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.log');
  10. goog.require('shaka.polyfill');
  11. goog.require('shaka.util.Platform');
  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.     // eslint-disable-next-line no-restricted-syntax
  30.     if (MediaKeys.prototype.setServerCertificate &&
  31.         !shaka.polyfill.PatchedMediaKeysCert.hasInvalidImplementation_()) {
  32.       // setServerCertificate is there and userAgent seems to be valid.
  33.       return;
  34.     }
  36.     shaka.log.info('Patching MediaKeys.setServerCertificate');
  37.     // eslint-disable-next-line no-restricted-syntax
  38.     MediaKeys.prototype.setServerCertificate =
  39.       shaka.polyfill.PatchedMediaKeysCert.setServerCertificate_;
  40.   }
  42.   /**
  43.    * @param {!BufferSource} certificate
  44.    * @return {!Promise<boolean>}
  45.    * @private
  46.    */
  47.   static setServerCertificate_(certificate) {
  48.     shaka.log.debug('PatchedMediaKeysCert.setServerCertificate');
  49.     return Promise.resolve(false);
  50.   }
  52.   /**
  53.    * @return {boolean}
  54.    * @private
  55.    */
  56.   static hasInvalidImplementation_() {
  57.     return shaka.util.Platform.isTizen3() || shaka.util.Platform.isTizen4() ||
  58.       shaka.util.Platform.isTizen5_0() || shaka.util.Platform.isWebOS3();
  59.   }
  60. };
  62. shaka.polyfill.register(shaka.polyfill.PatchedMediaKeysCert.install);