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New in version: 8.2 8.3 8.4 8.5 9.0 9.1 9.2 9.3 9.4 9.5 Statistic
Perform any connection upkeep checks.
|Component||Version||macOS||Windows||Server||FileMaker Cloud||FileMaker iOS SDK|
|curl||The CURL session handle.||$curl|
Returns OK or error.
DescriptionPerform any connection upkeep checks.
Some protocols have "connection upkeep" mechanisms. These mechanisms usually send some traffic on existing connections in order to keep them alive; this can prevent connections from being closed due to overzealous firewalls, for example.
Currently the only protocol with a connection upkeep mechanism is HTTP/2: when the connection upkeep interval is exceeded and CURL.Upkeep is called, an HTTP/2 PING frame is sent on the connection.
This function must be explicitly called in order to perform the upkeep work. The connection upkeep interval is set with CURL.SetOptionUpkeepIntervalMS.
- Version 8.5
Created 31st October 2018, last changed 31st October 2018
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