All files / helpers array-buffer-to-base64.ts

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/**
 * Copyright 2017 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function toBase64(arrayBuffer) {
  const uint8Version = new Uint8Array(arrayBuffer);
  return window.btoa(String.fromCharCode.apply(null, uint8Version));
}
 
export default arrayBuffer => {
  const base64String = toBase64(arrayBuffer);
  return base64String
    .replace(/=/g, '')
    .replace(/\+/g, '-')
    .replace(/\//g, '_');
};