Support rancher client config (#802)

shared/kubernetes/proxy.go

@@ -128,9 +128,14 @@ func getHttpDialer(kubernetesProvider *Provider, namespace string, podName strin
 		return nil, err
 	}
 
-	path := fmt.Sprintf("/api/v1/namespaces/%s/pods/%s/portforward", namespace, podName)
-	hostIP := strings.TrimLeft(kubernetesProvider.clientConfig.Host, "htps:/") // no need specify "t" twice
-	serverURL := url.URL{Scheme: "https", Path: path, Host: hostIP}
+	clientConfigHostUrl, err := url.Parse(kubernetesProvider.clientConfig.Host)
+	if err != nil {
+		return nil, fmt.Errorf("Failed parsing client config host URL %s, error %w", kubernetesProvider.clientConfig.Host, err)
+	}
+	path := fmt.Sprintf("%s/api/v1/namespaces/%s/pods/%s/portforward", clientConfigHostUrl.Path, namespace, podName)
+
+	serverURL := url.URL{Scheme: "https", Path: path, Host: clientConfigHostUrl.Host}
+	logger.Log.Debugf("Http dialer url %v", serverURL)
 
 	return spdy.NewDialer(upgrader, &http.Client{Transport: roundTripper}, http.MethodPost, &serverURL), nil
 }