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Correct cache behavior

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风扇滑翔翼 2024-09-15 07:37:56 +00:00 committed by GitHub
parent d2e79c281d
commit 83cffab45f
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GPG Key ID: B5690EEEBB952194
1 changed files with 4 additions and 3 deletions
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7
transport/internet/tls/ech.go
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@ -52,18 +52,19 @@ var (
) )
func QueryRecord(domain string, server string) (string, error) { func QueryRecord(domain string, server string) (string, error) {
mutex.RLock()
defer mutex.RUnlock()
rec, found := dnsCache[domain] rec, found := dnsCache[domain]
if found && rec.expire.After(time.Now()) { if found && rec.expire.After(time.Now()) {
return "", nil return rec.record, nil
} }
mutex.Lock()
defer mutex.Unlock()
record, err := dohQuery(server, domain) record, err := dohQuery(server, domain)
if err != nil { if err != nil {
return "", err return "", err
} }
rec.record = record rec.record = record
rec.expire = time.Now().Add(time.Second * 600) rec.expire = time.Now().Add(time.Second * 600)
dnsCache[domain] = rec
return record, nil return record, nil
} }