traefik/pkg/middlewares/metrics/recorder.go
2019-09-30 14:42:04 +02:00

39 lines
962 B
Go

package metrics
import (
"bufio"
"net"
"net/http"
)
// responseRecorder captures information from the response and preserves it for
// later analysis.
type responseRecorder struct {
http.ResponseWriter
statusCode int
}
// WriteHeader captures the status code for later retrieval.
func (r *responseRecorder) WriteHeader(status int) {
r.ResponseWriter.WriteHeader(status)
r.statusCode = status
}
// Hijack hijacks the connection
func (r *responseRecorder) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return r.ResponseWriter.(http.Hijacker).Hijack()
}
// CloseNotify returns a channel that receives at most a
// single value (true) when the client connection has gone
// away.
func (r *responseRecorder) CloseNotify() <-chan bool {
return r.ResponseWriter.(http.CloseNotifier).CloseNotify()
}
// Flush sends any buffered data to the client.
func (r *responseRecorder) Flush() {
if f, ok := r.ResponseWriter.(http.Flusher); ok {
f.Flush()
}
}