default Qt response, which is to abort the request.

Note: Not available in Python bindings.

Since: QGIS 3.6

Definition at line 131 of file qgsnetworkaccessmanager.cpp.

◆ setTimeout()

void QgsNetworkAccessManager::setTimeout ( int time )

static

Sets the maximum timeout time for network requests, in milliseconds.

See also: timeout()

Since: QGIS 3.6

Definition at line 621 of file qgsnetworkaccessmanager.cpp.

◆ setupDefaultProxyAndCache()

void QgsNetworkAccessManager::setupDefaultProxyAndCache ( Qt::ConnectionType connectionType = Qt::BlockingQueuedConnection )

Setup the QgsNetworkAccessManager (NAM) according to the user's settings.

The connectionType sets up the default connection type that is used to handle signals that might require user interaction and therefore need to be handled on the main thread. See in-depth discussion in the documentation for the constructor of this class.

Definition at line 478 of file qgsnetworkaccessmanager.cpp.

◆ timeout()

int QgsNetworkAccessManager::timeout ( )

static

Returns the network timeout length, in milliseconds.

See also: setTimeout()

Since: QGIS 3.6

Definition at line 616 of file qgsnetworkaccessmanager.cpp.

◆ useSystemProxy()

bool QgsNetworkAccessManager::useSystemProxy ( ) const

inline

Returns whether the system proxy should be used.

Definition at line 401 of file qgsnetworkaccessmanager.h.

The documentation for this class was generated from the following files:

/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgsnetworkaccessmanager.h
/tmp/buildd/qgis-3.8.0+99unstable/src/core/qgsnetworkaccessmanager.cpp

Signals

Public Member Functions

Static Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QgsNetworkAccessManager()

Member Function Documentation

◆ blockingGet()

◆ blockingPost()

◆ cacheLoadControlFromName()

◆ cacheLoadControlName()

◆ createRequest()

◆ downloadProgress

◆ excludeList()

◆ fallbackProxy()

◆ finished

◆ insertProxyFactory()

◆ instance()

◆ proxyFactories()

◆ removeProxyFactory()

◆ requestAboutToBeCreated [1/2]

◆ requestAboutToBeCreated [2/2]

◆ requestAuthDetailsAdded

◆ requestCreated

◆ requestEncounteredSslErrors

◆ requestRequiresAuth

◆ requestTimedOut [1/2]

◆ requestTimedOut [2/2]

◆ setAuthHandler()

◆ setFallbackProxyAndExcludes()

◆ setSslErrorHandler()

◆ setTimeout()

◆ setupDefaultProxyAndCache()

◆ timeout()

◆ useSystemProxy()