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logging.go
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logging.go
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package dav
import (
"log/slog"
"net/http"
"time"
)
var _ http.ResponseWriter = &loggingWriter{}
type loggingWriter struct {
writer http.ResponseWriter
writeErr error
n int
statusCode int
}
func (w *loggingWriter) Header() http.Header {
return w.writer.Header()
}
func (w *loggingWriter) Write(bytes []byte) (int, error) {
n, err := w.writer.Write(bytes)
w.n += n
if err != nil {
w.writeErr = err
}
return n, err
}
func (w *loggingWriter) WriteHeader(statusCode int) {
w.writer.WriteHeader(statusCode)
w.statusCode = statusCode
}
var _ http.Handler = &loggingHandler{}
type loggingHandler struct {
logger *slog.Logger
next http.Handler
}
func (h *loggingHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
start := time.Now()
w := &loggingWriter{
writer: writer,
}
h.next.ServeHTTP(w, request)
h.logger.DebugContext(request.Context(), "HTTP request done",
"method", request.Method,
"url", request.URL.String(),
"response_bytes", w.n,
"response_status_code", w.statusCode,
"response_error", w.writeErr,
"took_us", time.Since(start).Microseconds())
}