libnmdc: add default protocol/port if not present

src/libnmdc/libnmdc.go

@@ -16,14 +16,31 @@ type HubEventType int
 
 type HubAddress string
 
+func (this *HubAddress) parse() url.URL {
+	parsed, err := url.Parse(strings.ToLower(string(*this)))
+	if err != nil || len(parsed.Host) == 0 {
+		parsed = &url.URL{
+			Scheme: "nmdc",
+			Host:   string(*this),
+		}
+	}
+
+	// Add default port if not specified
+	if !strings.ContainsRune(parsed.Host, ':') {
+		parsed.Host = parsed.Host + ":411"
+	}
+
+	return *parsed
+}
+
 func (this *HubAddress) IsSecure() bool {
-	parsed, _ := url.Parse(strings.ToLower(string(*this)))
+	parsed := this.parse()
+
 	return parsed.Scheme == "nmdcs" || parsed.Scheme == "dchubs"
 }
 
 func (this *HubAddress) GetHostOnly() string {
-	parsed, _ := url.Parse(strings.ToLower(string(*this)))
-	return parsed.Host
+	return this.parse().Host
 }
 
 const (