Parsing Domain Names ("providers")

provider.js

    // from:
    // http://www.webtalkforums.com/showthread.php/37600-Simple-JavaScript-RegEx-to-Parse-Domain-Name
    var parts = /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/.exec(item['url'])
    if (parts != null) {
      providerUrl = parts[1] + parts[6];
      providerName = parts[6].replace("www.", "");
    } else {
      // Graceful fail
      //console.debug("Failed URL parsing on: " + item['url']);
      providerUrl = item['url'];
      providerName = providerUrl.replace('http://', '').replace('https://', '').replace('www.', '');
    }

provider.rb

  # Parse default Provider Name and URL from url  
  def get_default_link_provider( url )
    parts = url.split( /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/ )
    
    if parts && parts.length >= 4
      
      # Remove "www." from "www.provider_name.com"
      provider_name = parts[3].gsub( /www./, "" )
      
      # Concatenate "http://" and "www.provider_name.com"
      provider_url = parts[1] + parts[3]
      
    else
      # Fail gracefully
      provider_url = url
      provider_name = url.gsub( /http:\/\//, '' ).gsub( /https:\/\//, '' ).gsub( /www./, '' )
    end
    
    { :provider_name => provider_name, :provider_url => provider_url }
  end