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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "storage/browser/blob/blob_url_loader.h"
#include <stddef.h>
#include <utility>
#include "base/check_op.h"
#include "base/format_macros.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/memory/weak_ptr.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/task/sequenced_task_runner.h"
#include "net/base/io_buffer.h"
#include "net/http/http_byte_range.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_response_info.h"
#include "net/http/http_status_code.h"
#include "net/http/http_util.h"
#include "services/network/public/cpp/constants.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "storage/browser/blob/blob_data_handle.h"
#include "storage/browser/blob/mojo_blob_reader.h"
#include "third_party/blink/public/common/blob/blob_utils.h"
namespace storage {
namespace {
scoped_refptr<net::HttpResponseHeaders> GenerateHeaders(
net::HttpStatusCode status_code,
BlobDataHandle* blob_handle,
net::HttpByteRange* byte_range,
uint64_t total_size,
uint64_t content_size) {
std::string status("HTTP/1.1 ");
status.append(base::NumberToString(status_code));
status.append(" ");
status.append(net::GetHttpReasonPhrase(status_code));
status.append("\0\0", 2);
scoped_refptr<net::HttpResponseHeaders> headers =
base::MakeRefCounted<net::HttpResponseHeaders>(status);
if (status_code == net::HTTP_OK || status_code == net::HTTP_PARTIAL_CONTENT) {
headers->SetHeader(net::HttpRequestHeaders::kContentLength,
base::NumberToString(content_size));
if (status_code == net::HTTP_PARTIAL_CONTENT) {
DCHECK(byte_range->IsValid());
std::string content_range_header;
content_range_header.append("bytes ");
content_range_header.append(base::StringPrintf(
"%" PRId64 "-%" PRId64, byte_range->first_byte_position(),
byte_range->last_byte_position()));
content_range_header.append("/");
content_range_header.append(base::StringPrintf("%" PRId64, total_size));
headers->SetHeader(net::HttpResponseHeaders::kContentRange,
content_range_header);
}
headers->SetHeader(net::HttpRequestHeaders::kContentType,
blob_handle->content_type());
if (!blob_handle->content_disposition().empty()) {
headers->SetHeader("Content-Disposition",
blob_handle->content_disposition());
}
}
return headers;
}
} // namespace
// static
void BlobURLLoader::CreateAndStart(
mojo::PendingReceiver<network::mojom::URLLoader> url_loader_receiver,
const network::ResourceRequest& request,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
std::unique_ptr<BlobDataHandle> blob_handle) {
(new BlobURLLoader(std::move(url_loader_receiver), std::move(client),
std::move(blob_handle)))
->Start(request.method, request.headers);
}
// static
void BlobURLLoader::CreateAndStart(
mojo::PendingReceiver<network::mojom::URLLoader> url_loader_receiver,
const std::string& method,
const net::HttpRequestHeaders& headers,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
std::unique_ptr<BlobDataHandle> blob_handle) {
(new BlobURLLoader(std::move(url_loader_receiver), std::move(client),
std::move(blob_handle)))
->Start(method, headers);
}
BlobURLLoader::~BlobURLLoader() = default;
BlobURLLoader::BlobURLLoader(
mojo::PendingReceiver<network::mojom::URLLoader> url_loader_receiver,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
std::unique_ptr<BlobDataHandle> blob_handle)
: receiver_(this, std::move(url_loader_receiver)),
client_(std::move(client)),
blob_handle_(std::move(blob_handle)) {}
void BlobURLLoader::Start(const std::string& method,
const net::HttpRequestHeaders& headers) {
if (!blob_handle_) {
OnComplete(net::ERR_FILE_NOT_FOUND, 0);
delete this;
return;
}
// We only support GET request per the spec.
if (method != "GET") {
OnComplete(net::ERR_METHOD_NOT_SUPPORTED, 0);
delete this;
return;
}
if (std::optional<std::string> range_header =
headers.GetHeader(net::HttpRequestHeaders::kRange);
range_header) {
// We only care about "Range" header here.
std::vector<net::HttpByteRange> ranges;
if (net::HttpUtil::ParseRangeHeader(range_header.value(), &ranges)) {
if (ranges.size() == 1) {
byte_range_set_ = true;
byte_range_ = ranges[0];
} else {
// We don't support multiple range requests in one single URL request,
// because we need to do multipart encoding here.
// TODO(jianli): Support multipart byte range requests.
OnComplete(net::ERR_REQUEST_RANGE_NOT_SATISFIABLE, 0);
delete this;
return;
}
}
}
mojo::ScopedDataPipeProducerHandle producer_handle;
mojo::ScopedDataPipeConsumerHandle consumer_handle;
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(MojoCreateDataPipeOptions);
options.flags = MOJO_CREATE_DATA_PIPE_FLAG_NONE;
options.element_num_bytes = 1;
options.capacity_num_bytes =
blink::BlobUtils::GetDataPipeCapacity(blob_handle_->size());
if (mojo::CreateDataPipe(&options, producer_handle, consumer_handle) !=
MOJO_RESULT_OK) {
OnComplete(net::ERR_INSUFFICIENT_RESOURCES, 0);
delete this;
return;
}
response_body_consumer_handle_ = std::move(consumer_handle);
MojoBlobReader::Create(blob_handle_.get(), byte_range_,
base::WrapUnique(this), std::move(producer_handle));
}
void BlobURLLoader::FollowRedirect(
const std::vector<std::string>& removed_headers,
const net::HttpRequestHeaders& modified_headers,
const net::HttpRequestHeaders& modified_cors_exempt_headers,
const std::optional<GURL>& new_url) {
NOTREACHED();
}
MojoBlobReader::Delegate::RequestSideData BlobURLLoader::DidCalculateSize(
uint64_t total_size,
uint64_t content_size) {
total_size_ = total_size;
bool result = byte_range_.ComputeBounds(total_size);
DCHECK(result);
net::HttpStatusCode status_code = net::HTTP_OK;
if (byte_range_set_ && byte_range_.IsValid()) {
status_code = net::HTTP_PARTIAL_CONTENT;
} else {
DCHECK_EQ(total_size, content_size);
// TODO(horo): When the requester doesn't need the side data
// (ex:FileReader) we should skip reading the side data.
return REQUEST_SIDE_DATA;
}
HeadersCompleted(status_code, content_size, std::nullopt);
return DONT_REQUEST_SIDE_DATA;
}
void BlobURLLoader::DidReadSideData(std::optional<mojo_base::BigBuffer> data) {
HeadersCompleted(net::HTTP_OK, total_size_, std::move(data));
}
void BlobURLLoader::OnComplete(net::Error error_code,
uint64_t total_written_bytes) {
network::URLLoaderCompletionStatus status(error_code);
status.encoded_body_length = total_written_bytes;
status.decoded_body_length = total_written_bytes;
client_->OnComplete(status);
}
void BlobURLLoader::HeadersCompleted(
net::HttpStatusCode status_code,
uint64_t content_size,
std::optional<mojo_base::BigBuffer> metadata) {
auto response = network::mojom::URLResponseHead::New();
response->content_length = 0;
if (status_code == net::HTTP_OK || status_code == net::HTTP_PARTIAL_CONTENT)
response->content_length = content_size;
response->headers = GenerateHeaders(status_code, blob_handle_.get(),
&byte_range_, total_size_, content_size);
std::string mime_type;
response->headers->GetMimeType(&mime_type);
if (mime_type.empty())
mime_type = "text/plain";
response->mime_type = mime_type;
response->headers->GetCharset(&response->charset);
// TODO(jam): some of this code can be shared with
// services/network/url_loader.h
client_->OnReceiveResponse(std::move(response),
std::move(response_body_consumer_handle_),
std::move(metadata));
sent_headers_ = true;
}
} // namespace storage
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