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)
}