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cef/libcef/browser/net_service/browser_urlrequest_impl.cc

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// Copyright (c) 2019 The Chromium Embedded Framework Authors. Portions
// Copyright (c) 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 "libcef/browser/net_service/browser_urlrequest_impl.h"
#include <memory>
#include <string>
#include <utility>
#include "libcef/browser/browser_context.h"
#include "libcef/browser/frame_host_impl.h"
#include "libcef/browser/net_service/url_loader_factory_getter.h"
#include "libcef/browser/request_context_impl.h"
#include "libcef/browser/thread_util.h"
#include "libcef/common/net_service/net_service_util.h"
#include "libcef/common/request_impl.h"
#include "libcef/common/response_impl.h"
#include "libcef/common/task_runner_impl.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string_util.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/global_request_id.h"
#include "content/public/browser/render_frame_host.h"
#include "net/base/mime_util.h"
#include "net/base/net_errors.h"
#include "net/http/http_response_headers.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/cpp/simple_url_loader_stream_consumer.h"
#include "third_party/blink/public/mojom/loader/resource_load_info.mojom.h"
namespace {
const int32_t kInitialRequestID = -2;
// Request ID for requests initiated by CefBrowserURLRequest. request_ids
// generated by child processes are counted up from 0, while browser
// created requests start at -2 and go down from there. (We need to start at -2
// because -1 is used as a special value all over the resource_dispatcher_host
// for uninitialized variables.) The resource_dispatcher_host code path is not
// used when NetworkService is enabled so it's safe to repurpose the -2 and
// below range here.
// This method is only called on the UI thread.
int32_t MakeRequestID() {
static int32_t request_id = kInitialRequestID;
return --request_id;
}
bool IsValidRequestID(int32_t request_id) {
return request_id < kInitialRequestID;
}
// Manages the mapping of request IDs to request objects.
class RequestManager {
public:
RequestManager() = default;
RequestManager(const RequestManager&) = delete;
RequestManager& operator=(const RequestManager&) = delete;
~RequestManager() { DCHECK(map_.empty()); }
void Add(int32_t request_id,
CefRefPtr<CefBrowserURLRequest> request,
CefRefPtr<CefURLRequestClient> client) {
DCHECK_LE(request_id, kInitialRequestID);
base::AutoLock lock_scope(lock_);
DCHECK(map_.find(request_id) == map_.end());
map_.insert(std::make_pair(request_id, std::make_pair(request, client)));
}
void Remove(int32_t request_id) {
if (request_id > kInitialRequestID) {
return;
}
base::AutoLock lock_scope(lock_);
RequestMap::iterator it = map_.find(request_id);
DCHECK(it != map_.end());
map_.erase(it);
}
std::optional<CefBrowserURLRequest::RequestInfo> Get(int32_t request_id) {
if (request_id > kInitialRequestID) {
return std::nullopt;
}
base::AutoLock lock_scope(lock_);
RequestMap::const_iterator it = map_.find(request_id);
if (it != map_.end()) {
return it->second;
}
return std::nullopt;
}
private:
base::Lock lock_;
using RequestMap = std::map<int32_t, CefBrowserURLRequest::RequestInfo>;
RequestMap map_;
};
#if DCHECK_IS_ON()
// Because of DCHECK()s in the object destructor.
base::LazyInstance<RequestManager>::DestructorAtExit g_manager =
LAZY_INSTANCE_INITIALIZER;
#else
base::LazyInstance<RequestManager>::Leaky g_manager = LAZY_INSTANCE_INITIALIZER;
#endif
} // namespace
// CefBrowserURLRequest::Context ----------------------------------------------
class CefBrowserURLRequest::Context
: public network::SimpleURLLoaderStreamConsumer {
public:
Context(CefRefPtr<CefBrowserURLRequest> url_request,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefRequest> request,
CefRefPtr<CefURLRequestClient> client,
CefRefPtr<CefRequestContext> request_context)
: url_request_(url_request),
frame_(frame),
request_(static_cast<CefRequestImpl*>(request.get())),
client_(client),
request_context_(request_context),
task_runner_(CefTaskRunnerImpl::GetCurrentTaskRunner()),
response_(new CefResponseImpl()),
weak_ptr_factory_(this) {
// Mark the request/response objects as read-only.
request_->SetReadOnly(true);
response_->SetReadOnly(true);
}
~Context() override = default;
bool Start() {
DCHECK(CalledOnValidThread());
const GURL& url = GURL(request_->GetURL().ToString());
if (!url.is_valid()) {
return false;
}
if (!request_context_) {
request_context_ = CefRequestContext::GetGlobalContext();
}
auto request_context_impl =
static_cast<CefRequestContextImpl*>(request_context_.get());
// Wait for the browser context to be initialized before continuing.
request_context_impl->ExecuteWhenBrowserContextInitialized(base::BindOnce(
&CefBrowserURLRequest::Context::GetURLLoaderFactoryGetterOnUIThread,
frame_, request_context_, weak_ptr_factory_.GetWeakPtr(),
task_runner_));
return true;
}
void Cancel() {
DCHECK(CalledOnValidThread());
// The request may already be complete or canceled.
if (!url_request_) {
return;
}
DCHECK_EQ(status_, UR_IO_PENDING);
status_ = UR_CANCELED;
response_->SetReadOnly(false);
response_->SetError(ERR_ABORTED);
response_->SetReadOnly(true);
cleanup_immediately_ = true;
OnComplete(false);
}
CefRefPtr<CefRequest> request() const { return request_.get(); }
CefRefPtr<CefURLRequestClient> client() const { return client_; }
CefURLRequest::Status status() const { return status_; }
CefRefPtr<CefResponse> response() const { return response_.get(); }
bool response_was_cached() const { return response_was_cached_; }
inline bool CalledOnValidThread() {
return task_runner_->RunsTasksInCurrentSequence();
}
private:
static void GetURLLoaderFactoryGetterOnUIThread(
CefRefPtr<CefFrame> frame,
CefRefPtr<CefRequestContext> request_context,
base::WeakPtr<CefBrowserURLRequest::Context> self,
scoped_refptr<base::SequencedTaskRunner> task_runner) {
CEF_REQUIRE_UIT();
auto* browser_context =
CefRequestContextImpl::GetBrowserContext(request_context);
CHECK(browser_context);
scoped_refptr<net_service::URLLoaderFactoryGetter> loader_factory_getter;
// Used to route authentication and certificate callbacks through the
// associated StoragePartition instance.
mojo::PendingRemote<network::mojom::URLLoaderNetworkServiceObserver>
url_loader_network_observer;
if (frame) {
// The request will be associated with this frame/browser if it's valid,
// otherwise the request will be canceled.
content::RenderFrameHost* rfh =
static_cast<CefFrameHostImpl*>(frame.get())->GetRenderFrameHost();
if (rfh) {
loader_factory_getter =
net_service::URLLoaderFactoryGetter::Create(rfh, browser_context);
url_loader_network_observer =
static_cast<content::RenderFrameHostImpl*>(rfh)
->CreateURLLoaderNetworkObserver();
}
} else {
loader_factory_getter =
net_service::URLLoaderFactoryGetter::Create(nullptr, browser_context);
url_loader_network_observer =
static_cast<content::StoragePartitionImpl*>(
browser_context->GetDefaultStoragePartition())
->CreateAuthCertObserverForServiceWorker(
content::ChildProcessHost::kInvalidUniqueID);
}
task_runner->PostTask(
FROM_HERE,
base::BindOnce(
&CefBrowserURLRequest::Context::ContinueOnOriginatingThread, self,
MakeRequestID(), loader_factory_getter,
std::move(url_loader_network_observer)));
}
void ContinueOnOriginatingThread(
int32_t request_id,
scoped_refptr<net_service::URLLoaderFactoryGetter> loader_factory_getter,
mojo::PendingRemote<network::mojom::URLLoaderNetworkServiceObserver>
url_loader_network_observer) {
DCHECK(CalledOnValidThread());
// The request may have been canceled.
if (!url_request_) {
return;
}
if (!loader_factory_getter) {
// Cancel the request immediately.
Cancel();
return;
}
DCHECK_EQ(status_, UR_IO_PENDING);
loader_factory_getter_ = loader_factory_getter;
const int request_flags = request_->GetFlags();
// Create the URLLoaderFactory and bind to this thread.
auto loader_factory = loader_factory_getter_->GetURLLoaderFactory();
auto resource_request = std::make_unique<network::ResourceRequest>();
static_cast<CefRequestImpl*>(request_.get())
->Get(resource_request.get(), false);
// Behave the same as a subresource load.
resource_request->resource_type =
static_cast<int>(blink::mojom::ResourceType::kSubResource);
// Set the origin to match the request.
const GURL& url = GURL(request_->GetURL().ToString());
resource_request->request_initiator = url::Origin::Create(url);
if (request_flags & UR_FLAG_ALLOW_STORED_CREDENTIALS) {
// Include SameSite cookies.
resource_request->site_for_cookies =
net::SiteForCookies::FromOrigin(*resource_request->request_initiator);
}
if (url_loader_network_observer) {
resource_request->trusted_params =
network::ResourceRequest::TrustedParams();
resource_request->trusted_params->url_loader_network_observer =
std::move(url_loader_network_observer);
}
// SimpleURLLoader is picky about the body contents. Try to populate them
// correctly below.
auto request_body = resource_request->request_body;
resource_request->request_body = nullptr;
std::string content_type;
std::string method = resource_request->method;
if (request_body) {
if (method == "GET" || method == "HEAD") {
// Fix the method value to allow a request body.
method = "POST";
resource_request->method = method;
request_->SetReadOnly(false);
request_->SetMethod(method);
request_->SetReadOnly(true);
}
resource_request->headers.GetHeader(net::HttpRequestHeaders::kContentType,
&content_type);
}
loader_ = network::SimpleURLLoader::Create(std::move(resource_request),
MISSING_TRAFFIC_ANNOTATION);
// Associate the request with |request_id|.
request_id_ = request_id;
loader_->SetRequestID(request_id);
g_manager.Get().Add(request_id, url_request_, client_);
if (request_body) {
if (request_body->elements()->size() == 1) {
const auto& element = (*request_body->elements())[0];
if (element.type() == network::DataElement::Tag::kFile) {
const auto& file_element = element.As<network::DataElementFile>();
if (content_type.empty()) {
const auto& extension = file_element.path().Extension();
if (!extension.empty()) {
// Requests should not block on the disk! On POSIX this goes to
// disk. http://code.google.com/p/chromium/issues/detail?id=59849
base::ScopedAllowBlockingForTesting allow_blocking;
// Also remove the leading period.
net::GetMimeTypeFromExtension(extension.substr(1), &content_type);
}
}
loader_->AttachFileForUpload(file_element.path(), content_type);
} else if (element.type() == network::DataElement::Tag::kBytes) {
const auto& bytes_element = element.As<network::DataElementBytes>();
const auto& bytes = bytes_element.bytes();
if (content_type.empty()) {
content_type = net_service::kContentTypeApplicationFormURLEncoded;
}
loader_->AttachStringForUpload(
std::string(bytes_element.AsStringPiece()), content_type);
if (request_flags & UR_FLAG_REPORT_UPLOAD_PROGRESS) {
// Report the expected upload data size.
upload_data_size_ = bytes.size();
}
} else {
NOTIMPLEMENTED() << "Unsupported element type: "
<< static_cast<int>(element.type());
}
} else if (request_body->elements()->size() > 1) {
NOTIMPLEMENTED() << "Multi-part form data is not supported";
}
}
// Allow delivery of non-2xx response bodies.
loader_->SetAllowHttpErrorResults(true);
if (!(request_flags & UR_FLAG_NO_RETRY_ON_5XX)) {
// Allow 2 retries on 5xx response or network change.
// TODO(network): Consider exposing configuration of max retries and/or
// RETRY_ON_NETWORK_CHANGE as a separate flag.
loader_->SetRetryOptions(
2, network::SimpleURLLoader::RETRY_ON_5XX |
network::SimpleURLLoader::RETRY_ON_NETWORK_CHANGE);
}
if (request_flags & UR_FLAG_STOP_ON_REDIRECT) {
// The request will be canceled in OnRedirect.
loader_->SetOnRedirectCallback(
base::BindRepeating(&CefBrowserURLRequest::Context::OnRedirect,
weak_ptr_factory_.GetWeakPtr()));
}
if (request_flags & UR_FLAG_REPORT_UPLOAD_PROGRESS) {
loader_->SetOnUploadProgressCallback(
base::BindRepeating(&CefBrowserURLRequest::Context::OnUploadProgress,
weak_ptr_factory_.GetWeakPtr()));
}
if ((request_flags & UR_FLAG_NO_DOWNLOAD_DATA) || method == "HEAD") {
loader_->DownloadHeadersOnly(
loader_factory.get(),
base::BindOnce(&CefBrowserURLRequest::Context::OnHeadersOnly,
weak_ptr_factory_.GetWeakPtr()));
} else {
loader_->SetOnResponseStartedCallback(
base::BindOnce(&CefBrowserURLRequest::Context::OnResponseStarted,
weak_ptr_factory_.GetWeakPtr()));
loader_->SetOnDownloadProgressCallback(base::BindRepeating(
&CefBrowserURLRequest::Context::OnDownloadProgress,
weak_ptr_factory_.GetWeakPtr()));
loader_->DownloadAsStream(loader_factory.get(), this);
}
}
void OnHeadersOnly(scoped_refptr<net::HttpResponseHeaders> headers) {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
cleanup_immediately_ = true;
if (headers) {
response_->SetReadOnly(false);
response_->SetResponseHeaders(*headers);
response_->SetReadOnly(true);
// Match the previous behavior of sending download progress notifications
// for UR_FLAG_NO_DOWNLOAD_DATA requests but not HEAD requests.
if (request_->GetMethod().ToString() != "HEAD") {
download_data_size_ = headers->GetContentLength();
OnDownloadProgress(0);
}
OnComplete(true);
} else {
OnComplete(false);
}
}
void OnRedirect(const GURL& url_before_redirect,
const net::RedirectInfo& redirect_info,
const network::mojom::URLResponseHead& response_head,
std::vector<std::string>* removed_headers) {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
// This method is only called if we intend to stop on redirects.
DCHECK(request_->GetFlags() | UR_FLAG_STOP_ON_REDIRECT);
response_->SetReadOnly(false);
response_->SetURL(redirect_info.new_url.spec());
response_->SetResponseHeaders(*response_head.headers);
response_->SetReadOnly(true);
Cancel();
}
void OnResponseStarted(const GURL& final_url,
const network::mojom::URLResponseHead& response_head) {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
response_->SetReadOnly(false);
response_->SetURL(final_url.spec());
response_->SetResponseHeaders(*response_head.headers);
response_->SetReadOnly(true);
download_data_size_ = response_head.content_length;
}
void OnUploadProgress(uint64_t position, uint64_t total) {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
upload_data_size_ = total;
if (position == total) {
got_upload_progress_complete_ = true;
}
client_->OnUploadProgress(url_request_.get(), position, total);
}
void OnDownloadProgress(uint64_t current) {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
if (response_->GetStatus() == 0) {
// With failed requests this callback may arrive without a proceeding
// OnHeadersOnly or OnResponseStarted.
return;
}
NotifyUploadProgressIfNecessary();
client_->OnDownloadProgress(url_request_.get(), current,
download_data_size_);
}
void NotifyUploadProgressIfNecessary() {
if (!got_upload_progress_complete_ && upload_data_size_ > 0) {
// URLLoader sends upload notifications using a timer and will not send
// a notification if the request completes too quickly. We therefore
// send the notification here if necessary.
client_->OnUploadProgress(url_request_.get(), upload_data_size_,
upload_data_size_);
got_upload_progress_complete_ = true;
}
}
// SimpleURLLoaderStreamConsumer methods:
void OnDataReceived(base::StringPiece string_piece,
base::OnceClosure resume) override {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
client_->OnDownloadData(url_request_.get(), string_piece.data(),
string_piece.length());
std::move(resume).Run();
}
void OnComplete(bool success) override {
DCHECK(CalledOnValidThread());
// The request may already be complete or canceled.
if (!url_request_) {
return;
}
// Status will be UR_IO_PENDING if we're called when the request is complete
// (via SimpleURLLoaderStreamConsumer or OnHeadersOnly). We can only call
// these SimpleURLLoader methods if the request is complete.
if (status_ == UR_IO_PENDING) {
status_ = success ? UR_SUCCESS : UR_FAILED;
response_->SetReadOnly(false);
response_->SetURL(loader_->GetFinalURL().spec());
response_->SetError(static_cast<cef_errorcode_t>(loader_->NetError()));
response_->SetReadOnly(true);
response_was_cached_ = loader_->LoadedFromCache();
}
if (success) {
NotifyUploadProgressIfNecessary();
}
client_->OnRequestComplete(url_request_.get());
// When called via SimpleURLLoaderStreamConsumer we need to cleanup
// asynchronously. If the load is still pending this will also cancel it.
Cleanup();
}
void OnRetry(base::OnceClosure start_retry) override {
DCHECK(CalledOnValidThread());
DCHECK_EQ(status_, UR_IO_PENDING);
std::move(start_retry).Run();
}
void Cleanup() {
DCHECK(CalledOnValidThread());
DCHECK(url_request_);
g_manager.Get().Remove(request_id_);
client_ = nullptr;
request_context_ = nullptr;
// We may be canceled before the loader is created.
if (loader_) {
// Must delete the loader before the factory.
if (cleanup_immediately_) {
// Most SimpleURLLoader callbacks let us delete the URLLoader objects
// immediately.
loader_.reset();
loader_factory_getter_ = nullptr;
} else {
// Delete the URLLoader objects asynchronously on the correct thread.
task_runner_->DeleteSoon(FROM_HERE, std::move(loader_));
task_runner_->ReleaseSoon(FROM_HERE, std::move(loader_factory_getter_));
}
}
// We may be holding the last reference to |url_request_|, destruction of
// which will delete |this|. Use a local variable to keep |url_request_|
// alive until this method returns.
auto url_request = url_request_;
url_request_ = nullptr;
}
// Members only accessed on the initialization thread.
CefRefPtr<CefBrowserURLRequest> url_request_;
CefRefPtr<CefFrame> frame_;
CefRefPtr<CefRequestImpl> request_;
CefRefPtr<CefURLRequestClient> client_;
CefRefPtr<CefRequestContext> request_context_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
scoped_refptr<net_service::URLLoaderFactoryGetter> loader_factory_getter_;
std::unique_ptr<network::SimpleURLLoader> loader_;
int32_t request_id_ = 0;
CefURLRequest::Status status_ = UR_IO_PENDING;
CefRefPtr<CefResponseImpl> response_;
bool response_was_cached_ = false;
int64_t upload_data_size_ = 0;
int64_t download_data_size_ = -1;
bool got_upload_progress_complete_ = false;
bool cleanup_immediately_ = false;
// Must be the last member.
base::WeakPtrFactory<CefBrowserURLRequest::Context> weak_ptr_factory_;
};
// CefBrowserURLRequest -------------------------------------------------------
// static
std::optional<CefBrowserURLRequest::RequestInfo>
CefBrowserURLRequest::FromRequestID(int32_t request_id) {
if (IsValidRequestID(request_id)) {
return g_manager.Get().Get(request_id);
}
return std::nullopt;
}
// static
std::optional<CefBrowserURLRequest::RequestInfo>
CefBrowserURLRequest::FromRequestID(
const content::GlobalRequestID& request_id) {
return FromRequestID(request_id.request_id);
}
CefBrowserURLRequest::CefBrowserURLRequest(
CefRefPtr<CefFrame> frame,
CefRefPtr<CefRequest> request,
CefRefPtr<CefURLRequestClient> client,
CefRefPtr<CefRequestContext> request_context) {
context_ =
std::make_unique<Context>(this, frame, request, client, request_context);
}
CefBrowserURLRequest::~CefBrowserURLRequest() = default;
bool CefBrowserURLRequest::Start() {
if (!VerifyContext()) {
return false;
}
return context_->Start();
}
CefRefPtr<CefRequest> CefBrowserURLRequest::GetRequest() {
if (!VerifyContext()) {
return nullptr;
}
return context_->request();
}
CefRefPtr<CefURLRequestClient> CefBrowserURLRequest::GetClient() {
if (!VerifyContext()) {
return nullptr;
}
return context_->client();
}
CefURLRequest::Status CefBrowserURLRequest::GetRequestStatus() {
if (!VerifyContext()) {
return UR_UNKNOWN;
}
return context_->status();
}
CefURLRequest::ErrorCode CefBrowserURLRequest::GetRequestError() {
if (!VerifyContext()) {
return ERR_NONE;
}
return context_->response()->GetError();
}
CefRefPtr<CefResponse> CefBrowserURLRequest::GetResponse() {
if (!VerifyContext()) {
return nullptr;
}
return context_->response();
}
bool CefBrowserURLRequest::ResponseWasCached() {
if (!VerifyContext()) {
return false;
}
return context_->response_was_cached();
}
void CefBrowserURLRequest::Cancel() {
if (!VerifyContext()) {
return;
}
return context_->Cancel();
}
bool CefBrowserURLRequest::VerifyContext() {
if (!context_->CalledOnValidThread()) {
DCHECK(false) << "called on invalid thread";
return false;
}
return true;
}
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