111 lines
4.0 KiB
JavaScript
111 lines
4.0 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @typechecks
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*
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*/
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'use strict';
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var Promise = require('./Promise');
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function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }
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var ExecutionEnvironment = require('./ExecutionEnvironment');
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var sprintf = require('./sprintf');
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var fetch = require('./fetch');
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var warning = require('./warning');
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var DEFAULT_TIMEOUT = 15000;
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var DEFAULT_RETRIES = [1000, 3000];
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/**
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* Makes a POST request to the server with the given data as the payload.
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* Automatic retries are done based on the values in `retryDelays`.
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*/
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function fetchWithRetries(uri, initWithRetries) {
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var _ref = initWithRetries || {},
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fetchTimeout = _ref.fetchTimeout,
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retryDelays = _ref.retryDelays,
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init = _objectWithoutProperties(_ref, ['fetchTimeout', 'retryDelays']);
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var _fetchTimeout = fetchTimeout != null ? fetchTimeout : DEFAULT_TIMEOUT;
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var _retryDelays = retryDelays != null ? retryDelays : DEFAULT_RETRIES;
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var requestsAttempted = 0;
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var requestStartTime = 0;
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return new Promise(function (resolve, reject) {
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/**
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* Sends a request to the server that will timeout after `fetchTimeout`.
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* If the request fails or times out a new request might be scheduled.
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*/
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function sendTimedRequest() {
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requestsAttempted++;
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requestStartTime = Date.now();
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var isRequestAlive = true;
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var request = fetch(uri, init);
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var requestTimeout = setTimeout(function () {
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isRequestAlive = false;
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if (shouldRetry(requestsAttempted)) {
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process.env.NODE_ENV !== 'production' ? warning(false, 'fetchWithRetries: HTTP timeout, retrying.') : void 0;
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retryRequest();
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} else {
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reject(new Error(sprintf('fetchWithRetries(): Failed to get response from server, ' + 'tried %s times.', requestsAttempted)));
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}
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}, _fetchTimeout);
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request.then(function (response) {
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clearTimeout(requestTimeout);
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if (isRequestAlive) {
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// We got a response, we can clear the timeout.
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if (response.status >= 200 && response.status < 300) {
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// Got a response code that indicates success, resolve the promise.
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resolve(response);
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} else if (shouldRetry(requestsAttempted)) {
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// Fetch was not successful, retrying.
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// TODO(#7595849): Only retry on transient HTTP errors.
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process.env.NODE_ENV !== 'production' ? warning(false, 'fetchWithRetries: HTTP error, retrying.') : void 0, retryRequest();
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} else {
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// Request was not successful, giving up.
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var error = new Error(sprintf('fetchWithRetries(): Still no successful response after ' + '%s retries, giving up.', requestsAttempted));
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error.response = response;
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reject(error);
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}
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}
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})['catch'](function (error) {
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clearTimeout(requestTimeout);
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if (shouldRetry(requestsAttempted)) {
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retryRequest();
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} else {
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reject(error);
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}
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});
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}
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/**
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* Schedules another run of sendTimedRequest based on how much time has
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* passed between the time the last request was sent and now.
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*/
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function retryRequest() {
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var retryDelay = _retryDelays[requestsAttempted - 1];
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var retryStartTime = requestStartTime + retryDelay;
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// Schedule retry for a configured duration after last request started.
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setTimeout(sendTimedRequest, retryStartTime - Date.now());
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}
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/**
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* Checks if another attempt should be done to send a request to the server.
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*/
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function shouldRetry(attempt) {
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return ExecutionEnvironment.canUseDOM && attempt <= _retryDelays.length;
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}
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sendTimedRequest();
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});
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}
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module.exports = fetchWithRetries; |