dial tcp 127.0.0.1:9200: connectex: Only one usage of each socket address (protocol/network address/port) is normally permitted.

[RoRui]

window10

func New() *elasticsearch.Client {
	cfg := elasticsearch.Config{
		Addresses: []string{
			"https://127.0.0.1:9200",
		},
		Username:               "elastic",
		Password:               "aaaaaaaa",
		CertificateFingerprint: "aaaaaaa",
	}
	es, err := elasticsearch.NewClient(cfg)
	if err != nil {
		log.Fatal(err)
	}
	return es
}

var es = conn.New()
func SaveUrl(r *colly.Response) {
	doc := UrlDoc{}
	doc._id = utils.GetMD5Encode(r.Request.URL.String())
	doc.Url = r.Request.URL.String()
	doc.Code = r.StatusCode
	data, _ := json.Marshal(doc)
	rp, err := es.Index("collected_urls", bytes.NewReader(data), es.Index.WithDocumentID(doc._id))
	if err != nil {
		log.Fatal(err)
	}
	log.Println(rp.String())	
	defer func(Body io.ReadCloser) {
		err := Body.Close()
		if err != nil {
			log.Fatal(err)
		}
	}(rp.Body)
}