module Rack
  # Apache and others set HTTP_X_FORWARDED_HOST for proxied connections
  # This middleware detects it and makes it look like the HOST
  
  class XHost
    def initialize(app)
      @app = app
    end
    
    def call(env)
      env["HTTP_HOST"] = env["HTTP_X_FORWARDED_HOST"] if env["HTTP_X_FORWARDED_HOST"]
      @app.call(env)
    end
  end
end