84 lines
1.8 KiB
Go
84 lines
1.8 KiB
Go
package accesslog
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import (
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"bufio"
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"fmt"
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"net"
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"net/http"
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"github.com/traefik/traefik/v2/pkg/middlewares"
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)
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var _ middlewares.Stateful = &captureResponseWriterWithCloseNotify{}
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type capturer interface {
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http.ResponseWriter
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Size() int64
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Status() int
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}
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func newCaptureResponseWriter(rw http.ResponseWriter) capturer {
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capt := &captureResponseWriter{rw: rw}
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if _, ok := rw.(http.CloseNotifier); !ok {
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return capt
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}
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return &captureResponseWriterWithCloseNotify{capt}
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}
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// captureResponseWriter is a wrapper of type http.ResponseWriter
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// that tracks request status and size.
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type captureResponseWriter struct {
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rw http.ResponseWriter
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status int
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size int64
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}
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type captureResponseWriterWithCloseNotify struct {
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*captureResponseWriter
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}
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// CloseNotify returns a channel that receives at most a
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// single value (true) when the client connection has gone away.
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func (r *captureResponseWriterWithCloseNotify) CloseNotify() <-chan bool {
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return r.rw.(http.CloseNotifier).CloseNotify()
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}
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func (crw *captureResponseWriter) Header() http.Header {
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return crw.rw.Header()
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}
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func (crw *captureResponseWriter) Write(b []byte) (int, error) {
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if crw.status == 0 {
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crw.status = http.StatusOK
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}
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size, err := crw.rw.Write(b)
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crw.size += int64(size)
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return size, err
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}
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func (crw *captureResponseWriter) WriteHeader(s int) {
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crw.rw.WriteHeader(s)
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crw.status = s
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}
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func (crw *captureResponseWriter) Flush() {
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if f, ok := crw.rw.(http.Flusher); ok {
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f.Flush()
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}
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}
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func (crw *captureResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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if h, ok := crw.rw.(http.Hijacker); ok {
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return h.Hijack()
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}
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return nil, nil, fmt.Errorf("not a hijacker: %T", crw.rw)
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}
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func (crw *captureResponseWriter) Status() int {
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return crw.status
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}
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func (crw *captureResponseWriter) Size() int64 {
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return crw.size
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}
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