netutil

Documentation

Index

• Constants
• func ClientIP(r *http.Request) string
• func FreePort() (port int, err error)
• func GetHost(addr string) string
• func GetIP(addr string) string
• func GetPort(addr string) string
• func IP() string
• func IPTail() string

Constants

const EmptyIP = "0.0.0.0"

Functions

func ClientIP

func ClientIP(r *http.Request) string

ClientIP implements a best effort algorithm to return the real client IP, it parses X-Real-IP and X-Forwarded-For in order to work properly with reverse-proxies such us: nginx or haproxy.

func FreePort

func FreePort() (port int, err error)

FreePort returns an address of TCP free port from the kernel.

func GetHost

func GetHost(addr string) string

GetHost returns ip from addr that real client IP like '127.0.0.1:80'

func GetIP

func GetIP(addr string) string

GetIP same as GetHost

func GetPort

func GetPort(addr string) string

GetHost returns port from addr that real client IP like '127.0.0.1:80'

func IP

func IP() string

IP returns the current IP address.

func IPTail

func IPTail() string

IPTail returns the end of the current IP address. like: 4 in 192.168.1.4