firebase/firebase-storage.js.map

{"version":3,"file":"firebase-storage.js","sources":["../../node_modules/tslib/tslib.es6.js","../storage/src/implementation/constants.ts","../storage/src/implementation/error.ts","../storage/src/implementation/string.ts","../storage/src/implementation/taskenums.ts","../storage/src/implementation/xhrio.ts","../storage/src/implementation/type.ts","../storage/src/implementation/xhrio_network.ts","../storage/src/implementation/xhriopool.ts","../storage/src/implementation/fs.ts","../storage/src/implementation/blob.ts","../storage/src/implementation/location.ts","../storage/src/implementation/json.ts","../storage/src/implementation/path.ts","../storage/src/implementation/url.ts","../storage/src/implementation/metadata.ts","../storage/src/implementation/list.ts","../storage/src/implementation/requestinfo.ts","../storage/src/implementation/requests.ts","../storage/src/implementation/observer.ts","../storage/src/tasksnapshot.ts","../storage/src/implementation/args.ts","../storage/src/implementation/async.ts","../storage/src/task.ts","../storage/src/reference.ts","../storage/src/implementation/failrequest.ts","../storage/src/implementation/requestmap.ts","../storage/src/implementation/authwrapper.ts","../storage/src/implementation/request.ts","../storage/src/implementation/backoff.ts","../storage/src/service.ts","../storage/index.ts"],"sourcesContent":["/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n    extendStatics = Object.setPrototypeOf ||\r\n        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n    return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n    __assign = Object.assign || function __assign(t) {\r\n        for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n            s = arguments[i];\r\n            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n        }\r\n        return t;\r\n    }\r\n    return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n    var t = {};\r\n    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n        t[p] = s[p];\r\n    if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\r\n            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))\r\n                t[p[i]] = s[p[i]];\r\n        }\r\n    return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n    return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n    return new (P || (P = Promise))(function (resolve, reject) {\r\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n        function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\r\n        step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n    });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [op[0] & 2, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\nexport function __exportStar(m, exports) {\r\n    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\r\n}\r\n\r\nexport function __values(o) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n    if (m) return m.call(o);\r\n    return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n}\r\n\r\nexport function __read(o, n) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n    if (!m) return o;\r\n    var i = m.call(o), r, ar = [], e;\r\n    try {\r\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n    }\r\n    catch (error) { e = { error: error }; }\r\n    finally {\r\n        try {\r\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n        }\r\n        finally { if (e) throw e.error; }\r\n    }\r\n    return ar;\r\n}\r\n\r\nexport function __spread() {\r\n    for (var ar = [], i = 0; i < arguments.length; i++)\r\n        ar = ar.concat(__read(arguments[i]));\r\n    return ar;\r\n}\r\n\r\nexport function __spreadArrays() {\r\n    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\r\n    for (var r = Array(s), k = 0, i = 0; i < il; i++)\r\n        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)\r\n            r[k] = a[j];\r\n    return r;\r\n};\r\n\r\nexport function __await(v) {\r\n    return this instanceof __await ? (this.v = v, this) : new __await(v);\r\n}\r\n\r\nexport function __asyncGenerator(thisArg, _arguments, generator) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var g = generator.apply(thisArg, _arguments || []), i, q = [];\r\n    return i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i;\r\n    function verb(n) { if (g[n]) i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; }\r\n    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }\r\n    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n    function fulfill(value) { resume(\"next\", value); }\r\n    function reject(value) { resume(\"throw\", value); }\r\n    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n    var i, p;\r\n    return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n    if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n    var m = o[Symbol.asyncIterator], i;\r\n    return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n    if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n    return cooked;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n    if (mod && mod.__esModule) return mod;\r\n    var result = {};\r\n    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\r\n    result.default = mod;\r\n    return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n    return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/**\n * @fileoverview Constants used in the Firebase Storage library.\n */\n\n/**\n * Domain name for firebase storage.\n */\nexport const DEFAULT_HOST = 'firebasestorage.googleapis.com';\n\n/**\n * The key in Firebase config json for the storage bucket.\n */\nexport const CONFIG_STORAGE_BUCKET_KEY = 'storageBucket';\n\n/**\n * 2 minutes\n *\n * The timeout for all operations except upload.\n */\nexport const DEFAULT_MAX_OPERATION_RETRY_TIME = 2 * 60 * 1000;\n\n/**\n * 10 minutes\n *\n * The timeout for upload.\n */\nexport const DEFAULT_MAX_UPLOAD_RETRY_TIME = 10 * 60 * 1000;\n\n/**\n * This is the value of Number.MIN_SAFE_INTEGER, which is not well supported\n * enough for us to use it directly.\n */\nexport const MIN_SAFE_INTEGER = -9007199254740991;\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { CONFIG_STORAGE_BUCKET_KEY } from './constants';\n\nexport class FirebaseStorageError implements Error {\n  private code_: string;\n  private message_: string;\n  private serverResponse_: string | null;\n  private name_: string;\n\n  constructor(code: Code, message: string) {\n    this.code_ = prependCode(code);\n    this.message_ = 'Firebase Storage: ' + message;\n    this.serverResponse_ = null;\n    this.name_ = 'FirebaseError';\n  }\n\n  codeProp(): string {\n    return this.code;\n  }\n\n  codeEquals(code: Code): boolean {\n    return prependCode(code) === this.codeProp();\n  }\n\n  serverResponseProp(): string | null {\n    return this.serverResponse_;\n  }\n\n  setServerResponseProp(serverResponse: string | null): void {\n    this.serverResponse_ = serverResponse;\n  }\n\n  get name(): string {\n    return this.name_;\n  }\n\n  get code(): string {\n    return this.code_;\n  }\n\n  get message(): string {\n    return this.message_;\n  }\n\n  get serverResponse(): null | string {\n    return this.serverResponse_;\n  }\n}\n\nexport const errors = {};\n\n/**\n * @enum {string}\n */\nexport type Code = string;\nexport const Code = {\n  // Shared between all platforms\n  UNKNOWN: 'unknown',\n  OBJECT_NOT_FOUND: 'object-not-found',\n  BUCKET_NOT_FOUND: 'bucket-not-found',\n  PROJECT_NOT_FOUND: 'project-not-found',\n  QUOTA_EXCEEDED: 'quota-exceeded',\n  UNAUTHENTICATED: 'unauthenticated',\n  UNAUTHORIZED: 'unauthorized',\n  RETRY_LIMIT_EXCEEDED: 'retry-limit-exceeded',\n  INVALID_CHECKSUM: 'invalid-checksum',\n  CANCELED: 'canceled',\n  // JS specific\n  INVALID_EVENT_NAME: 'invalid-event-name',\n  INVALID_URL: 'invalid-url',\n  INVALID_DEFAULT_BUCKET: 'invalid-default-bucket',\n  NO_DEFAULT_BUCKET: 'no-default-bucket',\n  CANNOT_SLICE_BLOB: 'cannot-slice-blob',\n  SERVER_FILE_WRONG_SIZE: 'server-file-wrong-size',\n  NO_DOWNLOAD_URL: 'no-download-url',\n  INVALID_ARGUMENT: 'invalid-argument',\n  INVALID_ARGUMENT_COUNT: 'invalid-argument-count',\n  APP_DELETED: 'app-deleted',\n  INVALID_ROOT_OPERATION: 'invalid-root-operation',\n  INVALID_FORMAT: 'invalid-format',\n  INTERNAL_ERROR: 'internal-error'\n};\n\nexport function prependCode(code: Code): string {\n  return 'storage/' + code;\n}\n\nexport function unknown(): FirebaseStorageError {\n  const message =\n    'An unknown error occurred, please check the error payload for ' +\n    'server response.';\n  return new FirebaseStorageError(Code.UNKNOWN, message);\n}\n\nexport function objectNotFound(path: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.OBJECT_NOT_FOUND,\n    \"Object '\" + path + \"' does not exist.\"\n  );\n}\n\nexport function bucketNotFound(bucket: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.BUCKET_NOT_FOUND,\n    \"Bucket '\" + bucket + \"' does not exist.\"\n  );\n}\n\nexport function projectNotFound(project: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.PROJECT_NOT_FOUND,\n    \"Project '\" + project + \"' does not exist.\"\n  );\n}\n\nexport function quotaExceeded(bucket: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.QUOTA_EXCEEDED,\n    \"Quota for bucket '\" +\n      bucket +\n      \"' exceeded, please view quota on \" +\n      'https://firebase.google.com/pricing/.'\n  );\n}\n\nexport function unauthenticated(): FirebaseStorageError {\n  const message =\n    'User is not authenticated, please authenticate using Firebase ' +\n    'Authentication and try again.';\n  return new FirebaseStorageError(Code.UNAUTHENTICATED, message);\n}\n\nexport function unauthorized(path: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.UNAUTHORIZED,\n    \"User does not have permission to access '\" + path + \"'.\"\n  );\n}\n\nexport function retryLimitExceeded(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.RETRY_LIMIT_EXCEEDED,\n    'Max retry time for operation exceeded, please try again.'\n  );\n}\n\nexport function invalidChecksum(\n  path: string,\n  checksum: string,\n  calculated: string\n): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_CHECKSUM,\n    \"Uploaded/downloaded object '\" +\n      path +\n      \"' has checksum '\" +\n      checksum +\n      \"' which does not match '\" +\n      calculated +\n      \"'. Please retry the upload/download.\"\n  );\n}\n\nexport function canceled(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.CANCELED,\n    'User canceled the upload/download.'\n  );\n}\n\nexport function invalidEventName(name: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_EVENT_NAME,\n    \"Invalid event name '\" + name + \"'.\"\n  );\n}\n\nexport function invalidUrl(url: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_URL,\n    \"Invalid URL '\" + url + \"'.\"\n  );\n}\n\nexport function invalidDefaultBucket(bucket: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_DEFAULT_BUCKET,\n    \"Invalid default bucket '\" + bucket + \"'.\"\n  );\n}\n\nexport function noDefaultBucket(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.NO_DEFAULT_BUCKET,\n    'No default bucket ' +\n      \"found. Did you set the '\" +\n      CONFIG_STORAGE_BUCKET_KEY +\n      \"' property when initializing the app?\"\n  );\n}\n\nexport function cannotSliceBlob(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.CANNOT_SLICE_BLOB,\n    'Cannot slice blob for upload. Please retry the upload.'\n  );\n}\n\nexport function serverFileWrongSize(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.SERVER_FILE_WRONG_SIZE,\n    'Server recorded incorrect upload file size, please retry the upload.'\n  );\n}\n\nexport function noDownloadURL(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.NO_DOWNLOAD_URL,\n    'The given file does not have any download URLs.'\n  );\n}\n\nexport function invalidArgument(\n  index: number,\n  fnName: string,\n  message: string\n): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_ARGUMENT,\n    'Invalid argument in `' + fnName + '` at index ' + index + ': ' + message\n  );\n}\n\nexport function invalidArgumentCount(\n  argMin: number,\n  argMax: number,\n  fnName: string,\n  real: number\n): FirebaseStorageError {\n  let countPart;\n  let plural;\n  if (argMin === argMax) {\n    countPart = argMin;\n    plural = argMin === 1 ? 'argument' : 'arguments';\n  } else {\n    countPart = 'between ' + argMin + ' and ' + argMax;\n    plural = 'arguments';\n  }\n  return new FirebaseStorageError(\n    Code.INVALID_ARGUMENT_COUNT,\n    'Invalid argument count in `' +\n      fnName +\n      '`: Expected ' +\n      countPart +\n      ' ' +\n      plural +\n      ', received ' +\n      real +\n      '.'\n  );\n}\n\nexport function appDeleted(): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.APP_DELETED,\n    'The Firebase app was deleted.'\n  );\n}\n\n/**\n * @param name The name of the operation that was invalid.\n */\nexport function invalidRootOperation(name: string): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_ROOT_OPERATION,\n    \"The operation '\" +\n      name +\n      \"' cannot be performed on a root reference, create a non-root \" +\n      \"reference using child, such as .child('file.png').\"\n  );\n}\n\n/**\n * @param format The format that was not valid.\n * @param message A message describing the format violation.\n */\nexport function invalidFormat(\n  format: string,\n  message: string\n): FirebaseStorageError {\n  return new FirebaseStorageError(\n    Code.INVALID_FORMAT,\n    \"String does not match format '\" + format + \"': \" + message\n  );\n}\n\n/**\n * @param message A message describing the internal error.\n */\nexport function internalError(message: string): FirebaseStorageError {\n  throw new FirebaseStorageError(\n    Code.INTERNAL_ERROR,\n    'Internal error: ' + message\n  );\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport * as errorsExports from './error';\n\n/**\n * @enum {string}\n */\nexport type StringFormat = string;\nexport const StringFormat = {\n  RAW: 'raw',\n  BASE64: 'base64',\n  BASE64URL: 'base64url',\n  DATA_URL: 'data_url'\n};\n\nexport function formatValidator(stringFormat: unknown): void {\n  switch (stringFormat) {\n    case StringFormat.RAW:\n    case StringFormat.BASE64:\n    case StringFormat.BASE64URL:\n    case StringFormat.DATA_URL:\n      return;\n    default:\n      throw 'Expected one of the event types: [' +\n        StringFormat.RAW +\n        ', ' +\n        StringFormat.BASE64 +\n        ', ' +\n        StringFormat.BASE64URL +\n        ', ' +\n        StringFormat.DATA_URL +\n        '].';\n  }\n}\n\n/**\n * @struct\n */\nexport class StringData {\n  contentType: string | null;\n\n  constructor(public data: Uint8Array, contentType?: string | null) {\n    this.contentType = contentType || null;\n  }\n}\n\nexport function dataFromString(\n  format: StringFormat,\n  stringData: string\n): StringData {\n  switch (format) {\n    case StringFormat.RAW:\n      return new StringData(utf8Bytes_(stringData));\n    case StringFormat.BASE64:\n    case StringFormat.BASE64URL:\n      return new StringData(base64Bytes_(format, stringData));\n    case StringFormat.DATA_URL:\n      return new StringData(\n        dataURLBytes_(stringData),\n        dataURLContentType_(stringData)\n      );\n    default:\n    // do nothing\n  }\n\n  // assert(false);\n  throw errorsExports.unknown();\n}\n\nexport function utf8Bytes_(value: string): Uint8Array {\n  const b: number[] = [];\n  for (let i = 0; i < value.length; i++) {\n    let c = value.charCodeAt(i);\n    if (c <= 127) {\n      b.push(c);\n    } else {\n      if (c <= 2047) {\n        b.push(192 | (c >> 6), 128 | (c & 63));\n      } else {\n        if ((c & 64512) === 55296) {\n          // The start of a surrogate pair.\n          const valid =\n            i < value.length - 1 && (value.charCodeAt(i + 1) & 64512) === 56320;\n          if (!valid) {\n            // The second surrogate wasn't there.\n            b.push(239, 191, 189);\n          } else {\n            const hi = c;\n            const lo = value.charCodeAt(++i);\n            c = 65536 | ((hi & 1023) << 10) | (lo & 1023);\n            b.push(\n              240 | (c >> 18),\n              128 | ((c >> 12) & 63),\n              128 | ((c >> 6) & 63),\n              128 | (c & 63)\n            );\n          }\n        } else {\n          if ((c & 64512) === 56320) {\n            // Invalid low surrogate.\n            b.push(239, 191, 189);\n          } else {\n            b.push(224 | (c >> 12), 128 | ((c >> 6) & 63), 128 | (c & 63));\n          }\n        }\n      }\n    }\n  }\n  return new Uint8Array(b);\n}\n\nexport function percentEncodedBytes_(value: string): Uint8Array {\n  let decoded;\n  try {\n    decoded = decodeURIComponent(value);\n  } catch (e) {\n    throw errorsExports.invalidFormat(\n      StringFormat.DATA_URL,\n      'Malformed data URL.'\n    );\n  }\n  return utf8Bytes_(decoded);\n}\n\nexport function base64Bytes_(format: StringFormat, value: string): Uint8Array {\n  switch (format) {\n    case StringFormat.BASE64: {\n      const hasMinus = value.indexOf('-') !== -1;\n      const hasUnder = value.indexOf('_') !== -1;\n      if (hasMinus || hasUnder) {\n        const invalidChar = hasMinus ? '-' : '_';\n        throw errorsExports.invalidFormat(\n          format,\n          \"Invalid character '\" +\n            invalidChar +\n            \"' found: is it base64url encoded?\"\n        );\n      }\n      break;\n    }\n    case StringFormat.BASE64URL: {\n      const hasPlus = value.indexOf('+') !== -1;\n      const hasSlash = value.indexOf('/') !== -1;\n      if (hasPlus || hasSlash) {\n        const invalidChar = hasPlus ? '+' : '/';\n        throw errorsExports.invalidFormat(\n          format,\n          \"Invalid character '\" + invalidChar + \"' found: is it base64 encoded?\"\n        );\n      }\n      value = value.replace(/-/g, '+').replace(/_/g, '/');\n      break;\n    }\n    default:\n    // do nothing\n  }\n  let bytes;\n  try {\n    bytes = atob(value);\n  } catch (e) {\n    throw errorsExports.invalidFormat(format, 'Invalid character found');\n  }\n  const array = new Uint8Array(bytes.length);\n  for (let i = 0; i < bytes.length; i++) {\n    array[i] = bytes.charCodeAt(i);\n  }\n  return array;\n}\n\n/**\n * @struct\n */\nclass DataURLParts {\n  base64: boolean = false;\n  contentType: string | null = null;\n  rest: string;\n\n  constructor(dataURL: string) {\n    const matches = dataURL.match(/^data:([^,]+)?,/);\n    if (matches === null) {\n      throw errorsExports.invalidFormat(\n        StringFormat.DATA_URL,\n        \"Must be formatted 'data:[<mediatype>][;base64],<data>\"\n      );\n    }\n    const middle = matches[1] || null;\n    if (middle != null) {\n      this.base64 = endsWith(middle, ';base64');\n      this.contentType = this.base64\n        ? middle.substring(0, middle.length - ';base64'.length)\n        : middle;\n    }\n    this.rest = dataURL.substring(dataURL.indexOf(',') + 1);\n  }\n}\n\nexport function dataURLBytes_(dataUrl: string): Uint8Array {\n  const parts = new DataURLParts(dataUrl);\n  if (parts.base64) {\n    return base64Bytes_(StringFormat.BASE64, parts.rest);\n  } else {\n    return percentEncodedBytes_(parts.rest);\n  }\n}\n\nexport function dataURLContentType_(dataUrl: string): string | null {\n  const parts = new DataURLParts(dataUrl);\n  return parts.contentType;\n}\n\nfunction endsWith(s: string, end: string): boolean {\n  const longEnough = s.length >= end.length;\n  if (!longEnough) {\n    return false;\n  }\n\n  return s.substring(s.length - end.length) === end;\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Enumerations used for upload tasks.\n */\n\n/**\n * Enum for task events.\n * @enum {string}\n */\nexport type TaskEvent = string;\nexport const TaskEvent = {\n  /** Triggered whenever the task changes or progress is updated. */\n  STATE_CHANGED: 'state_changed'\n};\n\n/**\n * Internal enum for task state.\n * @enum {string}\n */\nexport type InternalTaskState = string;\nexport const InternalTaskState = {\n  RUNNING: 'running',\n  PAUSING: 'pausing',\n  PAUSED: 'paused',\n  SUCCESS: 'success',\n  CANCELING: 'canceling',\n  CANCELED: 'canceled',\n  ERROR: 'error'\n};\n\n/**\n * External (API-surfaced) enum for task state.\n * @enum {string}\n */\nexport type TaskState = string;\nexport const TaskState = {\n  /** The task is currently transferring data. */\n  RUNNING: 'running',\n  /** The task was paused by the user. */\n  PAUSED: 'paused',\n  /** The task completed successfully. */\n  SUCCESS: 'success',\n  /** The task was canceled. */\n  CANCELED: 'canceled',\n  /** The task failed with an error. */\n  ERROR: 'error'\n};\n\nexport function taskStateFromInternalTaskState(\n  state: InternalTaskState\n): TaskState {\n  switch (state) {\n    case InternalTaskState.RUNNING:\n    case InternalTaskState.PAUSING:\n    case InternalTaskState.CANCELING:\n      return TaskState.RUNNING;\n    case InternalTaskState.PAUSED:\n      return TaskState.PAUSED;\n    case InternalTaskState.SUCCESS:\n      return TaskState.SUCCESS;\n    case InternalTaskState.CANCELED:\n      return TaskState.CANCELED;\n    case InternalTaskState.ERROR:\n      return TaskState.ERROR;\n    default:\n      // TODO(andysoto): assert(false);\n      return TaskState.ERROR;\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview A lightweight wrapper around XMLHttpRequest with a\n * goog.net.XhrIo-like interface.\n */\n\nexport interface Headers {\n  [name: string]: string | number;\n}\n\nexport interface XhrIo {\n  send(\n    url: string,\n    method: string,\n    body?: ArrayBufferView | Blob | string | null,\n    headers?: Headers\n  ): Promise<XhrIo>;\n\n  getErrorCode(): ErrorCode;\n\n  getStatus(): number;\n\n  getResponseText(): string;\n\n  /**\n   * Abort the request.\n   */\n  abort(): void;\n\n  getResponseHeader(header: string): string | null;\n\n  addUploadProgressListener(listener: (p1: ProgressEvent) => void): void;\n\n  removeUploadProgressListener(listener: (p1: ProgressEvent) => void): void;\n}\n\n/**\n * @enum{number}\n */\nexport enum ErrorCode {\n  NO_ERROR = 0,\n  NETWORK_ERROR = 1,\n  ABORT = 2\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @return False if the object is undefined or null, true otherwise.\n */\nexport function isDef<T>(p: T | null | undefined): p is T {\n  return p != null;\n}\n\nexport function isJustDef<T>(p: T | null | undefined): p is T | null {\n  return p !== void 0;\n}\n\nexport function isFunction(p: unknown): p is Function {\n  return typeof p === 'function';\n}\n\nexport function isObject(p: unknown): p is { [key: string]: unknown } | null {\n  return typeof p === 'object';\n}\n\nexport function isNonNullObject(p: unknown): p is object {\n  return isObject(p) && p !== null;\n}\n\nexport function isNonArrayObject(p: unknown): boolean {\n  return isObject(p) && !Array.isArray(p);\n}\n\nexport function isString(p: unknown): p is string {\n  return typeof p === 'string' || p instanceof String;\n}\n\nexport function isInteger(p: unknown): p is number {\n  return isNumber(p) && Number.isInteger(p);\n}\n\nexport function isNumber(p: unknown): p is number {\n  return typeof p === 'number' || p instanceof Number;\n}\n\nexport function isNativeBlob(p: unknown): p is Blob {\n  return isNativeBlobDefined() && p instanceof Blob;\n}\n\nexport function isNativeBlobDefined(): boolean {\n  return typeof Blob !== 'undefined';\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport * as errorsExports from './error';\nimport * as type from './type';\nimport { Headers, XhrIo, ErrorCode } from './xhrio';\n\n/**\n * We use this instead of goog.net.XhrIo because goog.net.XhrIo is hyuuuuge and\n * doesn't work in React Native on Android.\n */\nexport class NetworkXhrIo implements XhrIo {\n  private xhr_: XMLHttpRequest;\n  private errorCode_: ErrorCode;\n  private sendPromise_: Promise<XhrIo>;\n  private sent_: boolean = false;\n\n  constructor() {\n    this.xhr_ = new XMLHttpRequest();\n    this.errorCode_ = ErrorCode.NO_ERROR;\n    this.sendPromise_ = new Promise(resolve => {\n      this.xhr_.addEventListener('abort', () => {\n        this.errorCode_ = ErrorCode.ABORT;\n        resolve(this);\n      });\n      this.xhr_.addEventListener('error', () => {\n        this.errorCode_ = ErrorCode.NETWORK_ERROR;\n        resolve(this);\n      });\n      this.xhr_.addEventListener('load', () => {\n        resolve(this);\n      });\n    });\n  }\n\n  /**\n   * @override\n   */\n  send(\n    url: string,\n    method: string,\n    body?: ArrayBufferView | Blob | string | null,\n    headers?: Headers\n  ): Promise<XhrIo> {\n    if (this.sent_) {\n      throw errorsExports.internalError('cannot .send() more than once');\n    }\n    this.sent_ = true;\n    this.xhr_.open(method, url, true);\n    if (type.isDef(headers)) {\n      for (const key in headers) {\n        if (headers.hasOwnProperty(key)) {\n          this.xhr_.setRequestHeader(key, headers[key].toString());\n        }\n      }\n    }\n    if (type.isDef(body)) {\n      this.xhr_.send(body);\n    } else {\n      this.xhr_.send();\n    }\n    return this.sendPromise_;\n  }\n\n  /**\n   * @override\n   */\n  getErrorCode(): ErrorCode {\n    if (!this.sent_) {\n      throw errorsExports.internalError(\n        'cannot .getErrorCode() before sending'\n      );\n    }\n    return this.errorCode_;\n  }\n\n  /**\n   * @override\n   */\n  getStatus(): number {\n    if (!this.sent_) {\n      throw errorsExports.internalError('cannot .getStatus() before sending');\n    }\n    try {\n      return this.xhr_.status;\n    } catch (e) {\n      return -1;\n    }\n  }\n\n  /**\n   * @override\n   */\n  getResponseText(): string {\n    if (!this.sent_) {\n      throw errorsExports.internalError(\n        'cannot .getResponseText() before sending'\n      );\n    }\n    return this.xhr_.responseText;\n  }\n\n  /**\n   * Aborts the request.\n   * @override\n   */\n  abort(): void {\n    this.xhr_.abort();\n  }\n\n  /**\n   * @override\n   */\n  getResponseHeader(header: string): string | null {\n    return this.xhr_.getResponseHeader(header);\n  }\n\n  /**\n   * @override\n   */\n  addUploadProgressListener(listener: (p1: ProgressEvent) => void): void {\n    if (type.isDef(this.xhr_.upload)) {\n      this.xhr_.upload.addEventListener('progress', listener);\n    }\n  }\n\n  /**\n   * @override\n   */\n  removeUploadProgressListener(listener: (p1: ProgressEvent) => void): void {\n    if (type.isDef(this.xhr_.upload)) {\n      this.xhr_.upload.removeEventListener('progress', listener);\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Replacement for goog.net.XhrIoPool that works with fbs.XhrIo.\n */\nimport { XhrIo } from './xhrio';\nimport { NetworkXhrIo } from './xhrio_network';\n\n/**\n * Factory-like class for creating XhrIo instances.\n */\nexport class XhrIoPool {\n  createXhrIo(): XhrIo {\n    return new NetworkXhrIo();\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/**\n * @fileoverview Some methods copied from goog.fs.\n * We don't include goog.fs because it pulls in a bunch of Deferred code that\n * bloats the size of the released binary.\n */\nimport * as type from './type';\n\nfunction getBlobBuilder(): (typeof IBlobBuilder) | undefined {\n  if (typeof BlobBuilder !== 'undefined') {\n    return BlobBuilder;\n  } else if (typeof WebKitBlobBuilder !== 'undefined') {\n    return WebKitBlobBuilder;\n  } else {\n    return undefined;\n  }\n}\n\n/**\n * Concatenates one or more values together and converts them to a Blob.\n *\n * @param args The values that will make up the resulting blob.\n * @return The blob.\n */\nexport function getBlob(...args: Array<string | Blob | ArrayBuffer>): Blob {\n  const BlobBuilder = getBlobBuilder();\n  if (BlobBuilder !== undefined) {\n    const bb = new BlobBuilder();\n    for (let i = 0; i < args.length; i++) {\n      bb.append(args[i]);\n    }\n    return bb.getBlob();\n  } else {\n    if (type.isNativeBlobDefined()) {\n      return new Blob(args);\n    } else {\n      throw Error(\"This browser doesn't seem to support creating Blobs\");\n    }\n  }\n}\n\n/**\n * Slices the blob. The returned blob contains data from the start byte\n * (inclusive) till the end byte (exclusive). Negative indices cannot be used.\n *\n * @param blob The blob to be sliced.\n * @param start Index of the starting byte.\n * @param end Index of the ending byte.\n * @return The blob slice or null if not supported.\n */\nexport function sliceBlob(blob: Blob, start: number, end: number): Blob | null {\n  if (blob.webkitSlice) {\n    return blob.webkitSlice(start, end);\n  } else if (blob.mozSlice) {\n    return blob.mozSlice(start, end);\n  } else if (blob.slice) {\n    return blob.slice(start, end);\n  }\n  return null;\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @file Provides a Blob-like wrapper for various binary types (including the\n * native Blob type). This makes it possible to upload types like ArrayBuffers,\n * making uploads possible in environments without the native Blob type.\n */\nimport * as fs from './fs';\nimport { StringFormat, dataFromString } from './string';\nimport * as type from './type';\n\n/**\n * @param opt_elideCopy If true, doesn't copy mutable input data\n *     (e.g. Uint8Arrays). Pass true only if you know the objects will not be\n *     modified after this blob's construction.\n */\nexport class FbsBlob {\n  private data_!: Blob | Uint8Array;\n  private size_: number;\n  private type_: string;\n\n  constructor(data: Blob | Uint8Array | ArrayBuffer, elideCopy?: boolean) {\n    let size: number = 0;\n    let blobType: string = '';\n    if (type.isNativeBlob(data)) {\n      this.data_ = data as Blob;\n      size = (data as Blob).size;\n      blobType = (data as Blob).type;\n    } else if (data instanceof ArrayBuffer) {\n      if (elideCopy) {\n        this.data_ = new Uint8Array(data);\n      } else {\n        this.data_ = new Uint8Array(data.byteLength);\n        this.data_.set(new Uint8Array(data));\n      }\n      size = this.data_.length;\n    } else if (data instanceof Uint8Array) {\n      if (elideCopy) {\n        this.data_ = data as Uint8Array;\n      } else {\n        this.data_ = new Uint8Array(data.length);\n        this.data_.set(data as Uint8Array);\n      }\n      size = data.length;\n    }\n    this.size_ = size;\n    this.type_ = blobType;\n  }\n\n  size(): number {\n    return this.size_;\n  }\n\n  type(): string {\n    return this.type_;\n  }\n\n  slice(startByte: number, endByte: number): FbsBlob | null {\n    if (type.isNativeBlob(this.data_)) {\n      const realBlob = this.data_ as Blob;\n      const sliced = fs.sliceBlob(realBlob, startByte, endByte);\n      if (sliced === null) {\n        return null;\n      }\n      return new FbsBlob(sliced);\n    } else {\n      const slice = new Uint8Array(\n        (this.data_ as Uint8Array).buffer,\n        startByte,\n        endByte - startByte\n      );\n      return new FbsBlob(slice, true);\n    }\n  }\n\n  static getBlob(...args: Array<string | FbsBlob>): FbsBlob | null {\n    if (type.isNativeBlobDefined()) {\n      const blobby: Array<Blob | Uint8Array | string> = args.map(\n        (val: string | FbsBlob): Blob | Uint8Array | string => {\n          if (val instanceof FbsBlob) {\n            return val.data_;\n          } else {\n            return val;\n          }\n        }\n      );\n      return new FbsBlob(fs.getBlob.apply(null, blobby));\n    } else {\n      const uint8Arrays: Uint8Array[] = args.map(\n        (val: string | FbsBlob): Uint8Array => {\n          if (type.isString(val)) {\n            return dataFromString(StringFormat.RAW, val as string).data;\n          } else {\n            // Blobs don't exist, so this has to be a Uint8Array.\n            return (val as FbsBlob).data_ as Uint8Array;\n          }\n        }\n      );\n      let finalLength = 0;\n      uint8Arrays.forEach((array: Uint8Array): void => {\n        finalLength += array.byteLength;\n      });\n      const merged = new Uint8Array(finalLength);\n      let index = 0;\n      uint8Arrays.forEach((array: Uint8Array) => {\n        for (let i = 0; i < array.length; i++) {\n          merged[index++] = array[i];\n        }\n      });\n      return new FbsBlob(merged, true);\n    }\n  }\n\n  uploadData(): Blob | Uint8Array {\n    return this.data_;\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Functionality related to the parsing/composition of bucket/\n * object location.\n */\nimport * as errorsExports from './error';\nimport { DEFAULT_HOST } from './constants';\n\n/**\n * @struct\n */\nexport class Location {\n  private path_: string;\n\n  constructor(public readonly bucket: string, path: string) {\n    this.path_ = path;\n  }\n\n  get path(): string {\n    return this.path_;\n  }\n\n  get isRoot(): boolean {\n    return this.path.length === 0;\n  }\n\n  fullServerUrl(): string {\n    const encode = encodeURIComponent;\n    return '/b/' + encode(this.bucket) + '/o/' + encode(this.path);\n  }\n\n  bucketOnlyServerUrl(): string {\n    const encode = encodeURIComponent;\n    return '/b/' + encode(this.bucket) + '/o';\n  }\n\n  static makeFromBucketSpec(bucketString: string): Location {\n    let bucketLocation;\n    try {\n      bucketLocation = Location.makeFromUrl(bucketString);\n    } catch (e) {\n      // Not valid URL, use as-is. This lets you put bare bucket names in\n      // config.\n      return new Location(bucketString, '');\n    }\n    if (bucketLocation.path === '') {\n      return bucketLocation;\n    } else {\n      throw errorsExports.invalidDefaultBucket(bucketString);\n    }\n  }\n\n  static makeFromUrl(url: string): Location {\n    let location: Location | null = null;\n    const bucketDomain = '([A-Za-z0-9.\\\\-_]+)';\n\n    function gsModify(loc: Location): void {\n      if (loc.path.charAt(loc.path.length - 1) === '/') {\n        loc.path_ = loc.path_.slice(0, -1);\n      }\n    }\n    const gsPath = '(/(.*))?$';\n    const path = '(/([^?#]*).*)?$';\n    const gsRegex = new RegExp('^gs://' + bucketDomain + gsPath, 'i');\n    const gsIndices = { bucket: 1, path: 3 };\n\n    function httpModify(loc: Location): void {\n      loc.path_ = decodeURIComponent(loc.path);\n    }\n    const version = 'v[A-Za-z0-9_]+';\n    const hostRegex = DEFAULT_HOST.replace(/[.]/g, '\\\\.');\n    const httpRegex = new RegExp(\n      `^https?://${hostRegex}/${version}/b/${bucketDomain}/o${path}`,\n      'i'\n    );\n    const httpIndices = { bucket: 1, path: 3 };\n    const groups = [\n      { regex: gsRegex, indices: gsIndices, postModify: gsModify },\n      { regex: httpRegex, indices: httpIndices, postModify: httpModify }\n    ];\n    for (let i = 0; i < groups.length; i++) {\n      const group = groups[i];\n      const captures = group.regex.exec(url);\n      if (captures) {\n        const bucketValue = captures[group.indices.bucket];\n        let pathValue = captures[group.indices.path];\n        if (!pathValue) {\n          pathValue = '';\n        }\n        location = new Location(bucketValue, pathValue);\n        group.postModify(location);\n        break;\n      }\n    }\n    if (location == null) {\n      throw errorsExports.invalidUrl(url);\n    }\n    return location;\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport * as type from './type';\n\n/**\n * Returns the Object resulting from parsing the given JSON, or null if the\n * given string does not represent a JSON object.\n */\nexport function jsonObjectOrNull(\n  s: string\n): { [name: string]: unknown } | null {\n  let obj;\n  try {\n    obj = JSON.parse(s);\n  } catch (e) {\n    return null;\n  }\n  if (type.isNonArrayObject(obj)) {\n    return obj;\n  } else {\n    return null;\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Contains helper methods for manipulating paths.\n */\n\n/**\n * @return Null if the path is already at the root.\n */\nexport function parent(path: string): string | null {\n  if (path.length === 0) {\n    return null;\n  }\n  const index = path.lastIndexOf('/');\n  if (index === -1) {\n    return '';\n  }\n  const newPath = path.slice(0, index);\n  return newPath;\n}\n\nexport function child(path: string, childPath: string): string {\n  const canonicalChildPath = childPath\n    .split('/')\n    .filter(component => component.length > 0)\n    .join('/');\n  if (path.length === 0) {\n    return canonicalChildPath;\n  } else {\n    return path + '/' + canonicalChildPath;\n  }\n}\n\n/**\n * Returns the last component of a path.\n * '/foo/bar' -> 'bar'\n * '/foo/bar/baz/' -> 'baz/'\n * '/a' -> 'a'\n */\nexport function lastComponent(path: string): string {\n  const index = path.lastIndexOf('/', path.length - 2);\n  if (index === -1) {\n    return path;\n  } else {\n    return path.slice(index + 1);\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Functions to create and manipulate URLs for the server API.\n */\nimport { DEFAULT_HOST } from './constants';\nimport { UrlParams } from './requestinfo';\n\nexport function makeUrl(urlPart: string): string {\n  return `https://${DEFAULT_HOST}/v0${urlPart}`;\n}\n\nexport function makeQueryString(params: UrlParams): string {\n  const encode = encodeURIComponent;\n  let queryPart = '?';\n  for (const key in params) {\n    if (params.hasOwnProperty(key)) {\n      // @ts-ignore TODO: remove once typescript is upgraded to 3.5.x\n      const nextPart = encode(key) + '=' + encode(params[key]);\n      queryPart = queryPart + nextPart + '&';\n    }\n  }\n\n  // Chop off the extra '&' or '?' on the end\n  queryPart = queryPart.slice(0, -1);\n  return queryPart;\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Documentation for the metadata format\n */\nimport { Metadata } from '../metadata';\n\nimport { AuthWrapper } from './authwrapper';\nimport * as json from './json';\nimport { Location } from './location';\nimport * as path from './path';\nimport * as type from './type';\nimport * as UrlUtils from './url';\nimport { Reference } from '../reference';\n\nexport function noXform_<T>(metadata: Metadata, value: T): T {\n  return value;\n}\n\n/**\n * @struct\n */\nclass Mapping<T> {\n  local: string;\n  writable: boolean;\n  xform: (p1: Metadata, p2?: T) => T | undefined;\n\n  constructor(\n    public server: string,\n    local?: string | null,\n    writable?: boolean,\n    xform?: ((p1: Metadata, p2?: T) => T | undefined) | null\n  ) {\n    this.local = local || server;\n    this.writable = !!writable;\n    this.xform = xform || noXform_;\n  }\n}\ntype Mappings = Array<Mapping<string> | Mapping<number>>;\n\nexport { Mappings };\n\nlet mappings_: Mappings | null = null;\n\nexport function xformPath(fullPath: string | undefined): string | undefined {\n  if (!type.isString(fullPath) || fullPath.length < 2) {\n    return fullPath;\n  } else {\n    return path.lastComponent(fullPath);\n  }\n}\n\nexport function getMappings(): Mappings {\n  if (mappings_) {\n    return mappings_;\n  }\n  const mappings: Mappings = [];\n  mappings.push(new Mapping<string>('bucket'));\n  mappings.push(new Mapping<string>('generation'));\n  mappings.push(new Mapping<string>('metageneration'));\n  mappings.push(new Mapping<string>('name', 'fullPath', true));\n\n  function mappingsXformPath(\n    _metadata: Metadata,\n    fullPath: string | undefined\n  ): string | undefined {\n    return xformPath(fullPath);\n  }\n  const nameMapping = new Mapping<string>('name');\n  nameMapping.xform = mappingsXformPath;\n  mappings.push(nameMapping);\n\n  /**\n   * Coerces the second param to a number, if it is defined.\n   */\n  function xformSize(\n    _metadata: Metadata,\n    size: number | string | undefined\n  ): number | undefined {\n    if (type.isDef(size)) {\n      return Number(size);\n    } else {\n      return size;\n    }\n  }\n  const sizeMapping = new Mapping<number>('size');\n  sizeMapping.xform = xformSize;\n  mappings.push(sizeMapping);\n  mappings.push(new Mapping<number>('timeCreated'));\n  mappings.push(new Mapping<string>('updated'));\n  mappings.push(new Mapping<string>('md5Hash', null, true));\n  mappings.push(new Mapping<string>('cacheControl', null, true));\n  mappings.push(new Mapping<string>('contentDisposition', null, true));\n  mappings.push(new Mapping<string>('contentEncoding', null, true));\n  mappings.push(new Mapping<string>('contentLanguage', null, true));\n  mappings.push(new Mapping<string>('contentType', null, true));\n  mappings.push(new Mapping<string>('metadata', 'customMetadata', true));\n  mappings_ = mappings;\n  return mappings_;\n}\n\nexport function addRef(metadata: Metadata, authWrapper: AuthWrapper): void {\n  function generateRef(): Reference {\n    const bucket: string = metadata['bucket'] as string;\n    const path: string = metadata['fullPath'] as string;\n    const loc = new Location(bucket, path);\n    return authWrapper.makeStorageReference(loc);\n  }\n  Object.defineProperty(metadata, 'ref', { get: generateRef });\n}\n\nexport function fromResource(\n  authWrapper: AuthWrapper,\n  resource: { [name: string]: unknown },\n  mappings: Mappings\n): Metadata {\n  const metadata: Metadata = {} as Metadata;\n  metadata['type'] = 'file';\n  const len = mappings.length;\n  for (let i = 0; i < len; i++) {\n    const mapping = mappings[i];\n    metadata[mapping.local] = (mapping as Mapping<unknown>).xform(\n      metadata,\n      resource[mapping.server]\n    );\n  }\n  addRef(metadata, authWrapper);\n  return metadata;\n}\n\nexport function fromResourceString(\n  authWrapper: AuthWrapper,\n  resourceString: string,\n  mappings: Mappings\n): Metadata | null {\n  const obj = json.jsonObjectOrNull(resourceString);\n  if (obj === null) {\n    return null;\n  }\n  const resource = obj as Metadata;\n  return fromResource(authWrapper, resource, mappings);\n}\n\nexport function downloadUrlFromResourceString(\n  metadata: Metadata,\n  resourceString: string\n): string | null {\n  const obj = json.jsonObjectOrNull(resourceString);\n  if (obj === null) {\n    return null;\n  }\n  if (!type.isString(obj['downloadTokens'])) {\n    // This can happen if objects are uploaded through GCS and retrieved\n    // through list, so we don't want to throw an Error.\n    return null;\n  }\n  const tokens: string = obj['downloadTokens'] as string;\n  if (tokens.length === 0) {\n    return null;\n  }\n  const encode = encodeURIComponent;\n  const tokensList = tokens.split(',');\n  const urls = tokensList.map((token: string): string => {\n    const bucket: string = metadata['bucket'] as string;\n    const path: string = metadata['fullPath'] as string;\n    const urlPart = '/b/' + encode(bucket) + '/o/' + encode(path);\n    const base = UrlUtils.makeUrl(urlPart);\n    const queryString = UrlUtils.makeQueryString({\n      alt: 'media',\n      token\n    });\n    return base + queryString;\n  });\n  return urls[0];\n}\n\nexport function toResourceString(\n  metadata: Metadata,\n  mappings: Mappings\n): string {\n  const resource: {\n    [prop: string]: unknown;\n  } = {};\n  const len = mappings.length;\n  for (let i = 0; i < len; i++) {\n    const mapping = mappings[i];\n    if (mapping.writable) {\n      resource[mapping.server] = metadata[mapping.local];\n    }\n  }\n  return JSON.stringify(resource);\n}\n\nexport function metadataValidator(p: unknown): void {\n  if (!type.isObject(p) || !p) {\n    throw 'Expected Metadata object.';\n  }\n  for (const key in p) {\n    if (p.hasOwnProperty(key)) {\n      const val = p[key];\n      if (key === 'customMetadata') {\n        if (!type.isObject(val)) {\n          throw 'Expected object for \\'customMetadata\\' mapping.';\n        }\n      } else {\n        if (type.isNonNullObject(val)) {\n          throw \"Mapping for '\" + key + \"' cannot be an object.\";\n        }\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Documentation for the listOptions and listResult format\n */\nimport { AuthWrapper } from './authwrapper';\nimport { Location } from './location';\nimport * as json from './json';\nimport * as type from './type';\nimport { ListResult } from '../list';\nimport * as errors from './error';\n\n/**\n * Represents the simplified object metadata returned by List API.\n * Other fields are filtered because list in Firebase Rules does not grant\n * the permission to read the metadata.\n */\ninterface ListMetadataResponse {\n  name: string;\n  bucket: string;\n}\n\n/**\n * Represents the JSON response of List API.\n */\ninterface ListResultResponse {\n  prefixes: string[];\n  items: ListMetadataResponse[];\n  nextPageToken?: string;\n}\n\nconst MAX_RESULTS_KEY = 'maxResults';\nconst MAX_MAX_RESULTS = 1000;\nconst PAGE_TOKEN_KEY = 'pageToken';\nconst PREFIXES_KEY = 'prefixes';\nconst ITEMS_KEY = 'items';\n\nfunction fromBackendResponse(\n  authWrapper: AuthWrapper,\n  resource: ListResultResponse\n): ListResult {\n  const listResult: ListResult = {\n    prefixes: [],\n    items: [],\n    nextPageToken: resource['nextPageToken']\n  };\n  const bucket = authWrapper.bucket();\n  if (bucket === null) {\n    throw errors.noDefaultBucket();\n  }\n  if (resource[PREFIXES_KEY]) {\n    for (const path of resource[PREFIXES_KEY]) {\n      const pathWithoutTrailingSlash = path.replace(/\\/$/, '');\n      const reference = authWrapper.makeStorageReference(\n        new Location(bucket, pathWithoutTrailingSlash)\n      );\n      listResult.prefixes.push(reference);\n    }\n  }\n\n  if (resource[ITEMS_KEY]) {\n    for (const item of resource[ITEMS_KEY]) {\n      const reference = authWrapper.makeStorageReference(\n        new Location(bucket, item['name'])\n      );\n      listResult.items.push(reference);\n    }\n  }\n  return listResult;\n}\n\nexport function fromResponseString(\n  authWrapper: AuthWrapper,\n  resourceString: string\n): ListResult | null {\n  const obj = json.jsonObjectOrNull(resourceString);\n  if (obj === null) {\n    return null;\n  }\n  const resource = (obj as unknown) as ListResultResponse;\n  return fromBackendResponse(authWrapper, resource);\n}\n\nexport function listOptionsValidator(p: unknown): void {\n  if (!type.isObject(p) || !p) {\n    throw 'Expected ListOptions object.';\n  }\n  for (const key in p) {\n    if (key === MAX_RESULTS_KEY) {\n      if (\n        !type.isInteger(p[MAX_RESULTS_KEY]) ||\n        (p[MAX_RESULTS_KEY] as number) <= 0\n      ) {\n        throw 'Expected maxResults to be a positive number.';\n      }\n      if ((p[MAX_RESULTS_KEY] as number) > 1000) {\n        throw `Expected maxResults to be less than or equal to ${MAX_MAX_RESULTS}.`;\n      }\n    } else if (key === PAGE_TOKEN_KEY) {\n      if (p[PAGE_TOKEN_KEY] && !type.isString(p[PAGE_TOKEN_KEY])) {\n        throw 'Expected pageToken to be string.';\n      }\n    } else {\n      throw 'Unknown option: ' + key;\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { FirebaseStorageError } from './error';\nimport { Headers, XhrIo } from './xhrio';\n\nexport interface UrlParams {\n  [name: string]: string | number;\n}\n\nexport class RequestInfo<T> {\n  urlParams: UrlParams = {};\n  headers: Headers = {};\n  body: Blob | string | Uint8Array | null = null;\n\n  errorHandler:\n    | ((p1: XhrIo, p2: FirebaseStorageError) => FirebaseStorageError)\n    | null = null;\n\n  /**\n   * Called with the current number of bytes uploaded and total size (-1 if not\n   * computable) of the request body (i.e. used to report upload progress).\n   */\n  progressCallback: ((p1: number, p2: number) => void) | null = null;\n  successCodes: number[] = [200];\n  additionalRetryCodes: number[] = [];\n\n  constructor(\n    public url: string,\n    public method: string,\n    /**\n     * Returns the value with which to resolve the request's promise. Only called\n     * if the request is successful. Throw from this function to reject the\n     * returned Request's promise with the thrown error.\n     * Note: The XhrIo passed to this function may be reused after this callback\n     * returns. Do not keep a reference to it in any way.\n     */\n    public handler: (p1: XhrIo, p2: string) => T,\n    public timeout: number\n  ) {}\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Defines methods for interacting with the network.\n */\n\nimport { Metadata } from '../metadata';\nimport { ListResult } from '../list';\nimport { AuthWrapper } from './authwrapper';\nimport { FbsBlob } from './blob';\nimport {\n  FirebaseStorageError,\n  cannotSliceBlob,\n  unauthenticated,\n  quotaExceeded,\n  unauthorized,\n  objectNotFound,\n  serverFileWrongSize,\n  unknown\n} from './error';\nimport { Location } from './location';\nimport * as MetadataUtils from './metadata';\nimport * as ListResultUtils from './list';\nimport { RequestInfo, UrlParams } from './requestinfo';\nimport * as type from './type';\nimport * as UrlUtils from './url';\nimport { XhrIo } from './xhrio';\n\n/**\n * Throws the UNKNOWN FirebaseStorageError if cndn is false.\n */\nexport function handlerCheck(cndn: boolean): void {\n  if (!cndn) {\n    throw unknown();\n  }\n}\n\nexport function metadataHandler(\n  authWrapper: AuthWrapper,\n  mappings: MetadataUtils.Mappings\n): (p1: XhrIo, p2: string) => Metadata {\n  function handler(xhr: XhrIo, text: string): Metadata {\n    const metadata = MetadataUtils.fromResourceString(\n      authWrapper,\n      text,\n      mappings\n    );\n    handlerCheck(metadata !== null);\n    return metadata as Metadata;\n  }\n  return handler;\n}\n\nexport function listHandler(\n  authWrapper: AuthWrapper\n): (p1: XhrIo, p2: string) => ListResult {\n  function handler(xhr: XhrIo, text: string): ListResult {\n    const listResult = ListResultUtils.fromResponseString(authWrapper, text);\n    handlerCheck(listResult !== null);\n    return listResult as ListResult;\n  }\n  return handler;\n}\n\nexport function downloadUrlHandler(\n  authWrapper: AuthWrapper,\n  mappings: MetadataUtils.Mappings\n): (p1: XhrIo, p2: string) => string | null {\n  function handler(xhr: XhrIo, text: string): string | null {\n    const metadata = MetadataUtils.fromResourceString(\n      authWrapper,\n      text,\n      mappings\n    );\n    handlerCheck(metadata !== null);\n    return MetadataUtils.downloadUrlFromResourceString(\n      metadata as Metadata,\n      text\n    );\n  }\n  return handler;\n}\n\nexport function sharedErrorHandler(\n  location: Location\n): (p1: XhrIo, p2: FirebaseStorageError) => FirebaseStorageError {\n  function errorHandler(\n    xhr: XhrIo,\n    err: FirebaseStorageError\n  ): FirebaseStorageError {\n    let newErr;\n    if (xhr.getStatus() === 401) {\n      newErr = unauthenticated();\n    } else {\n      if (xhr.getStatus() === 402) {\n        newErr = quotaExceeded(location.bucket);\n      } else {\n        if (xhr.getStatus() === 403) {\n          newErr = unauthorized(location.path);\n        } else {\n          newErr = err;\n        }\n      }\n    }\n    newErr.setServerResponseProp(err.serverResponseProp());\n    return newErr;\n  }\n  return errorHandler;\n}\n\nexport function objectErrorHandler(\n  location: Location\n): (p1: XhrIo, p2: FirebaseStorageError) => FirebaseStorageError {\n  const shared = sharedErrorHandler(location);\n\n  function errorHandler(\n    xhr: XhrIo,\n    err: FirebaseStorageError\n  ): FirebaseStorageError {\n    let newErr = shared(xhr, err);\n    if (xhr.getStatus() === 404) {\n      newErr = objectNotFound(location.path);\n    }\n    newErr.setServerResponseProp(err.serverResponseProp());\n    return newErr;\n  }\n  return errorHandler;\n}\n\nexport function getMetadata(\n  authWrapper: AuthWrapper,\n  location: Location,\n  mappings: MetadataUtils.Mappings\n): RequestInfo<Metadata> {\n  const urlPart = location.fullServerUrl();\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'GET';\n  const timeout = authWrapper.maxOperationRetryTime();\n  const requestInfo = new RequestInfo(\n    url,\n    method,\n    metadataHandler(authWrapper, mappings),\n    timeout\n  );\n  requestInfo.errorHandler = objectErrorHandler(location);\n  return requestInfo;\n}\n\nexport function list(\n  authWrapper: AuthWrapper,\n  location: Location,\n  delimiter?: string,\n  pageToken?: string | null,\n  maxResults?: number | null\n): RequestInfo<ListResult> {\n  const urlParams: UrlParams = {};\n  if (location.isRoot) {\n    urlParams['prefix'] = '';\n  } else {\n    urlParams['prefix'] = location.path + '/';\n  }\n  if (delimiter && delimiter.length > 0) {\n    urlParams['delimiter'] = delimiter;\n  }\n  if (pageToken) {\n    urlParams['pageToken'] = pageToken;\n  }\n  if (maxResults) {\n    urlParams['maxResults'] = maxResults;\n  }\n  const urlPart = location.bucketOnlyServerUrl();\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'GET';\n  const timeout = authWrapper.maxOperationRetryTime();\n  const requestInfo = new RequestInfo(\n    url,\n    method,\n    listHandler(authWrapper),\n    timeout\n  );\n  requestInfo.urlParams = urlParams;\n  requestInfo.errorHandler = sharedErrorHandler(location);\n  return requestInfo;\n}\n\nexport function getDownloadUrl(\n  authWrapper: AuthWrapper,\n  location: Location,\n  mappings: MetadataUtils.Mappings\n): RequestInfo<string | null> {\n  const urlPart = location.fullServerUrl();\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'GET';\n  const timeout = authWrapper.maxOperationRetryTime();\n  const requestInfo = new RequestInfo(\n    url,\n    method,\n    downloadUrlHandler(authWrapper, mappings),\n    timeout\n  );\n  requestInfo.errorHandler = objectErrorHandler(location);\n  return requestInfo;\n}\n\nexport function updateMetadata(\n  authWrapper: AuthWrapper,\n  location: Location,\n  metadata: Metadata,\n  mappings: MetadataUtils.Mappings\n): RequestInfo<Metadata> {\n  const urlPart = location.fullServerUrl();\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'PATCH';\n  const body = MetadataUtils.toResourceString(metadata, mappings);\n  const headers = { 'Content-Type': 'application/json; charset=utf-8' };\n  const timeout = authWrapper.maxOperationRetryTime();\n  const requestInfo = new RequestInfo(\n    url,\n    method,\n    metadataHandler(authWrapper, mappings),\n    timeout\n  );\n  requestInfo.headers = headers;\n  requestInfo.body = body;\n  requestInfo.errorHandler = objectErrorHandler(location);\n  return requestInfo;\n}\n\nexport function deleteObject(\n  authWrapper: AuthWrapper,\n  location: Location\n): RequestInfo<void> {\n  const urlPart = location.fullServerUrl();\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'DELETE';\n  const timeout = authWrapper.maxOperationRetryTime();\n\n  function handler(_xhr: XhrIo, _text: string): void {}\n  const requestInfo = new RequestInfo(url, method, handler, timeout);\n  requestInfo.successCodes = [200, 204];\n  requestInfo.errorHandler = objectErrorHandler(location);\n  return requestInfo;\n}\n\nexport function determineContentType_(\n  metadata: Metadata | null,\n  blob: FbsBlob | null\n): string {\n  return (\n    (metadata && metadata['contentType']) ||\n    (blob && blob.type()) ||\n    'application/octet-stream'\n  );\n}\n\nexport function metadataForUpload_(\n  location: Location,\n  blob: FbsBlob,\n  metadata?: Metadata | null\n): Metadata {\n  const metadataClone = Object.assign({}, metadata);\n  metadataClone['fullPath'] = location.path;\n  metadataClone['size'] = blob.size();\n  if (!metadataClone['contentType']) {\n    metadataClone['contentType'] = determineContentType_(null, blob);\n  }\n  return metadataClone;\n}\n\nexport function multipartUpload(\n  authWrapper: AuthWrapper,\n  location: Location,\n  mappings: MetadataUtils.Mappings,\n  blob: FbsBlob,\n  metadata?: Metadata | null\n): RequestInfo<Metadata> {\n  const urlPart = location.bucketOnlyServerUrl();\n  const headers: { [prop: string]: string } = {\n    'X-Goog-Upload-Protocol': 'multipart'\n  };\n\n  function genBoundary(): string {\n    let str = '';\n    for (let i = 0; i < 2; i++) {\n      str =\n        str +\n        Math.random()\n          .toString()\n          .slice(2);\n    }\n    return str;\n  }\n  const boundary = genBoundary();\n  headers['Content-Type'] = 'multipart/related; boundary=' + boundary;\n  const metadata_ = metadataForUpload_(location, blob, metadata);\n  const metadataString = MetadataUtils.toResourceString(metadata_, mappings);\n  const preBlobPart =\n    '--' +\n    boundary +\n    '\\r\\n' +\n    'Content-Type: application/json; charset=utf-8\\r\\n\\r\\n' +\n    metadataString +\n    '\\r\\n--' +\n    boundary +\n    '\\r\\n' +\n    'Content-Type: ' +\n    metadata_['contentType'] +\n    '\\r\\n\\r\\n';\n  const postBlobPart = '\\r\\n--' + boundary + '--';\n  const body = FbsBlob.getBlob(preBlobPart, blob, postBlobPart);\n  if (body === null) {\n    throw cannotSliceBlob();\n  }\n  const urlParams: UrlParams = { name: metadata_['fullPath']! };\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'POST';\n  const timeout = authWrapper.maxUploadRetryTime();\n  const requestInfo = new RequestInfo(\n    url,\n    method,\n    metadataHandler(authWrapper, mappings),\n    timeout\n  );\n  requestInfo.urlParams = urlParams;\n  requestInfo.headers = headers;\n  requestInfo.body = body.uploadData();\n  requestInfo.errorHandler = sharedErrorHandler(location);\n  return requestInfo;\n}\n\n/**\n * @param current The number of bytes that have been uploaded so far.\n * @param total The total number of bytes in the upload.\n * @param opt_finalized True if the server has finished the upload.\n * @param opt_metadata The upload metadata, should\n *     only be passed if opt_finalized is true.\n * @struct\n */\nexport class ResumableUploadStatus {\n  finalized: boolean;\n  metadata: Metadata | null;\n\n  constructor(\n    public current: number,\n    public total: number,\n    finalized?: boolean,\n    metadata?: Metadata | null\n  ) {\n    this.finalized = !!finalized;\n    this.metadata = metadata || null;\n  }\n}\n\nexport function checkResumeHeader_(xhr: XhrIo, allowed?: string[]): string {\n  let status: string | null = null;\n  try {\n    status = xhr.getResponseHeader('X-Goog-Upload-Status');\n  } catch (e) {\n    handlerCheck(false);\n  }\n  const allowedStatus = allowed || ['active'];\n  handlerCheck(!!status && allowedStatus.indexOf(status) !== -1);\n  return status as string;\n}\n\nexport function createResumableUpload(\n  authWrapper: AuthWrapper,\n  location: Location,\n  mappings: MetadataUtils.Mappings,\n  blob: FbsBlob,\n  metadata?: Metadata | null\n): RequestInfo<string> {\n  const urlPart = location.bucketOnlyServerUrl();\n  const metadataForUpload = metadataForUpload_(location, blob, metadata);\n  const urlParams: UrlParams = { name: metadataForUpload['fullPath']! };\n  const url = UrlUtils.makeUrl(urlPart);\n  const method = 'POST';\n  const headers = {\n    'X-Goog-Upload-Protocol': 'resumable',\n    'X-Goog-Upload-Command': 'start',\n    'X-Goog-Upload-Header-Content-Length': blob.size(),\n    'X-Goog-Upload-Header-Content-Type': metadataForUpload['contentType']!,\n    'Content-Type': 'application/json; charset=utf-8'\n  };\n  const body = MetadataUtils.toResourceString(metadataForUpload, mappings);\n  const timeout = authWrapper.maxUploadRetryTime();\n\n  function handler(xhr: XhrIo): string {\n    checkResumeHeader_(xhr);\n    let url;\n    try {\n      url = xhr.getResponseHeader('X-Goog-Upload-URL');\n    } catch (e) {\n      handlerCheck(false);\n    }\n    handlerCheck(type.isString(url));\n    return url as string;\n  }\n  const requestInfo = new RequestInfo(url, method, handler, timeout);\n  requestInfo.urlParams = urlParams;\n  requestInfo.headers = headers;\n  requestInfo.body = body;\n  requestInfo.errorHandler = sharedErrorHandler(location);\n  return requestInfo;\n}\n\n/**\n * @param url From a call to fbs.requests.createResumableUpload.\n */\nexport function getResumableUploadStatus(\n  authWrapper: AuthWrapper,\n  location: Location,\n  url: string,\n  blob: FbsBlob\n): RequestInfo<ResumableUploadStatus> {\n  const headers = { 'X-Goog-Upload-Command': 'query' };\n\n  function handler(xhr: XhrIo): ResumableUploadStatus {\n    const status = checkResumeHeader_(xhr, ['active', 'final']);\n    let sizeString: string | null = null;\n    try {\n      sizeString = xhr.getResponseHeader('X-Goog-Upload-Size-Received');\n    } catch (e) {\n      handlerCheck(false);\n    }\n\n    if (!sizeString) {\n      // null or empty string\n      handlerCheck(false);\n    }\n\n    const size = Number(sizeString);\n    handlerCheck(!isNaN(size));\n    return new ResumableUploadStatus(size, blob.size(), status === 'final');\n  }\n  const method = 'POST';\n  const timeout = authWrapper.maxUploadRetryTime();\n  const requestInfo = new RequestInfo(url, method, handler, timeout);\n  requestInfo.headers = headers;\n  requestInfo.errorHandler = sharedErrorHandler(location);\n  return requestInfo;\n}\n\n/**\n * Any uploads via the resumable upload API must transfer a number of bytes\n * that is a multiple of this number.\n */\nexport const resumableUploadChunkSize: number = 256 * 1024;\n\n/**\n * @param url From a call to fbs.requests.createResumableUpload.\n * @param chunkSize Number of bytes to upload.\n * @param status The previous status.\n *     If not passed or null, we start from the beginning.\n * @throws fbs.Error If the upload is already complete, the passed in status\n *     has a final size inconsistent with the blob, or the blob cannot be sliced\n *     for upload.\n */\nexport function continueResumableUpload(\n  location: Location,\n  authWrapper: AuthWrapper,\n  url: string,\n  blob: FbsBlob,\n  chunkSize: number,\n  mappings: MetadataUtils.Mappings,\n  status?: ResumableUploadStatus | null,\n  progressCallback?: ((p1: number, p2: number) => void) | null\n): RequestInfo<ResumableUploadStatus> {\n  // TODO(andysoto): standardize on internal asserts\n  // assert(!(opt_status && opt_status.finalized));\n  const status_ = new ResumableUploadStatus(0, 0);\n  if (status) {\n    status_.current = status.current;\n    status_.total = status.total;\n  } else {\n    status_.current = 0;\n    status_.total = blob.size();\n  }\n  if (blob.size() !== status_.total) {\n    throw serverFileWrongSize();\n  }\n  const bytesLeft = status_.total - status_.current;\n  let bytesToUpload = bytesLeft;\n  if (chunkSize > 0) {\n    bytesToUpload = Math.min(bytesToUpload, chunkSize);\n  }\n  const startByte = status_.current;\n  const endByte = startByte + bytesToUpload;\n  const uploadCommand =\n    bytesToUpload === bytesLeft ? 'upload, finalize' : 'upload';\n  const headers = {\n    'X-Goog-Upload-Command': uploadCommand,\n    'X-Goog-Upload-Offset': status_.current\n  };\n  const body = blob.slice(startByte, endByte);\n  if (body === null) {\n    throw cannotSliceBlob();\n  }\n\n  function handler(xhr: XhrIo, text: string): ResumableUploadStatus {\n    // TODO(andysoto): Verify the MD5 of each uploaded range:\n    // the 'x-range-md5' header comes back with status code 308 responses.\n    // We'll only be able to bail out though, because you can't re-upload a\n    // range that you previously uploaded.\n    const uploadStatus = checkResumeHeader_(xhr, ['active', 'final']);\n    const newCurrent = status_.current + bytesToUpload;\n    const size = blob.size();\n    let metadata;\n    if (uploadStatus === 'final') {\n      metadata = metadataHandler(authWrapper, mappings)(xhr, text);\n    } else {\n      metadata = null;\n    }\n    return new ResumableUploadStatus(\n      newCurrent,\n      size,\n      uploadStatus === 'final',\n      metadata\n    );\n  }\n  const method = 'POST';\n  const timeout = authWrapper.maxUploadRetryTime();\n  const requestInfo = new RequestInfo(url, method, handler, timeout);\n  requestInfo.headers = headers;\n  requestInfo.body = body.uploadData();\n  requestInfo.progressCallback = progressCallback || null;\n  requestInfo.errorHandler = sharedErrorHandler(location);\n  return requestInfo;\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport * as type from './type';\nimport { FirebaseStorageError } from './error';\n\nexport type NextFn<T> = (value: T) => void;\nexport type ErrorFn = (error: Error | FirebaseStorageError) => void;\nexport type CompleteFn = () => void;\nexport type Unsubscribe = () => void;\n\nexport interface StorageObserver<T> {\n  next?: NextFn<T> | null;\n  error?: ErrorFn | null;\n  complete?: CompleteFn | null;\n}\n\nexport type Subscribe<T> = (\n  next?: NextFn<T> | StorageObserver<T> | null,\n  error?: ErrorFn | null,\n  complete?: CompleteFn | null\n) => Unsubscribe;\n\n/**\n * @struct\n */\nexport class Observer<T> implements StorageObserver<T> {\n  next?: NextFn<T> | null;\n  error?: ErrorFn | null;\n  complete?: CompleteFn | null;\n\n  constructor(\n    nextOrObserver?: NextFn<T> | StorageObserver<T> | null,\n    error?: ErrorFn | null,\n    complete?: CompleteFn | null\n  ) {\n    const asFunctions =\n      type.isFunction(nextOrObserver) ||\n      type.isDef(error) ||\n      type.isDef(complete);\n    if (asFunctions) {\n      this.next = nextOrObserver as NextFn<T> | null;\n      this.error = error || null;\n      this.complete = complete || null;\n    } else {\n      const observer = nextOrObserver as {\n        next?: NextFn<T> | null;\n        error?: ErrorFn | null;\n        complete?: CompleteFn | null;\n      };\n      this.next = observer.next || null;\n      this.error = observer.error || null;\n      this.complete = observer.complete || null;\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { TaskState } from './implementation/taskenums';\nimport { Metadata } from './metadata';\nimport { Reference } from './reference';\nimport { UploadTask } from './task';\n\nexport class UploadTaskSnapshot {\n  constructor(\n    readonly bytesTransferred: number,\n    readonly totalBytes: number,\n    readonly state: TaskState,\n    readonly metadata: Metadata | null,\n    readonly task: UploadTask,\n    readonly ref: Reference\n  ) {}\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport * as errorsExports from './error';\nimport * as MetadataUtils from './metadata';\nimport * as ListOptionsUtils from './list';\nimport * as type from './type';\n\n/**\n * @param name Name of the function.\n * @param specs Argument specs.\n * @param passed The actual arguments passed to the function.\n * @throws {fbs.Error} If the arguments are invalid.\n */\nexport function validate(\n  name: string,\n  specs: ArgSpec[],\n  passed: IArguments\n): void {\n  let minArgs = specs.length;\n  const maxArgs = specs.length;\n  for (let i = 0; i < specs.length; i++) {\n    if (specs[i].optional) {\n      minArgs = i;\n      break;\n    }\n  }\n  const validLength = minArgs <= passed.length && passed.length <= maxArgs;\n  if (!validLength) {\n    throw errorsExports.invalidArgumentCount(\n      minArgs,\n      maxArgs,\n      name,\n      passed.length\n    );\n  }\n  for (let i = 0; i < passed.length; i++) {\n    try {\n      specs[i].validator(passed[i]);\n    } catch (e) {\n      if (e instanceof Error) {\n        throw errorsExports.invalidArgument(i, name, e.message);\n      } else {\n        throw errorsExports.invalidArgument(i, name, e);\n      }\n    }\n  }\n}\n\n/**\n * @struct\n */\nexport class ArgSpec {\n  validator: (p1: unknown) => void;\n  optional: boolean;\n\n  constructor(validator: (p1: unknown) => void, optional?: boolean) {\n    const self = this;\n    this.validator = function(p: unknown) {\n      if (self.optional && !type.isJustDef(p)) {\n        return;\n      }\n      validator(p);\n    };\n    this.optional = !!optional;\n  }\n}\n\nexport function and_(\n  v1: (p1: unknown) => void,\n  v2: (p1: unknown) => void\n): (p1: unknown) => void {\n  return function(p) {\n    v1(p);\n    v2(p);\n  };\n}\n\nexport function stringSpec(\n  validator?: (p1: unknown) => void | null,\n  optional?: boolean\n): ArgSpec {\n  function stringValidator(p: unknown): void {\n    if (!type.isString(p)) {\n      throw 'Expected string.';\n    }\n  }\n  let chainedValidator;\n  if (validator) {\n    chainedValidator = and_(stringValidator, validator);\n  } else {\n    chainedValidator = stringValidator;\n  }\n  return new ArgSpec(chainedValidator, optional);\n}\n\nexport function uploadDataSpec(): ArgSpec {\n  function validator(p: unknown): void {\n    const valid =\n      p instanceof Uint8Array ||\n      p instanceof ArrayBuffer ||\n      (type.isNativeBlobDefined() && p instanceof Blob);\n    if (!valid) {\n      throw 'Expected Blob or File.';\n    }\n  }\n  return new ArgSpec(validator);\n}\n\nexport function metadataSpec(optional?: boolean): ArgSpec {\n  return new ArgSpec(MetadataUtils.metadataValidator, optional);\n}\n\nexport function listOptionSpec(optional?: boolean): ArgSpec {\n  return new ArgSpec(ListOptionsUtils.listOptionsValidator, optional);\n}\n\nexport function nonNegativeNumberSpec(): ArgSpec {\n  function validator(p: unknown): void {\n    const valid = type.isNumber(p) && p >= 0;\n    if (!valid) {\n      throw 'Expected a number 0 or greater.';\n    }\n  }\n  return new ArgSpec(validator);\n}\n\nexport function looseObjectSpec(\n  validator?: ((p1: unknown) => void) | null,\n  optional?: boolean\n): ArgSpec {\n  function isLooseObjectValidator(p: unknown): void {\n    const isLooseObject = p === null || (type.isDef(p) && p instanceof Object);\n    if (!isLooseObject) {\n      throw 'Expected an Object.';\n    }\n    if (validator !== undefined && validator !== null) {\n      validator(p);\n    }\n  }\n  return new ArgSpec(isLooseObjectValidator, optional);\n}\n\nexport function nullFunctionSpec(optional?: boolean): ArgSpec {\n  function validator(p: unknown): void {\n    const valid = p === null || type.isFunction(p);\n    if (!valid) {\n      throw 'Expected a Function.';\n    }\n  }\n  return new ArgSpec(validator, optional);\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * Returns a function that invokes f with its arguments asynchronously as a\n * microtask, i.e. as soon as possible after the current script returns back\n * into browser code.\n */\nexport function async(f: Function): Function {\n  return (...argsToForward: unknown[]) => {\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    Promise.resolve().then(() => f(...argsToForward));\n  };\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/**\n * @fileoverview Defines types for interacting with blob transfer tasks.\n */\n\nimport { AuthWrapper } from './implementation/authwrapper';\nimport { FbsBlob } from './implementation/blob';\nimport { FirebaseStorageError, Code, canceled } from './implementation/error';\nimport {\n  InternalTaskState,\n  TaskEvent,\n  TaskState,\n  taskStateFromInternalTaskState\n} from './implementation/taskenums';\nimport { Metadata } from './metadata';\nimport {\n  CompleteFn,\n  ErrorFn,\n  NextFn,\n  Observer,\n  StorageObserver,\n  Subscribe,\n  Unsubscribe\n} from './implementation/observer';\nimport { Request } from './implementation/request';\nimport { UploadTaskSnapshot } from './tasksnapshot';\nimport {\n  ArgSpec,\n  nullFunctionSpec,\n  looseObjectSpec,\n  stringSpec,\n  validate\n} from './implementation/args';\nimport { async as fbsAsync } from './implementation/async';\nimport { Location } from './implementation/location';\nimport * as fbsMetadata from './implementation/metadata';\nimport * as fbsRequests from './implementation/requests';\nimport * as typeUtils from './implementation/type';\nimport { Reference } from './reference';\n\n/**\n * Represents a blob being uploaded. Can be used to pause/resume/cancel the\n * upload and manage callbacks for various events.\n */\nexport class UploadTask {\n  private ref_: Reference;\n  private authWrapper_: AuthWrapper;\n  private location_: Location;\n  private blob_: FbsBlob;\n  private metadata_: Metadata | null;\n  private mappings_: fbsMetadata.Mappings;\n  private transferred_: number = 0;\n  private needToFetchStatus_: boolean = false;\n  private needToFetchMetadata_: boolean = false;\n  private observers_: Array<Observer<UploadTaskSnapshot>> = [];\n  private resumable_: boolean;\n  private state_: InternalTaskState;\n  private error_: Error | null = null;\n  private uploadUrl_: string | null = null;\n  private request_: Request<unknown> | null = null;\n  private chunkMultiplier_: number = 1;\n  private errorHandler_: (p1: FirebaseStorageError) => void;\n  private metadataErrorHandler_: (p1: FirebaseStorageError) => void;\n  private resolve_: ((p1: UploadTaskSnapshot) => void) | null = null;\n  private reject_: ((p1: Error) => void) | null = null;\n  private promise_: Promise<UploadTaskSnapshot>;\n\n  /**\n   * @param ref The firebaseStorage.Reference object this task came\n   *     from, untyped to avoid cyclic dependencies.\n   * @param blob The blob to upload.\n   */\n  constructor(\n    ref: Reference,\n    authWrapper: AuthWrapper,\n    location: Location,\n    mappings: fbsMetadata.Mappings,\n    blob: FbsBlob,\n    metadata: Metadata | null = null\n  ) {\n    this.ref_ = ref;\n    this.authWrapper_ = authWrapper;\n    this.location_ = location;\n    this.blob_ = blob;\n    this.metadata_ = metadata;\n    this.mappings_ = mappings;\n    this.resumable_ = this.shouldDoResumable_(this.blob_);\n    this.state_ = InternalTaskState.RUNNING;\n    this.errorHandler_ = error => {\n      this.request_ = null;\n      this.chunkMultiplier_ = 1;\n      if (error.codeEquals(Code.CANCELED)) {\n        this.needToFetchStatus_ = true;\n        this.completeTransitions_();\n      } else {\n        this.error_ = error;\n        this.transition_(InternalTaskState.ERROR);\n      }\n    };\n    this.metadataErrorHandler_ = error => {\n      this.request_ = null;\n      if (error.codeEquals(Code.CANCELED)) {\n        this.completeTransitions_();\n      } else {\n        this.error_ = error;\n        this.transition_(InternalTaskState.ERROR);\n      }\n    };\n    this.promise_ = new Promise((resolve, reject) => {\n      this.resolve_ = resolve;\n      this.reject_ = reject;\n      this.start_();\n    });\n\n    // Prevent uncaught rejections on the internal promise from bubbling out\n    // to the top level with a dummy handler.\n    this.promise_.then(null, () => {});\n  }\n\n  private makeProgressCallback_(): (p1: number, p2: number) => void {\n    const sizeBefore = this.transferred_;\n    return loaded => this.updateProgress_(sizeBefore + loaded);\n  }\n\n  private shouldDoResumable_(blob: FbsBlob): boolean {\n    return blob.size() > 256 * 1024;\n  }\n\n  private start_(): void {\n    if (this.state_ !== InternalTaskState.RUNNING) {\n      // This can happen if someone pauses us in a resume callback, for example.\n      return;\n    }\n    if (this.request_ !== null) {\n      return;\n    }\n    if (this.resumable_) {\n      if (this.uploadUrl_ === null) {\n        this.createResumable_();\n      } else {\n        if (this.needToFetchStatus_) {\n          this.fetchStatus_();\n        } else {\n          if (this.needToFetchMetadata_) {\n            // Happens if we miss the metadata on upload completion.\n            this.fetchMetadata_();\n          } else {\n            this.continueUpload_();\n          }\n        }\n      }\n    } else {\n      this.oneShotUpload_();\n    }\n  }\n\n  private resolveToken_(callback: (p1: string | null) => void): void {\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    this.authWrapper_.getAuthToken().then(authToken => {\n      switch (this.state_) {\n        case InternalTaskState.RUNNING:\n          callback(authToken);\n          break;\n        case InternalTaskState.CANCELING:\n          this.transition_(InternalTaskState.CANCELED);\n          break;\n        case InternalTaskState.PAUSING:\n          this.transition_(InternalTaskState.PAUSED);\n          break;\n        default:\n      }\n    });\n  }\n\n  // TODO(andysoto): assert false\n\n  private createResumable_(): void {\n    this.resolveToken_(authToken => {\n      const requestInfo = fbsRequests.createResumableUpload(\n        this.authWrapper_,\n        this.location_,\n        this.mappings_,\n        this.blob_,\n        this.metadata_\n      );\n      const createRequest = this.authWrapper_.makeRequest(\n        requestInfo,\n        authToken\n      );\n      this.request_ = createRequest;\n      createRequest.getPromise().then((url: string) => {\n        this.request_ = null;\n        this.uploadUrl_ = url;\n        this.needToFetchStatus_ = false;\n        this.completeTransitions_();\n      }, this.errorHandler_);\n    });\n  }\n\n  private fetchStatus_(): void {\n    // TODO(andysoto): assert(this.uploadUrl_ !== null);\n    const url = this.uploadUrl_ as string;\n    this.resolveToken_(authToken => {\n      const requestInfo = fbsRequests.getResumableUploadStatus(\n        this.authWrapper_,\n        this.location_,\n        url,\n        this.blob_\n      );\n      const statusRequest = this.authWrapper_.makeRequest(\n        requestInfo,\n        authToken\n      );\n      this.request_ = statusRequest;\n      statusRequest.getPromise().then(status => {\n        status = status as fbsRequests.ResumableUploadStatus;\n        this.request_ = null;\n        this.updateProgress_(status.current);\n        this.needToFetchStatus_ = false;\n        if (status.finalized) {\n          this.needToFetchMetadata_ = true;\n        }\n        this.completeTransitions_();\n      }, this.errorHandler_);\n    });\n  }\n\n  private continueUpload_(): void {\n    const chunkSize =\n      fbsRequests.resumableUploadChunkSize * this.chunkMultiplier_;\n    const status = new fbsRequests.ResumableUploadStatus(\n      this.transferred_,\n      this.blob_.size()\n    );\n\n    // TODO(andysoto): assert(this.uploadUrl_ !== null);\n    const url = this.uploadUrl_ as string;\n    this.resolveToken_(authToken => {\n      let requestInfo;\n      try {\n        requestInfo = fbsRequests.continueResumableUpload(\n          this.location_,\n          this.authWrapper_,\n          url,\n          this.blob_,\n          chunkSize,\n          this.mappings_,\n          status,\n          this.makeProgressCallback_()\n        );\n      } catch (e) {\n        this.error_ = e;\n        this.transition_(InternalTaskState.ERROR);\n        return;\n      }\n      const uploadRequest = this.authWrapper_.makeRequest(\n        requestInfo,\n        authToken\n      );\n      this.request_ = uploadRequest;\n      uploadRequest\n        .getPromise()\n        .then((newStatus: fbsRequests.ResumableUploadStatus) => {\n          this.increaseMultiplier_();\n          this.request_ = null;\n          this.updateProgress_(newStatus.current);\n          if (newStatus.finalized) {\n            this.metadata_ = newStatus.metadata;\n            this.transition_(InternalTaskState.SUCCESS);\n          } else {\n            this.completeTransitions_();\n          }\n        }, this.errorHandler_);\n    });\n  }\n\n  private increaseMultiplier_(): void {\n    const currentSize =\n      fbsRequests.resumableUploadChunkSize * this.chunkMultiplier_;\n\n    // Max chunk size is 32M.\n    if (currentSize < 32 * 1024 * 1024) {\n      this.chunkMultiplier_ *= 2;\n    }\n  }\n\n  private fetchMetadata_(): void {\n    this.resolveToken_(authToken => {\n      const requestInfo = fbsRequests.getMetadata(\n        this.authWrapper_,\n        this.location_,\n        this.mappings_\n      );\n      const metadataRequest = this.authWrapper_.makeRequest(\n        requestInfo,\n        authToken\n      );\n      this.request_ = metadataRequest;\n      metadataRequest.getPromise().then(metadata => {\n        this.request_ = null;\n        this.metadata_ = metadata;\n        this.transition_(InternalTaskState.SUCCESS);\n      }, this.metadataErrorHandler_);\n    });\n  }\n\n  private oneShotUpload_(): void {\n    this.resolveToken_(authToken => {\n      const requestInfo = fbsRequests.multipartUpload(\n        this.authWrapper_,\n        this.location_,\n        this.mappings_,\n        this.blob_,\n        this.metadata_\n      );\n      const multipartRequest = this.authWrapper_.makeRequest(\n        requestInfo,\n        authToken\n      );\n      this.request_ = multipartRequest;\n      multipartRequest.getPromise().then(metadata => {\n        this.request_ = null;\n        this.metadata_ = metadata;\n        this.updateProgress_(this.blob_.size());\n        this.transition_(InternalTaskState.SUCCESS);\n      }, this.errorHandler_);\n    });\n  }\n\n  private updateProgress_(transferred: number): void {\n    const old = this.transferred_;\n    this.transferred_ = transferred;\n\n    // A progress update can make the \"transferred\" value smaller (e.g. a\n    // partial upload not completed by server, after which the \"transferred\"\n    // value may reset to the value at the beginning of the request).\n    if (this.transferred_ !== old) {\n      this.notifyObservers_();\n    }\n  }\n\n  private transition_(state: InternalTaskState): void {\n    if (this.state_ === state) {\n      return;\n    }\n    switch (state) {\n      case InternalTaskState.CANCELING:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.RUNNING ||\n        //        this.state_ === InternalTaskState.PAUSING);\n        this.state_ = state;\n        if (this.request_ !== null) {\n          this.request_.cancel();\n        }\n        break;\n      case InternalTaskState.PAUSING:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.RUNNING);\n        this.state_ = state;\n        if (this.request_ !== null) {\n          this.request_.cancel();\n        }\n        break;\n      case InternalTaskState.RUNNING:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.PAUSED ||\n        //        this.state_ === InternalTaskState.PAUSING);\n        const wasPaused = this.state_ === InternalTaskState.PAUSED;\n        this.state_ = state;\n        if (wasPaused) {\n          this.notifyObservers_();\n          this.start_();\n        }\n        break;\n      case InternalTaskState.PAUSED:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.PAUSING);\n        this.state_ = state;\n        this.notifyObservers_();\n        break;\n      case InternalTaskState.CANCELED:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.PAUSED ||\n        //        this.state_ === InternalTaskState.CANCELING);\n        this.error_ = canceled();\n        this.state_ = state;\n        this.notifyObservers_();\n        break;\n      case InternalTaskState.ERROR:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.RUNNING ||\n        //        this.state_ === InternalTaskState.PAUSING ||\n        //        this.state_ === InternalTaskState.CANCELING);\n        this.state_ = state;\n        this.notifyObservers_();\n        break;\n      case InternalTaskState.SUCCESS:\n        // TODO(andysoto):\n        // assert(this.state_ === InternalTaskState.RUNNING ||\n        //        this.state_ === InternalTaskState.PAUSING ||\n        //        this.state_ === InternalTaskState.CANCELING);\n        this.state_ = state;\n        this.notifyObservers_();\n        break;\n      default: // Ignore\n    }\n  }\n\n  private completeTransitions_(): void {\n    switch (this.state_) {\n      case InternalTaskState.PAUSING:\n        this.transition_(InternalTaskState.PAUSED);\n        break;\n      case InternalTaskState.CANCELING:\n        this.transition_(InternalTaskState.CANCELED);\n        break;\n      case InternalTaskState.RUNNING:\n        this.start_();\n        break;\n      default:\n        // TODO(andysoto): assert(false);\n        break;\n    }\n  }\n\n  get snapshot(): UploadTaskSnapshot {\n    const externalState = taskStateFromInternalTaskState(this.state_);\n    return new UploadTaskSnapshot(\n      this.transferred_,\n      this.blob_.size(),\n      externalState,\n      this.metadata_,\n      this,\n      this.ref_\n    );\n  }\n\n  /**\n   * Adds a callback for an event.\n   * @param type The type of event to listen for.\n   */\n  on(\n    type: TaskEvent,\n    nextOrObserver?:\n      | NextFn<UploadTaskSnapshot>\n      | StorageObserver<UploadTaskSnapshot>\n      | null,\n    error?: ErrorFn | null,\n    completed?: CompleteFn | null\n  ): Unsubscribe | Subscribe<UploadTaskSnapshot> {\n    function typeValidator(): void {\n      if (type !== TaskEvent.STATE_CHANGED) {\n        throw `Expected one of the event types: [${TaskEvent.STATE_CHANGED}].`;\n      }\n    }\n    const nextOrObserverMessage =\n      'Expected a function or an Object with one of ' +\n      '`next`, `error`, `complete` properties.';\n    const nextValidator = nullFunctionSpec(true).validator;\n    const observerValidator = looseObjectSpec(null, true).validator;\n\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    function nextOrObserverValidator(p: any): void {\n      try {\n        nextValidator(p);\n        return;\n      } catch (e) {}\n      try {\n        observerValidator(p);\n        const anyDefined =\n          typeUtils.isJustDef(p['next']) ||\n          typeUtils.isJustDef(p['error']) ||\n          typeUtils.isJustDef(p['complete']);\n        if (!anyDefined) {\n          throw '';\n        }\n        return;\n      } catch (e) {\n        throw nextOrObserverMessage;\n      }\n    }\n    const specs = [\n      stringSpec(typeValidator),\n      looseObjectSpec(nextOrObserverValidator, true),\n      nullFunctionSpec(true),\n      nullFunctionSpec(true)\n    ];\n    validate('on', specs, arguments);\n    const self = this;\n\n    function makeBinder(\n      specs: ArgSpec[] | null\n    ): Subscribe<UploadTaskSnapshot> {\n      function binder(\n        nextOrObserver?:\n          | NextFn<UploadTaskSnapshot>\n          | StorageObserver<UploadTaskSnapshot>\n          | null,\n        error?: ErrorFn | null,\n        complete?: CompleteFn | null\n      ): () => void {\n        if (specs !== null) {\n          validate('on', specs, arguments);\n        }\n        const observer = new Observer(nextOrObserver, error, completed);\n        self.addObserver_(observer);\n        return () => {\n          self.removeObserver_(observer);\n        };\n      }\n      return binder;\n    }\n\n    function binderNextOrObserverValidator(p: unknown): void {\n      if (p === null) {\n        throw nextOrObserverMessage;\n      }\n      nextOrObserverValidator(p);\n    }\n    const binderSpecs = [\n      looseObjectSpec(binderNextOrObserverValidator),\n      nullFunctionSpec(true),\n      nullFunctionSpec(true)\n    ];\n    const typeOnly = !(\n      typeUtils.isJustDef(nextOrObserver) ||\n      typeUtils.isJustDef(error) ||\n      typeUtils.isJustDef(completed)\n    );\n    if (typeOnly) {\n      return makeBinder(binderSpecs);\n    } else {\n      return makeBinder(null)(nextOrObserver, error, completed);\n    }\n  }\n\n  /**\n   * This object behaves like a Promise, and resolves with its snapshot data\n   * when the upload completes.\n   * @param onFulfilled The fulfillment callback. Promise chaining works as normal.\n   * @param onRejected The rejection callback.\n   */\n  then<U>(\n    onFulfilled?: ((value: UploadTaskSnapshot) => U | Promise<U>) | null,\n    onRejected?: ((error: Error) => U | Promise<U>) | null\n  ): Promise<U> {\n    // These casts are needed so that TypeScript can infer the types of the\n    // resulting Promise.\n    return this.promise_.then<U>(\n      onFulfilled as (value: UploadTaskSnapshot) => U | Promise<U>,\n      onRejected as ((error: unknown) => Promise<never>) | null\n    );\n  }\n\n  /**\n   * Equivalent to calling `then(null, onRejected)`.\n   */\n  catch<T>(onRejected: (p1: Error) => T | Promise<T>): Promise<T> {\n    return this.then(null, onRejected);\n  }\n\n  /**\n   * Adds the given observer.\n   */\n  private addObserver_(observer: Observer<UploadTaskSnapshot>): void {\n    this.observers_.push(observer);\n    this.notifyObserver_(observer);\n  }\n\n  /**\n   * Removes the given observer.\n   */\n  private removeObserver_(observer: Observer<UploadTaskSnapshot>): void {\n    const i = this.observers_.indexOf(observer);\n    if (i !== -1) {\n      this.observers_.splice(i, 1);\n    }\n  }\n\n  private notifyObservers_(): void {\n    this.finishPromise_();\n    const observers = this.observers_.slice();\n    observers.forEach(observer => {\n      this.notifyObserver_(observer);\n    });\n  }\n\n  private finishPromise_(): void {\n    if (this.resolve_ !== null) {\n      let triggered = true;\n      switch (taskStateFromInternalTaskState(this.state_)) {\n        case TaskState.SUCCESS:\n          fbsAsync(this.resolve_.bind(null, this.snapshot))();\n          break;\n        case TaskState.CANCELED:\n        case TaskState.ERROR:\n          const toCall = this.reject_ as ((p1: Error) => void);\n          fbsAsync(toCall.bind(null, this.error_ as Error))();\n          break;\n        default:\n          triggered = false;\n          break;\n      }\n      if (triggered) {\n        this.resolve_ = null;\n        this.reject_ = null;\n      }\n    }\n  }\n\n  private notifyObserver_(observer: Observer<UploadTaskSnapshot>): void {\n    const externalState = taskStateFromInternalTaskState(this.state_);\n    switch (externalState) {\n      case TaskState.RUNNING:\n      case TaskState.PAUSED:\n        if (observer.next) {\n          fbsAsync(observer.next.bind(observer, this.snapshot))();\n        }\n        break;\n      case TaskState.SUCCESS:\n        if (observer.complete) {\n          fbsAsync(observer.complete.bind(observer))();\n        }\n        break;\n      case TaskState.CANCELED:\n      case TaskState.ERROR:\n        if (observer.error) {\n          fbsAsync(observer.error.bind(observer, this.error_ as Error))();\n        }\n        break;\n      default:\n        // TODO(andysoto): assert(false);\n        if (observer.error) {\n          fbsAsync(observer.error.bind(observer, this.error_ as Error))();\n        }\n    }\n  }\n\n  /**\n   * Resumes a paused task. Has no effect on a currently running or failed task.\n   * @return True if the operation took effect, false if ignored.\n   */\n  resume(): boolean {\n    validate('resume', [], arguments);\n    const valid =\n      this.state_ === InternalTaskState.PAUSED ||\n      this.state_ === InternalTaskState.PAUSING;\n    if (valid) {\n      this.transition_(InternalTaskState.RUNNING);\n    }\n    return valid;\n  }\n\n  /**\n   * Pauses a currently running task. Has no effect on a paused or failed task.\n   * @return True if the operation took effect, false if ignored.\n   */\n  pause(): boolean {\n    validate('pause', [], arguments);\n    const valid = this.state_ === InternalTaskState.RUNNING;\n    if (valid) {\n      this.transition_(InternalTaskState.PAUSING);\n    }\n    return valid;\n  }\n\n  /**\n   * Cancels a currently running or paused task. Has no effect on a complete or\n   * failed task.\n   * @return True if the operation took effect, false if ignored.\n   */\n  cancel(): boolean {\n    validate('cancel', [], arguments);\n    const valid =\n      this.state_ === InternalTaskState.RUNNING ||\n      this.state_ === InternalTaskState.PAUSING;\n    if (valid) {\n      this.transition_(InternalTaskState.CANCELING);\n    }\n    return valid;\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Defines the Firebase Storage Reference class.\n */\nimport { AuthWrapper } from './implementation/authwrapper';\nimport { FbsBlob } from './implementation/blob';\nimport * as errorsExports from './implementation/error';\nimport { Location } from './implementation/location';\nimport * as metadata from './implementation/metadata';\nimport * as path from './implementation/path';\nimport * as requests from './implementation/requests';\nimport {\n  StringFormat,\n  formatValidator,\n  dataFromString\n} from './implementation/string';\nimport * as type from './implementation/type';\nimport { Metadata } from './metadata';\nimport { Service } from './service';\nimport { UploadTask } from './task';\nimport { ListOptions, ListResult } from './list';\nimport {\n  listOptionSpec,\n  stringSpec,\n  validate,\n  metadataSpec,\n  uploadDataSpec\n} from './implementation/args';\n\n/**\n * Provides methods to interact with a bucket in the Firebase Storage service.\n * @param location An fbs.location, or the URL at\n *     which to base this object, in one of the following forms:\n *         gs://<bucket>/<object-path>\n *         http[s]://firebasestorage.googleapis.com/\n *                     <api-version>/b/<bucket>/o/<object-path>\n *     Any query or fragment strings will be ignored in the http[s]\n *     format. If no value is passed, the storage object will use a URL based on\n *     the project ID of the base firebase.App instance.\n */\nexport class Reference {\n  protected location: Location;\n\n  constructor(protected authWrapper: AuthWrapper, location: string | Location) {\n    if (location instanceof Location) {\n      this.location = location;\n    } else {\n      this.location = Location.makeFromUrl(location);\n    }\n  }\n\n  /**\n   * @return The URL for the bucket and path this object references,\n   *     in the form gs://<bucket>/<object-path>\n   * @override\n   */\n  toString(): string {\n    validate('toString', [], arguments);\n    return 'gs://' + this.location.bucket + '/' + this.location.path;\n  }\n\n  protected newRef(authWrapper: AuthWrapper, location: Location): Reference {\n    return new Reference(authWrapper, location);\n  }\n\n  protected mappings(): metadata.Mappings {\n    return metadata.getMappings();\n  }\n\n  /**\n   * @return A reference to the object obtained by\n   *     appending childPath, removing any duplicate, beginning, or trailing\n   *     slashes.\n   */\n  child(childPath: string): Reference {\n    validate('child', [stringSpec()], arguments);\n    const newPath = path.child(this.location.path, childPath);\n    const location = new Location(this.location.bucket, newPath);\n    return this.newRef(this.authWrapper, location);\n  }\n\n  /**\n   * @return A reference to the parent of the\n   *     current object, or null if the current object is the root.\n   */\n  get parent(): Reference | null {\n    const newPath = path.parent(this.location.path);\n    if (newPath === null) {\n      return null;\n    }\n    const location = new Location(this.location.bucket, newPath);\n    return this.newRef(this.authWrapper, location);\n  }\n\n  /**\n   * @return An reference to the root of this\n   *     object's bucket.\n   */\n  get root(): Reference {\n    const location = new Location(this.location.bucket, '');\n    return this.newRef(this.authWrapper, location);\n  }\n\n  get bucket(): string {\n    return this.location.bucket;\n  }\n\n  get fullPath(): string {\n    return this.location.path;\n  }\n\n  get name(): string {\n    return path.lastComponent(this.location.path);\n  }\n\n  get storage(): Service {\n    return this.authWrapper.service();\n  }\n\n  /**\n   * Uploads a blob to this object's location.\n   * @param data The blob to upload.\n   * @return An UploadTask that lets you control and\n   *     observe the upload.\n   */\n  put(\n    data: Blob | Uint8Array | ArrayBuffer,\n    metadata: Metadata | null = null\n  ): UploadTask {\n    validate('put', [uploadDataSpec(), metadataSpec(true)], arguments);\n    this.throwIfRoot_('put');\n    return new UploadTask(\n      this,\n      this.authWrapper,\n      this.location,\n      this.mappings(),\n      new FbsBlob(data),\n      metadata\n    );\n  }\n\n  /**\n   * Uploads a string to this object's location.\n   * @param value The string to upload.\n   * @param format The format of the string to upload.\n   * @return An UploadTask that lets you control and\n   *     observe the upload.\n   */\n  putString(\n    value: string,\n    format: StringFormat = StringFormat.RAW,\n    metadata?: Metadata\n  ): UploadTask {\n    validate(\n      'putString',\n      [stringSpec(), stringSpec(formatValidator, true), metadataSpec(true)],\n      arguments\n    );\n    this.throwIfRoot_('putString');\n    const data = dataFromString(format, value);\n    const metadataClone = Object.assign({}, metadata);\n    if (\n      !type.isDef(metadataClone['contentType']) &&\n      type.isDef(data.contentType)\n    ) {\n      metadataClone['contentType'] = data.contentType!;\n    }\n    return new UploadTask(\n      this,\n      this.authWrapper,\n      this.location,\n      this.mappings(),\n      new FbsBlob(data.data, true),\n      metadataClone\n    );\n  }\n\n  /**\n   * Deletes the object at this location.\n   * @return A promise that resolves if the deletion succeeds.\n   */\n  delete(): Promise<void> {\n    validate('delete', [], arguments);\n    this.throwIfRoot_('delete');\n    return this.authWrapper.getAuthToken().then(authToken => {\n      const requestInfo = requests.deleteObject(\n        this.authWrapper,\n        this.location\n      );\n      return this.authWrapper.makeRequest(requestInfo, authToken).getPromise();\n    });\n  }\n\n  /**\n   * List all items (files) and prefixes (folders) under this storage reference.\n   *\n   * This is a helper method for calling list() repeatedly until there are\n   * no more results. The default pagination size is 1000.\n   *\n   * Note: The results may not be consistent if objects are changed while this\n   * operation is running.\n   *\n   * Warning: listAll may potentially consume too many resources if there are\n   * too many results.\n   *\n   * @return A Promise that resolves with all the items and prefixes under\n   *      the current storage reference. `prefixes` contains references to\n   *      sub-directories and `items` contains references to objects in this\n   *      folder. `nextPageToken` is never returned.\n   */\n  listAll(): Promise<ListResult> {\n    validate('listAll', [], arguments);\n    const accumulator = {\n      prefixes: [],\n      items: []\n    };\n    return this.listAllHelper(accumulator).then(() => accumulator);\n  }\n\n  private async listAllHelper(\n    accumulator: ListResult,\n    pageToken?: string\n  ): Promise<void> {\n    const opt: ListOptions = {\n      // maxResults is 1000 by default.\n      pageToken\n    };\n    const nextPage = await this.list(opt);\n    accumulator.prefixes.push(...nextPage.prefixes);\n    accumulator.items.push(...nextPage.items);\n    if (nextPage.nextPageToken != null) {\n      await this.listAllHelper(accumulator, nextPage.nextPageToken);\n    }\n  }\n\n  /**\n   * List items (files) and prefixes (folders) under this storage reference.\n   *\n   * List API is only available for Firebase Rules Version 2.\n   *\n   * GCS is a key-blob store. Firebase Storage imposes the semantic of '/'\n   * delimited folder structure.\n   * Refer to GCS's List API if you want to learn more.\n   *\n   * To adhere to Firebase Rules's Semantics, Firebase Storage does not\n   * support objects whose paths end with \"/\" or contain two consecutive\n   * \"/\"s. Firebase Storage List API will filter these unsupported objects.\n   * list() may fail if there are too many unsupported objects in the bucket.\n   *\n   * @param options See ListOptions for details.\n   * @return A Promise that resolves with the items and prefixes.\n   *      `prefixes` contains references to sub-folders and `items`\n   *      contains references to objects in this folder. `nextPageToken`\n   *      can be used to get the rest of the results.\n   */\n  list(options?: ListOptions | null): Promise<ListResult> {\n    validate('list', [listOptionSpec(true)], arguments);\n    const self = this;\n    return this.authWrapper.getAuthToken().then(authToken => {\n      const op = options || {};\n      const requestInfo = requests.list(\n        self.authWrapper,\n        self.location,\n        /*delimiter= */ '/',\n        op.pageToken,\n        op.maxResults\n      );\n      return self.authWrapper.makeRequest(requestInfo, authToken).getPromise();\n    });\n  }\n\n  /**\n   *     A promise that resolves with the metadata for this object. If this\n   *     object doesn't exist or metadata cannot be retreived, the promise is\n   *     rejected.\n   */\n  getMetadata(): Promise<Metadata> {\n    validate('getMetadata', [], arguments);\n    this.throwIfRoot_('getMetadata');\n    return this.authWrapper.getAuthToken().then(authToken => {\n      const requestInfo = requests.getMetadata(\n        this.authWrapper,\n        this.location,\n        this.mappings()\n      );\n      return this.authWrapper.makeRequest(requestInfo, authToken).getPromise();\n    });\n  }\n\n  /**\n   * Updates the metadata for this object.\n   * @param metadata The new metadata for the object.\n   *     Only values that have been explicitly set will be changed. Explicitly\n   *     setting a value to null will remove the metadata.\n   * @return A promise that resolves\n   *     with the new metadata for this object.\n   *     @see firebaseStorage.Reference.prototype.getMetadata\n   */\n  updateMetadata(metadata: Metadata): Promise<Metadata> {\n    validate('updateMetadata', [metadataSpec()], arguments);\n    this.throwIfRoot_('updateMetadata');\n    return this.authWrapper.getAuthToken().then(authToken => {\n      const requestInfo = requests.updateMetadata(\n        this.authWrapper,\n        this.location,\n        metadata,\n        this.mappings()\n      );\n      return this.authWrapper.makeRequest(requestInfo, authToken).getPromise();\n    });\n  }\n\n  /**\n   * @return A promise that resolves with the download\n   *     URL for this object.\n   */\n  getDownloadURL(): Promise<string> {\n    validate('getDownloadURL', [], arguments);\n    this.throwIfRoot_('getDownloadURL');\n    return this.authWrapper.getAuthToken().then(authToken => {\n      const requestInfo = requests.getDownloadUrl(\n        this.authWrapper,\n        this.location,\n        this.mappings()\n      );\n      return this.authWrapper\n        .makeRequest(requestInfo, authToken)\n        .getPromise()\n        .then(url => {\n          if (url === null) {\n            throw errorsExports.noDownloadURL();\n          }\n          return url;\n        });\n    });\n  }\n\n  private throwIfRoot_(name: string): void {\n    if (this.location.path === '') {\n      throw errorsExports.invalidRootOperation(name);\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { FirebaseStorageError } from './error';\nimport { Request } from './request';\n\n/**\n * A request whose promise always fails.\n * @struct\n * @template T\n */\nexport class FailRequest<T> implements Request<T> {\n  promise_: Promise<T>;\n\n  constructor(error: FirebaseStorageError) {\n    this.promise_ = Promise.reject<T>(error);\n  }\n\n  /** @inheritDoc */\n  getPromise(): Promise<T> {\n    return this.promise_;\n  }\n\n  /** @inheritDoc */\n  cancel(_appDelete = false): void {}\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { Request } from './request';\nimport * as constants from './constants';\n\nexport class RequestMap {\n  private readonly map: Map<number, Request<unknown>> = new Map();\n  private id: number;\n\n  constructor() {\n    this.id = constants.MIN_SAFE_INTEGER;\n  }\n\n  /**\n   * Registers the given request with this map.\n   * The request is unregistered when it completes.\n   *\n   * @param request The request to register.\n   */\n  addRequest(request: Request<unknown>): void {\n    const id = this.id;\n    this.id++;\n    this.map.set(id, request);\n\n    request\n      .getPromise()\n      .then(() => this.map.delete(id), () => this.map.delete(id));\n  }\n\n  /**\n   * Cancels all registered requests.\n   */\n  clear(): void {\n    this.map.forEach(v => {\n      v && v.cancel(true);\n    });\n    this.map.clear();\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport { Reference } from '../reference';\nimport { Service } from '../service';\nimport * as constants from './constants';\nimport * as errorsExports from './error';\nimport { FailRequest } from './failrequest';\nimport { Location } from './location';\nimport { Request } from './request';\nimport { RequestInfo } from './requestinfo';\nimport { requestMaker } from './requestmaker';\nimport { RequestMap } from './requestmap';\nimport * as type from './type';\nimport { XhrIoPool } from './xhriopool';\nimport { FirebaseApp, FirebaseOptions } from '@firebase/app-types';\nimport {\n  _FirebaseApp,\n  FirebaseAuthTokenData\n} from '@firebase/app-types/private';\n\n/**\n * @param app If null, getAuthToken always resolves with null.\n * @param service The storage service associated with this auth wrapper.\n *     Untyped to avoid circular type dependencies.\n * @struct\n */\nexport class AuthWrapper {\n  private app_: FirebaseApp | null;\n  private bucket_: string | null = null;\n\n  private storageRefMaker_: (p1: AuthWrapper, p2: Location) => Reference;\n  private requestMaker_: requestMaker;\n  private pool_: XhrIoPool;\n  private service_: Service;\n  private maxOperationRetryTime_: number;\n  private maxUploadRetryTime_: number;\n  private requestMap_: RequestMap;\n  private deleted_: boolean = false;\n\n  constructor(\n    app: FirebaseApp | null,\n    maker: (p1: AuthWrapper, p2: Location) => Reference,\n    requestMaker: requestMaker,\n    service: Service,\n    pool: XhrIoPool\n  ) {\n    this.app_ = app;\n    if (this.app_ !== null) {\n      const options = this.app_.options;\n      if (type.isDef(options)) {\n        this.bucket_ = AuthWrapper.extractBucket_(options);\n      }\n    }\n    this.storageRefMaker_ = maker;\n    this.requestMaker_ = requestMaker;\n    this.pool_ = pool;\n    this.service_ = service;\n    this.maxOperationRetryTime_ = constants.DEFAULT_MAX_OPERATION_RETRY_TIME;\n    this.maxUploadRetryTime_ = constants.DEFAULT_MAX_UPLOAD_RETRY_TIME;\n    this.requestMap_ = new RequestMap();\n  }\n\n  private static extractBucket_(config: FirebaseOptions): string | null {\n    const bucketString = config[constants.CONFIG_STORAGE_BUCKET_KEY] || null;\n    if (bucketString == null) {\n      return null;\n    }\n    const loc: Location = Location.makeFromBucketSpec(bucketString);\n    return loc.bucket;\n  }\n\n  getAuthToken(): Promise<string | null> {\n    // TODO(andysoto): remove ifDef checks after firebase-app implements stubs\n    // (b/28673818).\n    if (\n      this.app_ !== null &&\n      type.isDef((this.app_ as _FirebaseApp).INTERNAL) &&\n      type.isDef((this.app_ as _FirebaseApp).INTERNAL.getToken)\n    ) {\n      return (this.app_ as _FirebaseApp).INTERNAL.getToken().then(\n        (response: FirebaseAuthTokenData | null): string | null => {\n          if (response !== null) {\n            return response.accessToken;\n          } else {\n            return null;\n          }\n        },\n        () => null\n      );\n    } else {\n      return Promise.resolve(null);\n    }\n  }\n\n  bucket(): string | null {\n    if (this.deleted_) {\n      throw errorsExports.appDeleted();\n    } else {\n      return this.bucket_;\n    }\n  }\n\n  /**\n   * The service associated with this auth wrapper. Untyped to avoid circular\n   * type dependencies.\n   */\n  service(): Service {\n    return this.service_;\n  }\n\n  /**\n   * Returns a new firebaseStorage.Reference object referencing this AuthWrapper\n   * at the given Location.\n   * @param loc The Location.\n   * @return Actually a firebaseStorage.Reference, typing not allowed\n   *     because of circular dependency problems.\n   */\n  makeStorageReference(loc: Location): Reference {\n    return this.storageRefMaker_(this, loc);\n  }\n\n  makeRequest<T>(\n    requestInfo: RequestInfo<T>,\n    authToken: string | null\n  ): Request<T> {\n    if (!this.deleted_) {\n      const request = this.requestMaker_(requestInfo, authToken, this.pool_);\n      this.requestMap_.addRequest(request);\n      return request;\n    } else {\n      return new FailRequest(errorsExports.appDeleted());\n    }\n  }\n\n  /**\n   * Stop running requests and prevent more from being created.\n   */\n  deleteApp(): void {\n    this.deleted_ = true;\n    this.app_ = null;\n    this.requestMap_.clear();\n  }\n\n  maxUploadRetryTime(): number {\n    return this.maxUploadRetryTime_;\n  }\n\n  setMaxUploadRetryTime(time: number): void {\n    this.maxUploadRetryTime_ = time;\n  }\n\n  maxOperationRetryTime(): number {\n    return this.maxOperationRetryTime_;\n  }\n\n  setMaxOperationRetryTime(time: number): void {\n    this.maxOperationRetryTime_ = time;\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Defines methods used to actually send HTTP requests from\n * abstract representations.\n */\n\nimport firebase from '@firebase/app';\nimport * as backoff from './backoff';\nimport {\n  FirebaseStorageError,\n  unknown,\n  appDeleted,\n  canceled,\n  retryLimitExceeded\n} from './error';\nimport { RequestInfo } from './requestinfo';\nimport * as type from './type';\nimport * as UrlUtils from './url';\nimport { Headers, XhrIo, ErrorCode } from './xhrio';\nimport { XhrIoPool } from './xhriopool';\n\n/**\n * @template T\n */\nexport interface Request<T> {\n  getPromise(): Promise<T>;\n\n  /**\n   * Cancels the request. IMPORTANT: the promise may still be resolved with an\n   * appropriate value (if the request is finished before you call this method,\n   * but the promise has not yet been resolved), so don't just assume it will be\n   * rejected if you call this function.\n   * @param appDelete True if the cancelation came from the app being deleted.\n   */\n  cancel(appDelete?: boolean): void;\n}\n\n/**\n * @struct\n * @template T\n */\nclass NetworkRequest<T> implements Request<T> {\n  private url_: string;\n  private method_: string;\n  private headers_: Headers;\n  private body_: string | Blob | Uint8Array | null;\n  private successCodes_: number[];\n  private additionalRetryCodes_: number[];\n  private pendingXhr_: XhrIo | null = null;\n  private backoffId_: backoff.id | null = null;\n  private resolve_: Function | null = null;\n  private reject_: Function | null = null;\n  private canceled_: boolean = false;\n  private appDelete_: boolean = false;\n  private callback_: (p1: XhrIo, p2: string) => T;\n  private errorCallback_:\n    | ((p1: XhrIo, p2: FirebaseStorageError) => FirebaseStorageError)\n    | null;\n  private progressCallback_: ((p1: number, p2: number) => void) | null;\n  private timeout_: number;\n  private pool_: XhrIoPool;\n  promise_: Promise<T>;\n\n  constructor(\n    url: string,\n    method: string,\n    headers: Headers,\n    body: string | Blob | Uint8Array | null,\n    successCodes: number[],\n    additionalRetryCodes: number[],\n    callback: (p1: XhrIo, p2: string) => T,\n    errorCallback:\n      | ((p1: XhrIo, p2: FirebaseStorageError) => FirebaseStorageError)\n      | null,\n    timeout: number,\n    progressCallback: ((p1: number, p2: number) => void) | null,\n    pool: XhrIoPool\n  ) {\n    this.url_ = url;\n    this.method_ = method;\n    this.headers_ = headers;\n    this.body_ = body;\n    this.successCodes_ = successCodes.slice();\n    this.additionalRetryCodes_ = additionalRetryCodes.slice();\n    this.callback_ = callback;\n    this.errorCallback_ = errorCallback;\n    this.progressCallback_ = progressCallback;\n    this.timeout_ = timeout;\n    this.pool_ = pool;\n    this.promise_ = new Promise((resolve, reject) => {\n      this.resolve_ = resolve;\n      this.reject_ = reject;\n      this.start_();\n    });\n  }\n\n  /**\n   * Actually starts the retry loop.\n   */\n  private start_(): void {\n    const self = this;\n\n    function doTheRequest(\n      backoffCallback: (p1: boolean, ...p2: unknown[]) => void,\n      canceled: boolean\n    ): void {\n      if (canceled) {\n        backoffCallback(false, new RequestEndStatus(false, null, true));\n        return;\n      }\n      const xhr = self.pool_.createXhrIo();\n      self.pendingXhr_ = xhr;\n\n      function progressListener(progressEvent: ProgressEvent): void {\n        const loaded = progressEvent.loaded;\n        const total = progressEvent.lengthComputable ? progressEvent.total : -1;\n        if (self.progressCallback_ !== null) {\n          self.progressCallback_(loaded, total);\n        }\n      }\n      if (self.progressCallback_ !== null) {\n        xhr.addUploadProgressListener(progressListener);\n      }\n\n      // eslint-disable-next-line @typescript-eslint/no-floating-promises\n      xhr\n        .send(self.url_, self.method_, self.body_, self.headers_)\n        .then((xhr: XhrIo) => {\n          if (self.progressCallback_ !== null) {\n            xhr.removeUploadProgressListener(progressListener);\n          }\n          self.pendingXhr_ = null;\n          xhr = xhr as XhrIo;\n          const hitServer = xhr.getErrorCode() === ErrorCode.NO_ERROR;\n          const status = xhr.getStatus();\n          if (!hitServer || self.isRetryStatusCode_(status)) {\n            const wasCanceled = xhr.getErrorCode() === ErrorCode.ABORT;\n            backoffCallback(\n              false,\n              new RequestEndStatus(false, null, wasCanceled)\n            );\n            return;\n          }\n          const successCode = self.successCodes_.indexOf(status) !== -1;\n          backoffCallback(true, new RequestEndStatus(successCode, xhr));\n        });\n    }\n\n    /**\n     * @param requestWentThrough True if the request eventually went\n     *     through, false if it hit the retry limit or was canceled.\n     */\n    function backoffDone(\n      requestWentThrough: boolean,\n      status: RequestEndStatus\n    ): void {\n      const resolve = self.resolve_ as Function;\n      const reject = self.reject_ as Function;\n      const xhr = status.xhr as XhrIo;\n      if (status.wasSuccessCode) {\n        try {\n          const result = self.callback_(xhr, xhr.getResponseText());\n          if (type.isJustDef(result)) {\n            resolve(result);\n          } else {\n            resolve();\n          }\n        } catch (e) {\n          reject(e);\n        }\n      } else {\n        if (xhr !== null) {\n          const err = unknown();\n          err.setServerResponseProp(xhr.getResponseText());\n          if (self.errorCallback_) {\n            reject(self.errorCallback_(xhr, err));\n          } else {\n            reject(err);\n          }\n        } else {\n          if (status.canceled) {\n            const err = self.appDelete_ ? appDeleted() : canceled();\n            reject(err);\n          } else {\n            const err = retryLimitExceeded();\n            reject(err);\n          }\n        }\n      }\n    }\n    if (this.canceled_) {\n      backoffDone(false, new RequestEndStatus(false, null, true));\n    } else {\n      this.backoffId_ = backoff.start(doTheRequest, backoffDone, this.timeout_);\n    }\n  }\n\n  /** @inheritDoc */\n  getPromise(): Promise<T> {\n    return this.promise_;\n  }\n\n  /** @inheritDoc */\n  cancel(appDelete?: boolean): void {\n    this.canceled_ = true;\n    this.appDelete_ = appDelete || false;\n    if (this.backoffId_ !== null) {\n      backoff.stop(this.backoffId_);\n    }\n    if (this.pendingXhr_ !== null) {\n      this.pendingXhr_.abort();\n    }\n  }\n\n  private isRetryStatusCode_(status: number): boolean {\n    // The codes for which to retry came from this page:\n    // https://cloud.google.com/storage/docs/exponential-backoff\n    const isFiveHundredCode = status >= 500 && status < 600;\n    const extraRetryCodes = [\n      // Request Timeout: web server didn't receive full request in time.\n      408,\n      // Too Many Requests: you're getting rate-limited, basically.\n      429\n    ];\n    const isExtraRetryCode = extraRetryCodes.indexOf(status) !== -1;\n    const isRequestSpecificRetryCode =\n      this.additionalRetryCodes_.indexOf(status) !== -1;\n    return isFiveHundredCode || isExtraRetryCode || isRequestSpecificRetryCode;\n  }\n}\n\n/**\n * A collection of information about the result of a network request.\n * @param opt_canceled Defaults to false.\n * @struct\n */\nexport class RequestEndStatus {\n  /**\n   * True if the request was canceled.\n   */\n  canceled: boolean;\n\n  constructor(\n    public wasSuccessCode: boolean,\n    public xhr: XhrIo | null,\n    canceled?: boolean\n  ) {\n    this.canceled = !!canceled;\n  }\n}\n\nexport function addAuthHeader_(\n  headers: Headers,\n  authToken: string | null\n): void {\n  if (authToken !== null && authToken.length > 0) {\n    headers['Authorization'] = 'Firebase ' + authToken;\n  }\n}\n\nexport function addVersionHeader_(headers: Headers): void {\n  const version =\n    typeof firebase !== 'undefined' ? firebase.SDK_VERSION : 'AppManager';\n  headers['X-Firebase-Storage-Version'] = 'webjs/' + version;\n}\n\n/**\n * @template T\n */\nexport function makeRequest<T>(\n  requestInfo: RequestInfo<T>,\n  authToken: string | null,\n  pool: XhrIoPool\n): Request<T> {\n  const queryPart = UrlUtils.makeQueryString(requestInfo.urlParams);\n  const url = requestInfo.url + queryPart;\n  const headers = Object.assign({}, requestInfo.headers);\n  addAuthHeader_(headers, authToken);\n  addVersionHeader_(headers);\n  return new NetworkRequest<T>(\n    url,\n    requestInfo.method,\n    headers,\n    requestInfo.body,\n    requestInfo.successCodes,\n    requestInfo.additionalRetryCodes,\n    requestInfo.handler,\n    requestInfo.errorHandler,\n    requestInfo.timeout,\n    requestInfo.progressCallback,\n    pool\n  );\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * @fileoverview Provides a method for running a function with exponential\n * backoff.\n */\ntype id = (p1: boolean) => void;\n\nexport { id };\n\n/**\n * @param f May be invoked\n *     before the function returns.\n * @param callback Get all the arguments passed to the function\n *     passed to f, including the initial boolean.\n */\nexport function start(\n  f: (p1: (success: boolean) => void, canceled: boolean) => void,\n  callback: Function,\n  timeout: number\n): id {\n  // TODO(andysoto): make this code cleaner (probably refactor into an actual\n  // type instead of a bunch of functions with state shared in the closure)\n  let waitSeconds = 1;\n  // Would type this as \"number\" but that doesn't work for Node so ¯\\_(ツ)_/¯\n  // TODO: find a way to exclude Node type definition for storage because storage only works in browser\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any\n  let timeoutId: any = null;\n  let hitTimeout = false;\n  let cancelState = 0;\n\n  function canceled(): boolean {\n    return cancelState === 2;\n  }\n  let triggeredCallback = false;\n\n  // TODO: This disable can be removed and the 'ignoreRestArgs' option added to\n  // the no-explicit-any rule when ESlint releases it.\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any\n  function triggerCallback(...args: any[]): void {\n    if (!triggeredCallback) {\n      triggeredCallback = true;\n      callback.apply(null, args);\n    }\n  }\n\n  function callWithDelay(millis: number): void {\n    timeoutId = setTimeout(() => {\n      timeoutId = null;\n      f(handler, canceled());\n    }, millis);\n  }\n\n  // TODO: This disable can be removed and the 'ignoreRestArgs' option added to\n  // the no-explicit-any rule when ESlint releases it.\n  // eslint-disable-next-line @typescript-eslint/no-explicit-any\n  function handler(success: boolean, ...args: any[]): void {\n    if (triggeredCallback) {\n      return;\n    }\n    if (success) {\n      triggerCallback.call(null, success, ...args);\n      return;\n    }\n    const mustStop = canceled() || hitTimeout;\n    if (mustStop) {\n      triggerCallback.call(null, success, ...args);\n      return;\n    }\n    if (waitSeconds < 64) {\n      /* TODO(andysoto): don't back off so quickly if we know we're offline. */\n      waitSeconds *= 2;\n    }\n    let waitMillis;\n    if (cancelState === 1) {\n      cancelState = 2;\n      waitMillis = 0;\n    } else {\n      waitMillis = (waitSeconds + Math.random()) * 1000;\n    }\n    callWithDelay(waitMillis);\n  }\n  let stopped = false;\n\n  function stop(wasTimeout: boolean): void {\n    if (stopped) {\n      return;\n    }\n    stopped = true;\n    if (triggeredCallback) {\n      return;\n    }\n    if (timeoutId !== null) {\n      if (!wasTimeout) {\n        cancelState = 2;\n      }\n      clearTimeout(timeoutId);\n      callWithDelay(0);\n    } else {\n      if (!wasTimeout) {\n        cancelState = 1;\n      }\n    }\n  }\n  callWithDelay(0);\n  setTimeout(() => {\n    hitTimeout = true;\n    stop(true);\n  }, timeout);\n  return stop;\n}\n\n/**\n * Stops the retry loop from repeating.\n * If the function is currently \"in between\" retries, it is invoked immediately\n * with the second parameter as \"true\". Otherwise, it will be invoked once more\n * after the current invocation finishes iff the current invocation would have\n * triggered another retry.\n */\nexport function stop(id: id): void {\n  id(false);\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport * as args from './implementation/args';\nimport { AuthWrapper } from './implementation/authwrapper';\nimport { Location } from './implementation/location';\nimport * as RequestExports from './implementation/request';\nimport { XhrIoPool } from './implementation/xhriopool';\nimport { Reference } from './reference';\n\n/**\n * A service that provides firebaseStorage.Reference instances.\n * @param opt_url gs:// url to a custom Storage Bucket\n *\n * @struct\n */\nexport class Service {\n  authWrapper_: AuthWrapper;\n  private app_: FirebaseApp;\n  private bucket_: Location | null = null;\n  private internals_: ServiceInternals;\n\n  constructor(app: FirebaseApp, pool: XhrIoPool, url?: string) {\n    function maker(authWrapper: AuthWrapper, loc: Location): Reference {\n      return new Reference(authWrapper, loc);\n    }\n    this.authWrapper_ = new AuthWrapper(\n      app,\n      maker,\n      RequestExports.makeRequest,\n      this,\n      pool\n    );\n    this.app_ = app;\n    if (url != null) {\n      this.bucket_ = Location.makeFromBucketSpec(url);\n    } else {\n      const authWrapperBucket = this.authWrapper_.bucket();\n      if (authWrapperBucket != null) {\n        this.bucket_ = new Location(authWrapperBucket, '');\n      }\n    }\n    this.internals_ = new ServiceInternals(this);\n  }\n\n  /**\n   * Returns a firebaseStorage.Reference for the given path in the default\n   * bucket.\n   */\n  ref(path?: string): Reference {\n    function validator(path: unknown): void {\n      if (typeof path !== 'string') {\n        throw 'Path is not a string.';\n      }\n      if (/^[A-Za-z]+:\\/\\//.test(path as string)) {\n        throw 'Expected child path but got a URL, use refFromURL instead.';\n      }\n    }\n    args.validate('ref', [args.stringSpec(validator, true)], arguments);\n    if (this.bucket_ == null) {\n      throw new Error('No Storage Bucket defined in Firebase Options.');\n    }\n\n    const ref = new Reference(this.authWrapper_, this.bucket_);\n    if (path != null) {\n      return ref.child(path);\n    } else {\n      return ref;\n    }\n  }\n\n  /**\n   * Returns a firebaseStorage.Reference object for the given absolute URL,\n   * which must be a gs:// or http[s]:// URL.\n   */\n  refFromURL(url: string): Reference {\n    function validator(p: unknown): void {\n      if (typeof p !== 'string') {\n        throw 'Path is not a string.';\n      }\n      if (!/^[A-Za-z]+:\\/\\//.test(p as string)) {\n        throw 'Expected full URL but got a child path, use ref instead.';\n      }\n      try {\n        Location.makeFromUrl(p as string);\n      } catch (e) {\n        throw 'Expected valid full URL but got an invalid one.';\n      }\n    }\n    args.validate('refFromURL', [args.stringSpec(validator, false)], arguments);\n    return new Reference(this.authWrapper_, url);\n  }\n\n  get maxUploadRetryTime(): number {\n    return this.authWrapper_.maxUploadRetryTime();\n  }\n\n  setMaxUploadRetryTime(time: number): void {\n    args.validate(\n      'setMaxUploadRetryTime',\n      [args.nonNegativeNumberSpec()],\n      arguments\n    );\n    this.authWrapper_.setMaxUploadRetryTime(time);\n  }\n\n  setMaxOperationRetryTime(time: number): void {\n    args.validate(\n      'setMaxOperationRetryTime',\n      [args.nonNegativeNumberSpec()],\n      arguments\n    );\n    this.authWrapper_.setMaxOperationRetryTime(time);\n  }\n\n  get app(): FirebaseApp {\n    return this.app_;\n  }\n\n  get INTERNAL(): ServiceInternals {\n    return this.internals_;\n  }\n}\n\n/**\n * @struct\n */\nexport class ServiceInternals {\n  service_: Service;\n\n  constructor(service: Service) {\n    this.service_ = service;\n  }\n\n  /**\n   * Called when the associated app is deleted.\n   * @see {!fbs.AuthWrapper.prototype.deleteApp}\n   */\n  delete(): Promise<void> {\n    this.service_.authWrapper_.deleteApp();\n    return Promise.resolve();\n  }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport { FirebaseApp } from '@firebase/app-types';\nimport {\n  FirebaseServiceFactory,\n  _FirebaseNamespace\n} from '@firebase/app-types/private';\nimport { StringFormat } from './src/implementation/string';\nimport { TaskEvent, TaskState } from './src/implementation/taskenums';\n\nimport { XhrIoPool } from './src/implementation/xhriopool';\nimport { Reference } from './src/reference';\nimport { Service } from './src/service';\nimport * as types from '@firebase/storage-types';\n\n/**\n * Type constant for Firebase Storage.\n */\nconst STORAGE_TYPE = 'storage';\n\nfunction factory(\n  app: FirebaseApp,\n  unused: unknown,\n  url?: string\n): types.FirebaseStorage {\n  return (new Service(\n    app,\n    new XhrIoPool(),\n    url\n  ) as unknown) as types.FirebaseStorage;\n}\n\nexport function registerStorage(instance: _FirebaseNamespace): void {\n  const namespaceExports = {\n    // no-inline\n    TaskState,\n    TaskEvent,\n    StringFormat,\n    Storage: Service,\n    Reference\n  };\n  instance.INTERNAL.registerService(\n    STORAGE_TYPE,\n    factory as FirebaseServiceFactory,\n    namespaceExports,\n    undefined,\n    // Allow multiple storage instances per app.\n    true\n  );\n}\n\nregisterStorage(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior for `registerStorage`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    storage?: {\n      (app?: FirebaseApp): types.FirebaseStorage;\n      Storage: typeof types.FirebaseStorage;\n\n      StringFormat: {\n        BASE64: types.StringFormat;\n        BASE64URL: types.StringFormat;\n        DATA_URL: types.StringFormat;\n        RAW: types.StringFormat;\n      };\n      TaskEvent: {\n        STATE_CHANGED: types.TaskEvent;\n      };\n      TaskState: {\n        CANCELED: types.TaskState;\n        ERROR: types.TaskState;\n        PAUSED: types.TaskState;\n        RUNNING: types.TaskState;\n        SUCCESS: types.TaskState;\n      };\n    };\n  }\n  interface FirebaseApp {\n    storage?(storageBucket?: string): types.FirebaseStorage;\n  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