// makeEndpointURL constructs a URL by determining the private IP address of
// the host.
func makeEndpointURL(listenIP string, listenPort int) (string, error) {
if listenIP != "0.0.0.0" {
return fmt.Sprintf("http://%v:%v", listenIP, listenPort), nil
}
privateIPs, err := iptools.GetPrivateHostIPs()
if err != nil {
return "", fmt.Errorf("failed to obtain host's private IPs: %v", err)
}
if len(privateIPs) == 0 {
return "", errors.New("no host's private IPs are found")
}
return fmt.Sprintf("http://%v:%v", privateIPs[0], listenPort), nil
}
// Construct an endpoint URL by determining the private IP address of the host.
func makeEndpointURL(listenIP string, listenPort int) (string, error) {
// if an app is listening on a specific IP, use it
if listenIP != "0.0.0.0" {
return fmt.Sprintf("http://%v:%v", listenIP, listenPort), nil
}
// otherwise find a private IP
privateIPs, err := iptools.GetPrivateHostIPs()
if err != nil {
return "", fmt.Errorf("failed to obtain host's private IPs: %v", err)
}
if len(privateIPs) == 0 {
return "", fmt.Errorf("no host's private IPs are found")
}
return fmt.Sprintf("http://%v:%v", privateIPs[0], listenPort), nil
}