traefik/pkg/middlewares/tracing/status_code.go

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package tracing
import (
"bufio"
"net"
"net/http"
)
type statusCodeRecoder interface {
http.ResponseWriter
Status() int
}
type statusCodeWithoutCloseNotify struct {
http.ResponseWriter
status int
}
// WriteHeader captures the status code for later retrieval.
func (s *statusCodeWithoutCloseNotify) WriteHeader(status int) {
s.status = status
s.ResponseWriter.WriteHeader(status)
}
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// Status get response status.
func (s *statusCodeWithoutCloseNotify) Status() int {
return s.status
}
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// Hijack hijacks the connection.
func (s *statusCodeWithoutCloseNotify) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return s.ResponseWriter.(http.Hijacker).Hijack()
}
// Flush sends any buffered data to the client.
func (s *statusCodeWithoutCloseNotify) Flush() {
if flusher, ok := s.ResponseWriter.(http.Flusher); ok {
flusher.Flush()
}
}
type statusCodeWithCloseNotify struct {
*statusCodeWithoutCloseNotify
}
func (s *statusCodeWithCloseNotify) CloseNotify() <-chan bool {
return s.ResponseWriter.(http.CloseNotifier).CloseNotify()
}
// newStatusCodeRecoder returns an initialized statusCodeRecoder.
func newStatusCodeRecoder(rw http.ResponseWriter, status int) statusCodeRecoder {
recorder := &statusCodeWithoutCloseNotify{rw, status}
if _, ok := rw.(http.CloseNotifier); ok {
return &statusCodeWithCloseNotify{recorder}
}
return recorder
}