Running an HTTP/2 client over TLS (over TCP). ALPN is "h2".

Running an HTTP/2 client over TCP.

Server type. Server takes a HTTP request, should generate a HTTP response and push promises, then should give them to the sending function. The sending function would throw exceptions so that they can be logged.

Either a host name e.g., "haskell.org" or a numeric host address string consisting of a dotted decimal IPv4 address or an IPv6 address e.g., "192.168.0.1".

Port number. Use the Num instance (i.e. use a literal) to create a PortNumber value.

>>> 1 :: PortNumber
1
>>> read "1" :: PortNumber
1
>>> show (12345 :: PortNumber)
"12345"
>>> 50000 < (51000 :: PortNumber)
True
>>> 50000 < (52000 :: PortNumber)
True
>>> 50000 + (10000 :: PortNumber)
60000

Running a TLS client. IOBackend provides sending and receiving functions with timeout based on Settings.

Default settings.

Timeout in seconds. (All)

>>> settingsTimeout defaultSettings
30

Send buffer size. (H2 and H2c)

>>> settingsSendBufferSize defaultSettings
4096

If the size of receiving data is less than or equal, the timeout is not reset. (All)

>>> settingsSlowlorisSize defaultSettings
50

When the size of a read buffer is lower than this limit, the buffer is thrown awany (and is eventually freed). Then a new buffer is allocated. (All)

>>> settingsReadBufferSize defaultSettings
16384

The allocation size for a read buffer. (All)

>>> settingsReadBufferLowerLimit defaultSettings
2048

Key logger.

Applications may wish to set this depending on the SSLKEYLOGFILE environment variable. The default is do nothing.

Default: do nothing

The number of workers. (H2 and H2c)

>>> settingsNumberOfWorkers defaultSettings
8

The maximum number of incoming streams on the net (H2 and H2c)

>>> settingsConcurrentStreams defaultSettings
64

The window size of a connection (H2 and H2c)

>>> settingsConnectionWindowSize defaultSettings
1048575

The window size of incoming streams (H2 and H2c)

>>> settingsStreamWindowSize defaultSettings
262144

TLS session manager (H2 and TLS)

Default: noSessionManager

Function to initialize the server socket (All)

Default: openServerSocket

The max size of early data (0-RTT) to be accepted. (H2 and TLS) 0 means that early data is not accepted.

>>> settingsEarlyDataSize defaultSettings
0

Sending and receiving functions. Tiemout is reset when they return. One exception is the slowloris attach prevention. See settingsSlowlorisSize.

Sending.

Sending many.

Receiving.