1
0
mirror of https://github.com/containous/traefik.git synced 2024-12-22 13:34:03 +03:00
traefik/pkg/middlewares/metrics/recorder.go

64 lines
1.4 KiB
Go
Raw Normal View History

2019-07-18 22:36:05 +03:00
package metrics
import (
"bufio"
"net"
"net/http"
)
type recorder interface {
http.ResponseWriter
http.Flusher
getCode() int
}
func newResponseRecorder(rw http.ResponseWriter) recorder {
rec := &responseRecorder{
ResponseWriter: rw,
statusCode: http.StatusOK,
}
if _, ok := rw.(http.CloseNotifier); !ok {
return rec
}
return &responseRecorderWithCloseNotify{rec}
}
2019-07-18 22:36:05 +03:00
// responseRecorder captures information from the response and preserves it for
// later analysis.
type responseRecorder struct {
http.ResponseWriter
statusCode int
}
type responseRecorderWithCloseNotify struct {
*responseRecorder
}
// CloseNotify returns a channel that receives at most a
// single value (true) when the client connection has gone away.
func (r *responseRecorderWithCloseNotify) CloseNotify() <-chan bool {
return r.ResponseWriter.(http.CloseNotifier).CloseNotify()
}
func (r *responseRecorder) getCode() int {
return r.statusCode
}
2019-07-18 22:36:05 +03:00
// WriteHeader captures the status code for later retrieval.
func (r *responseRecorder) WriteHeader(status int) {
r.ResponseWriter.WriteHeader(status)
r.statusCode = status
}
2020-05-11 13:06:07 +03:00
// Hijack hijacks the connection.
2019-07-18 22:36:05 +03:00
func (r *responseRecorder) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return r.ResponseWriter.(http.Hijacker).Hijack()
}
// Flush sends any buffered data to the client.
func (r *responseRecorder) Flush() {
2019-09-30 15:42:04 +03:00
if f, ok := r.ResponseWriter.(http.Flusher); ok {
f.Flush()
}
2019-07-18 22:36:05 +03:00
}