54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package logger
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import (
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"bufio"
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"errors"
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"net"
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"net/http"
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)
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var (
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errWriterNotImplentsHijacker = errors.New("ResponseWriter does not implement the Hijacker interface")
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)
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type trackingResponseWriter struct {
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http.ResponseWriter
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size int
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status int
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}
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func newTrackingResponseWriter(w http.ResponseWriter) *trackingResponseWriter {
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return &trackingResponseWriter{ResponseWriter: w, status: 200}
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}
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// WriteHeader implements http.ResponseWriter and saves status
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func (s *trackingResponseWriter) WriteHeader(status int) {
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s.status = status
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s.ResponseWriter.WriteHeader(status)
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}
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// Write implements http.ResponseWriter and tracks number of bytes written
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func (s *trackingResponseWriter) Write(b []byte) (int, error) {
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size, err := s.ResponseWriter.Write(b)
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s.size += size
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return size, err
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}
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// Flush implements http.Flusher
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func (s *trackingResponseWriter) Flush() {
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if f, ok := s.ResponseWriter.(http.Flusher); ok {
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f.Flush()
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}
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}
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// Hijack implements http.Hijacker
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func (s *trackingResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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if hj, ok := s.ResponseWriter.(http.Hijacker); ok {
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return hj.Hijack()
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}
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return nil, nil, errWriterNotImplentsHijacker
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}
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