@sap-cloud-sdk/resilience/dist/retry.js

SAP Cloud SDK for JavaScript resilience

"use strict";
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var __importStar = (this && this.__importStar) || (function () {
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Object.defineProperty(exports, "__esModule", { value: true });
exports.retry = retry;
const util_1 = require("@sap-cloud-sdk/util");
const asyncRetry = __importStar(require("async-retry"));
const logger = (0, util_1.createLogger)({
    package: 'resilience',
    messageContext: 'retry'
});
const defaultRetries = 3;
/**
 * Helper method to build a retry middleware.
 * @param retries - Number of retry attempts. Default value is 3.
 * @returns The middleware adding a retry to the function.
 */
function retry(retries = defaultRetries) {
    if (retries < 0) {
        throw new Error('Number of retries must be greater or equal to 0.');
    }
    return function (options) {
        return arg => asyncRetry.default(async (bail) => {
            try {
                return await options.fn(arg);
            }
            catch (error) {
                // Don't retry on error statuses where a second attempt won't help
                const status = error?.response?.status;
                if (!status) {
                    logger.debug('HTTP request failed but error did not contain a response status field as expected. Rethrowing error.');
                }
                else if (status.toString().startsWith('4')) {
                    bail(new util_1.ErrorWithCause(`Request failed with status code ${status}`, error));
                    // We need to return something here but the actual value does not matter
                    return undefined;
                }
                throw error;
            }
        }, { retries });
    };
}
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