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📁 ..	-	2026-03-21 15:53
📄 async.js /! async * https://github.com/caolan/async * * Copyright 2010-2014 Caolan McMahon * Released under the MIT license / (function () { var async = {}; var noop = function () {}; // global on the server, window in the browser var root, previous_async; if (typeof window == 'object' && this === window) { root = window; } else if (typeof global == 'object' && this === global) { root = global; } else { root = this; } if (root != null) { previous_async = root.async; } async.noConflict = function () { root.async = previous_async; return async; }; function only_once(fn) { var called = false; return function() { if (called) throw new Error("Callback was already called."); called = true; fn.apply(root, arguments); }; } //// cross-browser compatiblity functions //// var _toString = Object.prototype.toString; var _isArray = Array.isArray \|\| function (obj) { return _toString.call(obj) === '[object Array]'; }; var _each = function (arr, iterator) { var index = -1, length = arr.length; while (++index < length) { iterator(arr[index], index, arr); } }; var _map = function (arr, iterator) { var index = -1, length = arr.length, result = Array(length); while (++index < length) { result[index] = iterator(arr[index], index, arr); } return result; }; var _reduce = function (arr, iterator, memo) { _each(arr, function (x, i, a) { memo = iterator(memo, x, i, a); }); return memo; }; var _forEachOf = function (object, iterator) { _each(_keys(object), function (key) { iterator(object[key], key); }); }; var _keys = Object.keys \|\| function (obj) { var keys = []; for (var k in obj) { if (obj.hasOwnProperty(k)) { keys.push(k); } } return keys; }; var _baseSlice = function (arr, start) { start = start \|\| 0; var index = -1; var length = arr.length; if (start) { length -= start; length = length < 0 ? 0 : length; } var result = Array(length); while (++index < length) { result[index] = arr[index + start]; } return result; }; //// exported async module functions //// //// nextTick implementation with browser-compatible fallback //// // capture the global reference to guard against fakeTimer mocks var _setImmediate; if (typeof setImmediate === 'function') { _setImmediate = setImmediate; } if (typeof process === 'undefined' \|\| !(process.nextTick)) { if (_setImmediate) { async.nextTick = function (fn) { // not a direct alias for IE10 compatibility _setImmediate(fn); }; async.setImmediate = async.nextTick; } else { async.nextTick = function (fn) { setTimeout(fn, 0); }; async.setImmediate = async.nextTick; } } else { async.nextTick = process.nextTick; if (_setImmediate) { async.setImmediate = function (fn) { // not a direct alias for IE10 compatibility _setImmediate(fn); }; } else { async.setImmediate = async.nextTick; } } async.each = function (arr, iterator, callback) { callback = callback \|\| noop; if (!arr.length) { return callback(); } var completed = 0; _each(arr, function (x) { iterator(x, only_once(done) ); }); function done(err) { if (err) { callback(err); callback = noop; } else { completed += 1; if (completed >= arr.length) { callback(); } } } }; async.forEach = async.each; async.eachSeries = function (arr, iterator, callback) { callback = callback \|\| noop; if (!arr.length) { return callback(); } var completed = 0; var iterate = function () { iterator(arr[completed], function (err) { if (err) { callback(err); callback = noop; } else { completed += 1; if (completed >= arr.length) { callback(); } else { iterate(); } } }); }; iterate(); }; async.forEachSeries = async.eachSeries; async.eachLimit = function (arr, limit, iterator, callback) { var fn = _eachLimit(limit); fn.apply(null, [arr, iterator, callback]); }; async.forEachLimit = async.eachLimit; var _eachLimit = function (limit) { return function (arr, iterator, callback) { callback = callback \|\| noop; if (!arr.length \|\| limit <= 0) { return callback(); } var completed = 0; var started = 0; var running = 0; (function replenish () { if (completed >= arr.length) { return callback(); } while (running < limit && started < arr.length) { started += 1; running += 1; iterator(arr[started - 1], function (err) { if (err) { callback(err); callback = noop; } else { completed += 1; running -= 1; if (completed >= arr.length) { callback(); } else { replenish(); } } }); } })(); }; }; async.forEachOf = async.eachOf = function (object, iterator, callback) { callback = callback \|\| function () {}; var size = object.length \|\| _keys(object).length; var completed = 0; if (!size) { return callback(); } _forEachOf(object, function (value, key) { iterator(object[key], key, function (err) { if (err) { callback(err); callback = function () {}; } else { completed += 1; if (completed === size) { callback(null); } } }); }); }; async.forEachOfSeries = async.eachOfSeries = function (obj, iterator, callback) { callback = callback \|\| function () {}; var keys = _keys(obj); var size = keys.length; if (!size) { return callback(); } var completed = 0; var iterate = function () { var sync = true; var key = keys[completed]; iterator(obj[key], key, function (err) { if (err) { callback(err); callback = function () {}; } else { completed += 1; if (completed >= size) { callback(null); } else { if (sync) { async.nextTick(iterate); } else { iterate(); } } } }); sync = false; }; iterate(); }; async.forEachOfLimit = async.eachOfLimit = function (obj, limit, iterator, callback) { _forEachOfLimit(limit)(obj, iterator, callback); }; var _forEachOfLimit = function (limit) { return function (obj, iterator, callback) { callback = callback \|\| function () {}; var keys = _keys(obj); var size = keys.length; if (!size \|\| limit <= 0) { return callback(); } var completed = 0; var started = 0; var running = 0; (function replenish () { if (completed >= size) { return callback(); } while (running < limit && started < size) { started += 1; running += 1; var key = keys[started - 1]; iterator(obj[key], key, function (err) { if (err) { callback(err); callback = function () {}; } else { completed += 1; running -= 1; if (completed >= size) { callback(); } else { replenish(); } } }); } })(); }; }; var doParallel = function (fn) { return function () { var args = _baseSlice(arguments); return fn.apply(null, [async.each].concat(args)); }; }; var doParallelLimit = function(limit, fn) { return function () { var args = _baseSlice(arguments); return fn.apply(null, [_eachLimit(limit)].concat(args)); }; }; var doSeries = function (fn) { return function () { var args = _baseSlice(arguments); return fn.apply(null, [async.eachSeries].concat(args)); }; }; var _asyncMap = function (eachfn, arr, iterator, callback) { arr = _map(arr, function (x, i) { return {index: i, value: x}; }); if (!callback) { eachfn(arr, function (x, callback) { iterator(x.value, function (err) { callback(err); }); }); } else { var results = []; eachfn(arr, function (x, callback) { iterator(x.value, function (err, v) { results[x.index] = v; callback(err); }); }, function (err) { callback(err, results); }); } }; async.map = doParallel(_asyncMap); async.mapSeries = doSeries(_asyncMap); async.mapLimit = function (arr, limit, iterator, callback) { return _mapLimit(limit)(arr, iterator, callback); }; var _mapLimit = function(limit) { return doParallelLimit(limit, _asyncMap); }; // reduce only has a series version, as doing reduce in parallel won't // work in many situations. async.reduce = function (arr, memo, iterator, callback) { async.eachSeries(arr, function (x, callback) { iterator(memo, x, function (err, v) { memo = v; callback(err); }); }, function (err) { callback(err, memo); }); }; // inject alias async.inject = async.reduce; // foldl alias async.foldl = async.reduce; async.reduceRight = function (arr, memo, iterator, callback) { var reversed = _map(arr, function (x) { return x; }).reverse(); async.reduce(reversed, memo, iterator, callback); }; // foldr alias async.foldr = async.reduceRight; var _filter = function (eachfn, arr, iterator, callback) { var results = []; arr = _map(arr, function (x, i) { return {index: i, value: x}; }); eachfn(arr, function (x, callback) { iterator(x.value, function (v) { if (v) { results.push(x); } callback(); }); }, function (err) { callback(_map(results.sort(function (a, b) { return a.index - b.index; }), function (x) { return x.value; })); }); }; async.filter = doParallel(_filter); async.filterSeries = doSeries(_filter); // select alias async.select = async.filter; async.selectSeries = async.filterSeries; var _reject = function (eachfn, arr, iterator, callback) { var results = []; arr = _map(arr, function (x, i) { return {index: i, value: x}; }); eachfn(arr, function (x, callback) { iterator(x.value, function (v) { if (!v) { results.push(x); } callback(); }); }, function (err) { callback(_map(results.sort(function (a, b) { return a.index - b.index; }), function (x) { return x.value; })); }); }; async.reject = doParallel(_reject); async.rejectSeries = doSeries(_reject); var _detect = function (eachfn, arr, iterator, main_callback) { eachfn(arr, function (x, callback) { iterator(x, function (result) { if (result) { main_callback(x); main_callback = noop; } else { callback(); } }); }, function (err) { main_callback(); }); }; async.detect = doParallel(_detect); async.detectSeries = doSeries(_detect); async.some = function (arr, iterator, main_callback) { async.each(arr, function (x, callback) { iterator(x, function (v) { if (v) { main_callback(true); main_callback = noop; } callback(); }); }, function (err) { main_callback(false); }); }; // any alias async.any = async.some; async.every = function (arr, iterator, main_callback) { async.each(arr, function (x, callback) { iterator(x, function (v) { if (!v) { main_callback(false); main_callback = noop; } callback(); }); }, function (err) { main_callback(true); }); }; // all alias async.all = async.every; async.sortBy = function (arr, iterator, callback) { async.map(arr, function (x, callback) { iterator(x, function (err, criteria) { if (err) { callback(err); } else { callback(null, {value: x, criteria: criteria}); } }); }, function (err, results) { if (err) { return callback(err); } else { var fn = function (left, right) { var a = left.criteria, b = right.criteria; return a < b ? -1 : a > b ? 1 : 0; }; callback(null, _map(results.sort(fn), function (x) { return x.value; })); } }); }; async.auto = function (tasks, callback) { callback = callback \|\| noop; var keys = _keys(tasks); var remainingTasks = keys.length; if (!remainingTasks) { return callback(); } var results = {}; var listeners = []; var addListener = function (fn) { listeners.unshift(fn); }; var removeListener = function (fn) { for (var i = 0; i < listeners.length; i += 1) { if (listeners[i] === fn) { listeners.splice(i, 1); return; } } }; var taskComplete = function () { remainingTasks--; _each(listeners.slice(0), function (fn) { fn(); }); }; addListener(function () { if (!remainingTasks) { var theCallback = callback; // prevent final callback from calling itself if it errors callback = noop; theCallback(null, results); } }); _each(keys, function (k) { var task = _isArray(tasks[k]) ? tasks[k]: [tasks[k]]; var taskCallback = function (err) { var args = _baseSlice(arguments, 1); if (args.length <= 1) { args = args[0]; } if (err) { var safeResults = {}; _each(_keys(results), function(rkey) { safeResults[rkey] = results[rkey]; }); safeResults[k] = args; callback(err, safeResults); // stop subsequent errors hitting callback multiple times callback = noop; } else { results[k] = args; async.setImmediate(taskComplete); } }; var requires = task.slice(0, Math.abs(task.length - 1)) \|\| []; // prevent dead-locks var len = requires.length; var dep; while (len--) { if (!(dep = tasks[requires[len]])) { throw new Error('Has inexistant dependency'); } if (_isArray(dep) && !!~dep.indexOf(k)) { throw new Error('Has cyclic dependencies'); } } var ready = function () { return _reduce(requires, function (a, x) { return (a && results.hasOwnProperty(x)); }, true) && !results.hasOwnProperty(k); }; if (ready()) { task[task.length - 1](taskCallback, results); } else { var listener = function () { if (ready()) { removeListener(listener); task[task.length - 1](taskCallback, results); } }; addListener(listener); } }); }; async.retry = function(times, task, callback) { var DEFAULT_TIMES = 5; var attempts = []; // Use defaults if times not passed if (typeof times === 'function') { callback = task; task = times; times = DEFAULT_TIMES; } // Make sure times is a number times = parseInt(times, 10) \|\| DEFAULT_TIMES; var wrappedTask = function(wrappedCallback, wrappedResults) { var retryAttempt = function(task, finalAttempt) { return function(seriesCallback) { task(function(err, result){ seriesCallback(!err \|\| finalAttempt, {err: err, result: result}); }, wrappedResults); }; }; while (times) { attempts.push(retryAttempt(task, !(times-=1))); } async.series(attempts, function(done, data){ data = data[data.length - 1]; (wrappedCallback \|\| callback)(data.err, data.result); }); }; // If a callback is passed, run this as a controll flow return callback ? wrappedTask() : wrappedTask; }; async.waterfall = function (tasks, callback) { callback = callback \|\| noop; if (!_isArray(tasks)) { var err = new Error('First argument to waterfall must be an array of functions'); return callback(err); } if (!tasks.length) { return callback(); } var wrapIterator = function (iterator) { return function (err) { if (err) { callback.apply(null, arguments); callback = noop; } else { var args = _baseSlice(arguments, 1); var next = iterator.next(); if (next) { args.push(wrapIterator(next)); } else { args.push(callback); } async.setImmediate(function () { iterator.apply(null, args); }); } }; }; wrapIterator(async.iterator(tasks))(); }; var _parallel = function(eachfn, tasks, callback) { callback = callback \|\| noop; if (_isArray(tasks)) { eachfn.map(tasks, function (fn, callback) { if (fn) { fn(function (err) { var args = _baseSlice(arguments, 1); if (args.length <= 1) { args = args[0]; } callback.call(null, err, args); }); } }, callback); } else { var results = {}; eachfn.each(_keys(tasks), function (k, callback) { tasks[k](function (err) { var args = _baseSlice(arguments, 1); if (args.length <= 1) { args = args[0]; } results[k] = args; callback(err); }); }, function (err) { callback(err, results); }); } }; async.parallel = function (tasks, callback) { _parallel({ map: async.map, each: async.each }, tasks, callback); }; async.parallelLimit = function(tasks, limit, callback) { _parallel({ map: _mapLimit(limit), each: _eachLimit(limit) }, tasks, callback); }; async.series = function (tasks, callback) { callback = callback \|\| noop; if (_isArray(tasks)) { async.mapSeries(tasks, function (fn, callback) { if (fn) { fn(function (err) { var args = _baseSlice(arguments, 1); if (args.length <= 1) { args = args[0]; } callback.call(null, err, args); }); } }, callback); } else { var results = {}; async.eachSeries(_keys(tasks), function (k, callback) { tasks[k](function (err) { var args = _baseSlice(arguments, 1); if (args.length <= 1) { args = args[0]; } results[k] = args; callback(err); }); }, function (err) { callback(err, results); }); } }; async.iterator = function (tasks) { var makeCallback = function (index) { var fn = function () { if (tasks.length) { tasks[index].apply(null, arguments); } return fn.next(); }; fn.next = function () { return (index < tasks.length - 1) ? makeCallback(index + 1): null; }; return fn; }; return makeCallback(0); }; async.apply = function (fn) { var args = _baseSlice(arguments, 1); return function () { return fn.apply( null, args.concat(_baseSlice(arguments)) ); }; }; var _concat = function (eachfn, arr, fn, callback) { var r = []; eachfn(arr, function (x, cb) { fn(x, function (err, y) { r = r.concat(y \|\| []); cb(err); }); }, function (err) { callback(err, r); }); }; async.concat = doParallel(_concat); async.concatSeries = doSeries(_concat); async.whilst = function (test, iterator, callback) { if (test()) { iterator(function (err) { if (err) { return callback(err); } async.whilst(test, iterator, callback); }); } else { callback(); } }; async.doWhilst = function (iterator, test, callback) { iterator(function (err) { if (err) { return callback(err); } var args = _baseSlice(arguments, 1); if (test.apply(null, args)) { async.doWhilst(iterator, test, callback); } else { callback(); } }); }; async.until = function (test, iterator, callback) { if (!test()) { iterator(function (err) { if (err) { return callback(err); } async.until(test, iterator, callback); }); } else { callback(); } }; async.doUntil = function (iterator, test, callback) { iterator(function (err) { if (err) { return callback(err); } var args = _baseSlice(arguments, 1); if (!test.apply(null, args)) { async.doUntil(iterator, test, callback); } else { callback(); } }); }; async.queue = function (worker, concurrency) { if (concurrency === undefined) { concurrency = 1; } else if(concurrency === 0) { throw new Error('Concurrency must not be zero'); } function _insert(q, data, pos, callback) { if (!q.started){ q.started = true; } if (!_isArray(data)) { data = [data]; } if(data.length === 0) { // call drain immediately if there are no tasks return async.setImmediate(function() { if (q.drain) { q.drain(); } }); } _each(data, function(task) { var item = { data: task, callback: typeof callback === 'function' ? callback : null }; if (pos) { q.tasks.unshift(item); } else { q.tasks.push(item); } if (q.saturated && q.tasks.length === q.concurrency) { q.saturated(); } async.setImmediate(q.process); }); } var workers = 0; var q = { tasks: [], concurrency: concurrency, saturated: null, empty: null, drain: null, started: false, paused: false, push: function (data, callback) { _insert(q, data, false, callback); }, kill: function () { q.drain = null; q.tasks = []; }, unshift: function (data, callback) { _insert(q, data, true, callback); }, process: function () { if (!q.paused && workers < q.concurrency && q.tasks.length) { var task = q.tasks.shift(); if (q.empty && q.tasks.length === 0) { q.empty(); } workers += 1; var next = function () { workers -= 1; if (task.callback) { task.callback.apply(task, arguments); } if (q.drain && q.tasks.length + workers === 0) { q.drain(); } q.process(); }; var cb = only_once(next); worker(task.data, cb); } }, length: function () { return q.tasks.length; }, running: function () { return workers; }, idle: function() { return q.tasks.length + workers === 0; }, pause: function () { if (q.paused === true) { return; } q.paused = true; }, resume: function () { if (q.paused === false) { return; } q.paused = false; var resumeCount = Math.min(q.concurrency, q.tasks.length); // Need to call q.process once per concurrent // worker to preserve full concurrency after pause for (var w = 1; w <= resumeCount; w++) { async.setImmediate(q.process); } } }; return q; }; async.priorityQueue = function (worker, concurrency) { function _compareTasks(a, b){ return a.priority - b.priority; } function _binarySearch(sequence, item, compare) { var beg = -1, end = sequence.length - 1; while (beg < end) { var mid = beg + ((end - beg + 1) >>> 1); if (compare(item, sequence[mid]) >= 0) { beg = mid; } else { end = mid - 1; } } return beg; } function _insert(q, data, priority, callback) { if (!q.started){ q.started = true; } if (!_isArray(data)) { data = [data]; } if(data.length === 0) { // call drain immediately if there are no tasks return async.setImmediate(function() { if (q.drain) { q.drain(); } }); } _each(data, function(task) { var item = { data: task, priority: priority, callback: typeof callback === 'function' ? callback : null }; q.tasks.splice(_binarySearch(q.tasks, item, _compareTasks) + 1, 0, item); if (q.saturated && q.tasks.length === q.concurrency) { q.saturated(); } async.setImmediate(q.process); }); } // Start with a normal queue var q = async.queue(worker, concurrency); // Override push to accept second parameter representing priority q.push = function (data, priority, callback) { _insert(q, data, priority, callback); }; // Remove unshift function delete q.unshift; return q; }; async.cargo = function (worker, payload) { var working = false, tasks = []; var cargo = { tasks: tasks, payload: payload, saturated: null, empty: null, drain: null, drained: true, push: function (data, callback) { if (!_isArray(data)) { data = [data]; } _each(data, function(task) { tasks.push({ data: task, callback: typeof callback === 'function' ? callback : null }); cargo.drained = false; if (cargo.saturated && tasks.length === payload) { cargo.saturated(); } }); async.setImmediate(cargo.process); }, process: function process() { if (working) return; if (tasks.length === 0) { if(cargo.drain && !cargo.drained) cargo.drain(); cargo.drained = true; return; } var ts = typeof payload === 'number' ? tasks.splice(0, payload) : tasks.splice(0, tasks.length); var ds = _map(ts, function (task) { return task.data; }); if(cargo.empty) cargo.empty(); working = true; worker(ds, function () { working = false; var args = arguments; _each(ts, function (data) { if (data.callback) { data.callback.apply(null, args); } }); process(); }); }, length: function () { return tasks.length; }, running: function () { return working; } }; return cargo; }; var _console_fn = function (name) { return function (fn) { var args = _baseSlice(arguments, 1); fn.apply(null, args.concat([function (err) { var args = _baseSlice(arguments, 1); if (typeof console !== 'undefined') { if (err) { if (console.error) { console.error(err); } } else if (console[name]) { _each(args, function (x) { console[name](x); }); } } }])); }; }; async.log = _console_fn('log'); async.dir = _console_fn('dir'); /async.info = _console_fn('info'); async.warn = _console_fn('warn'); async.error = _console_fn('error');/ async.memoize = function (fn, hasher) { var memo = {}; var queues = {}; hasher = hasher \|\| function (x) { return x; }; var memoized = function () { var args = _baseSlice(arguments); var callback = args.pop(); var key = hasher.apply(null, args); if (key in memo) { async.nextTick(function () { callback.apply(null, memo[key]); }); } else if (key in queues) { queues[key].push(callback); } else { queues[key] = [callback]; fn.apply(null, args.concat([function () { memo[key] = _baseSlice(arguments); var q = queues[key]; delete queues[key]; for (var i = 0, l = q.length; i < l; i++) { q[i].apply(null, arguments); } }])); } }; memoized.memo = memo; memoized.unmemoized = fn; return memoized; }; async.unmemoize = function (fn) { return function () { return (fn.unmemoized \|\| fn).apply(null, arguments); }; }; async.times = function (count, iterator, callback) { var counter = []; for (var i = 0; i < count; i++) { counter.push(i); } return async.map(counter, iterator, callback); }; async.timesSeries = function (count, iterator, callback) { var counter = []; for (var i = 0; i < count; i++) { counter.push(i); } return async.mapSeries(counter, iterator, callback); }; async.seq = function (/ functions... /) { var fns = arguments; return function () { var that = this; var args = _baseSlice(arguments); var callback = args.pop(); async.reduce(fns, args, function (newargs, fn, cb) { fn.apply(that, newargs.concat([function () { var err = arguments[0]; var nextargs = _baseSlice(arguments, 1); cb(err, nextargs); }])); }, function (err, results) { callback.apply(that, [err].concat(results)); }); }; }; async.compose = function (/ functions... /) { return async.seq.apply(null, Array.prototype.reverse.call(arguments)); }; var _applyEach = function (eachfn, fns /args...*/) { var go = function () { var that = this; var args = _baseSlice(arguments); var callback = args.pop(); return eachfn(fns, function (fn, cb) { fn.apply(that, args.concat([cb])); }, callback); }; if (arguments.length > 2) { var args = _baseSlice(arguments, 2); return go.apply(this, args); } else { return go; } }; async.applyEach = doParallel(_applyEach); async.applyEachSeries = doSeries(_applyEach); async.forever = function (fn, callback) { function next(err) { if (err) { if (callback) { return callback(err); } throw err; } fn(next); } next(); }; // Node.js if (typeof module !== 'undefined' && module.exports) { module.exports = async; } // AMD / RequireJS else if (typeof define !== 'undefined' && define.amd) { define([], function () { return async; }); } // included directly via <script> tag else { root.async = async; } }());	37.92 KB	2025-11-20 11:36

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