class WebMock::RackResponse

def body_from_rack_response(response)
  body = "".dup
  response.each { |line| body << line }
  response.close if response.respond_to?(:close)
  return body
end

def build_rack_env(request)
  uri = request.uri
  headers = (request.headers || {}).dup
  body = request.body || ''
  env = {
    # CGI variables specified by Rack
    'REQUEST_METHOD' => request.method.to_s.upcase,
    'CONTENT_TYPE'   => headers.delete('Content-Type'),
    'CONTENT_LENGTH' => body.bytesize,
    'PATH_INFO'      => uri.path,
    'QUERY_STRING'   => uri.query || '',
    'SERVER_NAME'    => uri.host,
    'SERVER_PORT'    => uri.port,
    'SCRIPT_NAME'    => ""
  }
  env['HTTP_AUTHORIZATION'] = 'Basic ' + [uri.userinfo].pack('m').delete("\r\n") if uri.userinfo
  # Rack-specific variables
  env['rack.input']      = StringIO.new(body)
  env['rack.errors']     = $stderr
  if !Rack.const_defined?(:RELEASE) || Rack::RELEASE < "3"
    env['rack.version']    = Rack::VERSION
  end
  env['rack.url_scheme'] = uri.scheme
  env['rack.run_once']   = true
  env['rack.session']    = session
  env['rack.session.options'] = session_options
  headers.each do |k, v|
    env["HTTP_#{k.tr('-','_').upcase}"] = v
  end
  env
end

def evaluate(request)
  env = build_rack_env(request)
  status, headers, response = @app.call(env)
  Response.new(
    body: body_from_rack_response(response),
    headers: headers,
    status: [status, Rack::Utils::HTTP_STATUS_CODES[status]]
  )
end

def initialize(app)
  @app = app
end

def session
  @session ||= {}
end

def session_options
  @session_options ||= {}
end