gecko-dev/dom/cache/CacheStorageParent.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */

#include "mozilla/dom/cache/CacheStorageParent.h"

#include "mozilla/Unused.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/cache/ActorUtils.h"
#include "mozilla/dom/cache/CacheOpParent.h"
#include "mozilla/dom/cache/ManagerId.h"
#include "mozilla/ipc/PBackgroundParent.h"

namespace mozilla {
namespace dom {
namespace cache {

using mozilla::ipc::PBackgroundParent;
using mozilla::ipc::PrincipalInfo;

// declared in ActorUtils.h
PCacheStorageParent*
AllocPCacheStorageParent(PBackgroundParent* aManagingActor,
                         Namespace aNamespace,
                         const mozilla::ipc::PrincipalInfo& aPrincipalInfo)
{
  return new CacheStorageParent(aManagingActor, aNamespace, aPrincipalInfo);
}

// declared in ActorUtils.h
void
DeallocPCacheStorageParent(PCacheStorageParent* aActor)
{
  delete aActor;
}

CacheStorageParent::CacheStorageParent(PBackgroundParent* aManagingActor,
                                       Namespace aNamespace,
                                       const PrincipalInfo& aPrincipalInfo)
  : mNamespace(aNamespace)
  , mVerifiedStatus(NS_OK)
{
  MOZ_COUNT_CTOR(cache::CacheStorageParent);
  MOZ_DIAGNOSTIC_ASSERT(aManagingActor);

  // Start the async principal verification process immediately.
  mVerifier = PrincipalVerifier::CreateAndDispatch(this, aManagingActor,
                                                   aPrincipalInfo);
  MOZ_DIAGNOSTIC_ASSERT(mVerifier);
}

CacheStorageParent::~CacheStorageParent()
{
  MOZ_COUNT_DTOR(cache::CacheStorageParent);
  MOZ_DIAGNOSTIC_ASSERT(!mVerifier);
}

void
CacheStorageParent::ActorDestroy(ActorDestroyReason aReason)
{
  if (mVerifier) {
    mVerifier->RemoveListener(this);
    mVerifier = nullptr;
  }
}

PCacheOpParent*
CacheStorageParent::AllocPCacheOpParent(const CacheOpArgs& aOpArgs)
{
  if (aOpArgs.type() != CacheOpArgs::TStorageMatchArgs &&
      aOpArgs.type() != CacheOpArgs::TStorageHasArgs &&
      aOpArgs.type() != CacheOpArgs::TStorageOpenArgs &&
      aOpArgs.type() != CacheOpArgs::TStorageDeleteArgs &&
      aOpArgs.type() != CacheOpArgs::TStorageKeysArgs)
  {
    MOZ_CRASH("Invalid operation sent to CacheStorage actor!");
  }

  return new CacheOpParent(Manager(), mNamespace, aOpArgs);
}

bool
CacheStorageParent::DeallocPCacheOpParent(PCacheOpParent* aActor)
{
  delete aActor;
  return true;
}

mozilla::ipc::IPCResult
CacheStorageParent::RecvPCacheOpConstructor(PCacheOpParent* aActor,
                                            const CacheOpArgs& aOpArgs)
{
  auto actor = static_cast<CacheOpParent*>(aActor);

  if (mVerifier) {
    MOZ_DIAGNOSTIC_ASSERT(!mManagerId);
    actor->WaitForVerification(mVerifier);
    return IPC_OK();
  }

  if (NS_WARN_IF(NS_FAILED(mVerifiedStatus))) {
    ErrorResult result(mVerifiedStatus);
    Unused << CacheOpParent::Send__delete__(actor, result, void_t());
    result.SuppressException();
    return IPC_OK();
  }

  MOZ_DIAGNOSTIC_ASSERT(mManagerId);
  actor->Execute(mManagerId);
  return IPC_OK();
}

mozilla::ipc::IPCResult
CacheStorageParent::RecvTeardown()
{
  if (!Send__delete__(this)) {
    // child process is gone, warn and allow actor to clean up normally
    NS_WARNING("CacheStorage failed to delete actor.");
  }
  return IPC_OK();
}

void
CacheStorageParent::OnPrincipalVerified(nsresult aRv, ManagerId* aManagerId)
{
  MOZ_DIAGNOSTIC_ASSERT(mVerifier);
  MOZ_DIAGNOSTIC_ASSERT(!mManagerId);
  MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(mVerifiedStatus));

  if (NS_WARN_IF(NS_FAILED(aRv))) {
    mVerifiedStatus = aRv;
  }

  mManagerId = aManagerId;
  mVerifier->RemoveListener(this);
  mVerifier = nullptr;
}

} // namespace cache
} // namespace dom
} // namespace mozilla