Initial QSfera import

Server/vendor/github.com/lestrrat-go/httprc/v3/tracesink/tracesink.go

@@ -0,0 +1,52 @@
+package tracesink
+
+import (
+	"context"
+	"log/slog"
+)
+
+type Interface interface {
+	Put(context.Context, string)
+}
+
+// Nop is an ErrorSink that does nothing. It does not require
+// any initialization, so the zero value can be used.
+type Nop struct{}
+
+// NewNop returns a new NopTraceSink object. The constructor
+// is provided for consistency.
+func NewNop() Interface {
+	return Nop{}
+}
+
+// Put for NopTraceSink does nothing.
+func (Nop) Put(context.Context, string) {}
+
+type slogSink struct {
+	level  slog.Level
+	logger SlogLogger
+}
+
+type SlogLogger interface {
+	Log(context.Context, slog.Level, string, ...any)
+}
+
+// NewSlog returns a new ErrorSink that logs errors using the provided slog.Logger
+func NewSlog(l SlogLogger) Interface {
+	return &slogSink{
+		level:  slog.LevelInfo,
+		logger: l,
+	}
+}
+
+func (s *slogSink) Put(ctx context.Context, v string) {
+	s.logger.Log(ctx, s.level, v)
+}
+
+// Func is a TraceSink that calls a function with the trace message.
+type Func func(context.Context, string)
+
+// Put calls the function with the trace message.
+func (f Func) Put(ctx context.Context, msg string) {
+	f(ctx, msg)
+}