dnscache

Documentation

Overview

Package dnscache exports DNS caching utilities for http.DialContexts.

Index

• func DialContext(ttl int) func(context.Context, string, string) (net.Conn, error)
• func Disable()
• func Enable(ttl int)

Functions

func DialContext

func DialContext(ttl int) func(context.Context, string, string) (net.Conn, error)

DialContext returns an http.DialContext with DNS caching. Cached DNS entries are refreshed by a ticker, with the given TTL as the number of seconds to wait before refreshing the cache.

func Disable

func Disable()

Disable resets the default dial context back to http.Transport's DialContext.

func Enable

func Enable(ttl int)

Enable adds caching to DNS lookups, performed by the standard library's http.DefaultTransport. TTL in this case doesn't truly mean TTL for an address; rather, it determines the number of seconds to use for the cache refresh interval.