class ActionDispatch::Routing::Redirect

def build_response(req)
  uri = URI.parse(path(req.path_parameters, req))
  unless uri.host
    if relative_path?(uri.path)
      uri.path = "#{req.script_name}/#{uri.path}"
    elsif uri.path.empty?
      uri.path = req.script_name.empty? ? "/" : req.script_name
    end
  end
  uri.scheme ||= req.scheme
  uri.host   ||= req.host
  uri.port   ||= req.port unless req.standard_port?
  req.commit_flash
  body = ""
  headers = {
    "Location" => uri.to_s,
    "Content-Type" => "text/html; charset=#{ActionDispatch::Response.default_charset}",
    "Content-Length" => body.length.to_s
  }
  ActionDispatch::Response.new(status, headers, body)
end

def call(env)
  ActiveSupport::Notifications.instrument("redirect.action_dispatch") do |payload|
    request = Request.new(env)
    response = build_response(request)
    payload[:status] = @status
    payload[:location] = response.headers["Location"]
    payload[:request] = request
    response.to_a
  end
end

def escape(params)
  params.transform_values { |v| Rack::Utils.escape(v) }
end

def escape_fragment(params)
  params.transform_values { |v| Journey::Router::Utils.escape_fragment(v) }
end

def escape_path(params)
  params.transform_values { |v| Journey::Router::Utils.escape_path(v) }
end

def initialize(status, block)
  @status = status
  @block  = block
end

def inspect
  "redirect(#{status})"
end

def path(params, request)
  block.call params, request
end

def redirect?; true; end

def relative_path?(path)
  path && !path.empty? && !path.start_with?("/")
end