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function objectOrFunction(x) {\n var type = typeof x;\n return x !== null && (type === 'object' || type === 'function');\n}\n\nexport function isFunction(x) {\n return typeof x === 'function';\n}\n\nexport function isMaybeThenable(x) {\n return x !== null && typeof x === 'object';\n}\n\nvar _isArray = void 0;\nif (Array.isArray) {\n _isArray = Array.isArray;\n} else {\n _isArray = function (x) {\n return Object.prototype.toString.call(x) === '[object Array]';\n };\n}\n\nexport var isArray = _isArray;","var len = 0;\nvar vertxNext = void 0;\nvar customSchedulerFn = void 0;\n\nexport var asap = function asap(callback, arg) {\n queue[len] = callback;\n queue[len + 1] = arg;\n len += 2;\n if (len === 2) {\n // If len is 2, that means that we need to schedule an async flush.\n // If additional callbacks are queued before the queue is flushed, they\n // will be processed by this flush that we are scheduling.\n if (customSchedulerFn) {\n customSchedulerFn(flush);\n } else {\n scheduleFlush();\n }\n }\n};\n\nexport function setScheduler(scheduleFn) {\n customSchedulerFn = scheduleFn;\n}\n\nexport function setAsap(asapFn) {\n asap = asapFn;\n}\n\nvar browserWindow = typeof window !== 'undefined' ? window : undefined;\nvar browserGlobal = browserWindow || {};\nvar BrowserMutationObserver = browserGlobal.MutationObserver || browserGlobal.WebKitMutationObserver;\nvar isNode = typeof self === 'undefined' && typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';\n\n// test for web worker but not in IE10\nvar isWorker = typeof Uint8ClampedArray !== 'undefined' && typeof importScripts !== 'undefined' && typeof MessageChannel !== 'undefined';\n\n// node\nfunction useNextTick() {\n // node version 0.10.x displays a deprecation warning when nextTick is used recursively\n // see https://github.com/cujojs/when/issues/410 for details\n return function () {\n return process.nextTick(flush);\n };\n}\n\n// vertx\nfunction useVertxTimer() {\n if (typeof vertxNext !== 'undefined') {\n return function () {\n vertxNext(flush);\n };\n }\n\n return useSetTimeout();\n}\n\nfunction useMutationObserver() {\n var iterations = 0;\n var observer = new BrowserMutationObserver(flush);\n var node = document.createTextNode('');\n observer.observe(node, { characterData: true });\n\n return function () {\n node.data = iterations = ++iterations % 2;\n };\n}\n\n// web worker\nfunction useMessageChannel() {\n var channel = new MessageChannel();\n channel.port1.onmessage = flush;\n return function () {\n return channel.port2.postMessage(0);\n };\n}\n\nfunction useSetTimeout() {\n // Store setTimeout reference so es6-promise will be unaffected by\n // other code modifying setTimeout (like sinon.useFakeTimers())\n var globalSetTimeout = setTimeout;\n return function () {\n return globalSetTimeout(flush, 1);\n };\n}\n\nvar queue = new Array(1000);\nfunction flush() {\n for (var i = 0; i < len; i += 2) {\n var callback = queue[i];\n var arg = queue[i + 1];\n\n callback(arg);\n\n queue[i] = undefined;\n queue[i + 1] = undefined;\n }\n\n len = 0;\n}\n\nfunction attemptVertx() {\n try {\n var r = require;\n var vertx = r('vertx');\n vertxNext = vertx.runOnLoop || vertx.runOnContext;\n return useVertxTimer();\n } catch (e) {\n return useSetTimeout();\n }\n}\n\nvar scheduleFlush = void 0;\n// Decide what async method to use to triggering processing of queued callbacks:\nif (isNode) {\n scheduleFlush = useNextTick();\n} else if (BrowserMutationObserver) {\n scheduleFlush = useMutationObserver();\n} else if (isWorker) {\n scheduleFlush = useMessageChannel();\n} else if (browserWindow === undefined && typeof require === 'function') {\n scheduleFlush = attemptVertx();\n} else {\n scheduleFlush = useSetTimeout();\n}","import { invokeCallback, subscribe, FULFILLED, REJECTED, noop, makePromise, PROMISE_ID } from './-internal';\n\nimport { asap } from './asap';\n\nexport default function then(onFulfillment, onRejection) {\n var parent = this;\n\n var child = new this.constructor(noop);\n\n if (child[PROMISE_ID] === undefined) {\n makePromise(child);\n }\n\n var _state = parent._state;\n\n\n if (_state) {\n var callback = arguments[_state - 1];\n asap(function () {\n return invokeCallback(_state, child, callback, parent._result);\n });\n } else {\n subscribe(parent, child, onFulfillment, onRejection);\n }\n\n return child;\n}","import { noop, resolve as _resolve } from '../-internal';\n\n/**\n `Promise.resolve` returns a promise that will become resolved with the\n passed `value`. It is shorthand for the following:\n\n ```javascript\n let promise = new Promise(function(resolve, reject){\n resolve(1);\n });\n\n promise.then(function(value){\n // value === 1\n });\n ```\n\n Instead of writing the above, your code now simply becomes the following:\n\n ```javascript\n let promise = Promise.resolve(1);\n\n promise.then(function(value){\n // value === 1\n });\n ```\n\n @method resolve\n @static\n @param {Any} value value that the returned promise will be resolved with\n Useful for tooling.\n @return {Promise} a promise that will become fulfilled with the given\n `value`\n*/\nexport default function resolve(object) {\n /*jshint validthis:true */\n var Constructor = this;\n\n if (object && typeof object === 'object' && object.constructor === Constructor) {\n return object;\n }\n\n var promise = new Constructor(noop);\n _resolve(promise, object);\n return promise;\n}","import { objectOrFunction, isFunction } from './utils';\n\nimport { asap } from './asap';\n\nimport originalThen from './then';\nimport originalResolve from './promise/resolve';\n\nexport var PROMISE_ID = Math.random().toString(36).substring(16);\n\nfunction noop() {}\n\nvar PENDING = void 0;\nvar FULFILLED = 1;\nvar REJECTED = 2;\n\nvar GET_THEN_ERROR = new ErrorObject();\n\nfunction selfFulfillment() {\n return new TypeError(\"You cannot resolve a promise with itself\");\n}\n\nfunction cannotReturnOwn() {\n return new TypeError('A promises callback cannot return that same promise.');\n}\n\nfunction getThen(promise) {\n try {\n return promise.then;\n } catch (error) {\n GET_THEN_ERROR.error = error;\n return GET_THEN_ERROR;\n }\n}\n\nfunction tryThen(then, value, fulfillmentHandler, rejectionHandler) {\n try {\n then.call(value, fulfillmentHandler, rejectionHandler);\n } catch (e) {\n return e;\n }\n}\n\nfunction handleForeignThenable(promise, thenable, then) {\n asap(function (promise) {\n var sealed = false;\n var error = tryThen(then, thenable, function (value) {\n if (sealed) {\n return;\n }\n sealed = true;\n if (thenable !== value) {\n resolve(promise, value);\n } else {\n fulfill(promise, value);\n }\n }, function (reason) {\n if (sealed) {\n return;\n }\n sealed = true;\n\n reject(promise, reason);\n }, 'Settle: ' + (promise._label || ' unknown promise'));\n\n if (!sealed && error) {\n sealed = true;\n reject(promise, error);\n }\n }, promise);\n}\n\nfunction handleOwnThenable(promise, thenable) {\n if (thenable._state === FULFILLED) {\n fulfill(promise, thenable._result);\n } else if (thenable._state === REJECTED) {\n reject(promise, thenable._result);\n } else {\n subscribe(thenable, undefined, function (value) {\n return resolve(promise, value);\n }, function (reason) {\n return reject(promise, reason);\n });\n }\n}\n\nfunction handleMaybeThenable(promise, maybeThenable, then) {\n if (maybeThenable.constructor === promise.constructor && then === originalThen && maybeThenable.constructor.resolve === originalResolve) {\n handleOwnThenable(promise, maybeThenable);\n } else {\n if (then === GET_THEN_ERROR) {\n reject(promise, GET_THEN_ERROR.error);\n GET_THEN_ERROR.error = null;\n } else if (then === undefined) {\n fulfill(promise, maybeThenable);\n } else if (isFunction(then)) {\n handleForeignThenable(promise, maybeThenable, then);\n } else {\n fulfill(promise, maybeThenable);\n }\n }\n}\n\nfunction resolve(promise, value) {\n if (promise === value) {\n reject(promise, selfFulfillment());\n } else if (objectOrFunction(value)) {\n handleMaybeThenable(promise, value, getThen(value));\n } else {\n fulfill(promise, value);\n }\n}\n\nfunction publishRejection(promise) {\n if (promise._onerror) {\n promise._onerror(promise._result);\n }\n\n publish(promise);\n}\n\nfunction fulfill(promise, value) {\n if (promise._state !== PENDING) {\n return;\n }\n\n promise._result = value;\n promise._state = FULFILLED;\n\n if (promise._subscribers.length !== 0) {\n asap(publish, promise);\n }\n}\n\nfunction reject(promise, reason) {\n if (promise._state !== PENDING) {\n return;\n }\n promise._state = REJECTED;\n promise._result = reason;\n\n asap(publishRejection, promise);\n}\n\nfunction subscribe(parent, child, onFulfillment, onRejection) {\n var _subscribers = parent._subscribers;\n var length = _subscribers.length;\n\n\n parent._onerror = null;\n\n _subscribers[length] = child;\n _subscribers[length + FULFILLED] = onFulfillment;\n _subscribers[length + REJECTED] = onRejection;\n\n if (length === 0 && parent._state) {\n asap(publish, parent);\n }\n}\n\nfunction publish(promise) {\n var subscribers = promise._subscribers;\n var settled = promise._state;\n\n if (subscribers.length === 0) {\n return;\n }\n\n var child = void 0,\n callback = void 0,\n detail = promise._result;\n\n for (var i = 0; i < subscribers.length; i += 3) {\n child = subscribers[i];\n callback = subscribers[i + settled];\n\n if (child) {\n invokeCallback(settled, child, callback, detail);\n } else {\n callback(detail);\n }\n }\n\n promise._subscribers.length = 0;\n}\n\nfunction ErrorObject() {\n this.error = null;\n}\n\nvar TRY_CATCH_ERROR = new ErrorObject();\n\nfunction tryCatch(callback, detail) {\n try {\n return callback(detail);\n } catch (e) {\n TRY_CATCH_ERROR.error = e;\n return TRY_CATCH_ERROR;\n }\n}\n\nfunction invokeCallback(settled, promise, callback, detail) {\n var hasCallback = isFunction(callback),\n value = void 0,\n error = void 0,\n succeeded = void 0,\n failed = void 0;\n\n if (hasCallback) {\n value = tryCatch(callback, detail);\n\n if (value === TRY_CATCH_ERROR) {\n failed = true;\n error = value.error;\n value.error = null;\n } else {\n succeeded = true;\n }\n\n if (promise === value) {\n reject(promise, cannotReturnOwn());\n return;\n }\n } else {\n value = detail;\n succeeded = true;\n }\n\n if (promise._state !== PENDING) {\n // noop\n } else if (hasCallback && succeeded) {\n resolve(promise, value);\n } else if (failed) {\n reject(promise, error);\n } else if (settled === FULFILLED) {\n fulfill(promise, value);\n } else if (settled === REJECTED) {\n reject(promise, value);\n }\n}\n\nfunction initializePromise(promise, resolver) {\n try {\n resolver(function resolvePromise(value) {\n resolve(promise, value);\n }, function rejectPromise(reason) {\n reject(promise, reason);\n });\n } catch (e) {\n reject(promise, e);\n }\n}\n\nvar id = 0;\nfunction nextId() {\n return id++;\n}\n\nfunction makePromise(promise) {\n promise[PROMISE_ID] = id++;\n promise._state = undefined;\n promise._result = undefined;\n promise._subscribers = [];\n}\n\nexport { nextId, makePromise, getThen, noop, resolve, reject, fulfill, subscribe, publish, publishRejection, initializePromise, invokeCallback, FULFILLED, REJECTED, PENDING, handleMaybeThenable };","function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nimport { isArray, isMaybeThenable } from './utils';\n\nimport { noop, reject, fulfill, subscribe, FULFILLED, REJECTED, PENDING, getThen, handleMaybeThenable } from './-internal';\n\nimport then from './then';\nimport Promise from './promise';\nimport originalResolve from './promise/resolve';\nimport originalThen from './then';\nimport { makePromise, PROMISE_ID } from './-internal';\n\nfunction validationError() {\n return new Error('Array Methods must be provided an Array');\n}\n\nfunction validationError() {\n return new Error('Array Methods must be provided an Array');\n};\n\nvar Enumerator = function () {\n function Enumerator(Constructor, input) {\n this._instanceConstructor = Constructor;\n this.promise = new Constructor(noop);\n\n if (!this.promise[PROMISE_ID]) {\n makePromise(this.promise);\n }\n\n if (isArray(input)) {\n this.length = input.length;\n this._remaining = input.length;\n\n this._result = new Array(this.length);\n\n if (this.length === 0) {\n fulfill(this.promise, this._result);\n } else {\n this.length = this.length || 0;\n this._enumerate(input);\n if (this._remaining === 0) {\n fulfill(this.promise, this._result);\n }\n }\n } else {\n reject(this.promise, validationError());\n }\n }\n\n Enumerator.prototype._enumerate = function _enumerate(input) {\n for (var i = 0; this._state === PENDING && i < input.length; i++) {\n this._eachEntry(input[i], i);\n }\n };\n\n Enumerator.prototype._eachEntry = function _eachEntry(entry, i) {\n var c = this._instanceConstructor;\n var resolve = c.resolve;\n\n\n if (resolve === originalResolve) {\n var _then = getThen(entry);\n\n if (_then === originalThen && entry._state !== PENDING) {\n this._settledAt(entry._state, i, entry._result);\n } else if (typeof _then !== 'function') {\n this._remaining--;\n this._result[i] = entry;\n } else if (c === Promise) {\n var promise = new c(noop);\n handleMaybeThenable(promise, entry, _then);\n this._willSettleAt(promise, i);\n } else {\n this._willSettleAt(new c(function (resolve) {\n return resolve(entry);\n }), i);\n }\n } else {\n this._willSettleAt(resolve(entry), i);\n }\n };\n\n Enumerator.prototype._settledAt = function _settledAt(state, i, value) {\n var promise = this.promise;\n\n\n if (promise._state === PENDING) {\n this._remaining--;\n\n if (state === REJECTED) {\n reject(promise, value);\n } else {\n this._result[i] = value;\n }\n }\n\n if (this._remaining === 0) {\n fulfill(promise, this._result);\n }\n };\n\n Enumerator.prototype._willSettleAt = function _willSettleAt(promise, i) {\n var enumerator = this;\n\n subscribe(promise, undefined, function (value) {\n return enumerator._settledAt(FULFILLED, i, value);\n }, function (reason) {\n return enumerator._settledAt(REJECTED, i, reason);\n });\n };\n\n return Enumerator;\n}();\n\nexport default Enumerator;","import Enumerator from '../enumerator';\n\n/**\n `Promise.all` accepts an array of promises, and returns a new promise which\n is fulfilled with an array of fulfillment values for the passed promises, or\n rejected with the reason of the first passed promise to be rejected. It casts all\n elements of the passed iterable to promises as it runs this algorithm.\n\n Example:\n\n ```javascript\n let promise1 = resolve(1);\n let promise2 = resolve(2);\n let promise3 = resolve(3);\n let promises = [ promise1, promise2, promise3 ];\n\n Promise.all(promises).then(function(array){\n // The array here would be [ 1, 2, 3 ];\n });\n ```\n\n If any of the `promises` given to `all` are rejected, the first promise\n that is rejected will be given as an argument to the returned promises's\n rejection handler. For example:\n\n Example:\n\n ```javascript\n let promise1 = resolve(1);\n let promise2 = reject(new Error(\"2\"));\n let promise3 = reject(new Error(\"3\"));\n let promises = [ promise1, promise2, promise3 ];\n\n Promise.all(promises).then(function(array){\n // Code here never runs because there are rejected promises!\n }, function(error) {\n // error.message === \"2\"\n });\n ```\n\n @method all\n @static\n @param {Array} entries array of promises\n @param {String} label optional string for labeling the promise.\n Useful for tooling.\n @return {Promise} promise that is fulfilled when all `promises` have been\n fulfilled, or rejected if any of them become rejected.\n @static\n*/\nexport default function all(entries) {\n return new Enumerator(this, entries).promise;\n}","import { isArray } from \"../utils\";\n\n/**\n `Promise.race` returns a new promise which is settled in the same way as the\n first passed promise to settle.\n\n Example:\n\n ```javascript\n let promise1 = new Promise(function(resolve, reject){\n setTimeout(function(){\n resolve('promise 1');\n }, 200);\n });\n\n let promise2 = new Promise(function(resolve, reject){\n setTimeout(function(){\n resolve('promise 2');\n }, 100);\n });\n\n Promise.race([promise1, promise2]).then(function(result){\n // result === 'promise 2' because it was resolved before promise1\n // was resolved.\n });\n ```\n\n `Promise.race` is deterministic in that only the state of the first\n settled promise matters. For example, even if other promises given to the\n `promises` array argument are resolved, but the first settled promise has\n become rejected before the other promises became fulfilled, the returned\n promise will become rejected:\n\n ```javascript\n let promise1 = new Promise(function(resolve, reject){\n setTimeout(function(){\n resolve('promise 1');\n }, 200);\n });\n\n let promise2 = new Promise(function(resolve, reject){\n setTimeout(function(){\n reject(new Error('promise 2'));\n }, 100);\n });\n\n Promise.race([promise1, promise2]).then(function(result){\n // Code here never runs\n }, function(reason){\n // reason.message === 'promise 2' because promise 2 became rejected before\n // promise 1 became fulfilled\n });\n ```\n\n An example real-world use case is implementing timeouts:\n\n ```javascript\n Promise.race([ajax('foo.json'), timeout(5000)])\n ```\n\n @method race\n @static\n @param {Array} promises array of promises to observe\n Useful for tooling.\n @return {Promise} a promise which settles in the same way as the first passed\n promise to settle.\n*/\nexport default function race(entries) {\n /*jshint validthis:true */\n var Constructor = this;\n\n if (!isArray(entries)) {\n return new Constructor(function (_, reject) {\n return reject(new TypeError('You must pass an array to race.'));\n });\n } else {\n return new Constructor(function (resolve, reject) {\n var length = entries.length;\n for (var i = 0; i < length; i++) {\n Constructor.resolve(entries[i]).then(resolve, reject);\n }\n });\n }\n}","import { noop, reject as _reject } from '../-internal';\n\n/**\n `Promise.reject` returns a promise rejected with the passed `reason`.\n It is shorthand for the following:\n\n ```javascript\n let promise = new Promise(function(resolve, reject){\n reject(new Error('WHOOPS'));\n });\n\n promise.then(function(value){\n // Code here doesn't run because the promise is rejected!\n }, function(reason){\n // reason.message === 'WHOOPS'\n });\n ```\n\n Instead of writing the above, your code now simply becomes the following:\n\n ```javascript\n let promise = Promise.reject(new Error('WHOOPS'));\n\n promise.then(function(value){\n // Code here doesn't run because the promise is rejected!\n }, function(reason){\n // reason.message === 'WHOOPS'\n });\n ```\n\n @method reject\n @static\n @param {Any} reason value that the returned promise will be rejected with.\n Useful for tooling.\n @return {Promise} a promise rejected with the given `reason`.\n*/\nexport default function reject(reason) {\n /*jshint validthis:true */\n var Constructor = this;\n var promise = new Constructor(noop);\n _reject(promise, reason);\n return promise;\n}","function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nimport { isFunction } from './utils';\n\nimport { noop, nextId, PROMISE_ID, initializePromise } from './-internal';\n\nimport { asap, setAsap, setScheduler } from './asap';\n\nimport all from './promise/all';\nimport race from './promise/race';\nimport Resolve from './promise/resolve';\nimport Reject from './promise/reject';\nimport then from './then';\n\nfunction needsResolver() {\n throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');\n}\n\nfunction needsNew() {\n throw new TypeError(\"Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.\");\n}\n\n/**\n Promise objects represent the eventual result of an asynchronous operation. The\n primary way of interacting with a promise is through its `then` method, which\n registers callbacks to receive either a promise's eventual value or the reason\n why the promise cannot be fulfilled.\n\n Terminology\n -----------\n\n - `promise` is an object or function with a `then` method whose behavior conforms to this specification.\n - `thenable` is an object or function that defines a `then` method.\n - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).\n - `exception` is a value that is thrown using the throw statement.\n - `reason` is a value that indicates why a promise was rejected.\n - `settled` the final resting state of a promise, fulfilled or rejected.\n\n A promise can be in one of three states: pending, fulfilled, or rejected.\n\n Promises that are fulfilled have a fulfillment value and are in the fulfilled\n state. Promises that are rejected have a rejection reason and are in the\n rejected state. A fulfillment value is never a thenable.\n\n Promises can also be said to *resolve* a value. If this value is also a\n promise, then the original promise's settled state will match the value's\n settled state. So a promise that *resolves* a promise that rejects will\n itself reject, and a promise that *resolves* a promise that fulfills will\n itself fulfill.\n\n\n Basic Usage:\n ------------\n\n ```js\n let promise = new Promise(function(resolve, reject) {\n // on success\n resolve(value);\n\n // on failure\n reject(reason);\n });\n\n promise.then(function(value) {\n // on fulfillment\n }, function(reason) {\n // on rejection\n });\n ```\n\n Advanced Usage:\n ---------------\n\n Promises shine when abstracting away asynchronous interactions such as\n `XMLHttpRequest`s.\n\n ```js\n function getJSON(url) {\n return new Promise(function(resolve, reject){\n let xhr = new XMLHttpRequest();\n\n xhr.open('GET', url);\n xhr.onreadystatechange = handler;\n xhr.responseType = 'json';\n xhr.setRequestHeader('Accept', 'application/json');\n xhr.send();\n\n function handler() {\n if (this.readyState === this.DONE) {\n if (this.status === 200) {\n resolve(this.response);\n } else {\n reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));\n }\n }\n };\n });\n }\n\n getJSON('/posts.json').then(function(json) {\n // on fulfillment\n }, function(reason) {\n // on rejection\n });\n ```\n\n Unlike callbacks, promises are great composable primitives.\n\n ```js\n Promise.all([\n getJSON('/posts'),\n getJSON('/comments')\n ]).then(function(values){\n values[0] // => postsJSON\n values[1] // => commentsJSON\n\n return values;\n });\n ```\n\n @class Promise\n @param {Function} resolver\n Useful for tooling.\n @constructor\n*/\n\nvar Promise = function () {\n function Promise(resolver) {\n this[PROMISE_ID] = nextId();\n this._result = this._state = undefined;\n this._subscribers = [];\n\n if (noop !== resolver) {\n typeof resolver !== 'function' && needsResolver();\n this instanceof Promise ? initializePromise(this, resolver) : needsNew();\n }\n }\n\n /**\n The primary way of interacting with a promise is through its `then` method,\n which registers callbacks to receive either a promise's eventual value or the\n reason why the promise cannot be fulfilled.\n ```js\n findUser().then(function(user){\n // user is available\n }, function(reason){\n // user is unavailable, and you are given the reason why\n });\n ```\n Chaining\n --------\n The return value of `then` is itself a promise. This second, 'downstream'\n promise is resolved with the return value of the first promise's fulfillment\n or rejection handler, or rejected if the handler throws an exception.\n ```js\n findUser().then(function (user) {\n return user.name;\n }, function (reason) {\n return 'default name';\n }).then(function (userName) {\n // If `findUser` fulfilled, `userName` will be the user's name, otherwise it\n // will be `'default name'`\n });\n findUser().then(function (user) {\n throw new Error('Found user, but still unhappy');\n }, function (reason) {\n throw new Error('`findUser` rejected and we're unhappy');\n }).then(function (value) {\n // never reached\n }, function (reason) {\n // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.\n // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.\n });\n ```\n If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.\n ```js\n findUser().then(function (user) {\n throw new PedagogicalException('Upstream error');\n }).then(function (value) {\n // never reached\n }).then(function (value) {\n // never reached\n }, function (reason) {\n // The `PedgagocialException` is propagated all the way down to here\n });\n ```\n Assimilation\n ------------\n Sometimes the value you want to propagate to a downstream promise can only be\n retrieved asynchronously. This can be achieved by returning a promise in the\n fulfillment or rejection handler. The downstream promise will then be pending\n until the returned promise is settled. This is called *assimilation*.\n ```js\n findUser().then(function (user) {\n return findCommentsByAuthor(user);\n }).then(function (comments) {\n // The user's comments are now available\n });\n ```\n If the assimliated promise rejects, then the downstream promise will also reject.\n ```js\n findUser().then(function (user) {\n return findCommentsByAuthor(user);\n }).then(function (comments) {\n // If `findCommentsByAuthor` fulfills, we'll have the value here\n }, function (reason) {\n // If `findCommentsByAuthor` rejects, we'll have the reason here\n });\n ```\n Simple Example\n --------------\n Synchronous Example\n ```javascript\n let result;\n try {\n result = findResult();\n // success\n } catch(reason) {\n // failure\n }\n ```\n Errback Example\n ```js\n findResult(function(result, err){\n if (err) {\n // failure\n } else {\n // success\n }\n });\n ```\n Promise Example;\n ```javascript\n findResult().then(function(result){\n // success\n }, function(reason){\n // failure\n });\n ```\n Advanced Example\n --------------\n Synchronous Example\n ```javascript\n let author, books;\n try {\n author = findAuthor();\n books = findBooksByAuthor(author);\n // success\n } catch(reason) {\n // failure\n }\n ```\n Errback Example\n ```js\n function foundBooks(books) {\n }\n function failure(reason) {\n }\n findAuthor(function(author, err){\n if (err) {\n failure(err);\n // failure\n } else {\n try {\n findBoooksByAuthor(author, function(books, err) {\n if (err) {\n failure(err);\n } else {\n try {\n foundBooks(books);\n } catch(reason) {\n failure(reason);\n }\n }\n });\n } catch(error) {\n failure(err);\n }\n // success\n }\n });\n ```\n Promise Example;\n ```javascript\n findAuthor().\n then(findBooksByAuthor).\n then(function(books){\n // found books\n }).catch(function(reason){\n // something went wrong\n });\n ```\n @method then\n @param {Function} onFulfilled\n @param {Function} onRejected\n Useful for tooling.\n @return {Promise}\n */\n\n /**\n `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same\n as the catch block of a try/catch statement.\n ```js\n function findAuthor(){\n throw new Error('couldn't find that author');\n }\n // synchronous\n try {\n findAuthor();\n } catch(reason) {\n // something went wrong\n }\n // async with promises\n findAuthor().catch(function(reason){\n // something went wrong\n });\n ```\n @method catch\n @param {Function} onRejection\n Useful for tooling.\n @return {Promise}\n */\n\n\n Promise.prototype.catch = function _catch(onRejection) {\n return this.then(null, onRejection);\n };\n\n /**\n `finally` will be invoked regardless of the promise's fate just as native\n try/catch/finally behaves\n \n Synchronous example:\n \n ```js\n findAuthor() {\n if (Math.random() > 0.5) {\n throw new Error();\n }\n return new Author();\n }\n \n try {\n return findAuthor(); // succeed or fail\n } catch(error) {\n return findOtherAuther();\n } finally {\n // always runs\n // doesn't affect the return value\n }\n ```\n \n Asynchronous example:\n \n ```js\n findAuthor().catch(function(reason){\n return findOtherAuther();\n }).finally(function(){\n // author was either found, or not\n });\n ```\n \n @method finally\n @param {Function} callback\n @return {Promise}\n */\n\n\n Promise.prototype.finally = function _finally(callback) {\n var promise = this;\n var constructor = promise.constructor;\n\n return promise.then(function (value) {\n return constructor.resolve(callback()).then(function () {\n return value;\n });\n }, function (reason) {\n return constructor.resolve(callback()).then(function () {\n throw reason;\n });\n });\n };\n\n return Promise;\n}();\n\nPromise.prototype.then = then;\nexport default Promise;\nPromise.all = all;\nPromise.race = race;\nPromise.resolve = Resolve;\nPromise.reject = Reject;\nPromise._setScheduler = setScheduler;\nPromise._setAsap = setAsap;\nPromise._asap = asap;","/*global self*/\nimport Promise from './promise';\n\nexport default function polyfill() {\n var local = void 0;\n\n if (typeof global !== 'undefined') {\n local = global;\n } else if (typeof self !== 'undefined') {\n local = self;\n } else {\n try {\n local = Function('return this')();\n } catch (e) {\n throw new Error('polyfill failed because global object is unavailable in this environment');\n }\n }\n\n var P = local.Promise;\n\n if (P) {\n var promiseToString = null;\n try {\n promiseToString = Object.prototype.toString.call(P.resolve());\n } catch (e) {\n // silently ignored\n }\n\n if (promiseToString === '[object Promise]' && !P.cast) {\n return;\n }\n }\n\n local.Promise = Promise;\n}","import Promise from './es6-promise/promise';\nimport polyfill from './es6-promise/polyfill';\n\n// Strange compat..\nPromise.polyfill = polyfill;\nPromise.Promise = Promise;\nexport default Promise;","import Promise from './es6-promise';\nPromise.polyfill();\nexport default Promise;","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nexport class HttpError extends Error {\n statusCode: number;\n constructor(errorMessage: string, statusCode: number) {\n super(errorMessage);\n this.statusCode = statusCode;\n }\n}\n\nexport class TimeoutError extends Error {\n constructor(errorMessage: string = \"A timeout occurred.\") {\n super(errorMessage);\n }\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { TimeoutError, HttpError } from \"./Errors\";\nimport { AbortSignal } from \"./AbortController\";\n\nexport interface HttpRequest {\n method?: string,\n url?: string,\n content?: string | ArrayBuffer,\n headers?: Map,\n responseType?: XMLHttpRequestResponseType,\n abortSignal?: AbortSignal,\n timeout?: number,\n}\n\nexport class HttpResponse {\n constructor(statusCode: number, statusText: string, content: string);\n constructor(statusCode: number, statusText: string, content: ArrayBuffer);\n constructor(\n public readonly statusCode: number,\n public readonly statusText: string,\n public readonly content: string | ArrayBuffer) {\n }\n}\n\nexport abstract class HttpClient {\n get(url: string): Promise;\n get(url: string, options: HttpRequest): Promise;\n get(url: string, options?: HttpRequest): Promise {\n return this.send({\n ...options,\n method: \"GET\",\n url: url,\n });\n }\n\n post(url: string): Promise;\n post(url: string, options: HttpRequest): Promise;\n post(url: string, options?: HttpRequest): Promise {\n return this.send({\n ...options,\n method: \"POST\",\n url: url,\n });\n }\n\n abstract send(request: HttpRequest): Promise;\n}\n\nexport class DefaultHttpClient extends HttpClient {\n send(request: HttpRequest): Promise {\n return new Promise((resolve, reject) => {\n let xhr = new XMLHttpRequest();\n\n xhr.open(request.method, request.url, true);\n xhr.setRequestHeader(\"X-Requested-With\", \"XMLHttpRequest\");\n\n if (request.headers) {\n request.headers.forEach((value, header) => xhr.setRequestHeader(header, value));\n }\n\n if (request.responseType) {\n xhr.responseType = request.responseType;\n }\n\n if (request.abortSignal) {\n request.abortSignal.onabort = () => {\n xhr.abort();\n };\n }\n\n if (request.timeout) {\n xhr.timeout = request.timeout;\n }\n\n xhr.onload = () => {\n if (request.abortSignal) {\n request.abortSignal.onabort = null;\n }\n\n if (xhr.status >= 200 && xhr.status < 300) {\n resolve(new HttpResponse(xhr.status, xhr.statusText, xhr.response || xhr.responseText))\n }\n else {\n reject(new HttpError(xhr.statusText, xhr.status));\n }\n };\n\n xhr.onerror = () => {\n reject(new HttpError(xhr.statusText, xhr.status));\n }\n\n xhr.ontimeout = () => {\n reject(new TimeoutError());\n }\n\n xhr.send(request.content || \"\");\n });\n }\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nexport enum LogLevel {\n Trace = 0,\n Information,\n Warning,\n Error,\n None\n}\n\nexport interface ILogger {\n log(logLevel: LogLevel, message: string): void;\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\n// Rough polyfill of https://developer.mozilla.org/en-US/docs/Web/API/AbortController\n// We don't actually ever use the API being polyfilled, we always use the polyfill because\n// it's a very new API right now.\n\nexport class AbortController implements AbortSignal {\n private isAborted: boolean = false;\n public onabort: () => void;\n\n abort() {\n if (!this.isAborted) {\n this.isAborted = true;\n if (this.onabort) {\n this.onabort();\n }\n }\n }\n\n get signal(): AbortSignal {\n return this;\n }\n\n get aborted(): boolean {\n return this.isAborted;\n }\n}\n\nexport interface AbortSignal {\n aborted: boolean;\n onabort: () => void;\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { DataReceived, TransportClosed } from \"./Common\";\nimport { HttpClient, HttpRequest } from \"./HttpClient\";\nimport { HttpError, TimeoutError } from \"./Errors\";\nimport { ILogger, LogLevel } from \"./ILogger\";\nimport { IConnection } from \"./IConnection\";\nimport { AbortController } from \"./AbortController\";\n\nexport enum TransportType {\n WebSockets,\n ServerSentEvents,\n LongPolling\n}\n\nexport const enum TransferMode {\n Text = 1,\n Binary\n}\n\nexport interface ITransport {\n connect(url: string, requestedTransferMode: TransferMode, connection: IConnection): Promise;\n send(data: any): Promise;\n stop(): Promise;\n onreceive: DataReceived;\n onclose: TransportClosed;\n}\n\nexport class WebSocketTransport implements ITransport {\n private readonly logger: ILogger;\n private readonly accessTokenFactory: () => string;\n private webSocket: WebSocket;\n\n constructor(accessTokenFactory: () => string, logger: ILogger) {\n this.logger = logger;\n this.accessTokenFactory = accessTokenFactory || (() => null);\n }\n\n connect(url: string, requestedTransferMode: TransferMode, connection: IConnection): Promise {\n\n return new Promise((resolve, reject) => {\n url = url.replace(/^http/, \"ws\");\n let token = this.accessTokenFactory();\n if (token) {\n url += (url.indexOf(\"?\") < 0 ? \"?\" : \"&\") + `access_token=${encodeURIComponent(token)}`;\n }\n\n let webSocket = new WebSocket(url);\n if (requestedTransferMode == TransferMode.Binary) {\n webSocket.binaryType = \"arraybuffer\";\n }\n\n webSocket.onopen = (event: Event) => {\n this.logger.log(LogLevel.Information, `WebSocket connected to ${url}`);\n this.webSocket = webSocket;\n resolve(requestedTransferMode);\n };\n\n webSocket.onerror = (event: Event) => {\n reject();\n };\n\n webSocket.onmessage = (message: MessageEvent) => {\n this.logger.log(LogLevel.Trace, `(WebSockets transport) data received: ${message.data}`);\n if (this.onreceive) {\n this.onreceive(message.data);\n }\n }\n\n webSocket.onclose = (event: CloseEvent) => {\n // webSocket will be null if the transport did not start successfully\n if (this.onclose && this.webSocket) {\n if (event.wasClean === false || event.code !== 1000) {\n this.onclose(new Error(`Websocket closed with status code: ${event.code} (${event.reason})`));\n }\n else {\n this.onclose();\n }\n }\n }\n });\n }\n\n send(data: any): Promise {\n if (this.webSocket && this.webSocket.readyState === WebSocket.OPEN) {\n this.webSocket.send(data);\n return Promise.resolve();\n }\n\n return Promise.reject(\"WebSocket is not in the OPEN state\");\n }\n\n stop(): Promise {\n if (this.webSocket) {\n this.webSocket.close();\n this.webSocket = null;\n }\n return Promise.resolve();\n }\n\n onreceive: DataReceived;\n onclose: TransportClosed;\n}\n\nexport class ServerSentEventsTransport implements ITransport {\n private readonly httpClient: HttpClient;\n private readonly accessTokenFactory: () => string;\n private readonly logger: ILogger;\n private eventSource: EventSource;\n private url: string;\n\n constructor(httpClient: HttpClient, accessTokenFactory: () => string, logger: ILogger) {\n this.httpClient = httpClient;\n this.accessTokenFactory = accessTokenFactory || (() => null);\n this.logger = logger;\n }\n\n connect(url: string, requestedTransferMode: TransferMode, connection: IConnection): Promise {\n if (typeof (EventSource) === \"undefined\") {\n Promise.reject(\"EventSource not supported by the browser.\");\n }\n\n this.url = url;\n return new Promise((resolve, reject) => {\n let token = this.accessTokenFactory();\n if (token) {\n url += (url.indexOf(\"?\") < 0 ? \"?\" : \"&\") + `access_token=${encodeURIComponent(token)}`;\n }\n\n let eventSource = new EventSource(url);\n\n try {\n eventSource.onmessage = (e: MessageEvent) => {\n if (this.onreceive) {\n try {\n this.logger.log(LogLevel.Trace, `(SSE transport) data received: ${e.data}`);\n this.onreceive(e.data);\n } catch (error) {\n if (this.onclose) {\n this.onclose(error);\n }\n return;\n }\n }\n };\n\n eventSource.onerror = (e: any) => {\n reject();\n\n // don't report an error if the transport did not start successfully\n if (this.eventSource && this.onclose) {\n this.onclose(new Error(e.message || \"Error occurred\"));\n }\n }\n\n eventSource.onopen = () => {\n this.logger.log(LogLevel.Information, `SSE connected to ${this.url}`);\n this.eventSource = eventSource;\n // SSE is a text protocol\n resolve(TransferMode.Text);\n }\n }\n catch (e) {\n return Promise.reject(e);\n }\n });\n }\n\n async send(data: any): Promise {\n return send(this.httpClient, this.url, this.accessTokenFactory, data);\n }\n\n stop(): Promise {\n if (this.eventSource) {\n this.eventSource.close();\n this.eventSource = null;\n }\n return Promise.resolve();\n }\n\n onreceive: DataReceived;\n onclose: TransportClosed;\n}\n\nexport class LongPollingTransport implements ITransport {\n private readonly httpClient: HttpClient;\n private readonly accessTokenFactory: () => string;\n private readonly logger: ILogger;\n\n private url: string;\n private pollXhr: XMLHttpRequest;\n private pollAbort: AbortController;\n\n constructor(httpClient: HttpClient, accessTokenFactory: () => string, logger: ILogger) {\n this.httpClient = httpClient;\n this.accessTokenFactory = accessTokenFactory || (() => null);\n this.logger = logger;\n this.pollAbort = new AbortController();\n }\n\n connect(url: string, requestedTransferMode: TransferMode, connection: IConnection): Promise {\n this.url = url;\n\n // Set a flag indicating we have inherent keep-alive in this transport.\n connection.features.inherentKeepAlive = true;\n\n if (requestedTransferMode === TransferMode.Binary && (typeof new XMLHttpRequest().responseType !== \"string\")) {\n // This will work if we fix: https://github.com/aspnet/SignalR/issues/742\n throw new Error(\"Binary protocols over XmlHttpRequest not implementing advanced features are not supported.\");\n }\n\n this.poll(this.url, requestedTransferMode);\n return Promise.resolve(requestedTransferMode);\n }\n\n private async poll(url: string, transferMode: TransferMode): Promise {\n let pollOptions: HttpRequest = {\n timeout: 120000,\n abortSignal: this.pollAbort.signal,\n headers: new Map(),\n };\n\n if (transferMode === TransferMode.Binary) {\n pollOptions.responseType = \"arraybuffer\";\n }\n\n let token = this.accessTokenFactory();\n if (token) {\n pollOptions.headers.set(\"Authorization\", `Bearer ${token}`);\n }\n\n while (!this.pollAbort.signal.aborted) {\n try {\n let pollUrl = `${url}&_=${Date.now()}`;\n this.logger.log(LogLevel.Trace, `(LongPolling transport) polling: ${pollUrl}`);\n let response = await this.httpClient.get(pollUrl, pollOptions)\n if (response.statusCode === 204) {\n this.logger.log(LogLevel.Information, \"(LongPolling transport) Poll terminated by server\");\n\n // Poll terminated by server\n if (this.onclose) {\n this.onclose();\n }\n this.pollAbort.abort();\n }\n else if (response.statusCode !== 200) {\n this.logger.log(LogLevel.Error, `(LongPolling transport) Unexpected response code: ${response.statusCode}`);\n\n // Unexpected status code\n if (this.onclose) {\n this.onclose(new HttpError(response.statusText, response.statusCode));\n }\n this.pollAbort.abort();\n }\n else {\n // Process the response\n if (response.content) {\n this.logger.log(LogLevel.Trace, `(LongPolling transport) data received: ${response.content}`);\n if (this.onreceive) {\n this.onreceive(response.content);\n }\n }\n else {\n // This is another way timeout manifest.\n this.logger.log(LogLevel.Trace, \"(LongPolling transport) Poll timed out, reissuing.\");\n }\n }\n } catch (e) {\n if (e instanceof TimeoutError) {\n // Ignore timeouts and reissue the poll.\n this.logger.log(LogLevel.Trace, \"(LongPolling transport) Poll timed out, reissuing.\");\n } else {\n // Close the connection with the error as the result.\n if (this.onclose) {\n this.onclose(e);\n }\n this.pollAbort.abort();\n }\n }\n }\n }\n\n async send(data: any): Promise {\n return send(this.httpClient, this.url, this.accessTokenFactory, data);\n }\n\n stop(): Promise {\n this.pollAbort.abort();\n return Promise.resolve();\n }\n\n onreceive: DataReceived;\n onclose: TransportClosed;\n}\n\nasync function send(httpClient: HttpClient, url: string, accessTokenFactory: () => string, content: string | ArrayBuffer): Promise {\n let headers;\n let token = accessTokenFactory();\n if (token) {\n headers = new Map();\n headers.set(\"Authorization\", `Bearer ${accessTokenFactory()}`)\n }\n\n await httpClient.post(url, {\n content,\n headers\n });\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { ILogger, LogLevel } from \"./ILogger\"\n\nexport class NullLogger implements ILogger {\n log(logLevel: LogLevel, message: string): void {\n }\n}\n\nexport class ConsoleLogger implements ILogger {\n private readonly minimumLogLevel: LogLevel;\n\n constructor(minimumLogLevel: LogLevel) {\n this.minimumLogLevel = minimumLogLevel;\n }\n\n log(logLevel: LogLevel, message: string): void {\n if (logLevel >= this.minimumLogLevel) {\n switch (logLevel) {\n case LogLevel.Error:\n console.error(`${LogLevel[logLevel]}: ${message}`);\n break;\n case LogLevel.Warning:\n console.warn(`${LogLevel[logLevel]}: ${message}`);\n break;\n case LogLevel.Information:\n console.info(`${LogLevel[logLevel]}: ${message}`);\n break;\n default:\n console.log(`${LogLevel[logLevel]}: ${message}`);\n break;\n }\n }\n }\n}\n\nexport namespace LoggerFactory {\n export function createLogger(logging?: ILogger | LogLevel) {\n if (logging === undefined) {\n return new ConsoleLogger(LogLevel.Information);\n }\n\n if (logging === null) {\n return new NullLogger();\n }\n\n if ((logging).log) {\n return logging;\n }\n\n return new ConsoleLogger(logging);\n }\n}","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { DataReceived, ConnectionClosed } from \"./Common\"\nimport { IConnection } from \"./IConnection\"\nimport { ITransport, TransferMode, TransportType, WebSocketTransport, ServerSentEventsTransport, LongPollingTransport } from \"./Transports\"\nimport { HttpClient, DefaultHttpClient } from \"./HttpClient\"\nimport { ILogger, LogLevel } from \"./ILogger\"\nimport { LoggerFactory } from \"./Loggers\"\n\nexport interface IHttpConnectionOptions {\n httpClient?: HttpClient;\n transport?: TransportType | ITransport;\n logger?: ILogger | LogLevel;\n accessTokenFactory?: () => string;\n}\n\nconst enum ConnectionState {\n Connecting,\n Connected,\n Disconnected\n}\n\ninterface INegotiateResponse {\n connectionId: string\n availableTransports: string[]\n}\n\nexport class HttpConnection implements IConnection {\n private connectionState: ConnectionState;\n private baseUrl: string;\n private url: string;\n private readonly httpClient: HttpClient;\n private readonly logger: ILogger;\n private readonly options: IHttpConnectionOptions;\n private transport: ITransport;\n private connectionId: string;\n private startPromise: Promise;\n\n readonly features: any = {};\n\n constructor(url: string, options: IHttpConnectionOptions = {}) {\n this.logger = LoggerFactory.createLogger(options.logger);\n this.baseUrl = this.resolveUrl(url);\n\n options = options || {};\n options.accessTokenFactory = options.accessTokenFactory || (() => null);\n\n this.httpClient = options.httpClient || new DefaultHttpClient();\n this.connectionState = ConnectionState.Disconnected;\n this.options = options;\n }\n\n async start(): Promise {\n if (this.connectionState !== ConnectionState.Disconnected) {\n return Promise.reject(new Error(\"Cannot start a connection that is not in the 'Disconnected' state.\"));\n }\n\n this.connectionState = ConnectionState.Connecting;\n\n this.startPromise = this.startInternal();\n return this.startPromise;\n }\n\n private async startInternal(): Promise {\n try {\n if (this.options.transport === TransportType.WebSockets) {\n // No need to add a connection ID in this case\n this.url = this.baseUrl;\n this.transport = this.createTransport(this.options.transport, [TransportType[TransportType.WebSockets]]);\n }\n else {\n let headers;\n let token = this.options.accessTokenFactory();\n if (token) {\n headers = new Map();\n headers.set(\"Authorization\", `Bearer ${token}`);\n }\n\n let negotiatePayload = await this.httpClient.post(this.resolveNegotiateUrl(this.baseUrl), {\n content: \"\",\n headers\n });\n\n let negotiateResponse: INegotiateResponse = JSON.parse(negotiatePayload.content);\n this.connectionId = negotiateResponse.connectionId;\n\n // the user tries to stop the the connection when it is being started\n if (this.connectionState == ConnectionState.Disconnected) {\n return;\n }\n\n if (this.connectionId) {\n this.url = this.baseUrl + (this.baseUrl.indexOf(\"?\") === -1 ? \"?\" : \"&\") + `id=${this.connectionId}`;\n this.transport = this.createTransport(this.options.transport, negotiateResponse.availableTransports);\n }\n }\n\n this.transport.onreceive = this.onreceive;\n this.transport.onclose = e => this.stopConnection(true, e);\n\n let requestedTransferMode =\n this.features.transferMode === TransferMode.Binary\n ? TransferMode.Binary\n : TransferMode.Text;\n\n this.features.transferMode = await this.transport.connect(this.url, requestedTransferMode, this);\n\n // only change the state if we were connecting to not overwrite\n // the state if the connection is already marked as Disconnected\n this.changeState(ConnectionState.Connecting, ConnectionState.Connected);\n }\n catch (e) {\n this.logger.log(LogLevel.Error, \"Failed to start the connection. \" + e);\n this.connectionState = ConnectionState.Disconnected;\n this.transport = null;\n throw e;\n };\n }\n\n private createTransport(transport: TransportType | ITransport, availableTransports: string[]): ITransport {\n if ((transport === null || transport === undefined) && availableTransports.length > 0) {\n transport = TransportType[availableTransports[0]];\n }\n if (transport === TransportType.WebSockets && availableTransports.indexOf(TransportType[transport]) >= 0) {\n return new WebSocketTransport(this.options.accessTokenFactory, this.logger);\n }\n if (transport === TransportType.ServerSentEvents && availableTransports.indexOf(TransportType[transport]) >= 0) {\n return new ServerSentEventsTransport(this.httpClient, this.options.accessTokenFactory, this.logger);\n }\n if (transport === TransportType.LongPolling && availableTransports.indexOf(TransportType[transport]) >= 0) {\n return new LongPollingTransport(this.httpClient, this.options.accessTokenFactory, this.logger);\n }\n\n if (this.isITransport(transport)) {\n return transport;\n }\n\n throw new Error(\"No available transports found.\");\n }\n\n private isITransport(transport: any): transport is ITransport {\n return typeof (transport) === \"object\" && \"connect\" in transport;\n }\n\n private changeState(from: ConnectionState, to: ConnectionState): Boolean {\n if (this.connectionState == from) {\n this.connectionState = to;\n return true;\n }\n return false;\n }\n\n send(data: any): Promise {\n if (this.connectionState != ConnectionState.Connected) {\n throw new Error(\"Cannot send data if the connection is not in the 'Connected' State\");\n }\n\n return this.transport.send(data);\n }\n\n async stop(error?: Error): Promise {\n let previousState = this.connectionState;\n this.connectionState = ConnectionState.Disconnected;\n\n try {\n await this.startPromise;\n }\n catch (e) {\n // this exception is returned to the user as a rejected Promise from the start method\n }\n this.stopConnection(/*raiseClosed*/ previousState == ConnectionState.Connected, error);\n }\n\n private stopConnection(raiseClosed: Boolean, error?: Error) {\n if (this.transport) {\n this.transport.stop();\n this.transport = null;\n }\n\n if (error) {\n this.logger.log(LogLevel.Error, `Connection disconnected with error '${error}'.`);\n } else {\n this.logger.log(LogLevel.Information, \"Connection disconnected.\");\n }\n\n this.connectionState = ConnectionState.Disconnected;\n\n if (raiseClosed && this.onclose) {\n this.onclose(error);\n }\n }\n\n private resolveUrl(url: string): string {\n // startsWith is not supported in IE\n if (url.lastIndexOf(\"https://\", 0) === 0 || url.lastIndexOf(\"http://\", 0) === 0) {\n return url;\n }\n\n if (typeof window === 'undefined' || !window || !window.document) {\n throw new Error(`Cannot resolve '${url}'.`);\n }\n\n let parser = window.document.createElement(\"a\");\n parser.href = url;\n\n let baseUrl = (!parser.protocol || parser.protocol === \":\")\n ? `${window.document.location.protocol}//${(parser.host || window.document.location.host)}`\n : `${parser.protocol}//${parser.host}`;\n\n if (!url || url[0] != '/') {\n url = '/' + url;\n }\n\n let normalizedUrl = baseUrl + url;\n this.logger.log(LogLevel.Information, `Normalizing '${url}' to '${normalizedUrl}'`);\n return normalizedUrl;\n }\n\n private resolveNegotiateUrl(url: string): string {\n let index = url.indexOf(\"?\");\n let negotiateUrl = url.substring(0, index === -1 ? url.length : index);\n if (negotiateUrl[negotiateUrl.length - 1] !== \"/\") {\n negotiateUrl += \"/\";\n }\n negotiateUrl += \"negotiate\";\n negotiateUrl += index === -1 ? \"\" : url.substring(index);\n return negotiateUrl;\n }\n\n onreceive: DataReceived;\n onclose: ConnectionClosed;\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\n// TODO: Seamless RxJs integration\n// From RxJs: https://github.com/ReactiveX/rxjs/blob/master/src/Observer.ts\nexport interface Observer {\n closed?: boolean;\n next: (value: T) => void;\n error?: (err: any) => void;\n complete?: () => void;\n}\n\nexport class Subscription {\n subject: Subject;\n observer: Observer;\n\n constructor(subject: Subject, observer: Observer) {\n this.subject = subject;\n this.observer = observer;\n }\n\n public dispose(): void {\n let index: number = this.subject.observers.indexOf(this.observer);\n if (index > -1) {\n this.subject.observers.splice(index, 1);\n }\n\n if (this.subject.observers.length === 0) {\n this.subject.cancelCallback().catch((_) => { });\n }\n }\n}\n\nexport interface Observable {\n subscribe(observer: Observer): Subscription;\n}\n\nexport class Subject implements Observable {\n observers: Observer[];\n cancelCallback: () => Promise;\n\n constructor(cancelCallback: () => Promise) {\n this.observers = [];\n this.cancelCallback = cancelCallback;\n }\n\n public next(item: T): void {\n for (let observer of this.observers) {\n observer.next(item);\n }\n }\n\n public error(err: any): void {\n for (let observer of this.observers) {\n if (observer.error) {\n observer.error(err);\n }\n }\n }\n\n public complete(): void {\n for (let observer of this.observers) {\n if (observer.complete) {\n observer.complete();\n }\n }\n }\n\n public subscribe(observer: Observer): Subscription {\n this.observers.push(observer);\n return new Subscription(this, observer);\n }\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nexport class TextMessageFormat {\n static RecordSeparator = String.fromCharCode(0x1e);\n\n static write(output: string): string {\n return `${output}${TextMessageFormat.RecordSeparator}`;\n }\n\n static parse(input: string): string[] {\n if (input[input.length - 1] != TextMessageFormat.RecordSeparator) {\n throw new Error(\"Message is incomplete.\");\n }\n\n let messages = input.split(TextMessageFormat.RecordSeparator);\n messages.pop();\n return messages;\n }\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { TextMessageFormat } from \"./TextMessageFormat\";\nimport { IHubProtocol, ProtocolType, HubMessage } from \"./IHubProtocol\";\n\nexport const JSON_HUB_PROTOCOL_NAME: string = \"json\";\n\nexport class JsonHubProtocol implements IHubProtocol {\n\n readonly name: string = JSON_HUB_PROTOCOL_NAME;\n\n readonly type: ProtocolType = ProtocolType.Text;\n\n parseMessages(input: string): HubMessage[] {\n if (!input) {\n return [];\n }\n\n // Parse the messages\n let messages = TextMessageFormat.parse(input);\n let hubMessages = [];\n for (var i = 0; i < messages.length; ++i) {\n hubMessages.push(JSON.parse(messages[i]));\n }\n\n return hubMessages;\n }\n\n writeMessage(message: HubMessage): string {\n return TextMessageFormat.write(JSON.stringify(message));\n }\n}","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { IHubProtocol, HubMessage, ProtocolType } from \"./IHubProtocol\"\n\nexport class Base64EncodedHubProtocol implements IHubProtocol {\n private wrappedProtocol: IHubProtocol;\n\n constructor(protocol: IHubProtocol) {\n this.wrappedProtocol = protocol;\n this.name = this.wrappedProtocol.name;\n this.type = ProtocolType.Text;\n }\n\n readonly name: string;\n readonly type: ProtocolType;\n\n parseMessages(input: any): HubMessage[] {\n // The format of the message is `size:message;`\n let pos = input.indexOf(\":\");\n if (pos == -1 || input[input.length - 1] != ';') {\n throw new Error(\"Invalid payload.\");\n }\n\n let lenStr = input.substring(0, pos);\n if (!/^[0-9]+$/.test(lenStr)) {\n throw new Error(`Invalid length: '${lenStr}'`);\n }\n\n let messageSize = parseInt(lenStr, 10);\n // 2 accounts for ':' after message size and trailing ';'\n if (messageSize != input.length - pos - 2) {\n throw new Error(\"Invalid message size.\");\n }\n\n let encodedMessage = input.substring(pos + 1, input.length - 1);\n\n // atob/btoa are browsers APIs but they can be polyfilled. If this becomes problematic we can use\n // base64-js module\n let s = atob(encodedMessage);\n let payload = new Uint8Array(s.length);\n for (let i = 0; i < payload.length; i++) {\n payload[i] = s.charCodeAt(i);\n }\n return this.wrappedProtocol.parseMessages(payload.buffer);\n }\n\n writeMessage(message: HubMessage): any {\n let payload = new Uint8Array(this.wrappedProtocol.writeMessage(message));\n let s = \"\";\n for (let i = 0; i < payload.byteLength; i++) {\n s += String.fromCharCode(payload[i]);\n }\n // atob/btoa are browsers APIs but they can be polyfilled. If this becomes problematic we can use\n // base64-js module\n let encodedMessage = btoa(s);\n\n return `${encodedMessage.length.toString()}:${encodedMessage};`;\n }\n}","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\nimport { ConnectionClosed } from \"./Common\"\nimport { IConnection } from \"./IConnection\"\nimport { HttpConnection, IHttpConnectionOptions } from \"./HttpConnection\"\nimport { TransportType, TransferMode } from \"./Transports\"\nimport { Subject, Observable } from \"./Observable\"\nimport { IHubProtocol, ProtocolType, MessageType, HubMessage, CompletionMessage, ResultMessage, InvocationMessage, StreamInvocationMessage, NegotiationMessage, CancelInvocation } from \"./IHubProtocol\";\nimport { JsonHubProtocol } from \"./JsonHubProtocol\";\nimport { TextMessageFormat } from \"./TextMessageFormat\"\nimport { Base64EncodedHubProtocol } from \"./Base64EncodedHubProtocol\"\nimport { ILogger, LogLevel } from \"./ILogger\"\nimport { ConsoleLogger, NullLogger, LoggerFactory } from \"./Loggers\"\n\nexport { JsonHubProtocol }\n\nexport interface IHubConnectionOptions extends IHttpConnectionOptions {\n protocol?: IHubProtocol;\n timeoutInMilliseconds?: number;\n}\n\nconst DEFAULT_TIMEOUT_IN_MS: number = 30 * 1000;\n\nexport class HubConnection {\n private readonly connection: IConnection;\n private readonly logger: ILogger;\n private protocol: IHubProtocol;\n private callbacks: Map void>;\n private methods: Map void)[]>;\n private id: number;\n private closedCallbacks: ConnectionClosed[];\n private timeoutHandle: NodeJS.Timer;\n private timeoutInMilliseconds: number;\n\n constructor(url: string, options?: IHubConnectionOptions);\n constructor(connection: IConnection, options?: IHubConnectionOptions);\n constructor(urlOrConnection: string | IConnection, options: IHubConnectionOptions = {}) {\n options = options || {};\n\n this.timeoutInMilliseconds = options.timeoutInMilliseconds || DEFAULT_TIMEOUT_IN_MS;\n\n if (typeof urlOrConnection === \"string\") {\n this.connection = new HttpConnection(urlOrConnection, options);\n }\n else {\n this.connection = urlOrConnection;\n }\n\n this.logger = LoggerFactory.createLogger(options.logger);\n\n this.protocol = options.protocol || new JsonHubProtocol();\n this.connection.onreceive = (data: any) => this.processIncomingData(data);\n this.connection.onclose = (error?: Error) => this.connectionClosed(error);\n\n this.callbacks = new Map void>();\n this.methods = new Map void)[]>();\n this.closedCallbacks = [];\n this.id = 0;\n }\n\n private processIncomingData(data: any) {\n if (this.timeoutHandle !== undefined) {\n clearTimeout(this.timeoutHandle);\n }\n\n // Parse the messages\n let messages = this.protocol.parseMessages(data);\n\n for (var i = 0; i < messages.length; ++i) {\n var message = messages[i];\n\n switch (message.type) {\n case MessageType.Invocation:\n this.invokeClientMethod(message);\n break;\n case MessageType.StreamItem:\n case MessageType.Completion:\n let callback = this.callbacks.get((message).invocationId);\n if (callback != null) {\n if (message.type === MessageType.Completion) {\n this.callbacks.delete((message).invocationId);\n }\n callback(message);\n }\n break;\n case MessageType.Ping:\n // Don't care about pings\n break;\n default:\n this.logger.log(LogLevel.Warning, \"Invalid message type: \" + data);\n break;\n }\n }\n\n this.configureTimeout();\n }\n\n private configureTimeout() {\n if (!this.connection.features || !this.connection.features.inherentKeepAlive) {\n // Set the timeout timer\n this.timeoutHandle = setTimeout(() => this.serverTimeout(), this.timeoutInMilliseconds);\n }\n }\n\n private serverTimeout() {\n // The server hasn't talked to us in a while. It doesn't like us anymore ... :(\n // Terminate the connection\n this.connection.stop(new Error(\"Server timeout elapsed without receiving a message from the server.\"));\n }\n\n private invokeClientMethod(invocationMessage: InvocationMessage) {\n let methods = this.methods.get(invocationMessage.target.toLowerCase());\n if (methods) {\n methods.forEach(m => m.apply(this, invocationMessage.arguments));\n if (invocationMessage.invocationId) {\n // This is not supported in v1. So we return an error to avoid blocking the server waiting for the response.\n let message = \"Server requested a response, which is not supported in this version of the client.\"\n this.logger.log(LogLevel.Error, message);\n this.connection.stop(new Error(message))\n }\n }\n else {\n this.logger.log(LogLevel.Warning, `No client method with the name '${invocationMessage.target}' found.`);\n }\n }\n\n private connectionClosed(error?: Error) {\n this.callbacks.forEach(callback => {\n callback(undefined, error ? error : new Error(\"Invocation canceled due to connection being closed.\"));\n });\n this.callbacks.clear();\n\n this.closedCallbacks.forEach(c => c.apply(this, [error]));\n\n this.cleanupTimeout();\n }\n\n async start(): Promise {\n let requestedTransferMode =\n (this.protocol.type === ProtocolType.Binary)\n ? TransferMode.Binary\n : TransferMode.Text;\n\n this.connection.features.transferMode = requestedTransferMode\n await this.connection.start();\n var actualTransferMode = this.connection.features.transferMode;\n\n await this.connection.send(\n TextMessageFormat.write(\n JSON.stringify({ protocol: this.protocol.name })));\n\n this.logger.log(LogLevel.Information, `Using HubProtocol '${this.protocol.name}'.`);\n\n if (requestedTransferMode === TransferMode.Binary && actualTransferMode === TransferMode.Text) {\n this.protocol = new Base64EncodedHubProtocol(this.protocol);\n }\n\n this.configureTimeout();\n }\n\n stop(): Promise {\n this.cleanupTimeout();\n return this.connection.stop();\n }\n\n stream(methodName: string, ...args: any[]): Observable {\n let invocationDescriptor = this.createStreamInvocation(methodName, args);\n\n let subject = new Subject(() => {\n let cancelInvocation: CancelInvocation = this.createCancelInvocation(invocationDescriptor.invocationId);\n let message: any = this.protocol.writeMessage(cancelInvocation);\n\n this.callbacks.delete(invocationDescriptor.invocationId);\n\n return this.connection.send(message);\n });\n\n this.callbacks.set(invocationDescriptor.invocationId, (invocationEvent: HubMessage, error?: Error) => {\n if (error) {\n subject.error(error);\n return;\n }\n\n if (invocationEvent.type === MessageType.Completion) {\n let completionMessage = invocationEvent;\n if (completionMessage.error) {\n subject.error(new Error(completionMessage.error));\n }\n else {\n subject.complete();\n }\n }\n else {\n subject.next((invocationEvent).item);\n }\n });\n\n let message = this.protocol.writeMessage(invocationDescriptor);\n\n this.connection.send(message)\n .catch(e => {\n subject.error(e);\n this.callbacks.delete(invocationDescriptor.invocationId);\n });\n\n return subject;\n }\n\n send(methodName: string, ...args: any[]): Promise {\n let invocationDescriptor = this.createInvocation(methodName, args, true);\n\n let message = this.protocol.writeMessage(invocationDescriptor);\n\n return this.connection.send(message);\n }\n\n invoke(methodName: string, ...args: any[]): Promise {\n let invocationDescriptor = this.createInvocation(methodName, args, false);\n\n let p = new Promise((resolve, reject) => {\n this.callbacks.set(invocationDescriptor.invocationId, (invocationEvent: HubMessage, error?: Error) => {\n if (error) {\n reject(error);\n return;\n }\n if (invocationEvent.type === MessageType.Completion) {\n let completionMessage = invocationEvent;\n if (completionMessage.error) {\n reject(new Error(completionMessage.error));\n }\n else {\n resolve(completionMessage.result);\n }\n }\n else {\n reject(new Error(`Unexpected message type: ${invocationEvent.type}`));\n }\n });\n\n let message = this.protocol.writeMessage(invocationDescriptor);\n\n this.connection.send(message)\n .catch(e => {\n reject(e);\n this.callbacks.delete(invocationDescriptor.invocationId);\n });\n });\n\n return p;\n }\n\n on(methodName: string, method: (...args: any[]) => void) {\n if (!methodName || !method) {\n return;\n }\n\n methodName = methodName.toLowerCase();\n if (!this.methods.has(methodName)) {\n this.methods.set(methodName, []);\n }\n\n this.methods.get(methodName).push(method);\n }\n\n off(methodName: string, method: (...args: any[]) => void) {\n if (!methodName || !method) {\n return;\n }\n\n methodName = methodName.toLowerCase();\n let handlers = this.methods.get(methodName);\n if (!handlers) {\n return;\n }\n var removeIdx = handlers.indexOf(method);\n if (removeIdx != -1) {\n handlers.splice(removeIdx, 1);\n }\n }\n\n onclose(callback: ConnectionClosed) {\n if (callback) {\n this.closedCallbacks.push(callback);\n }\n }\n\n private cleanupTimeout(): void {\n if (this.timeoutHandle) {\n clearTimeout(this.timeoutHandle);\n }\n }\n\n private createInvocation(methodName: string, args: any[], nonblocking: boolean): InvocationMessage {\n if (nonblocking) {\n return {\n type: MessageType.Invocation,\n target: methodName,\n arguments: args,\n };\n }\n else {\n let id = this.id;\n this.id++;\n\n return {\n type: MessageType.Invocation,\n invocationId: id.toString(),\n target: methodName,\n arguments: args,\n };\n }\n }\n\n private createStreamInvocation(methodName: string, args: any[]): StreamInvocationMessage {\n let id = this.id;\n this.id++;\n\n return {\n type: MessageType.StreamInvocation,\n invocationId: id.toString(),\n target: methodName,\n arguments: args,\n };\n }\n\n private createCancelInvocation(id: string): CancelInvocation {\n return {\n type: MessageType.CancelInvocation,\n invocationId: id,\n };\n }\n}\n","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\n// Everything that users need to access must be exported here. Including interfaces.\nexport * from \"./Common\"\nexport * from \"./Errors\"\nexport * from \"./HttpClient\"\nexport * from \"./HttpConnection\"\nexport * from \"./HubConnection\"\nexport * from \"./IConnection\"\nexport * from \"./IHubProtocol\"\nexport * from \"./ILogger\"\nexport * from \"./Loggers\"\nexport * from \"./Transports\"\nexport * from \"./Observable\"","// Copyright (c) .NET Foundation. All rights reserved.\n// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.\n\n// This is where we add any polyfills we'll need for the browser. It is the entry module for browser-specific builds.\n\nimport 'es6-promise/dist/es6-promise.auto.js';\n\nexport * from './index'\n"]}