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content / browser / worker_host / worker_script_loader.cc [blame]
// 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/worker_host/worker_script_loader.h"
#include "base/functional/bind.h"
#include "content/browser/loader/navigation_loader_interceptor.h"
#include "content/browser/loader/response_head_update_params.h"
#include "content/browser/service_worker/service_worker_client.h"
#include "content/browser/service_worker/service_worker_main_resource_handle.h"
#include "content/browser/service_worker/service_worker_main_resource_loader_interceptor.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/load_timing_info.h"
#include "net/url_request/redirect_util.h"
#include "services/network/public/cpp/record_ontransfersizeupdate_utils.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/url_loader_completion_status.h"
#include "services/network/public/mojom/early_hints.mojom.h"
namespace content {
WorkerScriptLoader::WorkerScriptLoader(
int process_id,
const DedicatedOrSharedWorkerToken& worker_token,
int32_t request_id,
uint32_t options,
const network::ResourceRequest& resource_request,
const net::IsolationInfo& isolation_info,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
base::WeakPtr<ServiceWorkerMainResourceHandle> service_worker_handle,
const BrowserContextGetter& browser_context_getter,
scoped_refptr<network::SharedURLLoaderFactory> default_loader_factory,
const net::MutableNetworkTrafficAnnotationTag& traffic_annotation)
: request_id_(request_id),
options_(options),
resource_request_(resource_request),
client_(std::move(client)),
service_worker_handle_(std::move(service_worker_handle)),
browser_context_getter_(browser_context_getter),
default_loader_factory_(std::move(default_loader_factory)),
traffic_annotation_(traffic_annotation) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (!service_worker_handle_) {
// The DedicatedWorkerHost or SharedWorkerHost is already destroyed.
Abort();
return;
}
interceptor_ = ServiceWorkerMainResourceLoaderInterceptor::CreateForWorker(
resource_request_, isolation_info, process_id, worker_token,
service_worker_handle_);
Start();
}
WorkerScriptLoader::~WorkerScriptLoader() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
base::WeakPtr<WorkerScriptLoader> WorkerScriptLoader::GetWeakPtr() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return weak_factory_.GetWeakPtr();
}
void WorkerScriptLoader::Abort() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
complete_status_ = network::URLLoaderCompletionStatus(net::ERR_ABORTED);
CommitCompleted();
}
void WorkerScriptLoader::Start() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
CHECK_EQ(state_, State::kInitial);
// The DedicatedWorkerHost or SharedWorkerHost is already destroyed.
if (!service_worker_handle_) {
Abort();
return;
}
BrowserContext* browser_context = browser_context_getter_.Run();
if (!browser_context) {
Abort();
return;
}
if (interceptor_) {
interceptor_->MaybeCreateLoader(
resource_request_, browser_context,
base::BindOnce(&WorkerScriptLoader::MaybeStartLoader,
weak_factory_.GetWeakPtr(), interceptor_.get()),
base::BindOnce(
[](base::WeakPtr<WorkerScriptLoader> self,
ResponseHeadUpdateParams) {
if (self) {
self->LoadFromNetwork();
}
},
weak_factory_.GetWeakPtr()));
return;
}
LoadFromNetwork();
}
void WorkerScriptLoader::MaybeStartLoader(
ServiceWorkerMainResourceLoaderInterceptor* interceptor,
std::optional<NavigationLoaderInterceptor::Result> interceptor_result) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
CHECK_EQ(state_, State::kInitial);
DCHECK(interceptor);
if (!service_worker_handle_) {
// The DedicatedWorkerHost or SharedWorkerHost is already destroyed.
Abort();
return;
}
// `interceptor_result->subresource_loader_params` isn't set by
// ServiceWorkerMainResourceLoaderInterceptor and thus is ignored here.
if (interceptor_result && interceptor_result->single_request_factory) {
// The interceptor elected to handle the request. Use it.
url_loader_factory_ = std::move(interceptor_result->single_request_factory);
url_loader_.reset();
url_loader_factory_->CreateLoaderAndStart(
url_loader_.BindNewPipeAndPassReceiver(), request_id_, options_,
resource_request_,
url_loader_client_receiver_.BindNewPipeAndPassRemote(),
traffic_annotation_);
// We continue in URLLoaderClient calls.
return;
}
// The interceptor didn't elect to handle the request. Fallback to network.
LoadFromNetwork();
}
void WorkerScriptLoader::LoadFromNetwork() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
CHECK_EQ(state_, State::kInitial);
url_loader_client_receiver_.reset();
url_loader_factory_ = default_loader_factory_;
url_loader_.reset();
url_loader_factory_->CreateLoaderAndStart(
url_loader_.BindNewPipeAndPassReceiver(), request_id_, options_,
resource_request_, url_loader_client_receiver_.BindNewPipeAndPassRemote(),
traffic_annotation_);
// We continue in URLLoaderClient calls.
}
// URLLoader -------------------------------------------------------------------
// When this class gets a FollowRedirect IPC from the renderer, it restarts with
// the new URL.
void WorkerScriptLoader::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) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!new_url.has_value()) << "Redirect with modified URL was not "
"supported yet. crbug.com/845683";
DCHECK(redirect_info_);
// |should_clear_upload| is unused because there is no body anyway.
DCHECK(!resource_request_.request_body);
bool should_clear_upload = false;
net::RedirectUtil::UpdateHttpRequest(
resource_request_.url, resource_request_.method, *redirect_info_,
removed_headers, modified_headers, &resource_request_.headers,
&should_clear_upload);
resource_request_.cors_exempt_headers.MergeFrom(modified_cors_exempt_headers);
for (const std::string& name : removed_headers)
resource_request_.cors_exempt_headers.RemoveHeader(name);
resource_request_.url = redirect_info_->new_url;
resource_request_.method = redirect_info_->new_method;
resource_request_.site_for_cookies = redirect_info_->new_site_for_cookies;
resource_request_.referrer = GURL(redirect_info_->new_referrer);
resource_request_.referrer_policy = redirect_info_->new_referrer_policy;
// Restart the request.
url_loader_client_receiver_.reset();
redirect_info_.reset();
Start();
}
// Below we make a small effort to support the other URLLoader functions by
// forwarding to the current |url_loader_| if any, but don't bother queuing
// state or propagating state to a new URLLoader upon redirect.
void WorkerScriptLoader::SetPriority(net::RequestPriority priority,
int32_t intra_priority_value) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (url_loader_)
url_loader_->SetPriority(priority, intra_priority_value);
}
void WorkerScriptLoader::PauseReadingBodyFromNet() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (url_loader_)
url_loader_->PauseReadingBodyFromNet();
}
void WorkerScriptLoader::ResumeReadingBodyFromNet() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (url_loader_)
url_loader_->ResumeReadingBodyFromNet();
}
// URLLoader end --------------------------------------------------------------
// URLLoaderClient ------------------------------------------------------------
// This class forwards any client messages to the outer client in the renderer.
// Additionally, on redirects it saves the redirect info so if the renderer
// calls FollowRedirect(), it can do so.
void WorkerScriptLoader::OnReceiveEarlyHints(
network::mojom::EarlyHintsPtr early_hints) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
client_->OnReceiveEarlyHints(std::move(early_hints));
}
void WorkerScriptLoader::OnReceiveResponse(
network::mojom::URLResponseHeadPtr response_head,
mojo::ScopedDataPipeConsumerHandle body,
std::optional<mojo_base::BigBuffer> cached_metadata) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
client_->OnReceiveResponse(std::move(response_head), std::move(body),
std::move(cached_metadata));
}
void WorkerScriptLoader::OnReceiveRedirect(
const net::RedirectInfo& redirect_info,
network::mojom::URLResponseHeadPtr response_head) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (--redirect_limit_ == 0) {
complete_status_ =
network::URLLoaderCompletionStatus(net::ERR_TOO_MANY_REDIRECTS);
CommitCompleted();
return;
}
redirect_info_ = redirect_info;
client_->OnReceiveRedirect(redirect_info, std::move(response_head));
}
void WorkerScriptLoader::OnUploadProgress(
int64_t current_position,
int64_t total_size,
OnUploadProgressCallback ack_callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
client_->OnUploadProgress(current_position, total_size,
std::move(ack_callback));
}
void WorkerScriptLoader::OnTransferSizeUpdated(int32_t transfer_size_diff) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
network::RecordOnTransferSizeUpdatedUMA(
network::OnTransferSizeUpdatedFrom::kWorkerScriptLoader);
client_->OnTransferSizeUpdated(transfer_size_diff);
}
void WorkerScriptLoader::OnComplete(
const network::URLLoaderCompletionStatus& status) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
complete_status_ = status;
switch (state_) {
case State::kInitial:
// Don't wait for `WorkerScriptFetcher::callback_` on failure.
if (status.error_code != net::OK) {
break;
}
state_ = State::kOnCompleteCalled;
return;
case State::kFetcherCallbackCalled:
break;
case State::kOnCompleteCalled:
case State::kCompleted:
NOTREACHED();
}
CommitCompleted();
}
// URLLoaderClient end ---------------------------------------------------------
void WorkerScriptLoader::OnFetcherCallbackCalled() {
switch (state_) {
case State::kInitial:
state_ = State::kFetcherCallbackCalled;
break;
case State::kOnCompleteCalled:
CHECK(complete_status_);
CHECK_EQ(complete_status_->error_code, net::OK);
CommitCompleted();
break;
case State::kCompleted:
// `CommitCompleted()` is already called with a failure and thus safely
// ignore the fetcher callback notification.
break;
case State::kFetcherCallbackCalled:
NOTREACHED();
}
}
// `CommitCompleted()` with `net::OK` must not be called before
// `WorkerScriptFetcher::callback_` to ensure the order:
// 1. `ServiceWorkerContainerHost` pipes are passed to the renderer process
// inside `WorkerScriptFetcher::callback_`
// 2. `ServiceWorkerClient::SetExecutionReady()` is called inside
// `WorkerScriptLoader::CommitCompleted()`
// 3. `client_->OnComplete()` is called which eventually triggers worker
// top-level script evaluation on the renderer process.
// (Note that non-OK `CommitCompleted()` can be called without 1 or 3)
void WorkerScriptLoader::CommitCompleted() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
CHECK_NE(state_, State::kCompleted);
CHECK(complete_status_);
state_ = State::kCompleted;
if (complete_status_->error_code == net::OK && service_worker_handle_ &&
service_worker_handle_->service_worker_client()) {
service_worker_handle_->service_worker_client()->SetExecutionReady();
}
client_->OnComplete(*complete_status_);
// We're done. Ensure we no longer send messages to our client, and no longer
// talk to the loader we're a client of.
client_.reset();
url_loader_client_receiver_.reset();
url_loader_.reset();
}
} // namespace content