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redis.go
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/
redis.go
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package redis
import (
"context"
"encoding/json"
"errors"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/fall"
"github.com/coredns/coredns/plugin/pkg/upstream"
"github.com/coredns/coredns/request"
redisV8 "github.com/go-redis/redis/v8"
"github.com/miekg/dns"
)
type Redis struct {
Next plugin.Handler
Client redisV8.UniversalClient
KeyPrefix string
Zones []string
Fall fall.F
Upstream *upstream.Upstream
}
func (r *Redis) get(ctx context.Context, key, field string) (val string, err error) {
val, err = r.Client.HGet(ctx, key, field).Result()
// if err == redisV8.Nil {
// val, err = r.Client.HGet(ctx, AnyKey(key), field).Result()
// }
if err == redisV8.Nil {
err = errKeyNotFound
}
return
}
func (r *Redis) cnameGet(ctx context.Context, key string) (rCNAME RecordCNANE, err error) {
val, err := r.get(ctx, key, dns.Type(dns.TypeCNAME).String())
if err != nil {
return nil, err
}
err = json.Unmarshal([]byte(val), &rCNAME)
if err != nil {
return nil, err
}
return
}
func (r *Redis) Lookup(ctx context.Context, state request.Request, name string) (*dns.Msg, error) {
return r.Upstream.Lookup(ctx, state, name, state.QType())
}
var errKeyNotFound = errors.New("key not found")
// MinTTL returns the minimal TTL.
func (*Redis) MinTTL(state request.Request) uint32 {
return 30
}