source: trip-planner-front/node_modules/async/timeout.js@ 76712b2

Last change on this file since 76712b2 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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File size: 2.7 KB
Line 
1'use strict';
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = timeout;
7
8var _initialParams = require('./internal/initialParams');
9
10var _initialParams2 = _interopRequireDefault(_initialParams);
11
12var _wrapAsync = require('./internal/wrapAsync');
13
14var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
15
16function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
17
18/**
19 * Sets a time limit on an asynchronous function. If the function does not call
20 * its callback within the specified milliseconds, it will be called with a
21 * timeout error. The code property for the error object will be `'ETIMEDOUT'`.
22 *
23 * @name timeout
24 * @static
25 * @memberOf module:Utils
26 * @method
27 * @category Util
28 * @param {AsyncFunction} asyncFn - The async function to limit in time.
29 * @param {number} milliseconds - The specified time limit.
30 * @param {*} [info] - Any variable you want attached (`string`, `object`, etc)
31 * to timeout Error for more information..
32 * @returns {AsyncFunction} Returns a wrapped function that can be used with any
33 * of the control flow functions.
34 * Invoke this function with the same parameters as you would `asyncFunc`.
35 * @example
36 *
37 * function myFunction(foo, callback) {
38 * doAsyncTask(foo, function(err, data) {
39 * // handle errors
40 * if (err) return callback(err);
41 *
42 * // do some stuff ...
43 *
44 * // return processed data
45 * return callback(null, data);
46 * });
47 * }
48 *
49 * var wrapped = async.timeout(myFunction, 1000);
50 *
51 * // call `wrapped` as you would `myFunction`
52 * wrapped({ bar: 'bar' }, function(err, data) {
53 * // if `myFunction` takes < 1000 ms to execute, `err`
54 * // and `data` will have their expected values
55 *
56 * // else `err` will be an Error with the code 'ETIMEDOUT'
57 * });
58 */
59function timeout(asyncFn, milliseconds, info) {
60 var fn = (0, _wrapAsync2.default)(asyncFn);
61
62 return (0, _initialParams2.default)(function (args, callback) {
63 var timedOut = false;
64 var timer;
65
66 function timeoutCallback() {
67 var name = asyncFn.name || 'anonymous';
68 var error = new Error('Callback function "' + name + '" timed out.');
69 error.code = 'ETIMEDOUT';
70 if (info) {
71 error.info = info;
72 }
73 timedOut = true;
74 callback(error);
75 }
76
77 args.push(function () {
78 if (!timedOut) {
79 callback.apply(null, arguments);
80 clearTimeout(timer);
81 }
82 });
83
84 // setup timer and call original function
85 timer = setTimeout(timeoutCallback, milliseconds);
86 fn.apply(null, args);
87 });
88}
89module.exports = exports['default'];
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