defaultTransientHttpStatusCodes constant
A list of HTTP status codes that can generally be retried.
You may want to use a different list depending on the needs of your application.
Implementation
static const List<int> defaultTransientHttpStatusCodes = <int>[
0, // Network error
408, // Request timeout
500, // Internal server error
502, // Bad gateway
503, // Service unavailable
504 // Gateway timeout
];