'use strict'; class TimeoutError extends Error { constructor(message, err) { super(message); this.name = "TimeoutError"; this.previous = err; } } function matches(match, err) { if (match === true) return true; if (typeof match === 'function') { try { if (err instanceof match) return true; } catch (_) { return !!match(err); } } if (match === err.toString()) return true; if (match === err.message) return true; return match instanceof RegExp && (match.test(err.message) || match.test(err.toString())); } module.exports = function retryAsPromised(callback, options) { if (!callback || !options) { throw new Error( 'retry-as-promised must be passed a callback and a options set or a number' ); } if (typeof options === 'number') { options = { max: options }; } // Super cheap clone options = { $current: options.$current || 1, max: options.max, timeout: options.timeout || undefined, match: options.match || [], backoffBase: options.backoffBase === undefined ? 100 : options.backoffBase, backoffExponent: options.backoffExponent || 1.1, report: options.report || function () {}, name: options.name || callback.name || 'unknown' }; if (!Array.isArray(options.match)) options.match = [options.match]; options.report('Trying ' + options.name + ' #' + options.$current + ' at ' + new Date().toLocaleTimeString(), options); return new Promise(function(resolve, reject) { var timeout, backoffTimeout, lastError; if (options.timeout) { timeout = setTimeout(function() { if (backoffTimeout) clearTimeout(backoffTimeout); reject(new TimeoutError(options.name + ' timed out', lastError)); }, options.timeout); } Promise.resolve(callback({ current: options.$current })) .then(resolve) .then(function() { if (timeout) clearTimeout(timeout); if (backoffTimeout) clearTimeout(backoffTimeout); }) .catch(function(err) { if (timeout) clearTimeout(timeout); if (backoffTimeout) clearTimeout(backoffTimeout); lastError = err; options.report((err && err.toString()) || err, options, err); // Should not retry if max has been reached var shouldRetry = options.$current < options.max; if (!shouldRetry) return reject(err); shouldRetry = options.match.length === 0 || options.match.some(function (match) { return matches(match, err) }); if (!shouldRetry) return reject(err); var retryDelay = options.backoffBase * Math.pow(options.backoffExponent, options.$current - 1); // Do some accounting options.$current++; options.report(`Retrying ${options.name} (${options.$current})`, options); if (retryDelay) { // Use backoff function to ease retry rate options.report(`Delaying retry of ${options.name} by ${retryDelay}`, options); backoffTimeout = setTimeout(function() { retryAsPromised(callback, options) .then(resolve) .catch(reject); }, retryDelay); } else { retryAsPromised(callback, options) .then(resolve) .catch(reject); } }); }); }; module.exports.TimeoutError = TimeoutError;