Add --insecure flag to LinkDomain to disable default HTTPS redirect.

README.md

@@ -164,9 +164,11 @@ valar domains verify [domain]
 
 #### Link a domain to a service
 ```bash
-valar domains link [domain] ([service])
+valar domains link [--insecure] [domain] ([service])
 ```
 
+> If `--insecure` is enabled, the default HTTP-to-HTTPS redirection handler will be disabled and any plaintext HTTP requests will be forwarded to your service.
+
 #### Unlink a domain from a service
 ```bash
 valar domains unlink [domain] ([service])

cmd/domains.go

@@ -134,8 +134,10 @@ var domainsVerifyCmd = &cobra.Command{
 	}),
 }
 
+var domainsLinkAllowInsecureTraffic bool
+
 var domainsLinkCmd = &cobra.Command{
-	Use:   "link [domain] ([service])",
+	Use:   "link [--insecure] [domain] ([service])",
 	Short: "Link a domain to a service",
 	Args:  cobra.RangeArgs(1, 2),
 	Run: runAndHandle(func(cmd *cobra.Command, args []string) error {
@@ -160,7 +162,7 @@ var domainsLinkCmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
-		return client.LinkDomain(project, args[0], svc)
+		return client.LinkDomain(project, args[0], svc, domainsLinkAllowInsecureTraffic)
 	}),
 }
 
@@ -195,6 +197,7 @@ var domainsUnlinkCmd = &cobra.Command{
 }
 
 func initDomainsCmd() {
+	domainsLinkCmd.Flags().BoolVarP(&domainsLinkAllowInsecureTraffic, "insecure", "i", false, "Allow insecure traffic to the service. Disables the default HTTPS redirect for this domain.")
 	domainsCmd.AddCommand(domainsAddCmd)
 	domainsCmd.AddCommand(domainsVerifyCmd)
 	domainsCmd.AddCommand(domainsLinkCmd)

pkg/api/client.go

@@ -334,12 +334,16 @@ func (client *Client) DeleteDomain(project, domain string) error {
 	return nil
 }
 
-func (client *Client) LinkDomain(project, domain, service string) error {
+func (client *Client) LinkDomain(project, domain, service string, allowInsecureTraffic bool) error {
 	var (
 		path       = fmt.Sprintf("/projects/%s/domains/%s/link", project, domain)
 		payload, _ = json.Marshal(struct {
-			Service string `json:"service"`
-		}{service})
+			Service              string `json:"service"`
+			AllowInsecureTraffic bool   `json:"allowInsecureTraffic"`
+		}{
+			Service:              service,
+			AllowInsecureTraffic: allowInsecureTraffic,
+		})
 	)
 	if err := client.request(http.MethodPost, path, nil, bytes.NewReader(payload)); err != nil {
 		return err