Files
anubis-mirror/lib/logging/stdlib.go
Xe Iaso a7a5e0d5c7 feat(lib): add log filtering rules
Closes #942

Signed-off-by: Xe Iaso <me@xeiaso.net>
2025-09-12 16:51:36 +00:00

37 lines
936 B
Go

package logging
import (
"bytes"
"context"
"log"
"log/slog"
"time"
)
// handlerWriter is an io.Writer that calls a Handler.
// It is used to link the default log.Logger to the default slog.Logger.
//
// Adapted from https://cs.opensource.google/go/go/+/refs/tags/go1.24.5:src/log/slog/logger.go;l=62
type handlerWriter struct {
h slog.Handler
level slog.Leveler
}
func (w *handlerWriter) Write(buf []byte) (int, error) {
level := w.level.Level()
if !w.h.Enabled(context.Background(), level) {
return 0, nil
}
var pc uintptr
// Remove final newline.
origLen := len(buf) // Report that the entire buf was written.
buf = bytes.TrimSuffix(buf, []byte{'\n'})
r := slog.NewRecord(time.Now(), level, string(buf), pc)
return origLen, w.h.Handle(context.Background(), r)
}
func StdlibLogger(next slog.Handler, level slog.Level) *log.Logger {
return log.New(&handlerWriter{h: next, level: level}, "", log.LstdFlags)
}