title: Install ruby gems offline / proxy configuration
body: <p>I need to install ruby on rails + Nokogiri, httparty, json [and some less significant gems] on server which does not have connection to internet. How it could be done?</p>
  
  <p>host operating system is windows </p>
  
  <p>Additional question, well, it is not very good for me, since it can takes some days, but I can as customer to give this server access to the http proxy. However I must confess, that I already tried to use somethin like that</p>
  
  <pre><code>set http_proxy="http://username:password@host:port"
  </code></pre>
  
  <p>or</p>
  
  <pre><code>gem --http_proxy "http://username:password@host:port"
  </code></pre>
  
  <p>but in both cases was not able to access the gem store :(</p>