RetryInterceptor class

A Dio interceptor that automatically retries failed requests with exponential backoff.

This interceptor handles transient failures by retrying requests that fail due to:

• Connection timeouts, send timeouts, receive timeouts
• Network errors (no internet connection)
• Configurable HTTP status codes (default: 408, 429, 500, 502, 503, 504)

The delay between retries increases exponentially to avoid overwhelming servers that may be experiencing high load.

Example:

dio.interceptors.add(
  RetryInterceptor(
    dio: dio,
    retryOptions: RetryOptions(
      enabled: true,
      maxRetries: 3,
      initialDelay: Duration(milliseconds: 500),
    ),
  ),
);