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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 "storage/browser/blob/blob_url_loader_factory.h"
#include "base/functional/bind.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/mojom/url_loader.mojom.h"
#include "storage/browser/blob/blob_url_registry.h"
namespace storage {
namespace {
// The mojo::Remote<BlobURLToken> parameter is passed in to make sure the
// connection stays alive until this method is called, it is not otherwise used
// by this method.
void CreateFactoryForToken(
mojo::Remote<blink::mojom::BlobURLToken>,
base::WeakPtr<BlobUrlRegistry> url_registry,
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver,
const base::UnguessableToken& token) {
mojo::PendingRemote<blink::mojom::Blob> blob;
GURL blob_url;
if (url_registry)
url_registry->GetTokenMapping(token, &blob_url, &blob);
BlobURLLoaderFactory::Create(std::move(blob), blob_url, std::move(receiver));
}
} // namespace
// static
void BlobURLLoaderFactory::Create(
mojo::PendingRemote<blink::mojom::Blob> pending_blob,
const GURL& blob_url,
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver) {
new BlobURLLoaderFactory(std::move(pending_blob), blob_url,
std::move(receiver));
}
// static
void BlobURLLoaderFactory::Create(
mojo::PendingRemote<blink::mojom::BlobURLToken> token,
base::WeakPtr<BlobUrlRegistry> url_registry,
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver) {
// Not every URLLoaderFactory user deals with the URLLoaderFactory simply
// disconnecting very well, so make sure we always at least bind the receiver
// to some factory that can then fail with a network error. Hence the callback
// is wrapped in WrapCallbackWithDefaultInvokeIfNotRun.
mojo::Remote<blink::mojom::BlobURLToken> token_remote(std::move(token));
auto* raw_token = token_remote.get();
raw_token->GetToken(mojo::WrapCallbackWithDefaultInvokeIfNotRun(
base::BindOnce(&CreateFactoryForToken, std::move(token_remote),
std::move(url_registry), std::move(receiver)),
base::UnguessableToken()));
}
void BlobURLLoaderFactory::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) {
if (url_.is_valid() && request.url != url_) {
receivers_.ReportBadMessage("Invalid URL when attempting to fetch Blob");
mojo::Remote<network::mojom::URLLoaderClient>(std::move(client))
->OnComplete(network::URLLoaderCompletionStatus(net::ERR_INVALID_URL));
return;
}
if (!blob_) {
mojo::Remote<network::mojom::URLLoaderClient>(std::move(client))
->OnComplete(
network::URLLoaderCompletionStatus(net::ERR_FILE_NOT_FOUND));
return;
}
blob_->Load(std::move(loader), request.method, request.headers,
std::move(client));
}
void BlobURLLoaderFactory::Clone(
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver) {
receivers_.Add(this, std::move(receiver));
}
BlobURLLoaderFactory::BlobURLLoaderFactory(
mojo::PendingRemote<blink::mojom::Blob> blob,
const GURL& blob_url,
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver)
: blob_(std::move(blob)), url_(blob_url) {
receivers_.Add(this, std::move(receiver));
receivers_.set_disconnect_handler(base::BindRepeating(
&BlobURLLoaderFactory::OnConnectionError, base::Unretained(this)));
}
BlobURLLoaderFactory::~BlobURLLoaderFactory() = default;
void BlobURLLoaderFactory::OnConnectionError() {
if (!receivers_.empty())
return;
delete this;
}
} // namespace storage
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