Beispiel #1
0
func ContextInjector(componentName string, handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		reqID := req.Header.Get("X-Request-ID")
		if reqID == "" {
			reqID = random.UUID()
		}
		ctx := ctxhelper.NewContextRequestID(context.Background(), reqID)
		ctx = ctxhelper.NewContextComponentName(ctx, componentName)
		rw := NewResponseWriter(w, ctx)
		handler.ServeHTTP(rw, req)
	})
}
func ExampleWithTimeout() {
	// Pass a context with a timeout to tell a blocking function that it
	// should abandon its work after the timeout elapses.
	ctx, _ := context.WithTimeout(context.Background(), 100*time.Millisecond)
	select {
	case <-time.After(200 * time.Millisecond):
		fmt.Println("overslept")
	case <-ctx.Done():
		fmt.Println(ctx.Err()) // prints "context deadline exceeded"
	}
	// Output:
	// context deadline exceeded
}