@aws-amplify/core
Version:
Core category of aws-amplify
155 lines (154 loc) • 8.35 kB
JavaScript
;
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.retryMiddleware = void 0;
var DEFAULT_RETRY_ATTEMPTS = 3;
/**
* Retry middleware
*/
var retryMiddleware = function (_a) {
var _b = _a.maxAttempts, maxAttempts = _b === void 0 ? DEFAULT_RETRY_ATTEMPTS : _b, retryDecider = _a.retryDecider, computeDelay = _a.computeDelay, abortSignal = _a.abortSignal;
if (maxAttempts < 1) {
throw new Error('maxAttempts must be greater than 0');
}
return function (next, context) {
return function retryMiddleware(request) {
var _a;
return __awaiter(this, void 0, void 0, function () {
var error, attemptsCount, response, handleTerminalErrorOrResponse, e_1, delay;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
attemptsCount = (_a = context.attemptsCount) !== null && _a !== void 0 ? _a : 0;
handleTerminalErrorOrResponse = function () {
if (response) {
addOrIncrementMetadataAttempts(response, attemptsCount);
return response;
}
else {
addOrIncrementMetadataAttempts(error, attemptsCount);
throw error;
}
};
_b.label = 1;
case 1:
if (!(!(abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.aborted) && attemptsCount < maxAttempts)) return [3 /*break*/, 11];
_b.label = 2;
case 2:
_b.trys.push([2, 4, , 5]);
return [4 /*yield*/, next(request)];
case 3:
response = _b.sent();
error = undefined;
return [3 /*break*/, 5];
case 4:
e_1 = _b.sent();
error = e_1;
response = undefined;
return [3 /*break*/, 5];
case 5:
// context.attemptsCount may be updated after calling next handler which may retry the request by itself.
attemptsCount =
context.attemptsCount > attemptsCount
? context.attemptsCount
: attemptsCount + 1;
context.attemptsCount = attemptsCount;
return [4 /*yield*/, retryDecider(response, error)];
case 6:
if (!_b.sent()) return [3 /*break*/, 9];
if (!(!(abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.aborted) && attemptsCount < maxAttempts)) return [3 /*break*/, 8];
delay = computeDelay(attemptsCount);
return [4 /*yield*/, cancellableSleep(delay, abortSignal)];
case 7:
_b.sent();
_b.label = 8;
case 8: return [3 /*break*/, 1];
case 9: return [2 /*return*/, handleTerminalErrorOrResponse()];
case 10: return [3 /*break*/, 1];
case 11:
if (abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.aborted) {
throw new Error('Request aborted.');
}
else {
return [2 /*return*/, handleTerminalErrorOrResponse()];
}
return [2 /*return*/];
}
});
});
};
};
};
exports.retryMiddleware = retryMiddleware;
var cancellableSleep = function (timeoutMs, abortSignal) {
if (abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.aborted) {
return Promise.resolve();
}
var timeoutId;
var sleepPromiseResolveFn;
var sleepPromise = new Promise(function (resolve) {
sleepPromiseResolveFn = resolve;
timeoutId = setTimeout(resolve, timeoutMs);
});
abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.addEventListener('abort', function cancelSleep(event) {
clearTimeout(timeoutId);
abortSignal === null || abortSignal === void 0 ? void 0 : abortSignal.removeEventListener('abort', cancelSleep);
sleepPromiseResolveFn();
});
return sleepPromise;
};
var addOrIncrementMetadataAttempts = function (nextHandlerOutput, attempts) {
var _a;
if (Object.prototype.toString.call(nextHandlerOutput) !== '[object Object]') {
return;
}
nextHandlerOutput['$metadata'] = __assign(__assign({}, ((_a = nextHandlerOutput['$metadata']) !== null && _a !== void 0 ? _a : {})), { attempts: attempts });
};