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content / browser / service_worker / service_worker_updated_script_loader.cc [blame]
// 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.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/342213636): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "content/browser/service_worker/service_worker_updated_script_loader.h"
#include <memory>
#include <vector>
#include "base/containers/span.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "base/task/sequenced_task_runner.h"
#include "content/browser/service_worker/service_worker_cache_writer.h"
#include "content/browser/service_worker/service_worker_consts.h"
#include "content/browser/service_worker/service_worker_context_core.h"
#include "content/browser/service_worker/service_worker_context_wrapper.h"
#include "content/browser/service_worker/service_worker_loader_helpers.h"
#include "content/browser/service_worker/service_worker_version.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_client.h"
#include "net/base/ip_endpoint.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/cert/cert_status_flags.h"
#include "services/network/public/mojom/early_hints.mojom.h"
#include "services/network/public/mojom/url_response_head.mojom.h"
#include "third_party/blink/public/common/loader/throttling_url_loader.h"
namespace content {
// We chose this size because the AppCache uses this.
const size_t ServiceWorkerUpdatedScriptLoader::kReadBufferSize = 32768;
// This is for debugging https://crbug.com/959627.
// The purpose is to see where the IOBuffer comes from by checking |__vfptr|.
class ServiceWorkerUpdatedScriptLoader::WrappedIOBuffer
: public net::WrappedIOBuffer {
public:
WrappedIOBuffer(const char* data, size_t size)
: net::WrappedIOBuffer(base::make_span(data, size)) {}
private:
~WrappedIOBuffer() override = default;
// This is to make sure that the vtable is not merged with other classes.
virtual void dummy() {
// TODO(crbug.com/40220780): Change back to NOTREACHED() once the
// cause of the bug is identified.
CHECK(false); // NOTREACHED
}
};
std::unique_ptr<ServiceWorkerUpdatedScriptLoader>
ServiceWorkerUpdatedScriptLoader::CreateAndStart(
uint32_t options,
const network::ResourceRequest& original_request,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
scoped_refptr<ServiceWorkerVersion> version) {
return base::WrapUnique(new ServiceWorkerUpdatedScriptLoader(
options, original_request, std::move(client), version));
}
ServiceWorkerUpdatedScriptLoader::ServiceWorkerUpdatedScriptLoader(
uint32_t options,
const network::ResourceRequest& original_request,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
scoped_refptr<ServiceWorkerVersion> version)
: request_url_(original_request.url),
is_main_script_(original_request.destination ==
network::mojom::RequestDestination::kServiceWorker &&
original_request.mode ==
network::mojom::RequestMode::kSameOrigin),
options_(options),
version_(std::move(version)),
network_watcher_(FROM_HERE,
mojo::SimpleWatcher::ArmingPolicy::MANUAL,
base::SequencedTaskRunner::GetCurrentDefault()),
client_(std::move(client)),
client_producer_watcher_(FROM_HERE,
mojo::SimpleWatcher::ArmingPolicy::MANUAL,
base::SequencedTaskRunner::GetCurrentDefault()),
request_start_time_(base::TimeTicks::Now()) {
#if DCHECK_IS_ON()
service_worker_loader_helpers::CheckVersionStatusBeforeWorkerScriptLoad(
version_->status(), is_main_script_, version_->script_type());
#endif // DCHECK_IS_ON()
CHECK(client_);
ServiceWorkerUpdateChecker::ComparedScriptInfo info =
version_->TakeComparedScriptInfo(request_url_);
if (info.result == ServiceWorkerSingleScriptUpdateChecker::Result::kFailed) {
CHECK(!info.paused_state);
// A network error received during update checking. This replays it.
CommitCompleted(info.failure_info->network_status,
info.failure_info->error_message);
return;
}
cache_writer_ = std::move(info.paused_state->cache_writer);
CHECK(cache_writer_);
network_loader_ = std::move(info.paused_state->network_loader);
network_client_remote_ = std::move(info.paused_state->network_client_remote);
pending_network_client_receiver_ =
std::move(info.paused_state->network_client_receiver);
network_loader_state_ = info.paused_state->network_loader_state;
CHECK(network_loader_state_ == LoaderState::kLoadingBody ||
network_loader_state_ == LoaderState::kCompleted);
body_writer_state_ = info.paused_state->body_writer_state;
CHECK(body_writer_state_ == WriterState::kWriting ||
body_writer_state_ == WriterState::kCompleted);
version_->script_cache_map()->NotifyStartedCaching(
request_url_, cache_writer_->writer_resource_id());
// Resume the cache writer and observe its writes, so all data written
// is sent to |client_|.
cache_writer_->set_write_observer(this);
net::Error error = cache_writer_->Resume(base::BindOnce(
&ServiceWorkerUpdatedScriptLoader::OnCacheWriterResumed,
weak_factory_.GetWeakPtr(), info.paused_state->pending_network_buffer,
info.paused_state->consumed_bytes));
if (error != net::ERR_IO_PENDING) {
OnCacheWriterResumed(info.paused_state->pending_network_buffer,
info.paused_state->consumed_bytes, error);
}
}
ServiceWorkerUpdatedScriptLoader::~ServiceWorkerUpdatedScriptLoader() = default;
void ServiceWorkerUpdatedScriptLoader::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) {
// Resource requests for service worker scripts should not follow redirects.
// See comments in OnReceiveRedirect().
CHECK(false); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::SetPriority(
net::RequestPriority priority,
int32_t intra_priority_value) {
if (network_loader_)
network_loader_->SetPriority(priority, intra_priority_value);
}
void ServiceWorkerUpdatedScriptLoader::PauseReadingBodyFromNet() {
if (network_loader_)
network_loader_->PauseReadingBodyFromNet();
}
void ServiceWorkerUpdatedScriptLoader::ResumeReadingBodyFromNet() {
if (network_loader_)
network_loader_->ResumeReadingBodyFromNet();
}
// URLLoaderClient for network loader ------------------------------------------
void ServiceWorkerUpdatedScriptLoader::OnReceiveEarlyHints(
network::mojom::EarlyHintsPtr early_hints) {
CHECK(false); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::OnReceiveResponse(
network::mojom::URLResponseHeadPtr response_head,
mojo::ScopedDataPipeConsumerHandle body,
std::optional<mojo_base::BigBuffer> cached_metadata) {
CHECK(false); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::OnReceiveRedirect(
const net::RedirectInfo& redirect_info,
network::mojom::URLResponseHeadPtr response_head) {
CHECK(false); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::OnUploadProgress(
int64_t current_position,
int64_t total_size,
OnUploadProgressCallback ack_callback) {
CHECK(false); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::OnTransferSizeUpdated(
int32_t transfer_size_diff) {
client_->OnTransferSizeUpdated(transfer_size_diff);
}
void ServiceWorkerUpdatedScriptLoader::OnComplete(
const network::URLLoaderCompletionStatus& status) {
LoaderState previous_state = network_loader_state_;
network_loader_state_ = LoaderState::kCompleted;
if (status.error_code != net::OK) {
CommitCompleted(status,
ServiceWorkerConsts::kServiceWorkerFetchScriptError);
return;
}
CHECK_EQ(LoaderState::kLoadingBody, previous_state);
switch (body_writer_state_) {
case WriterState::kNotStarted:
CHECK(false) << "WriterState::kNotStarted"; // NOTREACHED
return;
case WriterState::kWriting:
// Wait until it's written. OnNetworkDataAvailable() will call
// CommitCompleted() after all data from |network_consumer_| is
// consumed.
return;
case WriterState::kCompleted:
CommitCompleted(network::URLLoaderCompletionStatus(net::OK),
std::string() /* status_message */);
return;
}
CHECK(false) << static_cast<int>(body_writer_state_); // NOTREACHED
}
// End of URLLoaderClient ------------------------------------------------------
int ServiceWorkerUpdatedScriptLoader::WillWriteResponseHead(
const network::mojom::URLResponseHead& response_head) {
auto client_response = response_head.Clone();
client_response->request_start = request_start_time_;
if (is_main_script_) {
version_->SetMainScriptResponse(
std::make_unique<ServiceWorkerVersion::MainScriptResponse>(
*client_response));
}
// Don't pass SSLInfo to the client when the original request doesn't ask
// to send it.
if (client_response->ssl_info.has_value() &&
!(options_ & network::mojom::kURLLoadOptionSendSSLInfoWithResponse)) {
client_response->ssl_info.reset();
}
mojo::ScopedDataPipeConsumerHandle client_consumer;
if (mojo::CreateDataPipe(nullptr, client_producer_, client_consumer) !=
MOJO_RESULT_OK) {
// Reports error to cache writer and finally the loader would process this
// failure in OnCacheWriterResumed()
return net::ERR_INSUFFICIENT_RESOURCES;
}
// Pass the consumer handle to the client.
client_->OnReceiveResponse(std::move(client_response),
std::move(client_consumer), std::nullopt);
client_producer_watcher_.Watch(
client_producer_.get(), MOJO_HANDLE_SIGNAL_WRITABLE,
base::BindRepeating(&ServiceWorkerUpdatedScriptLoader::OnClientWritable,
weak_factory_.GetWeakPtr()));
return net::OK;
}
void ServiceWorkerUpdatedScriptLoader::OnClientWritable(MojoResult) {
if (pending_network_buffer_) {
DCHECK_GT(pending_network_bytes_available_, 0u);
scoped_refptr<network::MojoToNetPendingBuffer> pending_buffer =
std::move(pending_network_buffer_);
uint32_t bytes_available = pending_network_bytes_available_;
pending_network_bytes_available_ = 0;
WriteData(std::move(pending_buffer), bytes_available);
return;
}
CHECK(data_to_send_);
CHECK_GE(data_length_, bytes_sent_to_client_);
CHECK(client_producer_);
// Cap the buffer size up to |kReadBufferSize|. The remaining will be written
// next time.
base::span<const uint8_t> bytes_to_send = data_to_send_->span();
bytes_to_send = bytes_to_send.first(
std::min(bytes_to_send.size(), base::checked_cast<size_t>(data_length_)));
bytes_to_send = bytes_to_send.subspan(bytes_sent_to_client_);
bytes_to_send = bytes_to_send.first(
std::min<size_t>(bytes_to_send.size(), kReadBufferSize));
size_t actually_sent_bytes = 0;
MojoResult result = client_producer_->WriteData(
bytes_to_send, MOJO_WRITE_DATA_FLAG_NONE, actually_sent_bytes);
if (result == MOJO_RESULT_SHOULD_WAIT) {
// No data was written to |client_producer_| because the pipe was full.
// Retry when the pipe becomes ready again.
client_producer_watcher_.ArmOrNotify();
return;
}
if (result != MOJO_RESULT_OK) {
ServiceWorkerMetrics::CountWriteResponseResult(
ServiceWorkerMetrics::WRITE_DATA_ERROR);
CommitCompleted(network::URLLoaderCompletionStatus(net::ERR_FAILED),
ServiceWorkerConsts::kServiceWorkerFetchScriptError);
return;
}
bytes_sent_to_client_ += actually_sent_bytes;
if (bytes_sent_to_client_ != data_length_) {
// Not all data is sent. Send the rest in another task.
client_producer_watcher_.ArmOrNotify();
return;
}
std::move(write_observer_complete_callback_).Run(net::OK);
}
int ServiceWorkerUpdatedScriptLoader::WillWriteData(
scoped_refptr<net::IOBuffer> data,
int length,
base::OnceCallback<void(net::Error)> callback) {
CHECK(!write_observer_complete_callback_);
CHECK(client_producer_);
data_to_send_ = std::move(data);
data_length_ = length;
bytes_sent_to_client_ = 0;
write_observer_complete_callback_ = std::move(callback);
client_producer_watcher_.ArmOrNotify();
return net::ERR_IO_PENDING;
}
void ServiceWorkerUpdatedScriptLoader::OnCacheWriterResumed(
scoped_refptr<network::MojoToNetPendingBuffer> pending_network_buffer,
uint32_t consumed_bytes,
net::Error error) {
CHECK_NE(error, net::ERR_IO_PENDING);
// Stop observing write operations in cache writer as further data are
// from network which would be processed by OnNetworkDataAvailable().
cache_writer_->set_write_observer(nullptr);
if (error != net::OK) {
CommitCompleted(network::URLLoaderCompletionStatus(error),
ServiceWorkerConsts::kDatabaseErrorMessage);
return;
}
// If the script has no body or all the body has already been read when it
// was paused, we don't have to wait for more data from network.
if (body_writer_state_ == WriterState::kCompleted) {
CommitCompleted(network::URLLoaderCompletionStatus(net::OK), std::string());
return;
}
// The data in the pending buffer has been processed during resuming. At this
// point, this completes the pending read and releases the Mojo handle to
// continue with reading the rest of the body.
CHECK(pending_network_buffer);
pending_network_buffer->CompleteRead(consumed_bytes);
network_consumer_ = pending_network_buffer->ReleaseHandle();
// Continue to load the rest of the body from the network.
CHECK_EQ(body_writer_state_, WriterState::kWriting);
CHECK(network_consumer_);
network_client_receiver_.Bind(std::move(pending_network_client_receiver_));
network_watcher_.Watch(
network_consumer_.get(),
MOJO_HANDLE_SIGNAL_READABLE | MOJO_HANDLE_SIGNAL_PEER_CLOSED,
base::BindRepeating(
&ServiceWorkerUpdatedScriptLoader::OnNetworkDataAvailable,
weak_factory_.GetWeakPtr()));
network_watcher_.ArmOrNotify();
}
void ServiceWorkerUpdatedScriptLoader::OnNetworkDataAvailable(MojoResult) {
CHECK_EQ(WriterState::kWriting, body_writer_state_);
CHECK(network_consumer_.is_valid());
scoped_refptr<network::MojoToNetPendingBuffer> pending_buffer;
MojoResult result = network::MojoToNetPendingBuffer::BeginRead(
&network_consumer_, &pending_buffer);
switch (result) {
case MOJO_RESULT_OK: {
const uint32_t bytes_available = pending_buffer->size();
WriteData(std::move(pending_buffer), bytes_available);
return;
}
case MOJO_RESULT_FAILED_PRECONDITION: {
// Call WriteData() with null buffer to let the cache writer know that
// body from the network reaches to the end.
WriteData(/*pending_buffer=*/nullptr, /*bytes_available=*/0);
return;
}
case MOJO_RESULT_SHOULD_WAIT: {
network_watcher_.ArmOrNotify();
return;
}
}
CHECK(false) << static_cast<int>(result); // NOTREACHED
}
void ServiceWorkerUpdatedScriptLoader::WriteData(
scoped_refptr<network::MojoToNetPendingBuffer> pending_buffer,
uint32_t bytes_available) {
auto buffer = base::MakeRefCounted<WrappedIOBuffer>(
pending_buffer ? pending_buffer->buffer() : nullptr,
pending_buffer ? pending_buffer->size() : 0);
// Cap the buffer size up to |kReadBufferSize|. The remaining will be written
// next time.
base::span<const uint8_t> bytes = buffer->span();
bytes = bytes.first(std::min(kReadBufferSize, size_t{bytes_available}));
size_t actually_written_bytes = 0;
MojoResult result = client_producer_->WriteData(
bytes, MOJO_WRITE_DATA_FLAG_NONE, actually_written_bytes);
switch (result) {
case MOJO_RESULT_OK:
break;
case MOJO_RESULT_FAILED_PRECONDITION:
ServiceWorkerMetrics::CountWriteResponseResult(
ServiceWorkerMetrics::WRITE_DATA_ERROR);
CommitCompleted(network::URLLoaderCompletionStatus(net::ERR_FAILED),
ServiceWorkerConsts::kServiceWorkerFetchScriptError);
return;
case MOJO_RESULT_SHOULD_WAIT:
DCHECK(pending_buffer);
DCHECK(!pending_network_buffer_);
DCHECK_EQ(pending_network_bytes_available_, 0u);
// No data was written to `client_producer_` because the pipe was full.
// Retry when the pipe becomes ready again.
pending_network_buffer_ = std::move(pending_buffer);
pending_network_bytes_available_ = bytes_available;
client_producer_watcher_.ArmOrNotify();
return;
default:
CHECK(false) << static_cast<int>(result); // NOTREACHED
return;
}
// Write the buffer in the service worker script storage up to the size we
// successfully wrote to the data pipe (i.e., |actually_written_bytes|). A
// null buffer and zero |actually_written_bytes| are passed when this is the
// end of the body.
net::Error error = cache_writer_->MaybeWriteData(
buffer.get(), actually_written_bytes,
base::BindOnce(&ServiceWorkerUpdatedScriptLoader::OnWriteDataComplete,
weak_factory_.GetWeakPtr(), pending_buffer,
actually_written_bytes));
if (error == net::ERR_IO_PENDING) {
// OnWriteDataComplete() will be called asynchronously.
return;
}
// MaybeWriteData() doesn't run the callback if it finishes synchronously, so
// explicitly call it here.
OnWriteDataComplete(std::move(pending_buffer), actually_written_bytes, error);
}
void ServiceWorkerUpdatedScriptLoader::OnWriteDataComplete(
scoped_refptr<network::MojoToNetPendingBuffer> pending_buffer,
size_t bytes_written,
net::Error error) {
CHECK_NE(net::ERR_IO_PENDING, error);
if (error != net::OK) {
ServiceWorkerMetrics::CountWriteResponseResult(
ServiceWorkerMetrics::WRITE_DATA_ERROR);
CommitCompleted(network::URLLoaderCompletionStatus(error),
ServiceWorkerConsts::kDatabaseErrorMessage);
return;
}
ServiceWorkerMetrics::CountWriteResponseResult(
ServiceWorkerMetrics::WRITE_OK);
if (bytes_written == 0) {
// Zero |bytes_written| with net::OK means that all data has been read from
// the network and the Mojo data pipe has been closed. Thus we can complete
// the request if OnComplete() has already been received.
CHECK(!pending_buffer);
body_writer_state_ = WriterState::kCompleted;
if (network_loader_state_ == LoaderState::kCompleted) {
CommitCompleted(network::URLLoaderCompletionStatus(net::OK),
std::string() /* status_message */);
}
return;
}
CHECK(pending_buffer);
pending_buffer->CompleteRead(base::checked_cast<uint32_t>(bytes_written));
// Get the consumer handle from a previous read operation if we have one.
network_consumer_ = pending_buffer->ReleaseHandle();
network_watcher_.ArmOrNotify();
}
void ServiceWorkerUpdatedScriptLoader::CommitCompleted(
const network::URLLoaderCompletionStatus& status,
const std::string& status_message) {
net::Error error_code = static_cast<net::Error>(status.error_code);
int bytes_written = -1;
std::string sha256_checksum;
if (error_code == net::OK) {
CHECK(cache_writer_);
CHECK_EQ(LoaderState::kCompleted, network_loader_state_);
CHECK_EQ(WriterState::kCompleted, body_writer_state_);
// If all the calls to WriteHeaders/WriteData succeeded, but the incumbent
// entry wasn't actually replaced because the new entry was equivalent, the
// new version didn't actually install because it already exists.
if (!cache_writer_->did_replace()) {
version_->SetStartWorkerStatusCode(
blink::ServiceWorkerStatusCode::kErrorExists);
error_code = net::ERR_FILE_EXISTS;
}
bytes_written = cache_writer_->bytes_written();
sha256_checksum = cache_writer_->GetSha256Checksum();
} else {
// AddMessageConsole must be called before notifying that an error occurred
// because the worker stops soon after receiving the error response.
// TODO(nhiroki): Consider replacing this hacky way with the new error code
// handling mechanism in URLLoader.
version_->AddMessageToConsole(blink::mojom::ConsoleMessageLevel::kError,
status_message);
}
// Cache writer could be nullptr when update checking observed a network error
// and this loader hasn't started the caching yet.
if (cache_writer_) {
version_->script_cache_map()->NotifyFinishedCaching(
request_url_, bytes_written, sha256_checksum, error_code,
status_message);
}
client_->OnComplete(status);
client_producer_.reset();
client_producer_watcher_.Cancel();
network_loader_.reset();
network_client_remote_.reset();
network_client_receiver_.reset();
network_consumer_.reset();
network_watcher_.Cancel();
cache_writer_.reset();
network_loader_state_ = LoaderState::kCompleted;
body_writer_state_ = WriterState::kCompleted;
}
} // namespace content