How to Get the Ip Address of My Local MAChine in Ruby

How to get the IP address of my local machine in Ruby?

Use Socket::ip_address_list.

Socket.ip_address_list #=> Array of AddrInfo

Get own IP address

Try:

require 'socket'
ip=Socket.ip_address_list.detect{|intf| intf.ipv4_private?}
ip.ip_address if ip

Ruby: get local IP (nix)

A server typically has more than one interface, at least one private and one public.

Since all the answers here deal with this simple scenario, a cleaner way is to ask Socket for the current ip_address_list() as in:

require 'socket'

def my_first_private_ipv4
  Socket.ip_address_list.detect{|intf| intf.ipv4_private?}
end

def my_first_public_ipv4
  Socket.ip_address_list.detect{|intf| intf.ipv4? and !intf.ipv4_loopback? and !intf.ipv4_multicast? and !intf.ipv4_private?}
end

Both returns an Addrinfo object, so if you need a string you can use the ip_address() method, as in:

ip= my_first_public_ipv4.ip_address unless my_first_public_ipv4.nil?

You can easily work out the more suitable solution to your case changing Addrinfo methods used to filter the required interface address.

Get real IP address in local Rails development environment

As far as I can see there is no standard method for getting the remote address of your local machine. If you need the remote address for (testing) your geocoding, I suggest adding 127.0.0.1 to your database table that matches IP addresses with locations.

As a last resort you could also hard code your remote address. E.g. like this:

class ApplicationController < ActionController::Base
  def remote_ip
    if request.remote_ip == '127.0.0.1'
      # Hard coded remote address
      '123.45.67.89'
    else
      request.remote_ip
    end
  end
end

class MyController < ApplicationController
  def index
    @client_ip = remote_ip()
  end
end

Getting the Hostname or IP in Ruby on Rails

From coderrr.wordpress.com:

require 'socket'

def local_ip
  orig, Socket.do_not_reverse_lookup = Socket.do_not_reverse_lookup, true  # turn off reverse DNS resolution temporarily

  UDPSocket.open do |s|
    s.connect '64.233.187.99', 1
    s.addr.last
  end
ensure
  Socket.do_not_reverse_lookup = orig
end

# irb:0> local_ip
# => "192.168.0.127"

To get IP addres of the specific host machine in rub

publish_vm = node['aem_dispatcher_cookbook']['publish'].to_s
  ruby_block 'get_ip_from_publish' do
    block do
      Chef::Resource::RubyBlock.send(:include, Chef::Mixin::ShellOut)
      command1 = "nslookup #{publish_vm} |grep '^Address' | awk '{print $2}'| tail -1"
      command_out = shell_out(command1)
      node.run_state['master_ip'] = command_out.stdout
    end
    action :run
  end

This piece of code helped me to get ip address of desired host machine

how to get ip address in rails

To use a development host's external IP address rather than the "localhost" address or loopback address of 127.0.0.1, explicitly bind to the host's external IP address. By default servers may listen on 0.0.0.0 (any address) and the localhost address ends up being used when testing on the same host as the development host.

To bind explicitly using web brick for example:

rails server -b my.real.ip.address

To bind explicitly using apache/passenger or similar, in the apache config use:

Listen my.real.ip.address:port

Get public (remote) IP address

Akamai provides a "What is my IP" page that you can fetch:

require 'open-uri'
remote_ip = open('http://whatismyip.akamai.com').read

There are a few alternatives that do the same thing, though:

• http://whatismyip.akamai.com
• http://ipecho.net/plain
• http://icanhazip.com
• http://ident.me
• http://bot.whatismyipaddress.com

You can also use the ipv4 and ipv6 subdomains with icanhazip.com.

If you don't want to depend on a third party, you can roll your own in a one-line rack app and deploy this for free on Heroku or whatever. It takes into account that X-Forwarded-For may contain a comma separated list of proxy IP addresses and only returns the client IP.

# config.ru

run lambda { |env|
  remote_ip = env['HTTP_X_FORWARDED_FOR'] || env['REMOTE_ADDR']
  remote_ip = remote_ip.scan(/[\d.]+/).first
  [200, {'Content-Type'=>'text/plain'}, [remote_ip]] 
}

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