coredns/plugin/metrics/recorder.go
Ondřej Benkovský f713a51319
plugin/prometheus: write rcode properly to the metrics (#5126)
* plugin/prometheus: write rcode properly to the metrics

Signed-off-by: Ondřej Benkovský <ondrej.benkovsky@jamf.com>
2022-01-26 11:32:01 -05:00

28 lines
784 B
Go

package metrics
import (
"runtime"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/miekg/dns"
)
// Recorder is a dnstest.Recorder specific to the metrics plugin.
type Recorder struct {
*dnstest.Recorder
// CallerN holds the string return value of the call to runtime.Caller(N+1)
Caller [3]string
}
// NewRecorder makes and returns a new Recorder.
func NewRecorder(w dns.ResponseWriter) *Recorder { return &Recorder{Recorder: dnstest.NewRecorder(w)} }
// WriteMsg records the status code and calls the
// underlying ResponseWriter's WriteMsg method.
func (r *Recorder) WriteMsg(res *dns.Msg) error {
_, r.Caller[0], _, _ = runtime.Caller(1)
_, r.Caller[1], _, _ = runtime.Caller(2)
_, r.Caller[2], _, _ = runtime.Caller(3)
return r.Recorder.WriteMsg(res)
}