Setup Sunspot and Websolr with authentication

sunspot.rb

# put this file in config/initializers

require 'openssl'

class RSolrWithWebsolrAuth

  attr_reader :secret

  def initialize(secret)
    @secret = secret
  end

  def connect(opts = {})
    RSolr::Client.new(AuthenticatedConnection.new(secret), opts)
  end

  class AuthenticatedConnection < ::RSolr::Connection

    attr_reader :secret

    def initialize(secret)
      @secret = secret
    end

    def auth_headers
      time  = Time.now.to_i
      nonce = Time.now.to_i.to_s.split(//).sort_by{rand}.join
      auth  = OpenSSL::HMAC.hexdigest('sha1', secret, "#{time}#{nonce}")
      {
        'X-Websolr-Time'  => time.to_s,
        'X-Websolr-Nonce' => nonce,
        'X-Websolr-Auth'  => auth
      }
    end

    def setup_raw_request(request_context)
      request_context[:headers] ||= {}
      request_context[:headers].merge!(auth_headers)
      super(request_context)
    end
  end
end

if Rails.env.production? || Rails.env.staging?
  Sunspot::Session.connection_class = RSolrWithWebsolrAuth.new(ENV['WEBSOLR_SECRET'])
end

This worked for me. Thanks!