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CURL.SetOptionDNSCacheTimeout

Sets the DNS Cache Timeout in seconds.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
CURL 2.5 Yes Yes Yes Yes Yes

MBS( "CURL.SetOptionDNSCacheTimeout"; Handle; Value )

Parameters

Parameter Description Example value
Handle The CURL session handle. $curl
Value The new timeout in seconds. 60

Result

Returns "OK" on success.

Description

Sets the DNS Cache Timeout in seconds.
Name resolves will be kept in memory for this number of seconds. Set to zero to completely disable caching, or set to -1 to make the cached entries remain forever. By default, libcurl caches this info for 60 seconds.

The name resolve functions of various libc implementations don't re-read name server information unless explicitly told so (for example, by calling res_init(3)). This may cause libcurl to keep using the older server even if DHCP has updated the server info, and this may look like a DNS cache issue to the casual libcurl-app user.

CURL.SetOptionCustomRequest   -   CURL.SetOptionDNSInterface

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