Function Body

fetch.js:222–340

()

}

function Body() {
  this.bodyUsed = false

  this._initBody = function(body) {
    /*
      fetch-mock wraps the Response object in an ES6 Proxy to
      provide useful test harness features such as flush. However, on
      ES5 browsers without fetch or Proxy support pollyfills must be used;
      the proxy-pollyfill is unable to proxy an attribute unless it exists
      on the object before the Proxy is created. This change ensures
      Response.bodyUsed exists on the instance, while maintaining the
      semantic of setting Request.bodyUsed in the constructor before
      _initBody is called.
    */
    // eslint-disable-next-line no-self-assign
    this.bodyUsed = this.bodyUsed
    this._bodyInit = body
    if (!body) {
      this._noBody = true;
      this._bodyText = ''
    } else if (typeof body === 'string') {
      this._bodyText = body
    } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
      this._bodyBlob = body
    } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
      this._bodyFormData = body
    } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
      this._bodyText = body.toString()
    } else if (support.arrayBuffer && support.blob && isDataView(body)) {
      this._bodyArrayBuffer = bufferClone(body.buffer)
      // IE 10-11 can't handle a DataView body.
      this._bodyInit = new Blob([this._bodyArrayBuffer])
    } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
      this._bodyArrayBuffer = bufferClone(body)
    } else {
      this._bodyText = body = Object.prototype.toString.call(body)
    }

    if (!this.headers.get('content-type')) {
      if (typeof body === 'string') {
        this.headers.set('content-type', 'text/plain;charset=UTF-8')
      } else if (this._bodyBlob && this._bodyBlob.type) {
        this.headers.set('content-type', this._bodyBlob.type)
      } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
        this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8')
      }
    }
  }

  if (support.blob) {
    this.blob = function() {
      var rejected = consumed(this)
      if (rejected) {
        return rejected
      }

      if (this._bodyBlob) {
        return Promise.resolve(this._bodyBlob)