QHttp2Configuration Class

The QHttp2Configuration class controls HTTP/2 parameters and settings. More...

Header:	#include <QHttp2Configuration>
CMake:	find_package(Qt6 COMPONENTS Network REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Network)
qmake:	QT += network
Since:	Qt 5.14

• List of all members, including inherited members

Note: All functions in this class are reentrant.

Public Functions

	QHttp2Configuration(QHttp2Configuration &&other)
	QHttp2Configuration(const QHttp2Configuration &other)
	QHttp2Configuration()
QHttp2Configuration &	operator=(QHttp2Configuration &&other)
QHttp2Configuration &	operator=(const QHttp2Configuration &other)
	~QHttp2Configuration()
bool	huffmanCompressionEnabled() const
unsigned int	maxFrameSize() const
bool	serverPushEnabled() const
unsigned int	sessionReceiveWindowSize() const
void	setHuffmanCompressionEnabled(bool enable)
bool	setMaxFrameSize(unsigned int size)
void	setServerPushEnabled(bool enable)
bool	setSessionReceiveWindowSize(unsigned int size)
bool	setStreamReceiveWindowSize(unsigned int size)
unsigned int	streamReceiveWindowSize() const
void	swap(QHttp2Configuration &other)

Related Non-Members

bool	operator!=(const QHttp2Configuration &lhs, const QHttp2Configuration &rhs)
bool	operator==(const QHttp2Configuration &lhs, const QHttp2Configuration &rhs)

Detailed Description

QHttp2Configuration controls HTTP/2 parameters and settings that QNetworkAccessManager will use to send requests and process responses when the HTTP/2 protocol is enabled.

The HTTP/2 parameters that QHttp2Configuration currently supports include:

• The session window size for connection-level flow control. Will be sent to a remote peer when needed as 'WINDOW_UPDATE' frames on the stream with an identifier 0.
• The stream receiving window size for stream-level flow control. Sent as 'SETTINGS_INITIAL_WINDOW_SIZE' parameter in the initial SETTINGS frame and, when needed, 'WINDOW_UPDATE' frames will be sent on streams that QNetworkAccessManager opens.
• The maximum frame size. This parameter limits the maximum payload a frame coming from the remote peer can have. Sent by QNetworkAccessManager as 'SETTINGS_MAX_FRAME_SIZE' parameter in the initial 'SETTINGS' frame.
• The server push. Allows to enable or disable server push. Sent as 'SETTINGS_ENABLE_PUSH' parameter in the initial 'SETTINGS' frame.

The QHttp2Configuration class also controls if the header compression algorithm (HPACK) is additionally using Huffman coding for string compression.

See also QNetworkRequest::setHttp2Configuration(), QNetworkRequest::http2Configuration(), and QNetworkAccessManager.

Member Function Documentation

QHttp2Configuration::QHttp2Configuration(QHttp2Configuration &&other)

Move-constructs this QHttp2Configuration from other

QHttp2Configuration::QHttp2Configuration(const QHttp2Configuration &other)

Copy-constructs this QHttp2Configuration.

QHttp2Configuration::QHttp2Configuration()

Default constructs a QHttp2Configuration object.

Such a configuration has the following values:

• Server push is disabled
• Huffman string compression is enabled
• Window size for connection-level flow control is 65535 octets
• Window size for stream-level flow control is 65535 octets
• Frame size is 16384 octets

QHttp2Configuration &QHttp2Configuration::operator=(QHttp2Configuration &&other)

Move-assigns other to this QHttp2Configuration.

QHttp2Configuration &QHttp2Configuration::operator=(const QHttp2Configuration &other)

Copy-assigns other to this QHttp2Configuration.

QHttp2Configuration::~QHttp2Configuration()

Destructor.

bool QHttp2Configuration::huffmanCompressionEnabled() const

Returns true if the Huffman coding in HPACK is enabled.

See also setHuffmanCompressionEnabled.

unsigned int QHttp2Configuration::maxFrameSize() const

Returns the maximum payload size that HTTP/2 frames can have. The default (initial) value is 16384 octets.

See also setMaxFrameSize().

bool QHttp2Configuration::serverPushEnabled() const

Returns true if server push was enabled.

See also setServerPushEnabled.

unsigned int QHttp2Configuration::sessionReceiveWindowSize() const

Returns the window size for connection-level flow control. The default value QNetworkAccessManager will be using is 2147483647 octets.

See also setSessionReceiveWindowSize().

void QHttp2Configuration::setHuffmanCompressionEnabled(bool enable)

If enable is true, HPACK compression will additionally compress string using the Huffman coding. Enabled by default.

See also huffmanCompressionEnabled.

bool QHttp2Configuration::setMaxFrameSize(unsigned int size)

Sets the maximum frame size that QNetworkAccessManager will advertise to the server when sending its initial SETTINGS frame.

Returns true on success, false otherwise.

See also maxFrameSize().

void QHttp2Configuration::setServerPushEnabled(bool enable)

If enable is true, a remote server can potentially use server push to send responses in advance.

See also serverPushEnabled.

bool QHttp2Configuration::setSessionReceiveWindowSize(unsigned int size)

Sets the window size for connection-level flow control. size cannot be 0 and must not exceed 2147483647 octets.

Returns true on success, false otherwise.

See also sessionReceiveWindowSize.

bool QHttp2Configuration::setStreamReceiveWindowSize(unsigned int size)

Sets the window size for stream-level flow control. size cannot be 0 and must not exceed 2147483647 octets.

Returns true on success, false otherwise.

See also streamReceiveWindowSize.

unsigned int QHttp2Configuration::streamReceiveWindowSize() const

Returns the window size for stream-level flow control. The default value QNetworkAccessManager will be using is 65535 octets (see RFC 7540).

See also setStreamReceiveWindowSize().

void QHttp2Configuration::swap(QHttp2Configuration &other)

Swaps this configuration with the other configuration.