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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/blob/testing/fake_blob_registry.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_runner.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "third_party/blink/public/mojom/blob/data_element.mojom-blink.h"
#include "third_party/blink/renderer/platform/blob/testing/fake_blob.h"
namespace {
namespace mojob = ::blink::mojom::blink;
class DataElementReader {
public:
DataElementReader(mojo::PendingReceiver<mojob::Blob> blob,
const String& uuid,
Vector<mojob::DataElementPtr> elements)
: blob_(std::move(blob)),
uuid_(uuid),
elements_(std::move(elements)),
elements_index_(elements_.begin()) {}
void CreateFakeBlob() {
if (elements_index_ == elements_.end()) {
mojo::MakeSelfOwnedReceiver(
std::make_unique<blink::FakeBlob>(uuid_, std::move(blob_body_bytes_)),
std::move(blob_));
delete this;
return;
}
mojob::DataElementPtr& element = *elements_index_;
elements_index_ = std::next(elements_index_);
switch (element->which()) {
case mojob::DataElement::Tag::kBytes: {
const mojob::DataElementBytesPtr& bytes = element->get_bytes();
blob_body_bytes_.AppendVector(*bytes->embedded_data);
return CreateFakeBlob();
}
case mojob::DataElement::Tag::kFile: {
NOTIMPLEMENTED();
break;
}
case mojob::DataElement::Tag::kBlob: {
auto& blob_element = element->get_blob();
mojo::Remote<mojob::Blob> blob_remote(std::move(blob_element->blob));
mojo::ScopedDataPipeProducerHandle data_pipe_producer;
mojo::ScopedDataPipeConsumerHandle data_pipe_consumer;
CHECK_EQ(MOJO_RESULT_OK,
mojo::CreateDataPipe(nullptr, data_pipe_producer,
data_pipe_consumer));
blob_remote->ReadAll(std::move(data_pipe_producer), mojo::NullRemote());
async_reader_ = std::make_unique<DataPipeReader>(
std::move(data_pipe_consumer), blob_body_bytes_,
base::BindOnce(&DataElementReader::OnReadBlobComplete,
base::Unretained(this)));
return;
}
}
}
void OnReadBlobComplete() {
async_reader_.reset();
CreateFakeBlob();
}
private:
class DataPipeReader : public mojo::DataPipeDrainer::Client {
public:
DataPipeReader(mojo::ScopedDataPipeConsumerHandle pipe,
Vector<uint8_t>& blob_body_bytes,
base::OnceClosure done_callback)
: drainer_(this, std::move(pipe)),
blob_body_bytes_(blob_body_bytes),
done_callback_(std::move(done_callback)) {}
void OnDataAvailable(base::span<const uint8_t> data) override {
blob_body_bytes_->AppendSpan(data);
}
void OnDataComplete() override { std::move(done_callback_).Run(); }
private:
mojo::DataPipeDrainer drainer_;
raw_ref<Vector<uint8_t>> blob_body_bytes_;
base::OnceClosure done_callback_;
};
mojo::PendingReceiver<mojob::Blob> blob_;
String uuid_;
Vector<mojob::DataElementPtr> elements_;
Vector<mojob::DataElementPtr>::iterator elements_index_;
Vector<uint8_t> blob_body_bytes_;
std::unique_ptr<DataPipeReader> async_reader_;
};
} // namespace
namespace blink {
class FakeBlobRegistry::DataPipeDrainerClient
: public mojo::DataPipeDrainer::Client {
public:
DataPipeDrainerClient(const String& uuid,
const String& content_type,
RegisterFromStreamCallback callback)
: uuid_(uuid),
content_type_(content_type),
callback_(std::move(callback)) {}
void OnDataAvailable(base::span<const uint8_t> data) override {
length_ += data.size();
}
void OnDataComplete() override {
mojo::Remote<mojom::blink::Blob> blob;
mojo::MakeSelfOwnedReceiver(std::make_unique<FakeBlob>(uuid_),
blob.BindNewPipeAndPassReceiver());
auto handle =
BlobDataHandle::Create(uuid_, content_type_, length_, blob.Unbind());
std::move(callback_).Run(std::move(handle));
}
private:
const String uuid_;
const String content_type_;
RegisterFromStreamCallback callback_;
uint64_t length_ = 0;
};
FakeBlobRegistry::FakeBlobRegistry(bool support_binary_blob_bodies)
: support_binary_blob_bodies_(support_binary_blob_bodies) {}
FakeBlobRegistry::~FakeBlobRegistry() = default;
void FakeBlobRegistry::Register(mojo::PendingReceiver<mojom::blink::Blob> blob,
const String& uuid,
const String& content_type,
const String& content_disposition,
Vector<mojom::blink::DataElementPtr> elements,
RegisterCallback callback) {
Vector<mojom::blink::DataElementPtr> body_elements;
if (support_binary_blob_bodies_) {
body_elements = std::move(elements);
} else {
registrations.push_back(Registration{
uuid, content_type, content_disposition, std::move(elements)});
}
// DataElementReader will delete itself when it creates FakeBlob.
DataElementReader* element_reader =
new DataElementReader(std::move(blob), uuid, std::move(body_elements));
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(&DataElementReader::CreateFakeBlob,
base::Unretained(element_reader)));
std::move(callback).Run();
}
void FakeBlobRegistry::RegisterFromStream(
const String& content_type,
const String& content_disposition,
uint64_t expected_length,
mojo::ScopedDataPipeConsumerHandle data,
mojo::PendingAssociatedRemote<mojom::blink::ProgressClient>,
RegisterFromStreamCallback callback) {
DCHECK(!drainer_);
DCHECK(!drainer_client_);
// `support_binary_blob_bodies_` is not implemented for
// `RegisterFromStream()`.
CHECK(!support_binary_blob_bodies_);
drainer_client_ = std::make_unique<DataPipeDrainerClient>(
"someuuid", content_type, std::move(callback));
drainer_ = std::make_unique<mojo::DataPipeDrainer>(drainer_client_.get(),
std::move(data));
}
} // namespace blink
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