Function NewLoggingHandler

mcp/logging.go:102–123

NewLoggingHandler creates a [LoggingHandler] that logs to the given [ServerSession] using a [slog.JSONHandler].

(ss *ServerSession, opts *LoggingHandlerOptions)

// NewLoggingHandler creates a [LoggingHandler] that logs to the given [ServerSession] using a
// [slog.JSONHandler].
func NewLoggingHandler(ss *ServerSession, opts *LoggingHandlerOptions) *LoggingHandler {
	var buf bytes.Buffer
	jsonHandler := slog.NewJSONHandler(&buf, &slog.HandlerOptions{
		ReplaceAttr: func(_ []string, a slog.Attr) slog.Attr {
			// Remove level: it appears in LoggingMessageParams.
			if a.Key == slog.LevelKey {
				return slog.Attr{}
			}
			return a
		},
	})
	lh := &LoggingHandler{
		ss:      ss,
		mu:      new(sync.Mutex),
		buf:     &buf,
		handler: jsonHandler,
	}
	if opts != nil {
		lh.opts = *opts
	}
	return lh
}

// Enabled implements [slog.Handler.Enabled] by comparing level to the [ServerSession]'s level.
func (h *LoggingHandler) Enabled(ctx context.Context, level slog.Level) bool {