bruno
ff99b8eb2b
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89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = timeout;
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var _initialParams = require('./internal/initialParams.js');
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var _initialParams2 = _interopRequireDefault(_initialParams);
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var _wrapAsync = require('./internal/wrapAsync.js');
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var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Sets a time limit on an asynchronous function. If the function does not call
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* its callback within the specified milliseconds, it will be called with a
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* timeout error. The code property for the error object will be `'ETIMEDOUT'`.
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*
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* @name timeout
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* @static
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* @memberOf module:Utils
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* @method
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* @category Util
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* @param {AsyncFunction} asyncFn - The async function to limit in time.
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* @param {number} milliseconds - The specified time limit.
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* @param {*} [info] - Any variable you want attached (`string`, `object`, etc)
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* to timeout Error for more information..
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* @returns {AsyncFunction} Returns a wrapped function that can be used with any
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* of the control flow functions.
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* Invoke this function with the same parameters as you would `asyncFunc`.
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* @example
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*
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* function myFunction(foo, callback) {
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* doAsyncTask(foo, function(err, data) {
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* // handle errors
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* if (err) return callback(err);
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*
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* // do some stuff ...
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*
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* // return processed data
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* return callback(null, data);
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* });
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* }
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*
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* var wrapped = async.timeout(myFunction, 1000);
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*
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* // call `wrapped` as you would `myFunction`
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* wrapped({ bar: 'bar' }, function(err, data) {
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* // if `myFunction` takes < 1000 ms to execute, `err`
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* // and `data` will have their expected values
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*
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* // else `err` will be an Error with the code 'ETIMEDOUT'
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* });
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*/
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function timeout(asyncFn, milliseconds, info) {
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var fn = (0, _wrapAsync2.default)(asyncFn);
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return (0, _initialParams2.default)((args, callback) => {
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var timedOut = false;
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var timer;
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function timeoutCallback() {
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var name = asyncFn.name || 'anonymous';
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var error = new Error('Callback function "' + name + '" timed out.');
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error.code = 'ETIMEDOUT';
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if (info) {
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error.info = info;
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}
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timedOut = true;
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callback(error);
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}
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args.push((...cbArgs) => {
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if (!timedOut) {
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callback(...cbArgs);
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clearTimeout(timer);
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}
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});
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// setup timer and call original function
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timer = setTimeout(timeoutCallback, milliseconds);
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fn(...args);
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});
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}
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module.exports = exports.default; |