node_modules/@angular/common/bundles/common-http.umd.js.map

{"version":3,"file":"common-http.umd.js","sources":["../../../../../packages/common/http/src/backend.ts","../../../../../external/npm/node_modules/tslib/tslib.es6.js","../../../../../packages/common/http/src/headers.ts","../../../../../packages/common/http/src/params.ts","../../../../../packages/common/http/src/request.ts","../../../../../packages/common/http/src/response.ts","../../../../../packages/common/http/src/client.ts","../../../../../packages/common/http/src/interceptor.ts","../../../../../packages/common/http/src/jsonp.ts","../../../../../packages/common/http/src/xhr.ts","../../../../../packages/common/http/src/xsrf.ts","../../../../../packages/common/http/src/module.ts","../../../../../packages/common/http/public_api.ts","../../../../../packages/common/http/index.ts","../../../../../packages/common/http/http.ts"],"sourcesContent":["/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Observable} from 'rxjs';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\n/**\n * Transforms an `HttpRequest` into a stream of `HttpEvent`s, one of which will likely be a\n * `HttpResponse`.\n *\n * `HttpHandler` is injectable. When injected, the handler instance dispatches requests to the\n * first interceptor in the chain, which dispatches to the second, etc, eventually reaching the\n * `HttpBackend`.\n *\n * In an `HttpInterceptor`, the `HttpHandler` parameter is the next interceptor in the chain.\n *\n * @publicApi\n */\nexport abstract class HttpHandler {\n  abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;\n}\n\n/**\n * A final `HttpHandler` which will dispatch the request via browser HTTP APIs to a backend.\n *\n * Interceptors sit between the `HttpClient` interface and the `HttpBackend`.\n *\n * When injected, `HttpBackend` dispatches requests directly to the backend, without going\n * through the interceptor chain.\n *\n * @publicApi\n */\nexport abstract class HttpBackend implements HttpHandler {\n  abstract handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;\n}\n","/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation.\r\n\r\nPermission to use, copy, modify, and/or distribute this software for any\r\npurpose with or without fee is hereby granted.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH\r\nREGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY\r\nAND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,\r\nINDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM\r\nLOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR\r\nOTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR\r\nPERFORMANCE OF THIS SOFTWARE.\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 ? 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(function(o, v) {\r\n    Object.defineProperty(o, \"default\", { enumerable: true, value: v });\r\n}) : function(o, v) {\r\n    o[\"default\"] = v;\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)) __createBinding(result, mod, k);\r\n    __setModuleDefault(result, 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\r\nexport function __classPrivateFieldGet(receiver, privateMap) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to get private field on non-instance\");\r\n    }\r\n    return privateMap.get(receiver);\r\n}\r\n\r\nexport function __classPrivateFieldSet(receiver, privateMap, value) {\r\n    if (!privateMap.has(receiver)) {\r\n        throw new TypeError(\"attempted to set private field on non-instance\");\r\n    }\r\n    privateMap.set(receiver, value);\r\n    return value;\r\n}\r\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\ninterface Update {\n  name: string;\n  value?: string|string[];\n  op: 'a'|'s'|'d';\n}\n\n/**\n * Represents the header configuration options for an HTTP request.\n * Instances are immutable. Modifying methods return a cloned\n * instance with the change. The original object is never changed.\n *\n * @publicApi\n */\nexport class HttpHeaders {\n  /**\n   * Internal map of lowercase header names to values.\n   */\n  // TODO(issue/24571): remove '!'.\n  private headers!: Map<string, string[]>;\n\n\n  /**\n   * Internal map of lowercased header names to the normalized\n   * form of the name (the form seen first).\n   */\n  private normalizedNames: Map<string, string> = new Map();\n\n  /**\n   * Complete the lazy initialization of this object (needed before reading).\n   */\n  private lazyInit!: HttpHeaders|Function|null;\n\n  /**\n   * Queued updates to be materialized the next initialization.\n   */\n  private lazyUpdate: Update[]|null = null;\n\n  /**  Constructs a new HTTP header object with the given values.*/\n\n  constructor(headers?: string|{[name: string]: string | string[]}) {\n    if (!headers) {\n      this.headers = new Map<string, string[]>();\n    } else if (typeof headers === 'string') {\n      this.lazyInit = () => {\n        this.headers = new Map<string, string[]>();\n        headers.split('\\n').forEach(line => {\n          const index = line.indexOf(':');\n          if (index > 0) {\n            const name = line.slice(0, index);\n            const key = name.toLowerCase();\n            const value = line.slice(index + 1).trim();\n            this.maybeSetNormalizedName(name, key);\n            if (this.headers.has(key)) {\n              this.headers.get(key)!.push(value);\n            } else {\n              this.headers.set(key, [value]);\n            }\n          }\n        });\n      };\n    } else {\n      this.lazyInit = () => {\n        this.headers = new Map<string, string[]>();\n        Object.keys(headers).forEach(name => {\n          let values: string|string[] = headers[name];\n          const key = name.toLowerCase();\n          if (typeof values === 'string') {\n            values = [values];\n          }\n          if (values.length > 0) {\n            this.headers.set(key, values);\n            this.maybeSetNormalizedName(name, key);\n          }\n        });\n      };\n    }\n  }\n\n  /**\n   * Checks for existence of a given header.\n   *\n   * @param name The header name to check for existence.\n   *\n   * @returns True if the header exists, false otherwise.\n   */\n  has(name: string): boolean {\n    this.init();\n\n    return this.headers.has(name.toLowerCase());\n  }\n\n  /**\n   * Retrieves the first value of a given header.\n   *\n   * @param name The header name.\n   *\n   * @returns The value string if the header exists, null otherwise\n   */\n  get(name: string): string|null {\n    this.init();\n\n    const values = this.headers.get(name.toLowerCase());\n    return values && values.length > 0 ? values[0] : null;\n  }\n\n  /**\n   * Retrieves the names of the headers.\n   *\n   * @returns A list of header names.\n   */\n  keys(): string[] {\n    this.init();\n\n    return Array.from(this.normalizedNames.values());\n  }\n\n  /**\n   * Retrieves a list of values for a given header.\n   *\n   * @param name The header name from which to retrieve values.\n   *\n   * @returns A string of values if the header exists, null otherwise.\n   */\n  getAll(name: string): string[]|null {\n    this.init();\n\n    return this.headers.get(name.toLowerCase()) || null;\n  }\n\n  /**\n   * Appends a new value to the existing set of values for a header\n   * and returns them in a clone of the original instance.\n   *\n   * @param name The header name for which to append the values.\n   * @param value The value to append.\n   *\n   * @returns A clone of the HTTP headers object with the value appended to the given header.\n   */\n\n  append(name: string, value: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 'a'});\n  }\n  /**\n   * Sets or modifies a value for a given header in a clone of the original instance.\n   * If the header already exists, its value is replaced with the given value\n   * in the returned object.\n   *\n   * @param name The header name.\n   * @param value The value or values to set or overide for the given header.\n   *\n   * @returns A clone of the HTTP headers object with the newly set header value.\n   */\n  set(name: string, value: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 's'});\n  }\n  /**\n   * Deletes values for a given header in a clone of the original instance.\n   *\n   * @param name The header name.\n   * @param value The value or values to delete for the given header.\n   *\n   * @returns A clone of the HTTP headers object with the given value deleted.\n   */\n  delete(name: string, value?: string|string[]): HttpHeaders {\n    return this.clone({name, value, op: 'd'});\n  }\n\n  private maybeSetNormalizedName(name: string, lcName: string): void {\n    if (!this.normalizedNames.has(lcName)) {\n      this.normalizedNames.set(lcName, name);\n    }\n  }\n\n  private init(): void {\n    if (!!this.lazyInit) {\n      if (this.lazyInit instanceof HttpHeaders) {\n        this.copyFrom(this.lazyInit);\n      } else {\n        this.lazyInit();\n      }\n      this.lazyInit = null;\n      if (!!this.lazyUpdate) {\n        this.lazyUpdate.forEach(update => this.applyUpdate(update));\n        this.lazyUpdate = null;\n      }\n    }\n  }\n\n  private copyFrom(other: HttpHeaders) {\n    other.init();\n    Array.from(other.headers.keys()).forEach(key => {\n      this.headers.set(key, other.headers.get(key)!);\n      this.normalizedNames.set(key, other.normalizedNames.get(key)!);\n    });\n  }\n\n  private clone(update: Update): HttpHeaders {\n    const clone = new HttpHeaders();\n    clone.lazyInit =\n        (!!this.lazyInit && this.lazyInit instanceof HttpHeaders) ? this.lazyInit : this;\n    clone.lazyUpdate = (this.lazyUpdate || []).concat([update]);\n    return clone;\n  }\n\n  private applyUpdate(update: Update): void {\n    const key = update.name.toLowerCase();\n    switch (update.op) {\n      case 'a':\n      case 's':\n        let value = update.value!;\n        if (typeof value === 'string') {\n          value = [value];\n        }\n        if (value.length === 0) {\n          return;\n        }\n        this.maybeSetNormalizedName(update.name, key);\n        const base = (update.op === 'a' ? this.headers.get(key) : undefined) || [];\n        base.push(...value);\n        this.headers.set(key, base);\n        break;\n      case 'd':\n        const toDelete = update.value as string | undefined;\n        if (!toDelete) {\n          this.headers.delete(key);\n          this.normalizedNames.delete(key);\n        } else {\n          let existing = this.headers.get(key);\n          if (!existing) {\n            return;\n          }\n          existing = existing.filter(value => toDelete.indexOf(value) === -1);\n          if (existing.length === 0) {\n            this.headers.delete(key);\n            this.normalizedNames.delete(key);\n          } else {\n            this.headers.set(key, existing);\n          }\n        }\n        break;\n    }\n  }\n\n  /**\n   * @internal\n   */\n  forEach(fn: (name: string, values: string[]) => void) {\n    this.init();\n    Array.from(this.normalizedNames.keys())\n        .forEach(key => fn(this.normalizedNames.get(key)!, this.headers.get(key)!));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n/**\n * A codec for encoding and decoding parameters in URLs.\n *\n * Used by `HttpParams`.\n *\n * @publicApi\n **/\nexport interface HttpParameterCodec {\n  encodeKey(key: string): string;\n  encodeValue(value: string): string;\n\n  decodeKey(key: string): string;\n  decodeValue(value: string): string;\n}\n\n/**\n * Provides encoding and decoding of URL parameter and query-string values.\n *\n * Serializes and parses URL parameter keys and values to encode and decode them.\n * If you pass URL query parameters without encoding,\n * the query parameters can be misinterpreted at the receiving end.\n *\n *\n * @publicApi\n */\nexport class HttpUrlEncodingCodec implements HttpParameterCodec {\n  /**\n   * Encodes a key name for a URL parameter or query-string.\n   * @param key The key name.\n   * @returns The encoded key name.\n   */\n  encodeKey(key: string): string {\n    return standardEncoding(key);\n  }\n\n  /**\n   * Encodes the value of a URL parameter or query-string.\n   * @param value The value.\n   * @returns The encoded value.\n   */\n  encodeValue(value: string): string {\n    return standardEncoding(value);\n  }\n\n  /**\n   * Decodes an encoded URL parameter or query-string key.\n   * @param key The encoded key name.\n   * @returns The decoded key name.\n   */\n  decodeKey(key: string): string {\n    return decodeURIComponent(key);\n  }\n\n  /**\n   * Decodes an encoded URL parameter or query-string value.\n   * @param value The encoded value.\n   * @returns The decoded value.\n   */\n  decodeValue(value: string) {\n    return decodeURIComponent(value);\n  }\n}\n\n\nfunction paramParser(rawParams: string, codec: HttpParameterCodec): Map<string, string[]> {\n  const map = new Map<string, string[]>();\n  if (rawParams.length > 0) {\n    // The `window.location.search` can be used while creating an instance of the `HttpParams` class\n    // (e.g. `new HttpParams({ fromString: window.location.search })`). The `window.location.search`\n    // may start with the `?` char, so we strip it if it's present.\n    const params: string[] = rawParams.replace(/^\\?/, '').split('&');\n    params.forEach((param: string) => {\n      const eqIdx = param.indexOf('=');\n      const [key, val]: string[] = eqIdx == -1 ?\n          [codec.decodeKey(param), ''] :\n          [codec.decodeKey(param.slice(0, eqIdx)), codec.decodeValue(param.slice(eqIdx + 1))];\n      const list = map.get(key) || [];\n      list.push(val);\n      map.set(key, list);\n    });\n  }\n  return map;\n}\nfunction standardEncoding(v: string): string {\n  return encodeURIComponent(v)\n      .replace(/%40/gi, '@')\n      .replace(/%3A/gi, ':')\n      .replace(/%24/gi, '$')\n      .replace(/%2C/gi, ',')\n      .replace(/%3B/gi, ';')\n      .replace(/%2B/gi, '+')\n      .replace(/%3D/gi, '=')\n      .replace(/%3F/gi, '?')\n      .replace(/%2F/gi, '/');\n}\n\ninterface Update {\n  param: string;\n  value?: string;\n  op: 'a'|'d'|'s';\n}\n\n/**\n * Options used to construct an `HttpParams` instance.\n *\n * @publicApi\n */\nexport interface HttpParamsOptions {\n  /**\n   * String representation of the HTTP parameters in URL-query-string format.\n   * Mutually exclusive with `fromObject`.\n   */\n  fromString?: string;\n\n  /** Object map of the HTTP parameters. Mutually exclusive with `fromString`. */\n  fromObject?: {[param: string]: string|ReadonlyArray<string>};\n\n  /** Encoding codec used to parse and serialize the parameters. */\n  encoder?: HttpParameterCodec;\n}\n\n/**\n * An HTTP request/response body that represents serialized parameters,\n * per the MIME type `application/x-www-form-urlencoded`.\n *\n * This class is immutable; all mutation operations return a new instance.\n *\n * @publicApi\n */\nexport class HttpParams {\n  private map: Map<string, string[]>|null;\n  private encoder: HttpParameterCodec;\n  private updates: Update[]|null = null;\n  private cloneFrom: HttpParams|null = null;\n\n  constructor(options: HttpParamsOptions = {} as HttpParamsOptions) {\n    this.encoder = options.encoder || new HttpUrlEncodingCodec();\n    if (!!options.fromString) {\n      if (!!options.fromObject) {\n        throw new Error(`Cannot specify both fromString and fromObject.`);\n      }\n      this.map = paramParser(options.fromString, this.encoder);\n    } else if (!!options.fromObject) {\n      this.map = new Map<string, string[]>();\n      Object.keys(options.fromObject).forEach(key => {\n        const value = (options.fromObject as any)[key];\n        this.map!.set(key, Array.isArray(value) ? value : [value]);\n      });\n    } else {\n      this.map = null;\n    }\n  }\n\n  /**\n   * Reports whether the body includes one or more values for a given parameter.\n   * @param param The parameter name.\n   * @returns True if the parameter has one or more values,\n   * false if it has no value or is not present.\n   */\n  has(param: string): boolean {\n    this.init();\n    return this.map!.has(param);\n  }\n\n  /**\n   * Retrieves the first value for a parameter.\n   * @param param The parameter name.\n   * @returns The first value of the given parameter,\n   * or `null` if the parameter is not present.\n   */\n  get(param: string): string|null {\n    this.init();\n    const res = this.map!.get(param);\n    return !!res ? res[0] : null;\n  }\n\n  /**\n   * Retrieves all values for a  parameter.\n   * @param param The parameter name.\n   * @returns All values in a string array,\n   * or `null` if the parameter not present.\n   */\n  getAll(param: string): string[]|null {\n    this.init();\n    return this.map!.get(param) || null;\n  }\n\n  /**\n   * Retrieves all the parameters for this body.\n   * @returns The parameter names in a string array.\n   */\n  keys(): string[] {\n    this.init();\n    return Array.from(this.map!.keys());\n  }\n\n  /**\n   * Appends a new value to existing values for a parameter.\n   * @param param The parameter name.\n   * @param value The new value to add.\n   * @return A new body with the appended value.\n   */\n  append(param: string, value: string): HttpParams {\n    return this.clone({param, value, op: 'a'});\n  }\n\n  /**\n   * Constructs a new body with appended values for the given parameter name.\n   * @param params parameters and values\n   * @return A new body with the new value.\n   */\n  appendAll(params: {[param: string]: string|string[]}): HttpParams {\n    const updates: Update[] = [];\n    Object.keys(params).forEach(param => {\n      const value = params[param];\n      if (Array.isArray(value)) {\n        value.forEach(_value => {\n          updates.push({param, value: _value, op: 'a'});\n        });\n      } else {\n        updates.push({param, value, op: 'a'});\n      }\n    });\n    return this.clone(updates);\n  }\n\n  /**\n   * Replaces the value for a parameter.\n   * @param param The parameter name.\n   * @param value The new value.\n   * @return A new body with the new value.\n   */\n  set(param: string, value: string): HttpParams {\n    return this.clone({param, value, op: 's'});\n  }\n\n  /**\n   * Removes a given value or all values from a parameter.\n   * @param param The parameter name.\n   * @param value The value to remove, if provided.\n   * @return A new body with the given value removed, or with all values\n   * removed if no value is specified.\n   */\n  delete(param: string, value?: string): HttpParams {\n    return this.clone({param, value, op: 'd'});\n  }\n\n  /**\n   * Serializes the body to an encoded string, where key-value pairs (separated by `=`) are\n   * separated by `&`s.\n   */\n  toString(): string {\n    this.init();\n    return this.keys()\n        .map(key => {\n          const eKey = this.encoder.encodeKey(key);\n          // `a: ['1']` produces `'a=1'`\n          // `b: []` produces `''`\n          // `c: ['1', '2']` produces `'c=1&c=2'`\n          return this.map!.get(key)!.map(value => eKey + '=' + this.encoder.encodeValue(value))\n              .join('&');\n        })\n        // filter out empty values because `b: []` produces `''`\n        // which results in `a=1&&c=1&c=2` instead of `a=1&c=1&c=2` if we don't\n        .filter(param => param !== '')\n        .join('&');\n  }\n\n  private clone(update: Update|Update[]): HttpParams {\n    const clone = new HttpParams({encoder: this.encoder} as HttpParamsOptions);\n    clone.cloneFrom = this.cloneFrom || this;\n    clone.updates = (this.updates || []).concat(update);\n    return clone;\n  }\n\n  private init() {\n    if (this.map === null) {\n      this.map = new Map<string, string[]>();\n    }\n    if (this.cloneFrom !== null) {\n      this.cloneFrom.init();\n      this.cloneFrom.keys().forEach(key => this.map!.set(key, this.cloneFrom!.map!.get(key)!));\n      this.updates!.forEach(update => {\n        switch (update.op) {\n          case 'a':\n          case 's':\n            const base = (update.op === 'a' ? this.map!.get(update.param) : undefined) || [];\n            base.push(update.value!);\n            this.map!.set(update.param, base);\n            break;\n          case 'd':\n            if (update.value !== undefined) {\n              let base = this.map!.get(update.param) || [];\n              const idx = base.indexOf(update.value);\n              if (idx !== -1) {\n                base.splice(idx, 1);\n              }\n              if (base.length > 0) {\n                this.map!.set(update.param, base);\n              } else {\n                this.map!.delete(update.param);\n              }\n            } else {\n              this.map!.delete(update.param);\n              break;\n            }\n        }\n      });\n      this.cloneFrom = this.updates = null;\n    }\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {HttpHeaders} from './headers';\nimport {HttpParams} from './params';\n\n/**\n * Construction interface for `HttpRequest`s.\n *\n * All values are optional and will override default values if provided.\n */\ninterface HttpRequestInit {\n  headers?: HttpHeaders;\n  reportProgress?: boolean;\n  params?: HttpParams;\n  responseType?: 'arraybuffer'|'blob'|'json'|'text';\n  withCredentials?: boolean;\n}\n\n/**\n * Determine whether the given HTTP method may include a body.\n */\nfunction mightHaveBody(method: string): boolean {\n  switch (method) {\n    case 'DELETE':\n    case 'GET':\n    case 'HEAD':\n    case 'OPTIONS':\n    case 'JSONP':\n      return false;\n    default:\n      return true;\n  }\n}\n\n/**\n * Safely assert whether the given value is an ArrayBuffer.\n *\n * In some execution environments ArrayBuffer is not defined.\n */\nfunction isArrayBuffer(value: any): value is ArrayBuffer {\n  return typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer;\n}\n\n/**\n * Safely assert whether the given value is a Blob.\n *\n * In some execution environments Blob is not defined.\n */\nfunction isBlob(value: any): value is Blob {\n  return typeof Blob !== 'undefined' && value instanceof Blob;\n}\n\n/**\n * Safely assert whether the given value is a FormData instance.\n *\n * In some execution environments FormData is not defined.\n */\nfunction isFormData(value: any): value is FormData {\n  return typeof FormData !== 'undefined' && value instanceof FormData;\n}\n\n/**\n * An outgoing HTTP request with an optional typed body.\n *\n * `HttpRequest` represents an outgoing request, including URL, method,\n * headers, body, and other request configuration options. Instances should be\n * assumed to be immutable. To modify a `HttpRequest`, the `clone`\n * method should be used.\n *\n * @publicApi\n */\nexport class HttpRequest<T> {\n  /**\n   * The request body, or `null` if one isn't set.\n   *\n   * Bodies are not enforced to be immutable, as they can include a reference to any\n   * user-defined data type. However, interceptors should take care to preserve\n   * idempotence by treating them as such.\n   */\n  readonly body: T|null = null;\n\n  /**\n   * Outgoing headers for this request.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly headers!: HttpHeaders;\n\n  /**\n   * Whether this request should be made in a way that exposes progress events.\n   *\n   * Progress events are expensive (change detection runs on each event) and so\n   * they should only be requested if the consumer intends to monitor them.\n   */\n  readonly reportProgress: boolean = false;\n\n  /**\n   * Whether this request should be sent with outgoing credentials (cookies).\n   */\n  readonly withCredentials: boolean = false;\n\n  /**\n   * The expected response type of the server.\n   *\n   * This is used to parse the response appropriately before returning it to\n   * the requestee.\n   */\n  readonly responseType: 'arraybuffer'|'blob'|'json'|'text' = 'json';\n\n  /**\n   * The outgoing HTTP request method.\n   */\n  readonly method: string;\n\n  /**\n   * Outgoing URL parameters.\n   *\n   * To pass a string representation of HTTP parameters in the URL-query-string format,\n   * the `HttpParamsOptions`' `fromString` may be used. For example:\n   *\n   * ```\n   * new HttpParams({fromString: 'angular=awesome'})\n   * ```\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly params!: HttpParams;\n\n  /**\n   * The outgoing URL with all URL parameters set.\n   */\n  readonly urlWithParams: string;\n\n  constructor(method: 'DELETE'|'GET'|'HEAD'|'JSONP'|'OPTIONS', url: string, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(method: 'POST'|'PUT'|'PATCH', url: string, body: T|null, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(method: string, url: string, body: T|null, init?: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  });\n  constructor(\n      method: string, readonly url: string, third?: T|{\n        headers?: HttpHeaders,\n        reportProgress?: boolean,\n        params?: HttpParams,\n        responseType?: 'arraybuffer'|'blob'|'json'|'text',\n        withCredentials?: boolean,\n      }|null,\n      fourth?: {\n        headers?: HttpHeaders,\n        reportProgress?: boolean,\n        params?: HttpParams,\n        responseType?: 'arraybuffer'|'blob'|'json'|'text',\n        withCredentials?: boolean,\n      }) {\n    this.method = method.toUpperCase();\n    // Next, need to figure out which argument holds the HttpRequestInit\n    // options, if any.\n    let options: HttpRequestInit|undefined;\n\n    // Check whether a body argument is expected. The only valid way to omit\n    // the body argument is to use a known no-body method like GET.\n    if (mightHaveBody(this.method) || !!fourth) {\n      // Body is the third argument, options are the fourth.\n      this.body = (third !== undefined) ? third as T : null;\n      options = fourth;\n    } else {\n      // No body required, options are the third argument. The body stays null.\n      options = third as HttpRequestInit;\n    }\n\n    // If options have been passed, interpret them.\n    if (options) {\n      // Normalize reportProgress and withCredentials.\n      this.reportProgress = !!options.reportProgress;\n      this.withCredentials = !!options.withCredentials;\n\n      // Override default response type of 'json' if one is provided.\n      if (!!options.responseType) {\n        this.responseType = options.responseType;\n      }\n\n      // Override headers if they're provided.\n      if (!!options.headers) {\n        this.headers = options.headers;\n      }\n\n      if (!!options.params) {\n        this.params = options.params;\n      }\n    }\n\n    // If no headers have been passed in, construct a new HttpHeaders instance.\n    if (!this.headers) {\n      this.headers = new HttpHeaders();\n    }\n\n    // If no parameters have been passed in, construct a new HttpUrlEncodedParams instance.\n    if (!this.params) {\n      this.params = new HttpParams();\n      this.urlWithParams = url;\n    } else {\n      // Encode the parameters to a string in preparation for inclusion in the URL.\n      const params = this.params.toString();\n      if (params.length === 0) {\n        // No parameters, the visible URL is just the URL given at creation time.\n        this.urlWithParams = url;\n      } else {\n        // Does the URL already have query parameters? Look for '?'.\n        const qIdx = url.indexOf('?');\n        // There are 3 cases to handle:\n        // 1) No existing parameters -> append '?' followed by params.\n        // 2) '?' exists and is followed by existing query string ->\n        //    append '&' followed by params.\n        // 3) '?' exists at the end of the url -> append params directly.\n        // This basically amounts to determining the character, if any, with\n        // which to join the URL and parameters.\n        const sep: string = qIdx === -1 ? '?' : (qIdx < url.length - 1 ? '&' : '');\n        this.urlWithParams = url + sep + params;\n      }\n    }\n  }\n\n  /**\n   * Transform the free-form body into a serialized format suitable for\n   * transmission to the server.\n   */\n  serializeBody(): ArrayBuffer|Blob|FormData|string|null {\n    // If no body is present, no need to serialize it.\n    if (this.body === null) {\n      return null;\n    }\n    // Check whether the body is already in a serialized form. If so,\n    // it can just be returned directly.\n    if (isArrayBuffer(this.body) || isBlob(this.body) || isFormData(this.body) ||\n        typeof this.body === 'string') {\n      return this.body;\n    }\n    // Check whether the body is an instance of HttpUrlEncodedParams.\n    if (this.body instanceof HttpParams) {\n      return this.body.toString();\n    }\n    // Check whether the body is an object or array, and serialize with JSON if so.\n    if (typeof this.body === 'object' || typeof this.body === 'boolean' ||\n        Array.isArray(this.body)) {\n      return JSON.stringify(this.body);\n    }\n    // Fall back on toString() for everything else.\n    return (this.body as any).toString();\n  }\n\n  /**\n   * Examine the body and attempt to infer an appropriate MIME type\n   * for it.\n   *\n   * If no such type can be inferred, this method will return `null`.\n   */\n  detectContentTypeHeader(): string|null {\n    // An empty body has no content type.\n    if (this.body === null) {\n      return null;\n    }\n    // FormData bodies rely on the browser's content type assignment.\n    if (isFormData(this.body)) {\n      return null;\n    }\n    // Blobs usually have their own content type. If it doesn't, then\n    // no type can be inferred.\n    if (isBlob(this.body)) {\n      return this.body.type || null;\n    }\n    // Array buffers have unknown contents and thus no type can be inferred.\n    if (isArrayBuffer(this.body)) {\n      return null;\n    }\n    // Technically, strings could be a form of JSON data, but it's safe enough\n    // to assume they're plain strings.\n    if (typeof this.body === 'string') {\n      return 'text/plain';\n    }\n    // `HttpUrlEncodedParams` has its own content-type.\n    if (this.body instanceof HttpParams) {\n      return 'application/x-www-form-urlencoded;charset=UTF-8';\n    }\n    // Arrays, objects, boolean and numbers will be encoded as JSON.\n    if (typeof this.body === 'object' || typeof this.body === 'number' ||\n        typeof this.body === 'boolean') {\n      return 'application/json';\n    }\n    // No type could be inferred.\n    return null;\n  }\n\n  clone(): HttpRequest<T>;\n  clone(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: T|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string},\n  }): HttpRequest<T>;\n  clone<V>(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: V|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string},\n  }): HttpRequest<V>;\n  clone(update: {\n    headers?: HttpHeaders,\n    reportProgress?: boolean,\n    params?: HttpParams,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n    body?: any|null,\n    method?: string,\n    url?: string,\n    setHeaders?: {[name: string]: string|string[]},\n    setParams?: {[param: string]: string};\n  } = {}): HttpRequest<any> {\n    // For method, url, and responseType, take the current value unless\n    // it is overridden in the update hash.\n    const method = update.method || this.method;\n    const url = update.url || this.url;\n    const responseType = update.responseType || this.responseType;\n\n    // The body is somewhat special - a `null` value in update.body means\n    // whatever current body is present is being overridden with an empty\n    // body, whereas an `undefined` value in update.body implies no\n    // override.\n    const body = (update.body !== undefined) ? update.body : this.body;\n\n    // Carefully handle the boolean options to differentiate between\n    // `false` and `undefined` in the update args.\n    const withCredentials =\n        (update.withCredentials !== undefined) ? update.withCredentials : this.withCredentials;\n    const reportProgress =\n        (update.reportProgress !== undefined) ? update.reportProgress : this.reportProgress;\n\n    // Headers and params may be appended to if `setHeaders` or\n    // `setParams` are used.\n    let headers = update.headers || this.headers;\n    let params = update.params || this.params;\n\n    // Check whether the caller has asked to add headers.\n    if (update.setHeaders !== undefined) {\n      // Set every requested header.\n      headers =\n          Object.keys(update.setHeaders)\n              .reduce((headers, name) => headers.set(name, update.setHeaders![name]), headers);\n    }\n\n    // Check whether the caller has asked to set params.\n    if (update.setParams) {\n      // Set every requested param.\n      params = Object.keys(update.setParams)\n                   .reduce((params, param) => params.set(param, update.setParams![param]), params);\n    }\n\n    // Finally, construct the new HttpRequest using the pieces from above.\n    return new HttpRequest(method, url, body, {\n      params,\n      headers,\n      reportProgress,\n      responseType,\n      withCredentials,\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {HttpHeaders} from './headers';\n\n/**\n * Type enumeration for the different kinds of `HttpEvent`.\n *\n * @publicApi\n */\nexport enum HttpEventType {\n  /**\n   * The request was sent out over the wire.\n   */\n  Sent,\n\n  /**\n   * An upload progress event was received.\n   */\n  UploadProgress,\n\n  /**\n   * The response status code and headers were received.\n   */\n  ResponseHeader,\n\n  /**\n   * A download progress event was received.\n   */\n  DownloadProgress,\n\n  /**\n   * The full response including the body was received.\n   */\n  Response,\n\n  /**\n   * A custom event from an interceptor or a backend.\n   */\n  User,\n}\n\n/**\n * Base interface for progress events.\n *\n * @publicApi\n */\nexport interface HttpProgressEvent {\n  /**\n   * Progress event type is either upload or download.\n   */\n  type: HttpEventType.DownloadProgress|HttpEventType.UploadProgress;\n\n  /**\n   * Number of bytes uploaded or downloaded.\n   */\n  loaded: number;\n\n  /**\n   * Total number of bytes to upload or download. Depending on the request or\n   * response, this may not be computable and thus may not be present.\n   */\n  total?: number;\n}\n\n/**\n * A download progress event.\n *\n * @publicApi\n */\nexport interface HttpDownloadProgressEvent extends HttpProgressEvent {\n  type: HttpEventType.DownloadProgress;\n\n  /**\n   * The partial response body as downloaded so far.\n   *\n   * Only present if the responseType was `text`.\n   */\n  partialText?: string;\n}\n\n/**\n * An upload progress event.\n *\n * @publicApi\n */\nexport interface HttpUploadProgressEvent extends HttpProgressEvent {\n  type: HttpEventType.UploadProgress;\n}\n\n/**\n * An event indicating that the request was sent to the server. Useful\n * when a request may be retried multiple times, to distinguish between\n * retries on the final event stream.\n *\n * @publicApi\n */\nexport interface HttpSentEvent {\n  type: HttpEventType.Sent;\n}\n\n/**\n * A user-defined event.\n *\n * Grouping all custom events under this type ensures they will be handled\n * and forwarded by all implementations of interceptors.\n *\n * @publicApi\n */\nexport interface HttpUserEvent<T> {\n  type: HttpEventType.User;\n}\n\n/**\n * An error that represents a failed attempt to JSON.parse text coming back\n * from the server.\n *\n * It bundles the Error object with the actual response body that failed to parse.\n *\n *\n */\nexport interface HttpJsonParseError {\n  error: Error;\n  text: string;\n}\n\n/**\n * Union type for all possible events on the response stream.\n *\n * Typed according to the expected type of the response.\n *\n * @publicApi\n */\nexport type HttpEvent<T> =\n    HttpSentEvent|HttpHeaderResponse|HttpResponse<T>|HttpProgressEvent|HttpUserEvent<T>;\n\n/**\n * Base class for both `HttpResponse` and `HttpHeaderResponse`.\n *\n * @publicApi\n */\nexport abstract class HttpResponseBase {\n  /**\n   * All response headers.\n   */\n  readonly headers: HttpHeaders;\n\n  /**\n   * Response status code.\n   */\n  readonly status: number;\n\n  /**\n   * Textual description of response status code, defaults to OK.\n   *\n   * Do not depend on this.\n   */\n  readonly statusText: string;\n\n  /**\n   * URL of the resource retrieved, or null if not available.\n   */\n  readonly url: string|null;\n\n  /**\n   * Whether the status code falls in the 2xx range.\n   */\n  readonly ok: boolean;\n\n  /**\n   * Type of the response, narrowed to either the full response or the header.\n   */\n  // TODO(issue/24571): remove '!'.\n  readonly type!: HttpEventType.Response|HttpEventType.ResponseHeader;\n\n  /**\n   * Super-constructor for all responses.\n   *\n   * The single parameter accepted is an initialization hash. Any properties\n   * of the response passed there will override the default values.\n   */\n  constructor(\n      init: {\n        headers?: HttpHeaders,\n        status?: number,\n        statusText?: string,\n        url?: string,\n      },\n      defaultStatus: number = 200, defaultStatusText: string = 'OK') {\n    // If the hash has values passed, use them to initialize the response.\n    // Otherwise use the default values.\n    this.headers = init.headers || new HttpHeaders();\n    this.status = init.status !== undefined ? init.status : defaultStatus;\n    this.statusText = init.statusText || defaultStatusText;\n    this.url = init.url || null;\n\n    // Cache the ok value to avoid defining a getter.\n    this.ok = this.status >= 200 && this.status < 300;\n  }\n}\n\n/**\n * A partial HTTP response which only includes the status and header data,\n * but no response body.\n *\n * `HttpHeaderResponse` is a `HttpEvent` available on the response\n * event stream, only when progress events are requested.\n *\n * @publicApi\n */\nexport class HttpHeaderResponse extends HttpResponseBase {\n  /**\n   * Create a new `HttpHeaderResponse` with the given parameters.\n   */\n  constructor(init: {\n    headers?: HttpHeaders,\n    status?: number,\n    statusText?: string,\n    url?: string,\n  } = {}) {\n    super(init);\n  }\n\n  readonly type: HttpEventType.ResponseHeader = HttpEventType.ResponseHeader;\n\n  /**\n   * Copy this `HttpHeaderResponse`, overriding its contents with the\n   * given parameter hash.\n   */\n  clone(update: {headers?: HttpHeaders; status?: number; statusText?: string; url?: string;} = {}):\n      HttpHeaderResponse {\n    // Perform a straightforward initialization of the new HttpHeaderResponse,\n    // overriding the current parameters with new ones if given.\n    return new HttpHeaderResponse({\n      headers: update.headers || this.headers,\n      status: update.status !== undefined ? update.status : this.status,\n      statusText: update.statusText || this.statusText,\n      url: update.url || this.url || undefined,\n    });\n  }\n}\n\n/**\n * A full HTTP response, including a typed response body (which may be `null`\n * if one was not returned).\n *\n * `HttpResponse` is a `HttpEvent` available on the response event\n * stream.\n *\n * @publicApi\n */\nexport class HttpResponse<T> extends HttpResponseBase {\n  /**\n   * The response body, or `null` if one was not returned.\n   */\n  readonly body: T|null;\n\n  /**\n   * Construct a new `HttpResponse`.\n   */\n  constructor(init: {\n    body?: T|null,\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  } = {}) {\n    super(init);\n    this.body = init.body !== undefined ? init.body : null;\n  }\n\n  readonly type: HttpEventType.Response = HttpEventType.Response;\n\n  clone(): HttpResponse<T>;\n  clone(update: {headers?: HttpHeaders; status?: number; statusText?: string; url?: string;}):\n      HttpResponse<T>;\n  clone<V>(update: {\n    body?: V|null,\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  }): HttpResponse<V>;\n  clone(update: {\n    body?: any|null;\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  } = {}): HttpResponse<any> {\n    return new HttpResponse<any>({\n      body: (update.body !== undefined) ? update.body : this.body,\n      headers: update.headers || this.headers,\n      status: (update.status !== undefined) ? update.status : this.status,\n      statusText: update.statusText || this.statusText,\n      url: update.url || this.url || undefined,\n    });\n  }\n}\n\n/**\n * A response that represents an error or failure, either from a\n * non-successful HTTP status, an error while executing the request,\n * or some other failure which occurred during the parsing of the response.\n *\n * Any error returned on the `Observable` response stream will be\n * wrapped in an `HttpErrorResponse` to provide additional context about\n * the state of the HTTP layer when the error occurred. The error property\n * will contain either a wrapped Error object or the error response returned\n * from the server.\n *\n * @publicApi\n */\nexport class HttpErrorResponse extends HttpResponseBase implements Error {\n  readonly name = 'HttpErrorResponse';\n  readonly message: string;\n  readonly error: any|null;\n\n  /**\n   * Errors are never okay, even when the status code is in the 2xx success range.\n   */\n  readonly ok = false;\n\n  constructor(init: {\n    error?: any;\n    headers?: HttpHeaders;\n    status?: number;\n    statusText?: string;\n    url?: string;\n  }) {\n    // Initialize with a default status of 0 / Unknown Error.\n    super(init, 0, 'Unknown Error');\n\n    // If the response was successful, then this was a parse error. Otherwise, it was\n    // a protocol-level failure of some sort. Either the request failed in transit\n    // or the server returned an unsuccessful status code.\n    if (this.status >= 200 && this.status < 300) {\n      this.message = `Http failure during parsing for ${init.url || '(unknown url)'}`;\n    } else {\n      this.message = `Http failure response for ${init.url || '(unknown url)'}: ${init.status} ${\n          init.statusText}`;\n    }\n    this.error = init.error || null;\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Observable, of} from 'rxjs';\nimport {concatMap, filter, map} from 'rxjs/operators';\n\nimport {HttpHandler} from './backend';\nimport {HttpHeaders} from './headers';\nimport {HttpParams, HttpParamsOptions} from './params';\nimport {HttpRequest} from './request';\nimport {HttpEvent, HttpResponse} from './response';\n\n\n/**\n * Constructs an instance of `HttpRequestOptions<T>` from a source `HttpMethodOptions` and\n * the given `body`. This function clones the object and adds the body.\n *\n * Note that the `responseType` *options* value is a String that identifies the\n * single data type of the response.\n * A single overload version of the method handles each response type.\n * The value of `responseType` cannot be a union, as the combined signature could imply.\n *\n */\nfunction addBody<T>(\n    options: {\n      headers?: HttpHeaders|{[header: string]: string | string[]},\n      observe?: 'body'|'events'|'response',\n      params?: HttpParams|{[param: string]: string | string[]},\n      reportProgress?: boolean,\n      responseType?: 'arraybuffer'|'blob'|'json'|'text',\n      withCredentials?: boolean,\n    },\n    body: T|null): any {\n  return {\n    body,\n    headers: options.headers,\n    observe: options.observe,\n    params: options.params,\n    reportProgress: options.reportProgress,\n    responseType: options.responseType,\n    withCredentials: options.withCredentials,\n  };\n}\n\n/**\n * Performs HTTP requests.\n * This service is available as an injectable class, with methods to perform HTTP requests.\n * Each request method has multiple signatures, and the return type varies based on\n * the signature that is called (mainly the values of `observe` and `responseType`).\n *\n * Note that the `responseType` *options* value is a String that identifies the\n * single data type of the response.\n * A single overload version of the method handles each response type.\n * The value of `responseType` cannot be a union, as the combined signature could imply.\n\n *\n * @usageNotes\n * Sample HTTP requests for the [Tour of Heroes](/tutorial/toh-pt0) application.\n *\n * ### HTTP Request Example\n *\n * ```\n *  // GET heroes whose name contains search term\n * searchHeroes(term: string): observable<Hero[]>{\n *\n *  const params = new HttpParams({fromString: 'name=term'});\n *    return this.httpClient.request('GET', this.heroesUrl, {responseType:'json', params});\n * }\n * ```\n *\n * Alternatively, the parameter string can be used without invoking HttpParams\n * by directly joining to the URL.\n * ```\n * this.httpClient.request('GET', this.heroesUrl + '?' + 'name=term', {responseType:'json'});\n * ```\n *\n *\n * ### JSONP Example\n * ```\n * requestJsonp(url, callback = 'callback') {\n *  return this.httpClient.jsonp(this.heroesURL, callback);\n * }\n * ```\n *\n * ### PATCH Example\n * ```\n * // PATCH one of the heroes' name\n * patchHero (id: number, heroName: string): Observable<{}> {\n * const url = `${this.heroesUrl}/${id}`;   // PATCH api/heroes/42\n *  return this.httpClient.patch(url, {name: heroName}, httpOptions)\n *    .pipe(catchError(this.handleError('patchHero')));\n * }\n * ```\n *\n * @see [HTTP Guide](guide/http)\n * @see [HTTP Request](api/common/http/HttpRequest)\n *\n * @publicApi\n */\n@Injectable()\nexport class HttpClient {\n  constructor(private handler: HttpHandler) {}\n\n  /**\n   * Sends an `HttpRequest` and returns a stream of `HttpEvent`s.\n   *\n   * @return An `Observable` of the response, with the response body as a stream of `HttpEvent`s.\n   */\n  request<R>(req: HttpRequest<any>): Observable<HttpEvent<R>>;\n\n  /**\n   * Constructs a request that interprets the body as an `ArrayBuffer` and returns the response in\n   * an `ArrayBuffer`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a request that interprets the body as a blob and returns\n   * the response as a blob.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a request that interprets the body as a text string and\n   * returns a string value.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a request that interprets the body as an `ArrayBuffer` and returns the\n   * the full event stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an array of `HttpEvent`s for\n   * the request.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    params?: HttpParams|{[param: string]: string | string[]}, observe: 'events',\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a request that interprets the body as a `Blob` and returns\n   * the full event stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a request which interprets the body as a text string and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the  request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body of type `Object`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<any>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<R>>;\n\n  /**\n   * Constructs a request which interprets the body as an `ArrayBuffer`\n   * and returns the full `HttpResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body as an `ArrayBuffer`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a request which interprets the body as a `Blob` and returns the full `HttpResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of type `Blob`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a request which interprets the body as a text stream and returns the full\n   * `HttpResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the HTTP response, with the response body of type string.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full\n   * `HttpResponse`.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse`,\n   * with the response body of type `Object`.\n   */\n  request(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns\n   * the full `HttpResponse` with the response body in the requested type.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the full `HttpResponse`, with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    reportProgress?: boolean, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<R>>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object and returns the full\n   * `HttpResponse` as a JSON object.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of type `Object`.\n   */\n  request(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    reportProgress?: boolean,\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a request which interprets the body as a JSON object\n   * with the response body of the requested type.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of type `R`.\n   */\n  request<R>(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    responseType?: 'json',\n    reportProgress?: boolean,\n    withCredentials?: boolean,\n  }): Observable<R>;\n\n  /**\n   * Constructs a request where response type and requested observable are not known statically.\n   *\n   * @param method  The HTTP method.\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the reuested response, wuth body of type `any`.\n   */\n  request(method: string, url: string, options?: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    params?: HttpParams|{[param: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  }): Observable<any>;\n\n  /**\n   * Constructs an observable for a generic HTTP request that, when subscribed,\n   * fires the request through the chain of registered interceptors and on to the\n   * server.\n   *\n   * You can pass an `HttpRequest` directly as the only parameter. In this case,\n   * the call returns an observable of the raw `HttpEvent` stream.\n   *\n   * Alternatively you can pass an HTTP method as the first parameter,\n   * a URL string as the second, and an options hash containing the request body as the third.\n   * See `addBody()`. In this case, the specified `responseType` and `observe` options determine the\n   * type of returned observable.\n   *   * The `responseType` value determines how a successful response body is parsed.\n   *   * If `responseType` is the default `json`, you can pass a type interface for the resulting\n   * object as a type parameter to the call.\n   *\n   * The `observe` value determines the return type, according to what you are interested in\n   * observing.\n   *   * An `observe` value of events returns an observable of the raw `HttpEvent` stream, including\n   * progress events by default.\n   *   * An `observe` value of response returns an observable of `HttpResponse<T>`,\n   * where the `T` parameter depends on the `responseType` and any optionally provided type\n   * parameter.\n   *   * An `observe` value of body returns an observable of `<T>` with the same `T` body type.\n   *\n   */\n  request(first: string|HttpRequest<any>, url?: string, options: {\n    body?: any,\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    let req: HttpRequest<any>;\n    // First, check whether the primary argument is an instance of `HttpRequest`.\n    if (first instanceof HttpRequest) {\n      // It is. The other arguments must be undefined (per the signatures) and can be\n      // ignored.\n      req = first;\n    } else {\n      // It's a string, so it represents a URL. Construct a request based on it,\n      // and incorporate the remaining arguments (assuming `GET` unless a method is\n      // provided.\n\n      // Figure out the headers.\n      let headers: HttpHeaders|undefined = undefined;\n      if (options.headers instanceof HttpHeaders) {\n        headers = options.headers;\n      } else {\n        headers = new HttpHeaders(options.headers);\n      }\n\n      // Sort out parameters.\n      let params: HttpParams|undefined = undefined;\n      if (!!options.params) {\n        if (options.params instanceof HttpParams) {\n          params = options.params;\n        } else {\n          params = new HttpParams({fromObject: options.params} as HttpParamsOptions);\n        }\n      }\n\n      // Construct the request.\n      req = new HttpRequest(first, url!, (options.body !== undefined ? options.body : null), {\n        headers,\n        params,\n        reportProgress: options.reportProgress,\n        // By default, JSON is assumed to be returned for all calls.\n        responseType: options.responseType || 'json',\n        withCredentials: options.withCredentials,\n      });\n    }\n\n    // Start with an Observable.of() the initial request, and run the handler (which\n    // includes all interceptors) inside a concatMap(). This way, the handler runs\n    // inside an Observable chain, which causes interceptors to be re-run on every\n    // subscription (this also makes retries re-run the handler, including interceptors).\n    const events$: Observable<HttpEvent<any>> =\n        of(req).pipe(concatMap((req: HttpRequest<any>) => this.handler.handle(req)));\n\n    // If coming via the API signature which accepts a previously constructed HttpRequest,\n    // the only option is to get the event stream. Otherwise, return the event stream if\n    // that is what was requested.\n    if (first instanceof HttpRequest || options.observe === 'events') {\n      return events$;\n    }\n\n    // The requested stream contains either the full response or the body. In either\n    // case, the first step is to filter the event stream to extract a stream of\n    // responses(s).\n    const res$: Observable<HttpResponse<any>> = <Observable<HttpResponse<any>>>events$.pipe(\n        filter((event: HttpEvent<any>) => event instanceof HttpResponse));\n\n    // Decide which stream to return.\n    switch (options.observe || 'body') {\n      case 'body':\n        // The requested stream is the body. Map the response stream to the response\n        // body. This could be done more simply, but a misbehaving interceptor might\n        // transform the response body into a different format and ignore the requested\n        // responseType. Guard against this by validating that the response is of the\n        // requested type.\n        switch (req.responseType) {\n          case 'arraybuffer':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is an ArrayBuffer.\n              if (res.body !== null && !(res.body instanceof ArrayBuffer)) {\n                throw new Error('Response is not an ArrayBuffer.');\n              }\n              return res.body;\n            }));\n          case 'blob':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is a Blob.\n              if (res.body !== null && !(res.body instanceof Blob)) {\n                throw new Error('Response is not a Blob.');\n              }\n              return res.body;\n            }));\n          case 'text':\n            return res$.pipe(map((res: HttpResponse<any>) => {\n              // Validate that the body is a string.\n              if (res.body !== null && typeof res.body !== 'string') {\n                throw new Error('Response is not a string.');\n              }\n              return res.body;\n            }));\n          case 'json':\n          default:\n            // No validation needed for JSON responses, as they can be of any type.\n            return res$.pipe(map((res: HttpResponse<any>) => res.body));\n        }\n      case 'response':\n        // The response stream was requested directly, so return it.\n        return res$;\n      default:\n        // Guard against new future observe types being added.\n        throw new Error(`Unreachable: unhandled observe type ${options.observe}}`);\n    }\n  }\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`\n   *  and returns the response as an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response body as a `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text string and returns\n   * a string.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request, with the response body as a\n   * `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with the response\n   * body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with response body of\n   * type `Object`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `DELETE`request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request, with a response\n   * body in the requested type.\n   */\n  delete<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as an `ArrayBuffer` and returns\n   *  the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse`, with the response body as an `ArrayBuffer`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a `Blob` and returns the full\n   * `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of type `Blob`.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a text stream and\n   *  returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse`, with the response body of type string.\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `DELETE` request the interprets the body as a JSON object and returns\n   * the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of type `Object`.\n   *\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with the response body of the requested type.\n   */\n  delete<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `DELETE` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Object`.\n   */\n  delete(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a DELETE request that interprets the body as a JSON object and returns\n   * the response in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with response body in the requested type.\n   */\n  delete<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `DELETE` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   */\n  delete(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('DELETE', url, options as any);\n  }\n\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns the\n   * response in an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob`\n   * and returns the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text string\n   * and returns the response as a string value.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and returns\n   *  the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with the response\n   * body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text string and returns\n   * the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type `Object`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with a response body in the requested type.\n   */\n  get<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as an `ArrayBuffer` and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a `Blob` and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a text stream and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type string.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse`,\n   * with the response body of type `Object`.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the full `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  get<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   *\n   * @return An `Observable` of the response body as a JSON object.\n   */\n  get(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `GET` request that interprets the body as a JSON object and returns\n   * the response body in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse`, with a response body in the requested type.\n   */\n  get<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `GET` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   */\n  get(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('GET', url, options as any);\n  }\n\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer` and\n   * returns the response as an `ArrayBuffer`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return  An `Observable` of the response, with the response body as a `Blob`.\n   */\n\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a text string and returns the response\n   * as a string value.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an  `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as a `Blob`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with the response body of type\n   * string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object\n   * and returns the full HTTP event stream.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with a response body of\n   * type `Object`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the full event stream.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with a response body in the requested type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   */\n  head<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full HTTP response.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a `Blob` and returns\n   * the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a blob.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as text stream\n   * and returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type string.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type `Object`.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a responmse body of the requested type.\n   */\n  head<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  head(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `HEAD` request that interprets the body as a JSON object and returns\n   * the response in a given type.\n   *\n   * @param url     The endpoint URL.\n   * @param options The HTTP options to send with the request.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body of the given type.\n   */\n  head<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `HEAD` request to execute on the server. The `HEAD` method returns\n   * meta information about the resource without transferring the\n   * resource itself. See the individual overloads for\n   * details on the return type.\n   */\n  head(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('HEAD', url, options as any);\n  }\n\n  /**\n   * Constructs a `JSONP` request for the given URL and name of the callback parameter.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   * @return An `Observable` of the response object, with response body as an object.\n   */\n  jsonp(url: string, callbackParam: string): Observable<Object>;\n\n  /**\n   * Constructs a `JSONP` request for the given URL and name of the callback parameter.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   * You must install a suitable interceptor, such as one provided by `HttpClientJsonpModule`.\n   * If no such interceptor is reached,\n   * then the `JSONP` request can be rejected by the configured backend.\n   *\n   * @return An `Observable` of the response object, with response body in the requested type.\n   */\n  jsonp<T>(url: string, callbackParam: string): Observable<T>;\n\n  /**\n   * Constructs an `Observable` that, when subscribed, causes a request with the special method\n   * `JSONP` to be dispatched via the interceptor pipeline.\n   * The [JSONP pattern](https://en.wikipedia.org/wiki/JSONP) works around limitations of certain\n   * API endpoints that don't support newer,\n   * and preferable [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) protocol.\n   * JSONP treats the endpoint API as a JavaScript file and tricks the browser to process the\n   * requests even if the API endpoint is not located on the same domain (origin) as the client-side\n   * application making the request.\n   * The endpoint API must support JSONP callback for JSONP requests to work.\n   * The resource API returns the JSON response wrapped in a callback function.\n   * You can pass the callback function name as one of the query parameters.\n   * Note that JSONP requests can only be used with `GET` requests.\n   *\n   * @param url The resource URL.\n   * @param callbackParam The callback function name.\n   *\n   */\n  jsonp<T>(url: string, callbackParam: string): Observable<T> {\n    return this.request<any>('JSONP', url, {\n      params: new HttpParams().append(callbackParam, 'JSONP_CALLBACK'),\n      observe: 'body',\n      responseType: 'json',\n    });\n  }\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an\n   * `ArrayBuffer` and returns the response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a text string and\n   * returns a string value.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a text string\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request with the response\n   * body of type `Object`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with a response body in the requested type.\n   */\n  options<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a `Blob`\n   *  and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as text stream\n   * and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type string.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body of type `Object`.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and\n   * returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  options<T>(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the\n   * response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  options(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs an `OPTIONS` request that interprets the body as a JSON object and returns the\n   * response in a given type.\n   *\n   * @param url The endpoint URL.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse`, with a response body of the given type.\n   */\n  options<T>(url: string, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an `Observable` that, when subscribed, causes the configured\n   * `OPTIONS` request to execute on the server. This method allows the client\n   * to determine the supported HTTP methods and other capabilites of an endpoint,\n   * without implying a resource action. See the individual overloads for\n   * details on the return type.\n   */\n  options(url: string, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('OPTIONS', url, options as any);\n  }\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and returns\n   * the response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the response\n   * as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer` and\n   *  returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob`\n   *  and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request, with the\n   * response body as `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text string and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request, with a\n   * response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with a response body of type `Object`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of all the `HttpEvent`s for the request,\n   * with a response body in the requested type.\n   */\n  patch<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as an `ArrayBuffer`\n   *  and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a `Blob` and returns the full\n   * `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a text stream and returns the\n   * full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with a response body of type string.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the given type.\n   */\n  patch<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object and\n   * returns the response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  patch(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `PATCH` request that interprets the body as a JSON object\n   * and returns the response in a given type.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to edit.\n   * @param options HTTP options.\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the given type.\n   */\n  patch<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `PATCH` request to execute on the server. See the individual overloads for\n   * details on the return type.\n   */\n  patch(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('PATCH', url, addBody(options, body));\n  }\n\n  /**\n   * Constructs a `POST` request that interprets the body as an `ArrayBuffer` and returns\n   * an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options.\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob` and returns the\n   * response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as an `ArrayBuffer` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob`\n   * and returns the response in an observable of the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with the response body as `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text string and returns the full\n   * event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of all `HttpEvent`s for the request,\n   * with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a POST request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of all `HttpEvent`s for the request,\n   * with a response body of type `Object`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a POST request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with a response body in the requested type.\n   */\n  post<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a POST request that interprets the body as an `ArrayBuffer`\n   *  and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request, with the response body as an\n   * `ArrayBuffer`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a `Blob` and returns the full\n   * `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a text stream and returns\n   * the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request,\n   * with a response body of type string.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object\n   * and returns the full `HttpResponse`.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request, with a response body of type\n   * `Object`.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object and returns the full\n   * `HttpResponse`.\n   *\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request, with a response body in the\n   * requested type.\n   */\n  post<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a\n   * JSON object and returns the response body as a JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a JSON object.\n   */\n  post(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `POST` request that interprets the body as a JSON object\n   * and returns an observable of the response.\n   *\n   * @param url The endpoint URL.\n   * @param body The content to replace with.\n   * @param options HTTP options\n   *\n   * @return  An `Observable` of the `HttpResponse` for the request, with a response body in the\n   * requested type.\n   */\n  post<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `POST` request to execute on the server. The server responds with the location of\n   * the replaced resource. See the individual overloads for\n   * details on the return type.\n   */\n  post(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('POST', url, addBody(options, body));\n  }\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and returns the\n   * response as an `ArrayBuffer`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as an `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<ArrayBuffer>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns\n   * the response as a `Blob`.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<Blob>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text string and\n   * returns the response as a string value.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response, with a response body of type string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<string>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an `ArrayBuffer` and\n   * returns the full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as an `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Blob>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text string and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with a response body\n   * of type string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<string>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the full event\n   * stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request, with a response body of\n   * type `Object`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<Object>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the\n   * full event stream.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of all `HttpEvent`s for the request,\n   * with a response body in the requested type.\n   */\n  put<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'events',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpEvent<T>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an\n   * `ArrayBuffer` and returns an observable of the full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request, with the response body as an\n   * `ArrayBuffer`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'arraybuffer',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<ArrayBuffer>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a `Blob` and returns the\n   * full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with the response body as a `Blob`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'blob',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Blob>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a text stream and returns the\n   * full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request, with a response body of type\n   * string.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean, responseType: 'text',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<string>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object and returns the full HTTP\n   * response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request, with a response body\n   * of type 'Object`.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<Object>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an instance of the requested type and\n   * returns the full HTTP response.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the `HttpResponse` for the request,\n   * with a response body in the requested type.\n   */\n  put<T>(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]}, observe: 'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<HttpResponse<T>>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as a JSON object\n   * and returns an observable of JSON object.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the response as a JSON object.\n   */\n  put(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<Object>;\n\n  /**\n   * Constructs a `PUT` request that interprets the body as an instance of the requested type\n   * and returns an observable of the requested type.\n   *\n   * @param url The endpoint URL.\n   * @param body The resources to add/update.\n   * @param options HTTP options\n   *\n   * @return An `Observable` of the requested type.\n   */\n  put<T>(url: string, body: any|null, options?: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'json',\n    withCredentials?: boolean,\n  }): Observable<T>;\n\n  /**\n   * Constructs an observable that, when subscribed, causes the configured\n   * `PUT` request to execute on the server. The `PUT` method replaces an existing resource\n   * with a new set of values.\n   * See the individual overloads for details on the return type.\n   */\n  put(url: string, body: any|null, options: {\n    headers?: HttpHeaders|{[header: string]: string | string[]},\n    observe?: 'body'|'events'|'response',\n    params?: HttpParams|{[param: string]: string | string[]},\n    reportProgress?: boolean,\n    responseType?: 'arraybuffer'|'blob'|'json'|'text',\n    withCredentials?: boolean,\n  } = {}): Observable<any> {\n    return this.request<any>('PUT', url, addBody(options, body));\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, InjectionToken} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpHandler} from './backend';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\n/**\n * Intercepts and handles an `HttpRequest` or `HttpResponse`.\n *\n * Most interceptors transform the outgoing request before passing it to the\n * next interceptor in the chain, by calling `next.handle(transformedReq)`.\n * An interceptor may transform the\n * response event stream as well, by applying additional RxJS operators on the stream\n * returned by `next.handle()`.\n *\n * More rarely, an interceptor may handle the request entirely,\n * and compose a new event stream instead of invoking `next.handle()`. This is an\n * acceptable behavior, but keep in mind that further interceptors will be skipped entirely.\n *\n * It is also rare but valid for an interceptor to return multiple responses on the\n * event stream for a single request.\n *\n * @publicApi\n *\n * @see [HTTP Guide](guide/http#intercepting-requests-and-responses)\n *\n * @usageNotes\n *\n * To use the same instance of `HttpInterceptors` for the entire app, import the `HttpClientModule`\n * only in your `AppModule`, and add the interceptors to the root application injector .\n * If you import `HttpClientModule` multiple times across different modules (for example, in lazy\n * loading modules), each import creates a new copy of the `HttpClientModule`, which overwrites the\n * interceptors provided in the root module.\n *\n */\nexport interface HttpInterceptor {\n  /**\n   * Identifies and handles a given HTTP request.\n   * @param req The outgoing request object to handle.\n   * @param next The next interceptor in the chain, or the backend\n   * if no interceptors remain in the chain.\n   * @returns An observable of the event stream.\n   */\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;\n}\n\n/**\n * `HttpHandler` which applies an `HttpInterceptor` to an `HttpRequest`.\n *\n *\n */\nexport class HttpInterceptorHandler implements HttpHandler {\n  constructor(private next: HttpHandler, private interceptor: HttpInterceptor) {}\n\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    return this.interceptor.intercept(req, this.next);\n  }\n}\n\n/**\n * A multi-provider token that represents the array of registered\n * `HttpInterceptor` objects.\n *\n * @publicApi\n */\nexport const HTTP_INTERCEPTORS = new InjectionToken<HttpInterceptor[]>('HTTP_INTERCEPTORS');\n\n@Injectable()\nexport class NoopInterceptor implements HttpInterceptor {\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT} from '@angular/common';\nimport {Inject, Injectable} from '@angular/core';\nimport {Observable, Observer} from 'rxjs';\n\nimport {HttpBackend, HttpHandler} from './backend';\nimport {HttpRequest} from './request';\nimport {HttpErrorResponse, HttpEvent, HttpEventType, HttpResponse} from './response';\n\n// Every request made through JSONP needs a callback name that's unique across the\n// whole page. Each request is assigned an id and the callback name is constructed\n// from that. The next id to be assigned is tracked in a global variable here that\n// is shared among all applications on the page.\nlet nextRequestId: number = 0;\n\n// Error text given when a JSONP script is injected, but doesn't invoke the callback\n// passed in its URL.\nexport const JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.';\n\n// Error text given when a request is passed to the JsonpClientBackend that doesn't\n// have a request method JSONP.\nexport const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use JSONP request method.';\nexport const JSONP_ERR_WRONG_RESPONSE_TYPE = 'JSONP requests must use Json response type.';\n\n/**\n * DI token/abstract type representing a map of JSONP callbacks.\n *\n * In the browser, this should always be the `window` object.\n *\n *\n */\nexport abstract class JsonpCallbackContext {\n  [key: string]: (data: any) => void;\n}\n\n/**\n * Processes an `HttpRequest` with the JSONP method,\n * by performing JSONP style requests.\n * @see `HttpHandler`\n * @see `HttpXhrBackend`\n *\n * @publicApi\n */\n@Injectable()\nexport class JsonpClientBackend implements HttpBackend {\n  /**\n   * A resolved promise that can be used to schedule microtasks in the event handlers.\n   */\n  private readonly resolvedPromise = Promise.resolve();\n\n  constructor(private callbackMap: JsonpCallbackContext, @Inject(DOCUMENT) private document: any) {}\n\n  /**\n   * Get the name of the next callback method, by incrementing the global `nextRequestId`.\n   */\n  private nextCallback(): string {\n    return `ng_jsonp_callback_${nextRequestId++}`;\n  }\n\n  /**\n   * Processes a JSONP request and returns an event stream of the results.\n   * @param req The request object.\n   * @returns An observable of the response events.\n   *\n   */\n  handle(req: HttpRequest<never>): Observable<HttpEvent<any>> {\n    // Firstly, check both the method and response type. If either doesn't match\n    // then the request was improperly routed here and cannot be handled.\n    if (req.method !== 'JSONP') {\n      throw new Error(JSONP_ERR_WRONG_METHOD);\n    } else if (req.responseType !== 'json') {\n      throw new Error(JSONP_ERR_WRONG_RESPONSE_TYPE);\n    }\n\n    // Everything else happens inside the Observable boundary.\n    return new Observable<HttpEvent<any>>((observer: Observer<HttpEvent<any>>) => {\n      // The first step to make a request is to generate the callback name, and replace the\n      // callback placeholder in the URL with the name. Care has to be taken here to ensure\n      // a trailing &, if matched, gets inserted back into the URL in the correct place.\n      const callback = this.nextCallback();\n      const url = req.urlWithParams.replace(/=JSONP_CALLBACK(&|$)/, `=${callback}$1`);\n\n      // Construct the <script> tag and point it at the URL.\n      const node = this.document.createElement('script');\n      node.src = url;\n\n      // A JSONP request requires waiting for multiple callbacks. These variables\n      // are closed over and track state across those callbacks.\n\n      // The response object, if one has been received, or null otherwise.\n      let body: any|null = null;\n\n      // Whether the response callback has been called.\n      let finished: boolean = false;\n\n      // Whether the request has been cancelled (and thus any other callbacks)\n      // should be ignored.\n      let cancelled: boolean = false;\n\n      // Set the response callback in this.callbackMap (which will be the window\n      // object in the browser. The script being loaded via the <script> tag will\n      // eventually call this callback.\n      this.callbackMap[callback] = (data?: any) => {\n        // Data has been received from the JSONP script. Firstly, delete this callback.\n        delete this.callbackMap[callback];\n\n        // Next, make sure the request wasn't cancelled in the meantime.\n        if (cancelled) {\n          return;\n        }\n\n        // Set state to indicate data was received.\n        body = data;\n        finished = true;\n      };\n\n      // cleanup() is a utility closure that removes the <script> from the page and\n      // the response callback from the window. This logic is used in both the\n      // success, error, and cancellation paths, so it's extracted out for convenience.\n      const cleanup = () => {\n        // Remove the <script> tag if it's still on the page.\n        if (node.parentNode) {\n          node.parentNode.removeChild(node);\n        }\n\n        // Remove the response callback from the callbackMap (window object in the\n        // browser).\n        delete this.callbackMap[callback];\n      };\n\n      // onLoad() is the success callback which runs after the response callback\n      // if the JSONP script loads successfully. The event itself is unimportant.\n      // If something went wrong, onLoad() may run without the response callback\n      // having been invoked.\n      const onLoad = (event: Event) => {\n        // Do nothing if the request has been cancelled.\n        if (cancelled) {\n          return;\n        }\n\n        // We wrap it in an extra Promise, to ensure the microtask\n        // is scheduled after the loaded endpoint has executed any potential microtask itself,\n        // which is not guaranteed in Internet Explorer and EdgeHTML. See issue #39496\n        this.resolvedPromise.then(() => {\n          // Cleanup the page.\n          cleanup();\n\n          // Check whether the response callback has run.\n          if (!finished) {\n            // It hasn't, something went wrong with the request. Return an error via\n            // the Observable error path. All JSONP errors have status 0.\n            observer.error(new HttpErrorResponse({\n              url,\n              status: 0,\n              statusText: 'JSONP Error',\n              error: new Error(JSONP_ERR_NO_CALLBACK),\n            }));\n            return;\n          }\n\n          // Success. body either contains the response body or null if none was\n          // returned.\n          observer.next(new HttpResponse({\n            body,\n            status: 200,\n            statusText: 'OK',\n            url,\n          }));\n\n          // Complete the stream, the response is over.\n          observer.complete();\n        });\n      };\n\n      // onError() is the error callback, which runs if the script returned generates\n      // a Javascript error. It emits the error via the Observable error channel as\n      // a HttpErrorResponse.\n      const onError: any = (error: Error) => {\n        // If the request was already cancelled, no need to emit anything.\n        if (cancelled) {\n          return;\n        }\n        cleanup();\n\n        // Wrap the error in a HttpErrorResponse.\n        observer.error(new HttpErrorResponse({\n          error,\n          status: 0,\n          statusText: 'JSONP Error',\n          url,\n        }));\n      };\n\n      // Subscribe to both the success (load) and error events on the <script> tag,\n      // and add it to the page.\n      node.addEventListener('load', onLoad);\n      node.addEventListener('error', onError);\n      this.document.body.appendChild(node);\n\n      // The request has now been successfully sent.\n      observer.next({type: HttpEventType.Sent});\n\n      // Cancellation handler.\n      return () => {\n        // Track the cancellation so event listeners won't do anything even if already scheduled.\n        cancelled = true;\n\n        // Remove the event listeners so they won't run if the events later fire.\n        node.removeEventListener('load', onLoad);\n        node.removeEventListener('error', onError);\n\n        // And finally, clean up the page.\n        cleanup();\n      };\n    });\n  }\n}\n\n/**\n * Identifies requests with the method JSONP and\n * shifts them to the `JsonpClientBackend`.\n *\n * @see `HttpInterceptor`\n *\n * @publicApi\n */\n@Injectable()\nexport class JsonpInterceptor {\n  constructor(private jsonp: JsonpClientBackend) {}\n\n  /**\n   * Identifies and handles a given JSONP request.\n   * @param req The outgoing request object to handle.\n   * @param next The next interceptor in the chain, or the backend\n   * if no interceptors remain in the chain.\n   * @returns An observable of the event stream.\n   */\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    if (req.method === 'JSONP') {\n      return this.jsonp.handle(req as HttpRequest<never>);\n    }\n    // Fall through for normal HTTP requests.\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Observable, Observer} from 'rxjs';\n\nimport {HttpBackend} from './backend';\nimport {HttpHeaders} from './headers';\nimport {HttpRequest} from './request';\nimport {HttpDownloadProgressEvent, HttpErrorResponse, HttpEvent, HttpEventType, HttpHeaderResponse, HttpJsonParseError, HttpResponse, HttpUploadProgressEvent} from './response';\n\nconst XSSI_PREFIX = /^\\)\\]\\}',?\\n/;\n\n/**\n * Determine an appropriate URL for the response, by checking either\n * XMLHttpRequest.responseURL or the X-Request-URL header.\n */\nfunction getResponseUrl(xhr: any): string|null {\n  if ('responseURL' in xhr && xhr.responseURL) {\n    return xhr.responseURL;\n  }\n  if (/^X-Request-URL:/m.test(xhr.getAllResponseHeaders())) {\n    return xhr.getResponseHeader('X-Request-URL');\n  }\n  return null;\n}\n\n/**\n * A wrapper around the `XMLHttpRequest` constructor.\n *\n * @publicApi\n */\nexport abstract class XhrFactory {\n  abstract build(): XMLHttpRequest;\n}\n\n/**\n * A factory for `HttpXhrBackend` that uses the `XMLHttpRequest` browser API.\n *\n */\n@Injectable()\nexport class BrowserXhr implements XhrFactory {\n  constructor() {}\n  build(): any {\n    return <any>(new XMLHttpRequest());\n  }\n}\n\n/**\n * Tracks a response from the server that does not yet have a body.\n */\ninterface PartialResponse {\n  headers: HttpHeaders;\n  status: number;\n  statusText: string;\n  url: string;\n}\n\n/**\n * Uses `XMLHttpRequest` to send requests to a backend server.\n * @see `HttpHandler`\n * @see `JsonpClientBackend`\n *\n * @publicApi\n */\n@Injectable()\nexport class HttpXhrBackend implements HttpBackend {\n  constructor(private xhrFactory: XhrFactory) {}\n\n  /**\n   * Processes a request and returns a stream of response events.\n   * @param req The request object.\n   * @returns An observable of the response events.\n   */\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    // Quick check to give a better error message when a user attempts to use\n    // HttpClient.jsonp() without installing the HttpClientJsonpModule\n    if (req.method === 'JSONP') {\n      throw new Error(\n          `Attempted to construct Jsonp request without HttpClientJsonpModule installed.`);\n    }\n\n    // Everything happens on Observable subscription.\n    return new Observable((observer: Observer<HttpEvent<any>>) => {\n      // Start by setting up the XHR object with request method, URL, and withCredentials flag.\n      const xhr = this.xhrFactory.build();\n      xhr.open(req.method, req.urlWithParams);\n      if (!!req.withCredentials) {\n        xhr.withCredentials = true;\n      }\n\n      // Add all the requested headers.\n      req.headers.forEach((name, values) => xhr.setRequestHeader(name, values.join(',')));\n\n      // Add an Accept header if one isn't present already.\n      if (!req.headers.has('Accept')) {\n        xhr.setRequestHeader('Accept', 'application/json, text/plain, */*');\n      }\n\n      // Auto-detect the Content-Type header if one isn't present already.\n      if (!req.headers.has('Content-Type')) {\n        const detectedType = req.detectContentTypeHeader();\n        // Sometimes Content-Type detection fails.\n        if (detectedType !== null) {\n          xhr.setRequestHeader('Content-Type', detectedType);\n        }\n      }\n\n      // Set the responseType if one was requested.\n      if (req.responseType) {\n        const responseType = req.responseType.toLowerCase();\n\n        // JSON responses need to be processed as text. This is because if the server\n        // returns an XSSI-prefixed JSON response, the browser will fail to parse it,\n        // xhr.response will be null, and xhr.responseText cannot be accessed to\n        // retrieve the prefixed JSON data in order to strip the prefix. Thus, all JSON\n        // is parsed by first requesting text and then applying JSON.parse.\n        xhr.responseType = ((responseType !== 'json') ? responseType : 'text') as any;\n      }\n\n      // Serialize the request body if one is present. If not, this will be set to null.\n      const reqBody = req.serializeBody();\n\n      // If progress events are enabled, response headers will be delivered\n      // in two events - the HttpHeaderResponse event and the full HttpResponse\n      // event. However, since response headers don't change in between these\n      // two events, it doesn't make sense to parse them twice. So headerResponse\n      // caches the data extracted from the response whenever it's first parsed,\n      // to ensure parsing isn't duplicated.\n      let headerResponse: HttpHeaderResponse|null = null;\n\n      // partialFromXhr extracts the HttpHeaderResponse from the current XMLHttpRequest\n      // state, and memoizes it into headerResponse.\n      const partialFromXhr = (): HttpHeaderResponse => {\n        if (headerResponse !== null) {\n          return headerResponse;\n        }\n\n        // Read status and normalize an IE9 bug (https://bugs.jquery.com/ticket/1450).\n        const status: number = xhr.status === 1223 ? 204 : xhr.status;\n        const statusText = xhr.statusText || 'OK';\n\n        // Parse headers from XMLHttpRequest - this step is lazy.\n        const headers = new HttpHeaders(xhr.getAllResponseHeaders());\n\n        // Read the response URL from the XMLHttpResponse instance and fall back on the\n        // request URL.\n        const url = getResponseUrl(xhr) || req.url;\n\n        // Construct the HttpHeaderResponse and memoize it.\n        headerResponse = new HttpHeaderResponse({headers, status, statusText, url});\n        return headerResponse;\n      };\n\n      // Next, a few closures are defined for the various events which XMLHttpRequest can\n      // emit. This allows them to be unregistered as event listeners later.\n\n      // First up is the load event, which represents a response being fully available.\n      const onLoad = () => {\n        // Read response state from the memoized partial data.\n        let {headers, status, statusText, url} = partialFromXhr();\n\n        // The body will be read out if present.\n        let body: any|null = null;\n\n        if (status !== 204) {\n          // Use XMLHttpRequest.response if set, responseText otherwise.\n          body = (typeof xhr.response === 'undefined') ? xhr.responseText : xhr.response;\n        }\n\n        // Normalize another potential bug (this one comes from CORS).\n        if (status === 0) {\n          status = !!body ? 200 : 0;\n        }\n\n        // ok determines whether the response will be transmitted on the event or\n        // error channel. Unsuccessful status codes (not 2xx) will always be errors,\n        // but a successful status code can still result in an error if the user\n        // asked for JSON data and the body cannot be parsed as such.\n        let ok = status >= 200 && status < 300;\n\n        // Check whether the body needs to be parsed as JSON (in many cases the browser\n        // will have done that already).\n        if (req.responseType === 'json' && typeof body === 'string') {\n          // Save the original body, before attempting XSSI prefix stripping.\n          const originalBody = body;\n          body = body.replace(XSSI_PREFIX, '');\n          try {\n            // Attempt the parse. If it fails, a parse error should be delivered to the user.\n            body = body !== '' ? JSON.parse(body) : null;\n          } catch (error) {\n            // Since the JSON.parse failed, it's reasonable to assume this might not have been a\n            // JSON response. Restore the original body (including any XSSI prefix) to deliver\n            // a better error response.\n            body = originalBody;\n\n            // If this was an error request to begin with, leave it as a string, it probably\n            // just isn't JSON. Otherwise, deliver the parsing error to the user.\n            if (ok) {\n              // Even though the response status was 2xx, this is still an error.\n              ok = false;\n              // The parse error contains the text of the body that failed to parse.\n              body = {error, text: body} as HttpJsonParseError;\n            }\n          }\n        }\n\n        if (ok) {\n          // A successful response is delivered on the event stream.\n          observer.next(new HttpResponse({\n            body,\n            headers,\n            status,\n            statusText,\n            url: url || undefined,\n          }));\n          // The full body has been received and delivered, no further events\n          // are possible. This request is complete.\n          observer.complete();\n        } else {\n          // An unsuccessful request is delivered on the error channel.\n          observer.error(new HttpErrorResponse({\n            // The error in this case is the response body (error from the server).\n            error: body,\n            headers,\n            status,\n            statusText,\n            url: url || undefined,\n          }));\n        }\n      };\n\n      // The onError callback is called when something goes wrong at the network level.\n      // Connection timeout, DNS error, offline, etc. These are actual errors, and are\n      // transmitted on the error channel.\n      const onError = (error: ProgressEvent) => {\n        const {url} = partialFromXhr();\n        const res = new HttpErrorResponse({\n          error,\n          status: xhr.status || 0,\n          statusText: xhr.statusText || 'Unknown Error',\n          url: url || undefined,\n        });\n        observer.error(res);\n      };\n\n      // The sentHeaders flag tracks whether the HttpResponseHeaders event\n      // has been sent on the stream. This is necessary to track if progress\n      // is enabled since the event will be sent on only the first download\n      // progerss event.\n      let sentHeaders = false;\n\n      // The download progress event handler, which is only registered if\n      // progress events are enabled.\n      const onDownProgress = (event: ProgressEvent) => {\n        // Send the HttpResponseHeaders event if it hasn't been sent already.\n        if (!sentHeaders) {\n          observer.next(partialFromXhr());\n          sentHeaders = true;\n        }\n\n        // Start building the download progress event to deliver on the response\n        // event stream.\n        let progressEvent: HttpDownloadProgressEvent = {\n          type: HttpEventType.DownloadProgress,\n          loaded: event.loaded,\n        };\n\n        // Set the total number of bytes in the event if it's available.\n        if (event.lengthComputable) {\n          progressEvent.total = event.total;\n        }\n\n        // If the request was for text content and a partial response is\n        // available on XMLHttpRequest, include it in the progress event\n        // to allow for streaming reads.\n        if (req.responseType === 'text' && !!xhr.responseText) {\n          progressEvent.partialText = xhr.responseText;\n        }\n\n        // Finally, fire the event.\n        observer.next(progressEvent);\n      };\n\n      // The upload progress event handler, which is only registered if\n      // progress events are enabled.\n      const onUpProgress = (event: ProgressEvent) => {\n        // Upload progress events are simpler. Begin building the progress\n        // event.\n        let progress: HttpUploadProgressEvent = {\n          type: HttpEventType.UploadProgress,\n          loaded: event.loaded,\n        };\n\n        // If the total number of bytes being uploaded is available, include\n        // it.\n        if (event.lengthComputable) {\n          progress.total = event.total;\n        }\n\n        // Send the event.\n        observer.next(progress);\n      };\n\n      // By default, register for load and error events.\n      xhr.addEventListener('load', onLoad);\n      xhr.addEventListener('error', onError);\n      xhr.addEventListener('timeout', onError);\n      xhr.addEventListener('abort', onError);\n\n      // Progress events are only enabled if requested.\n      if (req.reportProgress) {\n        // Download progress is always enabled if requested.\n        xhr.addEventListener('progress', onDownProgress);\n\n        // Upload progress depends on whether there is a body to upload.\n        if (reqBody !== null && xhr.upload) {\n          xhr.upload.addEventListener('progress', onUpProgress);\n        }\n      }\n\n      // Fire the request, and notify the event stream that it was fired.\n      xhr.send(reqBody!);\n      observer.next({type: HttpEventType.Sent});\n\n      // This is the return from the Observable function, which is the\n      // request cancellation handler.\n      return () => {\n        // On a cancellation, remove all registered event listeners.\n        xhr.removeEventListener('error', onError);\n        xhr.removeEventListener('abort', onError);\n        xhr.removeEventListener('load', onLoad);\n        xhr.removeEventListener('timeout', onError);\n        if (req.reportProgress) {\n          xhr.removeEventListener('progress', onDownProgress);\n          if (reqBody !== null && xhr.upload) {\n            xhr.upload.removeEventListener('progress', onUpProgress);\n          }\n        }\n\n        // Finally, abort the in-flight request.\n        if (xhr.readyState !== xhr.DONE) {\n          xhr.abort();\n        }\n      };\n    });\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {DOCUMENT, ɵparseCookieValue as parseCookieValue} from '@angular/common';\nimport {Inject, Injectable, InjectionToken, PLATFORM_ID} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpHandler} from './backend';\nimport {HttpInterceptor} from './interceptor';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\n\nexport const XSRF_COOKIE_NAME = new InjectionToken<string>('XSRF_COOKIE_NAME');\nexport const XSRF_HEADER_NAME = new InjectionToken<string>('XSRF_HEADER_NAME');\n\n/**\n * Retrieves the current XSRF token to use with the next outgoing request.\n *\n * @publicApi\n */\nexport abstract class HttpXsrfTokenExtractor {\n  /**\n   * Get the XSRF token to use with an outgoing request.\n   *\n   * Will be called for every request, so the token may change between requests.\n   */\n  abstract getToken(): string|null;\n}\n\n/**\n * `HttpXsrfTokenExtractor` which retrieves the token from a cookie.\n */\n@Injectable()\nexport class HttpXsrfCookieExtractor implements HttpXsrfTokenExtractor {\n  private lastCookieString: string = '';\n  private lastToken: string|null = null;\n\n  /**\n   * @internal for testing\n   */\n  parseCount: number = 0;\n\n  constructor(\n      @Inject(DOCUMENT) private doc: any, @Inject(PLATFORM_ID) private platform: string,\n      @Inject(XSRF_COOKIE_NAME) private cookieName: string) {}\n\n  getToken(): string|null {\n    if (this.platform === 'server') {\n      return null;\n    }\n    const cookieString = this.doc.cookie || '';\n    if (cookieString !== this.lastCookieString) {\n      this.parseCount++;\n      this.lastToken = parseCookieValue(cookieString, this.cookieName);\n      this.lastCookieString = cookieString;\n    }\n    return this.lastToken;\n  }\n}\n\n/**\n * `HttpInterceptor` which adds an XSRF token to eligible outgoing requests.\n */\n@Injectable()\nexport class HttpXsrfInterceptor implements HttpInterceptor {\n  constructor(\n      private tokenService: HttpXsrfTokenExtractor,\n      @Inject(XSRF_HEADER_NAME) private headerName: string) {}\n\n  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {\n    const lcUrl = req.url.toLowerCase();\n    // Skip both non-mutating requests and absolute URLs.\n    // Non-mutating requests don't require a token, and absolute URLs require special handling\n    // anyway as the cookie set\n    // on our origin is not the same as the token expected by another origin.\n    if (req.method === 'GET' || req.method === 'HEAD' || lcUrl.startsWith('http://') ||\n        lcUrl.startsWith('https://')) {\n      return next.handle(req);\n    }\n    const token = this.tokenService.getToken();\n\n    // Be careful not to overwrite an existing header of the same name.\n    if (token !== null && !req.headers.has(this.headerName)) {\n      req = req.clone({headers: req.headers.set(this.headerName, token)});\n    }\n    return next.handle(req);\n  }\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable, Injector, ModuleWithProviders, NgModule} from '@angular/core';\nimport {Observable} from 'rxjs';\n\nimport {HttpBackend, HttpHandler} from './backend';\nimport {HttpClient} from './client';\nimport {HTTP_INTERCEPTORS, HttpInterceptor, HttpInterceptorHandler, NoopInterceptor} from './interceptor';\nimport {JsonpCallbackContext, JsonpClientBackend, JsonpInterceptor} from './jsonp';\nimport {HttpRequest} from './request';\nimport {HttpEvent} from './response';\nimport {BrowserXhr, HttpXhrBackend, XhrFactory} from './xhr';\nimport {HttpXsrfCookieExtractor, HttpXsrfInterceptor, HttpXsrfTokenExtractor, XSRF_COOKIE_NAME, XSRF_HEADER_NAME} from './xsrf';\n\n/**\n * An injectable `HttpHandler` that applies multiple interceptors\n * to a request before passing it to the given `HttpBackend`.\n *\n * The interceptors are loaded lazily from the injector, to allow\n * interceptors to themselves inject classes depending indirectly\n * on `HttpInterceptingHandler` itself.\n * @see `HttpInterceptor`\n */\n@Injectable()\nexport class HttpInterceptingHandler implements HttpHandler {\n  private chain: HttpHandler|null = null;\n\n  constructor(private backend: HttpBackend, private injector: Injector) {}\n\n  handle(req: HttpRequest<any>): Observable<HttpEvent<any>> {\n    if (this.chain === null) {\n      const interceptors = this.injector.get(HTTP_INTERCEPTORS, []);\n      this.chain = interceptors.reduceRight(\n          (next, interceptor) => new HttpInterceptorHandler(next, interceptor), this.backend);\n    }\n    return this.chain.handle(req);\n  }\n}\n\n/**\n * Constructs an `HttpHandler` that applies interceptors\n * to a request before passing it to the given `HttpBackend`.\n *\n * Use as a factory function within `HttpClientModule`.\n *\n *\n */\nexport function interceptingHandler(\n    backend: HttpBackend, interceptors: HttpInterceptor[]|null = []): HttpHandler {\n  if (!interceptors) {\n    return backend;\n  }\n  return interceptors.reduceRight(\n      (next, interceptor) => new HttpInterceptorHandler(next, interceptor), backend);\n}\n\n/**\n * Factory function that determines where to store JSONP callbacks.\n *\n * Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist\n * in test environments. In that case, callbacks are stored on an anonymous object instead.\n *\n *\n */\nexport function jsonpCallbackContext(): Object {\n  if (typeof window === 'object') {\n    return window;\n  }\n  return {};\n}\n\n/**\n * Configures XSRF protection support for outgoing requests.\n *\n * For a server that supports a cookie-based XSRF protection system,\n * use directly to configure XSRF protection with the correct\n * cookie and header names.\n *\n * If no names are supplied, the default cookie name is `XSRF-TOKEN`\n * and the default header name is `X-XSRF-TOKEN`.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [\n    HttpXsrfInterceptor,\n    {provide: HTTP_INTERCEPTORS, useExisting: HttpXsrfInterceptor, multi: true},\n    {provide: HttpXsrfTokenExtractor, useClass: HttpXsrfCookieExtractor},\n    {provide: XSRF_COOKIE_NAME, useValue: 'XSRF-TOKEN'},\n    {provide: XSRF_HEADER_NAME, useValue: 'X-XSRF-TOKEN'},\n  ],\n})\nexport class HttpClientXsrfModule {\n  /**\n   * Disable the default XSRF protection.\n   */\n  static disable(): ModuleWithProviders<HttpClientXsrfModule> {\n    return {\n      ngModule: HttpClientXsrfModule,\n      providers: [\n        {provide: HttpXsrfInterceptor, useClass: NoopInterceptor},\n      ],\n    };\n  }\n\n  /**\n   * Configure XSRF protection.\n   * @param options An object that can specify either or both\n   * cookie name or header name.\n   * - Cookie name default is `XSRF-TOKEN`.\n   * - Header name default is `X-XSRF-TOKEN`.\n   *\n   */\n  static withOptions(options: {\n    cookieName?: string,\n    headerName?: string,\n  } = {}): ModuleWithProviders<HttpClientXsrfModule> {\n    return {\n      ngModule: HttpClientXsrfModule,\n      providers: [\n        options.cookieName ? {provide: XSRF_COOKIE_NAME, useValue: options.cookieName} : [],\n        options.headerName ? {provide: XSRF_HEADER_NAME, useValue: options.headerName} : [],\n      ],\n    };\n  }\n}\n\n/**\n * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`\n * with supporting services for XSRF. Automatically imported by `HttpClientModule`.\n *\n * You can add interceptors to the chain behind `HttpClient` by binding them to the\n * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.\n *\n * @publicApi\n */\n@NgModule({\n  /**\n   * Optional configuration for XSRF protection.\n   */\n  imports: [\n    HttpClientXsrfModule.withOptions({\n      cookieName: 'XSRF-TOKEN',\n      headerName: 'X-XSRF-TOKEN',\n    }),\n  ],\n  /**\n   * Configures the [dependency injector](guide/glossary#injector) where it is imported\n   * with supporting services for HTTP communications.\n   */\n  providers: [\n    HttpClient,\n    {provide: HttpHandler, useClass: HttpInterceptingHandler},\n    HttpXhrBackend,\n    {provide: HttpBackend, useExisting: HttpXhrBackend},\n    BrowserXhr,\n    {provide: XhrFactory, useExisting: BrowserXhr},\n  ],\n})\nexport class HttpClientModule {\n}\n\n/**\n * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`\n * with supporting services for JSONP.\n * Without this module, Jsonp requests reach the backend\n * with method JSONP, where they are rejected.\n *\n * You can add interceptors to the chain behind `HttpClient` by binding them to the\n * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.\n *\n * @publicApi\n */\n@NgModule({\n  providers: [\n    JsonpClientBackend,\n    {provide: JsonpCallbackContext, useFactory: jsonpCallbackContext},\n    {provide: HTTP_INTERCEPTORS, useClass: JsonpInterceptor, multi: true},\n  ],\n})\nexport class HttpClientJsonpModule {\n}\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nexport {HttpBackend, HttpHandler} from './src/backend';\nexport {HttpClient} from './src/client';\nexport {HttpHeaders} from './src/headers';\nexport {HTTP_INTERCEPTORS, HttpInterceptor} from './src/interceptor';\nexport {JsonpClientBackend, JsonpInterceptor} from './src/jsonp';\nexport {HttpClientJsonpModule, HttpClientModule, HttpClientXsrfModule, HttpInterceptingHandler as ɵHttpInterceptingHandler} from './src/module';\nexport {HttpParameterCodec, HttpParams, HttpParamsOptions, HttpUrlEncodingCodec} from './src/params';\nexport {HttpRequest} from './src/request';\nexport {HttpDownloadProgressEvent, HttpErrorResponse, HttpEvent, HttpEventType, HttpHeaderResponse, HttpProgressEvent, HttpResponse, HttpResponseBase, HttpSentEvent, HttpUploadProgressEvent, HttpUserEvent} from './src/response';\nexport {HttpXhrBackend, XhrFactory} from './src/xhr';\nexport {HttpXsrfTokenExtractor} from './src/xsrf';\n","/**\n * @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\n// This file is not used to build this module. 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