CDMStorageIdProvider.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef CDMStorageIdProvider_h_

#define CDMStorageIdProvider_h_

/**

 * CDM will try to request a latest version(0) of storage id.

 * If the storage id computation algorithm changed, we should increase the

 * kCurrentVersion.

*/

#include <string>

#include "nsString.h"

namespace mozilla {

class CDMStorageIdProvider {

  static constexpr const char* kBrowserIdentifier = "mozilla_firefox_gecko";

 public:

  // Should increase the value when the storage id algorithm changed.

  static constexpr int kCurrentVersion = 1;

  static constexpr int kCDMRequestLatestVersion = 0;

  // Return empty string when

  // 1. Call on unsupported storageid platform.

  // 2. Failed to compute the storage id.

  // This function only provide the storage id for kCurrentVersion=1.

  // If you want to change the algorithm or output of storageid,

  // you should keep the version 1 storage id and consider to provide

  // higher version storage id in another function.

  static nsCString ComputeStorageId(const nsCString& aOriginSalt);

};

}  // namespace mozilla

#endif  // CDMStorageIdProvider_h_