How can I use Ruby to check for a domain?

Question

Something along the lines of:

def domain_exists?(domain) # perform check # return true|false end puts "valid!" if domain_exists?("example.com") 

Answer 1

If you want to check if a domain is registered or not, you need to fulfill the Whois request. http://www.ruby-whois.org/

Answer 2

 require 'socket' def domain_exists?(domain) begin Socket.gethostbyname(domain) rescue SocketError return false end true end 

Answer 3

With ruby-whois is pretty easy:

Set the gem and demand.

a = Whois.whois ("google.com")

a.available? => false

CLI is also included if you install it using ruby ​​stones: ruby-whois

on page: ruby-whois.org

Answer 4

You can execute the nslookup command as follows:

 `nslookup #{domain}` 

and analyze the results as regular expression text, etc.

Or you can use the Socket class, in particular Socket.getaddrinfo. See StackOverflow 's previous answer on this very question.