xnet

func GetTCPPort ¶

func GetTCPPort(address string) (int, error)

GetTCPPort gets a free TCP port for given address. When address is not provided (is empty), 127.0.0.1 is used.

func IsEmailAddress ¶

func IsEmailAddress(addr string) bool

IsEmailAddress returns whether addr is a valid email address. What is not supported as valid:

* quoted local-parts

* following allowed characters are not supported: ! $ % & ' * / = ? ^ ` { | }

func MustGetLocalhostTCPPort ¶

func MustGetLocalhostTCPPort() int

MustGetLocalhostTCPPort gets a free TCP port for IP 127.0.0.1. Panics when an error occurs.

func OutboundIP ¶

func OutboundIP() (net.IP, error)

OutboundIP retrieves the IP address with which the system is communicating with the internet.