Golang : Find IP address from string
In this short tutorial, we will learn how to get the first occurrence of an IP address in a given string by searching for a matching pattern with regular expression.
package main
import (
"fmt"
"regexp"
)
func findIP(input string) string {
numBlock := "(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])"
regexPattern := numBlock + "\\." + numBlock + "\\." + numBlock + "\\." + numBlock
regEx := regexp.MustCompile(regexPattern)
return regEx.FindString(input)
}
func main() {
var ip string
str := "this is a string that contain IP address 192.168.0.1 and you need to parse it"
ip = findIP(str)
fmt.Printf("The IP address in string is %q \n", ip)
}
Output :
go run parseipfromstring.go
The IP address in string is "192.168.0.1"
See also : Get client IP Address in Go
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+5.6k Elasticsearch : Shutdown a local node
+11.1k Golang : calculate elapsed run time
+15.1k Golang :Trim white spaces from a string
+6.1k Javascript : How to get JSON data from another website with JQuery or Ajax ?
+5.3k Golang : How to get capacity of a slice or array?
+4k HTTP common errors and their meaning explained
+23.7k Golang : Get current file path of a file or executable
+27.2k Golang : Detect (OS) Operating System
+7.1k Golang : Oanda bot with Telegram and RSI example
+23.4k Golang : Change file read or write permission example
+4.7k Linux/Unix/PHP : Restart PHP-FPM
+4.4k Golang : Reclaim memory occupied by make() example