dom/fetch/EmptyBody.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "EmptyBody.h"
   8
   9 #include "mozilla/ipc/PBackgroundSharedTypes.h"
  10 #include "nsStringStream.h"
  11
  12 namespace mozilla::dom {
  13
  14 NS_IMPL_ADDREF_INHERITED(EmptyBody, FetchBody<EmptyBody>)
  15 NS_IMPL_RELEASE_INHERITED(EmptyBody, FetchBody<EmptyBody>)
  16
  17 NS_IMPL_CYCLE_COLLECTION_CLASS(EmptyBody)
  18
  19 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(EmptyBody, FetchBody<EmptyBody>)
  20   AbortFollower::Unlink(static_cast<AbortFollower*>(tmp));
  21   NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner)
  22   NS_IMPL_CYCLE_COLLECTION_UNLINK(mAbortSignalImpl)
  23   NS_IMPL_CYCLE_COLLECTION_UNLINK(mFetchStreamReader)
  24 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  25
  26 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(EmptyBody,
  27                                                   FetchBody<EmptyBody>)
  28   AbortFollower::Traverse(static_cast<AbortFollower*>(tmp), cb);
  29   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwner)
  30   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAbortSignalImpl)
  31   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFetchStreamReader)
  32 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  33
  34 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(EmptyBody, FetchBody<EmptyBody>)
  35 NS_IMPL_CYCLE_COLLECTION_TRACE_END
  36
  37 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EmptyBody)
  38 NS_INTERFACE_MAP_END_INHERITING(FetchBody<EmptyBody>)
  39
  40 EmptyBody::EmptyBody(nsIGlobalObject* aGlobal,
  41                      mozilla::ipc::PrincipalInfo* aPrincipalInfo,
  42                      AbortSignalImpl* aAbortSignalImpl,
  43                      const nsACString& aMimeType,
  44                      already_AddRefed<nsIInputStream> aBodyStream)
  45     : FetchBody<EmptyBody>(aGlobal),
  46       mAbortSignalImpl(aAbortSignalImpl),
  47       mMimeType(aMimeType),
  48       mBodyStream(std::move(aBodyStream)) {
  49   if (aPrincipalInfo) {
  50     mPrincipalInfo = MakeUnique<mozilla::ipc::PrincipalInfo>(*aPrincipalInfo);
  51   }
  52 }
  53
  54 EmptyBody::~EmptyBody() = default;
  55
  56 /* static */
  57 already_AddRefed<EmptyBody> EmptyBody::Create(
  58     nsIGlobalObject* aGlobal, mozilla::ipc::PrincipalInfo* aPrincipalInfo,
  59     AbortSignalImpl* aAbortSignalImpl, const nsACString& aMimeType,
  60     ErrorResult& aRv) {
  61   nsCOMPtr<nsIInputStream> bodyStream;
  62   aRv = NS_NewCStringInputStream(getter_AddRefs(bodyStream), ""_ns);
  63   if (NS_WARN_IF(aRv.Failed())) {
  64     return nullptr;
  65   }
  66
  67   RefPtr<EmptyBody> emptyBody =
  68       new EmptyBody(aGlobal, aPrincipalInfo, aAbortSignalImpl, aMimeType,
  69                     bodyStream.forget());
  70   return emptyBody.forget();
  71 }
  72
  73 void EmptyBody::GetBody(nsIInputStream** aStream, int64_t* aBodyLength) {
  74   MOZ_ASSERT(aStream);
  75
  76   if (aBodyLength) {
  77     *aBodyLength = 0;
  78   }
  79
  80   nsCOMPtr<nsIInputStream> bodyStream = mBodyStream;
  81   bodyStream.forget(aStream);
  82 }
  83
  84 }  // namespace mozilla::dom