Method serializeBody

packages/common/http/src/request.ts:442–472

* Transform the free-form body into a serialized format suitable for * transmission to the server.

()

   * transmission to the server.
   */
  serializeBody(): ArrayBuffer | Blob | FormData | URLSearchParams | string | null {
    // If no body is present, no need to serialize it.
    if (this.body === null) {
      return null;
    }
    // Check whether the body is already in a serialized form. If so,
    // it can just be returned directly.
    if (
      typeof this.body === 'string' ||
      isArrayBuffer(this.body) ||
      isBlob(this.body) ||
      isFormData(this.body) ||
      isUrlSearchParams(this.body)
    ) {
      return this.body;
    }
    // Check whether the body is an instance of HttpUrlEncodedParams.
    if (this.body instanceof HttpParams) {
      return this.body.toString();
    }
    // Check whether the body is an object or array, and serialize with JSON if so.
    if (
      typeof this.body === 'object' ||
      typeof this.body === 'boolean' ||
      Array.isArray(this.body)
    ) {
      return JSON.stringify(this.body);
    }
    // Fall back on toString() for everything else.
    return (this.body as any).toString();
  }

  /**
   * Examine the body and attempt to infer an appropriate MIME type