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// Copyright 2018 The Chromium Authors. All rights reserved.
// 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/guid.h"
#include "content/browser/background_fetch/storage/database_helpers.h"
#include "content/browser/service_worker/service_worker_context_wrapper.h"
namespace content {
namespace background_fetch {
StartNextPendingRequestTask::StartNextPendingRequestTask(
BackgroundFetchDataManager* data_manager,
int64_t service_worker_registration_id,
std::unique_ptr<proto::BackgroundFetchMetadata> metadata,
NextRequestCallback callback)
: DatabaseTask(data_manager),
service_worker_registration_id_(service_worker_registration_id),
metadata_(std::move(metadata)),
callback_(std::move(callback)),
weak_factory_(this) {
DCHECK(metadata_);
}
StartNextPendingRequestTask::~StartNextPendingRequestTask() = default;
void StartNextPendingRequestTask::Start() {
GetPendingRequests();
}
void StartNextPendingRequestTask::GetPendingRequests() {
service_worker_context()->GetRegistrationUserDataByKeyPrefix(
service_worker_registration_id_,
PendingRequestKeyPrefix(metadata_->registration().unique_id()),
base::BindOnce(&StartNextPendingRequestTask::DidGetPendingRequests,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidGetPendingRequests(
const std::vector<std::string>& data,
ServiceWorkerStatusCode status) {
switch (ToDatabaseStatus(status)) {
case DatabaseStatus::kNotFound:
case DatabaseStatus::kFailed:
// TODO(crbug.com/780025): Log failures to UMA.
std::move(callback_).Run(nullptr /* request */);
Finished(); // Destroys |this|.
return;
case DatabaseStatus::kOk:
if (data.empty()) {
// There are no pending requests.
std::move(callback_).Run(nullptr /* request */);
Finished(); // Destroys |this|.
return;
}
}
if (!pending_request_.ParseFromString(data.front())) {
NOTREACHED() << "Database is corrupt"; // TODO(crbug.com/780027): Nuke it.
}
// Make sure there isn't already an Active Request.
// This might happen if the browser is killed in-between writes.
service_worker_context()->GetRegistrationUserData(
service_worker_registration_id_,
{ActiveRequestKey(pending_request_.unique_id(),
pending_request_.request_index())},
base::BindOnce(&StartNextPendingRequestTask::DidFindActiveRequest,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidFindActiveRequest(
const std::vector<std::string>& data,
ServiceWorkerStatusCode status) {
switch (ToDatabaseStatus(status)) {
case DatabaseStatus::kFailed:
// TODO(crbug.com/780025): Log failures to UMA.
std::move(callback_).Run(nullptr /* request */);
Finished(); // Destroys |this|.
return;
case DatabaseStatus::kNotFound:
CreateAndStoreActiveRequest();
return;
case DatabaseStatus::kOk:
// We already stored the active request.
if (!active_request_.ParseFromString(data.front())) {
NOTREACHED()
<< "Database is corrupt"; // TODO(crbug.com/780027): Nuke it.
}
StartDownload();
return;
}
NOTREACHED();
}
void StartNextPendingRequestTask::CreateAndStoreActiveRequest() {
proto::BackgroundFetchActiveRequest active_request;
active_request_.set_download_guid(base::GenerateGUID());
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());
service_worker_context()->StoreRegistrationUserData(
service_worker_registration_id_, GURL(metadata_->origin()),
{{ActiveRequestKey(active_request_.unique_id(),
active_request_.request_index()),
active_request_.SerializeAsString()}},
base::BindRepeating(&StartNextPendingRequestTask::DidStoreActiveRequest,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidStoreActiveRequest(
ServiceWorkerStatusCode status) {
switch (ToDatabaseStatus(status)) {
case DatabaseStatus::kOk:
break;
case DatabaseStatus::kFailed:
case DatabaseStatus::kNotFound:
// TODO(crbug.com/780025): Log failures to UMA.
std::move(callback_).Run(nullptr /* request */);
Finished(); // Destroys |this|.
return;
}
StartDownload();
}
void StartNextPendingRequestTask::StartDownload() {
DCHECK(!active_request_.download_guid().empty());
auto next_request = base::MakeRefCounted<BackgroundFetchRequestInfo>(
active_request_.request_index(),
ServiceWorkerFetchRequest::ParseFromString(
active_request_.serialized_request()));
next_request->SetDownloadGuid(active_request_.download_guid());
std::move(callback_).Run(next_request);
// Delete the pending request.
service_worker_context()->ClearRegistrationUserData(
service_worker_registration_id_,
{PendingRequestKey(pending_request_.unique_id(),
pending_request_.request_index())},
base::BindOnce(&StartNextPendingRequestTask::DidDeletePendingRequest,
weak_factory_.GetWeakPtr()));
}
void StartNextPendingRequestTask::DidDeletePendingRequest(
ServiceWorkerStatusCode status) {
// TODO(crbug.com/780025): Log failures to UMA.
Finished(); // Destroys |this|.
}
} // namespace background_fetch
} // namespace content
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