declare const enum HttpCode {
  // 100
  'CONTINUE' = 100,
  'SWITCHING_PROTOCOLS' = 101,
  'PROCESSING' = 102,

  // 200
  'OK' = 200,
  'CREATED' = 201,
  'ACCEPTED' = 202,
  'NON_AUTHORITATIVE_INFORMATION' = 203,
  'NO_CONTENT' = 204,
  'RESET_CONTENT' = 205,
  'PARTIAL_CONTENT' = 206,
  'MULTI_STATUS' = 207,

  // 300
  'MULTIPLE_CHOICES' = 300,
  'MOVED_PERMANENTLY' = 301,
  'MOVED_TEMPORARILY' = 302,
  'SEE_OTHER' = 303,
  'NOT_MODIFIED' = 304,
  'USE_PROXY' = 305,
  'TEMPORARY_REDIRECT' = 307,
  'PERMANENT_REDIRECT' = 308,

  // 400
  'BAD_REQUEST' = 400,
  'UNAUTHORIZED' = 401,
  'PAYMENT_REQUIRED' = 402,
  'FORBIDDEN' = 403,
  'NOT_FOUND' = 404,
  'METHOD_NOT_ALLOWED' = 405,
  'NOT_ACCEPTABLE' = 406,
  'PROXY_AUTHENTICATION_REQUIRED' = 407,
  'REQUEST_TIMEOUT' = 408,
  'CONFLICT' = 409,
  'GONE' = 410,
  'LENGTH_REQUIRED' = 411,
  'PRECONDITION_FAILED' = 412,
  'REQUEST_TOO_LONG' = 413,
  'REQUEST_URI_TOO_LONG' = 414,
  'UNSUPPORTED_MEDIA_TYPE' = 415,
  'REQUESTED_RANGE_NOT_SATISFIABLE' = 416,
  'EXPECTATION_FAILED' = 417,
  'IM_A_TEAPOT' = 418,
  'INSUFFICIENT_SPACE_ON_RESOURCE' = 419,
  'METHOD_FAILURE' = 420, // nice
  'UNPROCESSABLE_ENTITY' = 422,
  'LOCKED' = 423,
  'FAILED_DEPENDENCY' = 424,
  'PRECONDITION_REQUIRED' = 428,
  'TOO_MANY_REQUESTS' = 429,
  'REQUEST_HEADER_FIELDS_TOO_LARGE' = 431,

  // 500
  'INTERNAL_SERVER_ERROR' = 500,
  'NOT_IMPLEMENTED' = 501,
  'BAD_GATEWAY' = 502,
  'SERVICE_UNAVAILABLE' = 503,
  'GATEWAY_TIMEOUT' = 504,
  'HTTP_VERSION_NOT_SUPPORTED' = 505,
  'INSUFFICIENT_STORAGE' = 507,
  'NETWORK_AUTHENTICATION_REQUIRED' = 511,
}