QHttp2Configuration Class▲
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Header: QHttp2Configuration
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Since: Qt 5.14
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CMake:
find_package(Qt6 REQUIRED COMPONENTS Network)
target_link_libraries(mytarget PRIVATE Qt6::Network)
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qmake: QT += network
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Group: QHttp2Configuration is part of Network Programming API, shared
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:
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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.
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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.
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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.
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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.
The configuration must be set before the first request was sent to a given host (and thus an HTTP/2 session established).
Details about flow control, server push and 'SETTINGS' can be found in RFC 7540. Different modes and parameters of the HPACK compression algorithm are described in RFC 7541.
See Also▲
Member Function Documentation▲
QHttp2Configuration::QHttp2Configuration()▲
Default constructs a QHttp2Configuration object.
Such a configuration has the following values:
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Server push is disabled
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Huffman string compression is enabled
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Window size for connection-level flow control is 65535 octets
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Window size for stream-level flow control is 65535 octets
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Frame size is 16384 octets
QHttp2Configuration::QHttp2Configuration(const QHttp2Configuration &other)▲
Copy-constructs this QHttp2Configuration.
QHttp2Configuration::QHttp2Configuration(QHttp2Configuration &&other)▲
Move-constructs this QHttp2Configuration from other
QHttp2Configuration::~QHttp2Configuration()▲
Destructor.
bool QHttp2Configuration::huffmanCompressionEnabled() const▲
Returns true if the Huffman coding in HPACK is enabled.
See Also▲
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▲
See also setMaxFrameSize()
bool QHttp2Configuration::serverPushEnabled() const▲
Returns true if server push was enabled.
By default, QNetworkAccessManager disables server push via the 'SETTINGS' frame.
See Also▲
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▲
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.
This parameter only affects 'HEADERS' frames that QNetworkAccessManager is sending.
See Also▲
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.
While this size is required to be within a range between 16384 and 16777215 inclusive, the actual payload size in frames that carry payload maybe be less than 16384.
Returns true on success, false otherwise.
See Also▲
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▲
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▲
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▲
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 214748364 octets (see RFC 7540).
See Also▲
See also setStreamReceiveWindowSize()
void QHttp2Configuration::swap(QHttp2Configuration &other)▲
Swaps this configuration with the other configuration.
QHttp2Configuration &QHttp2Configuration::operator=(const QHttp2Configuration &other)▲
Copy-assigns other to this QHttp2Configuration.
QHttp2Configuration &QHttp2Configuration::operator=(QHttp2Configuration &&other)▲
Move-assigns other to this QHttp2Configuration.
Related Non-Members▲
bool operator!=(const QHttp2Configuration &lhs, const QHttp2Configuration &rhs)▲
Returns true if lhs and rhs do not have the same set of HTTP/2 parameters.
bool operator==(const QHttp2Configuration &lhs, const QHttp2Configuration &rhs)▲
Returns true if lhs and rhs have the same set of HTTP/2 parameters.