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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/data_url_loader_factory.h"
#include <string_view>
#include "base/memory/ref_counted.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "mojo/public/cpp/system/data_pipe_producer.h"
#include "mojo/public/cpp/system/string_data_source.h"
#include "net/base/data_url.h"
#include "net/base/net_errors.h"
#include "net/http/http_response_headers.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/mojom/url_loader.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
namespace content {
namespace {
struct WriteData {
mojo::Remote<network::mojom::URLLoaderClient> client;
std::string data;
std::unique_ptr<mojo::DataPipeProducer> producer;
};
void OnWrite(std::unique_ptr<WriteData> write_data, MojoResult result) {
if (result != MOJO_RESULT_OK) {
write_data->client->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_FAILED));
return;
}
network::URLLoaderCompletionStatus status(net::OK);
status.encoded_data_length = write_data->data.size();
status.encoded_body_length = write_data->data.size();
status.decoded_body_length = write_data->data.size();
write_data->client->OnComplete(status);
}
} // namespace
DataURLLoaderFactory::DataURLLoaderFactory(
const GURL& url,
mojo::PendingReceiver<network::mojom::URLLoaderFactory> factory_receiver)
: network::SelfDeletingURLLoaderFactory(std::move(factory_receiver)),
url_(url) {}
DataURLLoaderFactory::~DataURLLoaderFactory() = default;
void DataURLLoaderFactory::CreateLoaderAndStart(
mojo::PendingReceiver<network::mojom::URLLoader> loader,
int32_t request_id,
uint32_t options,
const network::ResourceRequest& request,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
const net::MutableNetworkTrafficAnnotationTag& traffic_annotation) {
const GURL* url = nullptr;
if (!url_.is_empty() && request.url.is_empty()) {
url = &url_;
} else {
url = &request.url;
}
std::string data;
scoped_refptr<net::HttpResponseHeaders> headers;
auto response = network::mojom::URLResponseHead::New();
net::Error result = net::DataURL::BuildResponse(
*url, request.method, &response->mime_type, &response->charset, &data,
&response->headers);
// Users of CreateAndBindForOneSpecificUrl should only submit one load
// request - we won't need the URL anymore.
url_ = GURL();
mojo::Remote<network::mojom::URLLoaderClient> client_remote(
std::move(client));
if (result != net::OK) {
client_remote->OnComplete(network::URLLoaderCompletionStatus(result));
return;
}
mojo::ScopedDataPipeProducerHandle producer;
mojo::ScopedDataPipeConsumerHandle consumer;
if (CreateDataPipe(nullptr, producer, consumer) != MOJO_RESULT_OK) {
client_remote->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_INSUFFICIENT_RESOURCES));
return;
}
client_remote->OnReceiveResponse(std::move(response), std::move(consumer),
std::nullopt);
auto write_data = std::make_unique<WriteData>();
write_data->client = std::move(client_remote);
write_data->data = std::move(data);
write_data->producer =
std::make_unique<mojo::DataPipeProducer>(std::move(producer));
mojo::DataPipeProducer* producer_ptr = write_data->producer.get();
std::string_view string_piece(write_data->data);
producer_ptr->Write(
std::make_unique<mojo::StringDataSource>(
string_piece, mojo::StringDataSource::AsyncWritingMode::
STRING_STAYS_VALID_UNTIL_COMPLETION),
base::BindOnce(OnWrite, std::move(write_data)));
}
// static
mojo::PendingRemote<network::mojom::URLLoaderFactory>
DataURLLoaderFactory::Create() {
return CreateForOneSpecificUrl(GURL());
}
// static
mojo::PendingRemote<network::mojom::URLLoaderFactory>
DataURLLoaderFactory::CreateForOneSpecificUrl(const GURL& url) {
mojo::PendingRemote<network::mojom::URLLoaderFactory> pending_remote;
// The DataURLLoaderFactory will delete itself when there are no more
// receivers - see the network::SelfDeletingURLLoaderFactory::OnDisconnect
// method.
new DataURLLoaderFactory(url,
pending_remote.InitWithNewPipeAndPassReceiver());
return pending_remote;
}
} // namespace content
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