如何使用Ruby检查域是否存在？

Something along the lines of:

有点像：

def domain_exists?(domain)
  # perform check
  # return true|false
end

puts "valid!" if domain_exists?("example.com")

4 个解决方案

#1

If you want to check whether a domain is registered or not, then you need to perform a Whois query. http://www.ruby-whois.org/

如果要检查域是否已注册，则需要执行Whois查询。 http://www.ruby-whois.org/

#2

require 'socket'

def domain_exists?(domain)
  begin
    Socket.gethostbyname(domain)
  rescue SocketError
    return false
  end

  true
end

#3

With ruby-whois is pretty easy:

ruby-whois非常简单：

Install gem and require.

安装gem和require。

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

a = Whois.whois（“google.com”）

a.available? => false

a.available？ =>假

There is also a CLI bundled if you install it via ruby gems: ruby-whois

如果您通过ruby gems安装它，还会捆绑一个CLI：ruby-whois

web page at: ruby-whois.org

网页：ruby-whois.org

#4

You could shell out to nslookup like this:

你可以像这样向nslookup发送shell：

`nslookup #{domain}`

and parse the results as text with regexes etc.

并使用正则表达式将结果解析为文本等。

Or you can use the Socket class, specifically Socket.getaddrinfo. See previous * answer on this very question.

或者您可以使用Socket类，特别是Socket.getaddrinfo。有关此问题，请参阅之前的*答案。

#1