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bufferClone(buf) {\n    if (buf.slice) {\n      return buf.slice(0)\n    } else {\n      var view = new Uint8Array(buf.byteLength);\n      view.set(new Uint8Array(buf));\n      return view.buffer\n    }\n  }\n\n  function Body() {\n    this.bodyUsed = false;\n\n    this._initBody = function(body) {\n      this._bodyInit = body;\n      if (!body) {\n        this._bodyText = '';\n      } else if (typeof body === 'string') {\n        this._bodyText = body;\n      } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {\n        this._bodyBlob = body;\n      } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {\n        this._bodyFormData = body;\n      } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {\n        this._bodyText = body.toString();\n      } else if (support.arrayBuffer && support.blob && isDataView(body)) {\n        this._bodyArrayBuffer = bufferClone(body.buffer);\n        // IE 10-11 can't handle a DataView body.\n        this._bodyInit = new Blob([this._bodyArrayBuffer]);\n      } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {\n        this._bodyArrayBuffer = bufferClone(body);\n      } else {\n        throw new Error('unsupported BodyInit type')\n      }\n\n      if (!this.headers.get('content-type')) {\n        if (typeof body === 'string') {\n          this.headers.set('content-type', 'text/plain;charset=UTF-8');\n        } else if (this._bodyBlob && this._bodyBlob.type) {\n          this.headers.set('content-type', this._bodyBlob.type);\n        } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {\n          this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');\n        }\n      }\n    };\n\n    if (support.blob) {\n      this.blob = function() {\n        var rejected = consumed(this);\n        if (rejected) {\n          return rejected\n        }\n\n        if (this._bodyBlob) {\n          return Promise.resolve(this._bodyBlob)\n        } else if (this._bodyArrayBuffer) {\n          return Promise.resolve(new Blob([this._bodyArrayBuffer]))\n        } else if (this._bodyFormData) {\n          throw new Error('could not read FormData body as blob')\n        } else {\n          return Promise.resolve(new Blob([this._bodyText]))\n        }\n      };\n\n      this.arrayBuffer = function() {\n        if (this._bodyArrayBuffer) {\n          return consumed(this) || Promise.resolve(this._bodyArrayBuffer)\n        } else {\n          return this.blob().then(readBlobAsArrayBuffer)\n        }\n      };\n    }\n\n    this.text = function() {\n      var rejected = consumed(this);\n      if (rejected) {\n        return rejected\n      }\n\n      if (this._bodyBlob) {\n        return readBlobAsText(this._bodyBlob)\n      } else if (this._bodyArrayBuffer) {\n        return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))\n      } else if (this._bodyFormData) {\n        throw new Error('could not read FormData body as text')\n      } else {\n        return Promise.resolve(this._bodyText)\n      }\n    };\n\n    if (support.formData) {\n      this.formData = function() {\n        return this.text().then(decode)\n      };\n    }\n\n    this.json = function() {\n      return this.text().then(JSON.parse)\n    };\n\n    return this\n  }\n\n  // HTTP methods whose capitalization should be normalized\n  var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];\n\n  function normalizeMethod(method) {\n    var upcased = method.toUpperCase();\n    return (methods.indexOf(upcased) > -1) ? upcased : method\n  }\n\n  function Request(input, options) {\n    options = options || {};\n    var body = options.body;\n\n    if (input instanceof Request) {\n      if (input.bodyUsed) {\n        throw new TypeError('Already read')\n      }\n      this.url = input.url;\n      this.credentials = input.credentials;\n      if (!options.headers) {\n        this.headers = new Headers(input.headers);\n      }\n      this.method = input.method;\n      this.mode = input.mode;\n      if (!body && input._bodyInit != null) {\n        body = input._bodyInit;\n        input.bodyUsed = true;\n      }\n    } else {\n      this.url = String(input);\n    }\n\n    this.credentials = options.credentials || this.credentials || 'omit';\n    if (options.headers || !this.headers) {\n      this.headers = new Headers(options.headers);\n    }\n    this.method = normalizeMethod(options.method || this.method || 'GET');\n    this.mode = options.mode || this.mode || null;\n    this.referrer = null;\n\n    if ((this.method === 'GET' || this.method === 'HEAD') && body) {\n      throw new TypeError('Body not allowed for GET or HEAD requests')\n    }\n    this._initBody(body);\n  }\n\n  Request.prototype.clone = function() {\n    return new Request(this, { body: this._bodyInit })\n  };\n\n  function decode(body) {\n    var form = new FormData();\n    body.trim().split('&').forEach(function(bytes) {\n      if (bytes) {\n        var split = bytes.split('=');\n        var name = split.shift().replace(/\\+/g, ' ');\n        var value = split.join('=').replace(/\\+/g, ' ');\n        form.append(decodeURIComponent(name), decodeURIComponent(value));\n      }\n    });\n    return form\n  }\n\n  function parseHeaders(rawHeaders) {\n    var headers = new Headers();\n    rawHeaders.split(/\\r?\\n/).forEach(function(line) {\n      var parts = line.split(':');\n      var key = parts.shift().trim();\n      if (key) {\n        var value = parts.join(':').trim();\n        headers.append(key, value);\n      }\n    });\n    return headers\n  }\n\n  Body.call(Request.prototype);\n\n  function Response(bodyInit, options) {\n    if (!options) {\n      options = {};\n    }\n\n    this.type = 'default';\n    this.status = 'status' in options ? options.status : 200;\n    this.ok = this.status >= 200 && this.status < 300;\n    this.statusText = 'statusText' in options ? options.statusText : 'OK';\n    this.headers = new Headers(options.headers);\n    this.url = options.url || '';\n    this._initBody(bodyInit);\n  }\n\n  Body.call(Response.prototype);\n\n  Response.prototype.clone = function() {\n    return new Response(this._bodyInit, {\n      status: this.status,\n      statusText: this.statusText,\n      headers: new Headers(this.headers),\n      url: this.url\n    })\n  };\n\n  Response.error = function() {\n    var response = new Response(null, {status: 0, statusText: ''});\n    response.type = 'error';\n    return response\n  };\n\n  var redirectStatuses = [301, 302, 303, 307, 308];\n\n  Response.redirect = function(url, status) {\n    if (redirectStatuses.indexOf(status) === -1) {\n      throw new RangeError('Invalid status code')\n    }\n\n    return new Response(null, {status: status, headers: {location: url}})\n  };\n\n  self.Headers = Headers;\n  self.Request = Request;\n  self.Response = Response;\n\n  self.fetch = function(input, init) {\n    return new Promise(function(resolve, reject) {\n      var request = new Request(input, init);\n      var xhr = new XMLHttpRequest();\n\n      xhr.onload = function() {\n        var options = {\n          status: xhr.status,\n          statusText: xhr.statusText,\n          headers: parseHeaders(xhr.getAllResponseHeaders() || '')\n        };\n        options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');\n        var body = 'response' in xhr ? xhr.response : xhr.responseText;\n        resolve(new Response(body, options));\n      };\n\n      xhr.onerror = function() {\n        reject(new TypeError('Network request failed'));\n      };\n\n      xhr.ontimeout = function() {\n        reject(new TypeError('Network request failed'));\n      };\n\n      xhr.open(request.method, request.url, true);\n\n      if (request.credentials === 'include') {\n        xhr.withCredentials = true;\n      }\n\n      if ('responseType' in xhr && support.blob) {\n        xhr.responseType = 'blob';\n      }\n\n      request.headers.forEach(function(value, name) {\n        xhr.setRequestHeader(name, value);\n      });\n\n      xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);\n    })\n  };\n  self.fetch.polyfill = true;\n})(typeof self !== 'undefined' ? self : this);\n\n/*\n * Rollup wraps up the whatwg-fetch code on ponyfill mode in\n * order to prevent it from adding fetch to the global object.\n */\n\n      var fetch = self.fetch;\n\n      fetch.fetch = fetch;\n      fetch.Response = self.Response;\n      fetch.Headers = self.Headers;\n      fetch.Request = self.Request;\n\n      // fetch now can be imported as the default object\n      module.exports = fetch;\n    \n"],"sourceRoot":""}