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/* -*- 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
#include "MutableBlobStreamListener.h"
#include "MutableBlobStorage.h"
#include "nsIInputStream.h"
#include "nsThreadUtils.h"
namespace mozilla::dom {
MutableBlobStreamListener::MutableBlobStreamListener(
MutableBlobStorage::MutableBlobStorageType aStorageType,
const nsACString& aContentType, MutableBlobStorageCallback* aCallback,
nsIEventTarget* aEventTarget)
: mCallback(aCallback),
mStorageType(aStorageType),
mContentType(aContentType),
mEventTarget(aEventTarget) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aCallback);
if (!mEventTarget) {
mEventTarget = GetMainThreadSerialEventTarget();
}
MOZ_ASSERT(mEventTarget);
}
MutableBlobStreamListener::~MutableBlobStreamListener() {
MOZ_ASSERT(NS_IsMainThread());
}
NS_IMPL_ISUPPORTS(MutableBlobStreamListener, nsIStreamListener,
nsIThreadRetargetableStreamListener, nsIRequestObserver)
NS_IMETHODIMP
MutableBlobStreamListener::OnStartRequest(nsIRequest* aRequest) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mStorage);
MOZ_ASSERT(mEventTarget);
mStorage = new MutableBlobStorage(mStorageType, mEventTarget);
return NS_OK;
}
NS_IMETHODIMP
MutableBlobStreamListener::OnStopRequest(nsIRequest* aRequest,
nsresult aStatus) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mStorage);
// Resetting mStorage to nullptr.
RefPtr<MutableBlobStorage> storage;
storage.swap(mStorage);
// Let's propagate the error simulating a failure of the storage.
if (NS_FAILED(aStatus)) {
mCallback->BlobStoreCompleted(storage, nullptr, aStatus);
return NS_OK;
}
storage->GetBlobImplWhenReady(mContentType, mCallback);
return NS_OK;
}
NS_IMETHODIMP
MutableBlobStreamListener::OnDataAvailable(nsIRequest* aRequest,
nsIInputStream* aStream,
uint64_t aSourceOffset,
uint32_t aCount) {
// This method could be called on any thread.
MOZ_ASSERT(mStorage);
uint32_t countRead;
return aStream->ReadSegments(WriteSegmentFun, this, aCount, &countRead);
}
nsresult MutableBlobStreamListener::WriteSegmentFun(
nsIInputStream* aWriterStream, void* aClosure, const char* aFromSegment,
uint32_t aToOffset, uint32_t aCount, uint32_t* aWriteCount) {
// This method could be called on any thread.
MutableBlobStreamListener* self =
static_cast<MutableBlobStreamListener*>(aClosure);
MOZ_ASSERT(self->mStorage);
nsresult rv = self->mStorage->Append(aFromSegment, aCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
*aWriteCount = aCount;
return NS_OK;
}
NS_IMETHODIMP
MutableBlobStreamListener::CheckListenerChain() { return NS_OK; }
NS_IMETHODIMP
MutableBlobStreamListener::OnDataFinished(nsresult) { return NS_OK; }
} // namespace mozilla::dom