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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 "content/browser/background_fetch/storage/start_next_pending_request_task.h"
#include "base/functional/bind.h"
#include "base/uuid.h"
#include "content/browser/background_fetch/storage/database_helpers.h"
#include "content/browser/service_worker/service_worker_context_wrapper.h"
#include "content/common/fetch/fetch_api_request_proto.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
namespace content {
namespace background_fetch {
StartNextPendingRequestTask::StartNextPendingRequestTask(
DatabaseTaskHost* host,
const BackgroundFetchRegistrationId& registration_id,
NextRequestCallback callback)
: DatabaseTask(host),
registration_id_(registration_id),
callback_(std::move(callback)) {
DCHECK(!registration_id_.is_null());
}
StartNextPendingRequestTask::~StartNextPendingRequestTask() = default;
void StartNextPendingRequestTask::Start() {
GetPendingRequests();
}
void StartNextPendingRequestTask::GetPendingRequests() {
service_worker_context()->GetRegistrationUserDataByKeyPrefix(
registration_id_.service_worker_registration_id(),
PendingRequestKeyPrefix(registration_id_.unique_id()),
base::BindOnce(&StartNextPendingRequestTask::DidGetPendingRequests,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidGetPendingRequests(
const std::vector<std::string>& data,
blink::ServiceWorkerStatusCode status) {
switch (ToDatabaseStatus(status)) {
case DatabaseStatus::kNotFound:
case DatabaseStatus::kFailed:
SetStorageErrorAndFinish(
BackgroundFetchStorageError::kServiceWorkerStorageError);
return;
case DatabaseStatus::kOk:
if (data.empty()) {
// There are no pending requests.
FinishWithError(blink::mojom::BackgroundFetchError::NONE);
return;
}
}
if (!pending_request_.ParseFromString(data.front())) {
// Service Worker database has been corrupted. Abandon fetches.
AbandonFetches(registration_id_.service_worker_registration_id());
SetStorageErrorAndFinish(
BackgroundFetchStorageError::kServiceWorkerStorageError);
return;
}
// Create an active request.
proto::BackgroundFetchActiveRequest active_request;
active_request_.set_download_guid(
base::Uuid::GenerateRandomV4().AsLowercaseString());
active_request_.set_unique_id(pending_request_.unique_id());
active_request_.set_request_index(pending_request_.request_index());
// Transfer ownership of the request to avoid a potentially expensive copy.
active_request_.set_allocated_serialized_request(
pending_request_.release_serialized_request());
active_request_.set_request_body_size(pending_request_.request_body_size());
service_worker_context()->StoreRegistrationUserData(
registration_id_.service_worker_registration_id(),
registration_id_.storage_key(),
{{ActiveRequestKey(active_request_.unique_id(),
active_request_.request_index()),
active_request_.SerializeAsString()}},
base::BindOnce(&StartNextPendingRequestTask::DidStoreActiveRequest,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidStoreActiveRequest(
blink::ServiceWorkerStatusCode status) {
switch (ToDatabaseStatus(status)) {
case DatabaseStatus::kOk:
break;
case DatabaseStatus::kFailed:
case DatabaseStatus::kNotFound:
SetStorageErrorAndFinish(
BackgroundFetchStorageError::kServiceWorkerStorageError);
return;
}
next_request_ = base::MakeRefCounted<BackgroundFetchRequestInfo>(
active_request_.request_index(),
DeserializeFetchRequestFromString(active_request_.serialized_request()),
active_request_.request_body_size());
next_request_->SetDownloadGuid(active_request_.download_guid());
// Delete the pending request.
service_worker_context()->ClearRegistrationUserData(
registration_id_.service_worker_registration_id(),
{PendingRequestKey(pending_request_.unique_id(),
pending_request_.request_index())},
base::BindOnce(&StartNextPendingRequestTask::DidDeletePendingRequest,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidDeletePendingRequest(
blink::ServiceWorkerStatusCode status) {
if (ToDatabaseStatus(status) != DatabaseStatus::kOk) {
SetStorageErrorAndFinish(
BackgroundFetchStorageError::kServiceWorkerStorageError);
} else {
FinishWithError(blink::mojom::BackgroundFetchError::NONE);
}
}
void StartNextPendingRequestTask::FinishWithError(
blink::mojom::BackgroundFetchError error) {
std::move(callback_).Run(error, std::move(next_request_));
Finished(); // Destroys |this|.
}
} // namespace background_fetch
} // namespace content
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