thenavisapp/got/source/core/calculate-retry-delay.ts

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import type {RetryFunction} from './options.js';

type Returns<T extends (...args: any) => unknown, V> = (...args: Parameters<T>) => V;

const calculateRetryDelay: Returns<RetryFunction, number> = ({
	attemptCount,
	retryOptions,
	error,
	retryAfter,
	computedValue,
}) => {
	if (error.name === 'RetryError') {
		return 1;
	}

	if (attemptCount > retryOptions.limit) {
		return 0;
	}

	const hasMethod = retryOptions.methods.includes(error.options.method);
	const hasErrorCode = retryOptions.errorCodes.includes(error.code);
	const hasStatusCode = error.response && retryOptions.statusCodes.includes(error.response.statusCode);
	if (!hasMethod || (!hasErrorCode && !hasStatusCode)) {
		return 0;
	}

	if (error.response) {
		if (retryAfter) {
			// In this case `computedValue` is `options.request.timeout`
			if (retryAfter > computedValue) {
				return 0;
			}

			return retryAfter;
		}

		if (error.response.statusCode === 413) {
			return 0;
		}
	}

	const noise = Math.random() * retryOptions.noise;
	return Math.min(((2 ** (attemptCount - 1)) * 1000), retryOptions.backoffLimit) + noise;
};

export default calculateRetryDelay;