package tracing import ( "fmt" "net/http" "github.com/containous/traefik/log" "github.com/opentracing/opentracing-go" "github.com/opentracing/opentracing-go/ext" "github.com/urfave/negroni" ) type entryPointMiddleware struct { entryPoint string *Tracing } // NewEntryPoint creates a new middleware that the incoming request func (t *Tracing) NewEntryPoint(name string) negroni.Handler { log.Debug("Added entrypoint tracing middleware") return &entryPointMiddleware{Tracing: t, entryPoint: name} } func (e *entryPointMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) { opNameFunc := func(r *http.Request) string { return fmt.Sprintf("Entrypoint %s %s", e.entryPoint, r.Host) } ctx, _ := e.Extract(opentracing.HTTPHeaders, opentracing.HTTPHeadersCarrier(r.Header)) span := e.StartSpan(opNameFunc(r), ext.RPCServerOption(ctx)) ext.Component.Set(span, e.ServiceName) LogRequest(span, r) ext.SpanKindRPCServer.Set(span) w = &statusCodeTracker{w, 200} r = r.WithContext(opentracing.ContextWithSpan(r.Context(), span)) next(w, r) LogResponseCode(span, w.(*statusCodeTracker).status) span.Finish() }