kubernetes/vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go

type middleware …

func defaultHandlerFormatter(operation string, _ *http.Request) string { … }

// NewHandler wraps the passed handler in a span named after the operation and
// enriches it with metrics.
func NewHandler(handler http.Handler, operation string, opts ...Option) http.Handler { … }

// NewMiddleware returns a tracing and metrics instrumentation middleware.
// The handler returned by the middleware wraps a handler
// in a span named after the operation and enriches it with metrics.
func NewMiddleware(operation string, opts ...Option) func(http.Handler) http.Handler { … }

func (h *middleware) configure(c *config) { … }

func handleErr(err error) { … }

func (h *middleware) createMeasures() { … }

// serveHTTP sets up tracing and calls the given next http.Handler with the span
// context injected into the request context.
func (h *middleware) serveHTTP(w http.ResponseWriter, r *http.Request, next http.Handler) { … }

// WithRouteTag annotates spans and metrics with the provided route name
// with HTTP route attribute.
func WithRouteTag(route string, h http.Handler) http.Handler { … }