pkg/provider/main.go

@@ -138,7 +138,15 @@ func (p *provider) retrieveSubdomainIP(addr string) (string, error) {
 		return "", fmt.Errorf("%v: %v", utils.ErrIpLenght, ips)
 	}
 
-	return ips[0].String(), nil
+	ip := ips[0].String()
+	if strings.Contains(ip, ":") {
+		ip, _, err = net.SplitHostPort(ip)
+		if err != nil {
+			return "", fmt.Errorf("%v: %v", utils.ErrSplitAddr, ip)
+		}
+	}
+
+	return ip, nil
 }
 
 func (p *provider) checkResponse(body []byte, tokenBased bool, ip string) error {

pkg/watcher/watcher.go

@@ -120,7 +120,7 @@ func (w *watcher) retrieveServerIP() (string, error) {
 	}
 
 	var ip string
-	if strings.Contains(rsp.Header.Get("content-type"), "application/json") {
+	if rsp.Header.Get("content-type") == "application/json" {
 		body := make(map[string]interface{})
 		if err := json.Unmarshal(b, &body); err != nil {
 			return "", fmt.Errorf("failed to unmarshal JSON body: %v", err)