32 lines
539 B
Go
32 lines
539 B
Go
package dht
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import (
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"sync"
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"time"
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"github.com/rs/dnscache"
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)
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var (
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// A cache to prevent wasteful/excessive use of DNS when trying to bootstrap.
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dnsResolver *dnscache.Resolver
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dnsResolverInit sync.Once
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)
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func dnsResolverRefresher() {
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ticker := time.NewTicker(5 * time.Minute)
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defer ticker.Stop()
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for {
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<-ticker.C
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dnsResolver.Refresh(false)
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}
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}
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// https://github.com/anacrolix/dht/issues/43
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func initDnsResolver() {
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dnsResolverInit.Do(func() {
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dnsResolver = &dnscache.Resolver{}
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go dnsResolverRefresher()
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})
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}
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