retryable.js

import {
  HTTP_METHOD_DELETE,
  HTTP_METHOD_GET,
  HTTP_METHOD_HEAD,
  HTTP_METHOD_OPTIONS,
  HTTP_METHOD_PATCH,
  HTTP_METHOD_POST,
  HTTP_METHOD_PUT,
} from './http-methods'

/**
 * Error codes which can be retried
 */
export const RETRYABLE_ERROR_CODES = new Set([
  'EADDRINUSE',
  'EAI_AGAIN',
  'ECONNREFUSED',
  'ECONNRESET',
  'ENETUNREACH',
  'ENOTFOUND',
  'EPIPE',
  'ETIMEDOUT',
])

/**
 * HTTP status codes which can be retried
 */
export const RETRYABLE_STATUS_CODES = new Set([408, 413, 429, 500, 502, 503, 504, 521, 522, 524])

/**
 * HTTP methods which can be retried
 */
export const RETRYABLE_HTTP_METHODS = new Set([
  HTTP_METHOD_DELETE,
  HTTP_METHOD_GET,
  HTTP_METHOD_HEAD,
  HTTP_METHOD_OPTIONS,
  HTTP_METHOD_PATCH,
  HTTP_METHOD_POST,
  HTTP_METHOD_PUT,
])