Golang : Whois examples

Whois a network utility to find out "who is" the owner behind a domain name. Some owners will display all the private information such as personal home address, mobile/cell phone numbers and while some will choose to protect their privacy. Here are couple of examples on how to implement whois query in Golang.

Example 1:

 package main

 import (
 "fmt"
 "net"
 )

 func whois(domainName, server string) string {
 conn, err := net.Dial("tcp", server+":43")

 if err != nil {
 fmt.Println("Error")
 }

 defer conn.Close()

 conn.Write([]byte(domainName + "\r\n"))

 buf := make([]byte, 1024)

 result := []byte{}

 for {
 numBytes, err := conn.Read(buf)
 sbuf := buf[0:numBytes]
 result = append(result, sbuf...)
 if err != nil {
 break
 }
 }

 return string(result)
 }

 func main() {
 result := whois("socketloop.com", "com.whois-servers.net")
 fmt.Println(result)
 }

Example 2:

 package main

 import (
 "fmt"
 "github.com/likexian/whois-go"
 )

 func main() {
 result, err := whois.Whois("socketloop.com")

 if err != nil {
 fmt.Println(err)
 }

 fmt.Println(result)
 }

References :

https://github.com/likexian/whois-go

http://www.nirsoft.net/whoisserverslist.html