mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-26 17:46:26 +03:00
Aaron Vaage
3db0f3357a
To better support alternate storage mechanisms, this change abstracts shaka.offline.DBEngine into an interface called shaka.offline.IStorageEngine. DBEngine has been changed to implement this interface, and allows the addition of implementations that do not use IndexedDB. Change-Id: I6a94067001ee53049df11cb68604bb57912300bb
79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.offline.OfflineScheme');
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goog.require('shaka.net.NetworkingEngine');
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goog.require('shaka.offline.OfflineUtils');
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goog.require('shaka.util.Error');
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/**
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* @namespace
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* @summary A plugin that handles requests for offline content.
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* @param {string} uri
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* @param {shakaExtern.Request} request
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* @return {!Promise.<shakaExtern.Response>}
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* @export
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*/
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shaka.offline.OfflineScheme = function(uri, request) {
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var manifestParts = /^offline:([0-9]+)$/.exec(uri);
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if (manifestParts) {
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/** @type {shakaExtern.Response} */
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var response = {
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uri: uri,
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data: new ArrayBuffer(0),
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headers: {'content-type': 'application/x-offline-manifest'}
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};
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return Promise.resolve(response);
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}
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var segmentParts = /^offline:[0-9]+\/[0-9]+\/([0-9]+)$/.exec(uri);
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if (segmentParts) {
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var segmentId = Number(segmentParts[1]);
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var scheme = shaka.offline.OfflineUtils.DB_SCHEME;
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var storageEngine = shaka.offline.OfflineUtils.createStorageEngine();
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if (!storageEngine) {
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return Promise.reject(new shaka.util.Error(
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shaka.util.Error.Category.STORAGE,
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shaka.util.Error.Code.STORAGE_NOT_SUPPORTED));
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}
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return storageEngine.init(scheme)
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.then(function() { return storageEngine.get('segment', segmentId); })
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.then(function(segment) {
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return storageEngine.destroy().then(function() {
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if (!segment) {
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throw new shaka.util.Error(
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shaka.util.Error.Category.STORAGE,
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shaka.util.Error.Code.REQUESTED_ITEM_NOT_FOUND, segmentId);
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}
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return {uri: uri, data: segment.data, headers: {}};
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});
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});
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}
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return Promise.reject(new shaka.util.Error(
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shaka.util.Error.Category.NETWORK,
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shaka.util.Error.Code.MALFORMED_OFFLINE_URI, uri));
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};
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shaka.net.NetworkingEngine.registerScheme(
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'offline', shaka.offline.OfflineScheme);
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