Source: lib/polyfill/patchedmediakeys_cert.js

  1. /*! @license
  2.  * Shaka Player
  3.  * Copyright 2016 Google LLC
  4.  * SPDX-License-Identifier: Apache-2.0
  5.  */
  7. goog.provide('shaka.polyfill.PatchedMediaKeysCert');
  9. goog.require('shaka.device.DeviceFactory');
  10. goog.require('shaka.log');
  11. goog.require('shaka.polyfill');
  14. /**
  15.  * @summary A polyfill to fix setServerCertificate implementation on
  16.  * older platforms which claim to support modern EME.
  17.  * @export
  18.  */
  19. shaka.polyfill.PatchedMediaKeysCert = class {
  20.   /**
  21.    * Installs the polyfill if needed.
  22.    * @export
  23.    */
  24.   static install() {
  25.     if (!window.MediaKeys) {
  26.       // No MediaKeys available
  27.       return;
  28.     }
  29.     const device = shaka.device.DeviceFactory.getDevice();
  30.     // eslint-disable-next-line no-restricted-syntax
  31.     if (MediaKeys.prototype.setServerCertificate &&
  32.         device.supportsServerCertificate()) {
  33.       // setServerCertificate is there and userAgent seems to be valid.
  34.       return;
  35.     }
  37.     shaka.log.info('Patching MediaKeys.setServerCertificate');
  38.     // eslint-disable-next-line no-restricted-syntax
  39.     MediaKeys.prototype.setServerCertificate =
  40.       shaka.polyfill.PatchedMediaKeysCert.setServerCertificate_;
  41.   }
  43.   /**
  44.    * @param {!BufferSource} certificate
  45.    * @return {!Promise<boolean>}
  46.    * @private
  47.    */
  48.   static setServerCertificate_(certificate) {
  49.     shaka.log.debug('PatchedMediaKeysCert.setServerCertificate');
  50.     return Promise.resolve(false);
  51.   }
  52. };
  54. shaka.polyfill.register(shaka.polyfill.PatchedMediaKeysCert.install);