ut2/lib/retry.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

var tslib = require('tslib');
var sleep = require('./sleep.js');
var tryit = require('./tryit.js');

function retry(fn, options) {
    return tslib.__awaiter(this, void 0, void 0, function () {
        var _a, _b, times, delay, backoff, exit, i, _c, err, result;
        return tslib.__generator(this, function (_d) {
            switch (_d.label) {
                case 0:
                    _a = options || {}, _b = _a.times, times = _b === void 0 ? 3 : _b, delay = _a.delay, backoff = _a.backoff, exit = _a.exit;
                    i = 1;
                    _d.label = 1;
                case 1:
                    if (!(i <= times)) return [3, 7];
                    return [4, tryit(fn)()];
                case 2:
                    _c = tslib.__read.apply(void 0, [_d.sent(), 2]), err = _c[0], result = _c[1];
                    if (!err)
                        return [2, result];
                    if ((exit && exit(err, i)) || i === times)
                        throw err;
                    if (!delay) return [3, 4];
                    return [4, sleep(delay)];
                case 3:
                    _d.sent();
                    _d.label = 4;
                case 4:
                    if (!backoff) return [3, 6];
                    return [4, sleep(backoff(i))];
                case 5:
                    _d.sent();
                    _d.label = 6;
                case 6:
                    i++;
                    return [3, 1];
                case 7: return [2];
            }
        });
    });
}

module.exports = retry;