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// Copyright (c) 2019 The Chromium Embedded Framework 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 "cef/libcef/browser/net_service/resource_request_handler_wrapper.h"
#include <memory>
#include "base/memory/raw_ptr.h"
#include "cef/libcef/browser/browser_host_base.h"
#include "cef/libcef/browser/context.h"
#include "cef/libcef/browser/iothread_state.h"
#include "cef/libcef/browser/net_service/cookie_helper.h"
#include "cef/libcef/browser/net_service/proxy_url_loader_factory.h"
#include "cef/libcef/browser/net_service/resource_handler_wrapper.h"
#include "cef/libcef/browser/net_service/response_filter_wrapper.h"
#include "cef/libcef/browser/prefs/browser_prefs.h"
#include "cef/libcef/browser/thread_util.h"
#include "cef/libcef/common/app_manager.h"
#include "cef/libcef/common/net/scheme_registration.h"
#include "cef/libcef/common/net_service/net_service_util.h"
#include "cef/libcef/common/request_impl.h"
#include "cef/libcef/common/response_impl.h"
#include "chrome/browser/profiles/profile.h"
#include "components/language/core/browser/pref_names.h"
#include "components/prefs/pref_service.h"
#include "content/browser/renderer_host/frame_tree_node.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/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "net/base/load_flags.h"
#include "net/http/http_status_code.h"
#include "third_party/blink/public/mojom/loader/resource_load_info.mojom-shared.h"
#include "ui/base/page_transition_types.h"
#include "url/origin.h"
namespace net_service {
namespace {
const int kLoadNoCookiesFlags =
net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES;
class RequestCallbackWrapper : public CefCallback {
public:
using Callback = base::OnceCallback<void(bool /* allow */)>;
explicit RequestCallbackWrapper(Callback callback)
: callback_(std::move(callback)),
work_thread_task_runner_(
base::SequencedTaskRunner::GetCurrentDefault()) {}
RequestCallbackWrapper(const RequestCallbackWrapper&) = delete;
RequestCallbackWrapper& operator=(const RequestCallbackWrapper&) = delete;
~RequestCallbackWrapper() override {
if (!callback_.is_null()) {
// Make sure it executes on the correct thread.
work_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(std::move(callback_), true));
}
}
void Continue() override { ContinueNow(true); }
void Cancel() override { ContinueNow(false); }
private:
void ContinueNow(bool allow) {
if (!work_thread_task_runner_->RunsTasksInCurrentSequence()) {
work_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&RequestCallbackWrapper::ContinueNow, this, allow));
return;
}
if (!callback_.is_null()) {
std::move(callback_).Run(allow);
}
}
Callback callback_;
scoped_refptr<base::SequencedTaskRunner> work_thread_task_runner_;
IMPLEMENT_REFCOUNTING(RequestCallbackWrapper);
};
class InterceptedRequestHandlerWrapper : public InterceptedRequestHandler {
public:
struct RequestState {
RequestState() = default;
void Reset(CefRefPtr<CefResourceRequestHandler> handler,
CefRefPtr<CefSchemeHandlerFactory> scheme_factory,
CefRefPtr<CefRequestImpl> pending_request,
network::ResourceRequest* request,
bool request_was_redirected,
CancelRequestCallback cancel_callback) {
handler_ = handler;
scheme_factory_ = scheme_factory;
cookie_filter_ = nullptr;
pending_request_ = pending_request;
pending_response_ = nullptr;
request_ = request;
request_was_redirected_ = request_was_redirected;
was_custom_handled_ = false;
cancel_callback_ = std::move(cancel_callback);
}
CefRefPtr<CefResourceRequestHandler> handler_;
CefRefPtr<CefSchemeHandlerFactory> scheme_factory_;
CefRefPtr<CefCookieAccessFilter> cookie_filter_;
CefRefPtr<CefRequestImpl> pending_request_;
CefRefPtr<CefResponseImpl> pending_response_;
raw_ptr<network::ResourceRequest> request_;
bool request_was_redirected_ = false;
bool was_custom_handled_ = false;
bool accept_language_added_ = false;
CancelRequestCallback cancel_callback_;
};
struct PendingRequest {
PendingRequest(int32_t request_id,
network::ResourceRequest* request,
bool request_was_redirected,
OnBeforeRequestResultCallback callback,
CancelRequestCallback cancel_callback)
: id_(request_id),
request_(request),
request_was_redirected_(request_was_redirected),
callback_(std::move(callback)),
cancel_callback_(std::move(cancel_callback)) {}
~PendingRequest() {
if (cancel_callback_) {
std::move(cancel_callback_).Run(net::ERR_ABORTED);
}
}
void Run(InterceptedRequestHandlerWrapper* self) {
self->OnBeforeRequest(id_, request_, request_was_redirected_,
std::move(callback_), std::move(cancel_callback_));
request_ = nullptr;
}
const int32_t id_;
raw_ptr<network::ResourceRequest, DisableDanglingPtrDetection> request_;
const bool request_was_redirected_;
OnBeforeRequestResultCallback callback_;
CancelRequestCallback cancel_callback_;
};
// Observer to receive notification of CEF context or associated browser
// destruction. Only one of the *Destroyed() methods will be called.
class DestructionObserver : public CefBrowserHostBase::Observer,
public CefContext::Observer {
public:
explicit DestructionObserver(CefBrowserHostBase* browser) {
if (browser) {
browser_info_ = browser->browser_info();
browser->AddObserver(this);
} else {
CefContext::Get()->AddObserver(this);
}
}
DestructionObserver(const DestructionObserver&) = delete;
DestructionObserver& operator=(const DestructionObserver&) = delete;
~DestructionObserver() override {
CEF_REQUIRE_UIT();
if (!registered_) {
return;
}
// Verify that the browser or context still exists before attempting to
// remove the observer.
if (browser_info_) {
auto browser = browser_info_->browser();
if (browser) {
browser->RemoveObserver(this);
}
} else if (CefContext::Get()) {
// Network requests may be torn down during shutdown, so we can't check
// CONTEXT_STATE_VALID() here.
CefContext::Get()->RemoveObserver(this);
}
}
void SetWrapper(base::WeakPtr<InterceptedRequestHandlerWrapper> wrapper) {
CEF_REQUIRE_IOT();
wrapper_ = wrapper;
}
void OnBrowserDestroyed(CefBrowserHostBase* browser) override {
CEF_REQUIRE_UIT();
browser->RemoveObserver(this);
registered_ = false;
browser_info_ = nullptr;
NotifyOnDestroyed();
}
void OnContextDestroyed() override {
CEF_REQUIRE_UIT();
CefContext::Get()->RemoveObserver(this);
registered_ = false;
NotifyOnDestroyed();
}
private:
void NotifyOnDestroyed() {
if (wrapper_.MaybeValid()) {
// This will be a no-op if the WeakPtr is invalid.
CEF_POST_TASK(
CEF_IOT,
base::BindOnce(&InterceptedRequestHandlerWrapper::OnDestroyed,
wrapper_));
}
}
scoped_refptr<CefBrowserInfo> browser_info_;
bool registered_ = true;
base::WeakPtr<InterceptedRequestHandlerWrapper> wrapper_;
};
// Holds state information for InterceptedRequestHandlerWrapper. State is
// initialized on the UI thread and later passed to the *Wrapper object on
// the IO thread.
struct InitState {
InitState() = default;
~InitState() {
if (destruction_observer_) {
if (initialized_) {
// Clear the reference added in
// InterceptedRequestHandlerWrapper::SetInitialized().
destruction_observer_->SetWrapper(nullptr);
}
DeleteDestructionObserver();
}
}
void Initialize(content::BrowserContext* browser_context,
CefRefPtr<CefBrowserHostBase> browser,
CefRefPtr<CefFrame> frame,
const content::GlobalRenderFrameHostId& global_id,
bool is_navigation,
bool is_download,
const url::Origin& request_initiator,
const base::RepeatingClosure& unhandled_request_callback) {
CEF_REQUIRE_UIT();
auto profile = Profile::FromBrowserContext(browser_context);
auto cef_browser_context = CefBrowserContext::FromProfile(profile);
browser_context_getter_ = cef_browser_context->getter();
iothread_state_ = cef_browser_context->iothread_state();
CHECK(iothread_state_);
cookieable_schemes_ = cef_browser_context->GetCookieableSchemes();
// We register to be notified of CEF context or browser destruction so
// that we can stop accepting new requests and cancel pending/in-progress
// requests in a timely manner (e.g. before we start asserting about
// leaked objects during CEF shutdown).
destruction_observer_ =
std::make_unique<DestructionObserver>(browser.get());
if (browser) {
// These references will be released in OnDestroyed().
browser_ = browser;
frame_ = frame;
}
global_id_ = global_id;
is_navigation_ = is_navigation;
is_download_ = is_download;
request_initiator_ = request_initiator.Serialize();
unhandled_request_callback_ = unhandled_request_callback;
// Default values for standard headers.
accept_language_ = browser_prefs::GetAcceptLanguageList(profile);
DCHECK(!accept_language_.empty());
user_agent_ =
CefAppManager::Get()->GetContentClient()->browser()->GetUserAgent();
DCHECK(!user_agent_.empty());
}
void DeleteDestructionObserver() {
DCHECK(destruction_observer_);
CEF_POST_TASK(
CEF_UIT,
base::BindOnce(&InitState::DeleteDestructionObserverOnUIThread,
std::move(destruction_observer_)));
}
static void DeleteDestructionObserverOnUIThread(
std::unique_ptr<DestructionObserver> observer) {}
// Only accessed on the UI thread.
CefBrowserContext::Getter browser_context_getter_;
bool initialized_ = false;
CefRefPtr<CefBrowserHostBase> browser_;
CefRefPtr<CefFrame> frame_;
scoped_refptr<CefIOThreadState> iothread_state_;
CefBrowserContext::CookieableSchemes cookieable_schemes_;
content::GlobalRenderFrameHostId global_id_;
bool is_navigation_ = true;
bool is_download_ = false;
CefString request_initiator_;
base::RepeatingClosure unhandled_request_callback_;
// Default values for standard headers.
std::string accept_language_;
std::string user_agent_;
// Used to route authentication and certificate callbacks through the
// associated StoragePartition instance.
mojo::PendingRemote<network::mojom::URLLoaderNetworkServiceObserver>
url_loader_network_observer_;
bool did_try_create_url_loader_network_observer_ = false;
// Used to receive destruction notification.
std::unique_ptr<DestructionObserver> destruction_observer_;
};
// Manages InterceptedRequestHandlerWrapper initialization. The *Wrapper
// object is owned by ProxyURLLoaderFactory and may be deleted before
// SetInitialized() is called.
struct InitHelper : base::RefCountedThreadSafe<InitHelper> {
public:
explicit InitHelper(InterceptedRequestHandlerWrapper* wrapper)
: wrapper_(wrapper) {}
InitHelper(const InitHelper&) = delete;
InitHelper& operator=(const InitHelper&) = delete;
void MaybeSetInitialized(std::unique_ptr<InitState> init_state) {
CEF_POST_TASK(CEF_IOT, base::BindOnce(&InitHelper::SetInitialized, this,
std::move(init_state)));
}
void Disconnect() {
base::AutoLock lock_scope(lock_);
wrapper_ = nullptr;
}
private:
void SetInitialized(std::unique_ptr<InitState> init_state) {
base::AutoLock lock_scope(lock_);
// May be nullptr if the InterceptedRequestHandlerWrapper has already
// been deleted.
if (!wrapper_) {
return;
}
wrapper_->SetInitialized(std::move(init_state));
wrapper_ = nullptr;
}
base::Lock lock_;
raw_ptr<InterceptedRequestHandlerWrapper> wrapper_;
};
InterceptedRequestHandlerWrapper()
: init_helper_(base::MakeRefCounted<InitHelper>(this)),
weak_ptr_factory_(this) {}
InterceptedRequestHandlerWrapper(const InterceptedRequestHandlerWrapper&) =
delete;
InterceptedRequestHandlerWrapper& operator=(
const InterceptedRequestHandlerWrapper&) = delete;
~InterceptedRequestHandlerWrapper() override {
CEF_REQUIRE_IOT();
// There should be no in-progress requests during destruction.
DCHECK(request_map_.empty());
// Don't continue with initialization if we get deleted before
// SetInitialized is called asynchronously.
init_helper_->Disconnect();
}
scoped_refptr<InitHelper> init_helper() const { return init_helper_; }
void SetInitialized(std::unique_ptr<InitState> init_state) {
CEF_REQUIRE_IOT();
DCHECK(!init_state_);
init_state_ = std::move(init_state);
// Check that the CEF context or associated browser was not destroyed
// between the calls to Initialize and SetInitialized, in which case
// we won't get an OnDestroyed callback from DestructionObserver.
if (init_state_->browser_) {
if (!init_state_->browser_->browser_info()->browser()) {
OnDestroyed();
return;
}
} else if (!CONTEXT_STATE_VALID()) {
OnDestroyed();
return;
}
init_state_->initialized_ = true;
init_state_->destruction_observer_->SetWrapper(
weak_ptr_factory_.GetWeakPtr());
// Continue any pending requests.
if (!pending_requests_.empty()) {
for (const auto& request : pending_requests_) {
request->Run(this);
}
pending_requests_.clear();
}
}
static void TryCreateURLLoaderNetworkObserver(
std::unique_ptr<PendingRequest> pending_request,
CefRefPtr<CefFrame> frame,
const CefBrowserContext::Getter& browser_context_getter,
base::WeakPtr<InterceptedRequestHandlerWrapper> self) {
CEF_REQUIRE_UIT();
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::RenderFrameHostImpl* rfh =
static_cast<content::RenderFrameHostImpl*>(
static_cast<CefFrameHostImpl*>(frame.get())
->GetRenderFrameHost());
if (rfh) {
if (rfh->frame_tree_node() &&
rfh->frame_tree_node()->navigation_request()) {
// Associate the Observer with the current NavigationRequest. This is
// necessary for |is_main_frame_request| to report true (the expected
// value) in AllowCertificateError.
// TODO(cef): This approach for retrieving the NavigationRequest is
// deprecated, see https://crbug.com/1179502#c36.
url_loader_network_observer =
rfh->GetStoragePartition()
->CreateURLLoaderNetworkObserverForNavigationRequest(
*(rfh->frame_tree_node()->navigation_request()));
} else {
// Associate the Observer with the RenderFrameHost.
url_loader_network_observer = rfh->CreateURLLoaderNetworkObserver();
}
}
} else {
auto cef_browser_context = browser_context_getter.Run();
auto browser_context = cef_browser_context
? cef_browser_context->AsBrowserContext()
: nullptr;
if (browser_context) {
url_loader_network_observer =
static_cast<content::StoragePartitionImpl*>(
browser_context->GetDefaultStoragePartition())
->CreateAuthCertObserverForServiceWorker(
content::ChildProcessHost::kInvalidUniqueID);
}
}
CEF_POST_TASK(CEF_IOT,
base::BindOnce(&InterceptedRequestHandlerWrapper::
ContinueCreateURLLoaderNetworkObserver,
self, std::move(pending_request),
std::move(url_loader_network_observer)));
}
void ContinueCreateURLLoaderNetworkObserver(
std::unique_ptr<PendingRequest> pending_request,
mojo::PendingRemote<network::mojom::URLLoaderNetworkServiceObserver>
url_loader_network_observer) {
CEF_REQUIRE_IOT();
DCHECK(!init_state_->did_try_create_url_loader_network_observer_);
init_state_->did_try_create_url_loader_network_observer_ = true;
init_state_->url_loader_network_observer_ =
std::move(url_loader_network_observer);
pending_request->Run(this);
}
// InterceptedRequestHandler methods:
void OnBeforeRequest(int32_t request_id,
network::ResourceRequest* request,
bool request_was_redirected,
OnBeforeRequestResultCallback callback,
CancelRequestCallback cancel_callback) override {
CEF_REQUIRE_IOT();
if (shutting_down_) {
// Abort immediately.
std::move(cancel_callback).Run(net::ERR_ABORTED);
return;
}
if (!init_state_) {
// Queue requests until we're initialized.
pending_requests_.push_back(std::make_unique<PendingRequest>(
request_id, request, request_was_redirected, std::move(callback),
std::move(cancel_callback)));
return;
}
if (request->trusted_params &&
!request->trusted_params->url_loader_network_observer &&
!init_state_->did_try_create_url_loader_network_observer_) {
// Restarted/redirected requests won't already have an observer, so we
// need to create one.
CEF_POST_TASK(
CEF_UIT,
base::BindOnce(&InterceptedRequestHandlerWrapper::
TryCreateURLLoaderNetworkObserver,
std::make_unique<PendingRequest>(
request_id, request, request_was_redirected,
std::move(callback), std::move(cancel_callback)),
init_state_->frame_,
init_state_->browser_context_getter_,
weak_ptr_factory_.GetWeakPtr()));
return;
}
// State may already exist for restarted requests.
RequestState* state = GetOrCreateState(request_id);
if (init_state_->did_try_create_url_loader_network_observer_) {
if (init_state_->url_loader_network_observer_) {
request->trusted_params->url_loader_network_observer =
std::move(init_state_->url_loader_network_observer_);
}
// Reset state so that the observer will be recreated on the next
// restart/redirect.
init_state_->did_try_create_url_loader_network_observer_ = false;
}
// Add standard headers, if currently unspecified.
if (!request->headers.HasHeader(net::HttpRequestHeaders::kAcceptLanguage)) {
request->headers.SetHeaderIfMissing(
net::HttpRequestHeaders::kAcceptLanguage,
init_state_->accept_language_);
state->accept_language_added_ = true;
}
request->headers.SetHeaderIfMissing(net::HttpRequestHeaders::kUserAgent,
init_state_->user_agent_);
const bool is_external = IsExternalRequest(request);
// External requests will not have a default handler.
bool intercept_only = is_external;
CefRefPtr<CefRequestImpl> requestPtr;
CefRefPtr<CefResourceRequestHandler> handler =
GetHandler(request_id, request, &intercept_only, requestPtr);
CefRefPtr<CefSchemeHandlerFactory> scheme_factory =
init_state_->iothread_state_->GetSchemeHandlerFactory(request->url);
if (scheme_factory && !requestPtr) {
requestPtr = MakeRequest(request, request_id, true);
}
// True if there's a possibility that the client might handle the request.
const bool maybe_intercept_request = handler || scheme_factory;
if (!maybe_intercept_request && requestPtr) {
requestPtr = nullptr;
}
// May have a handler and/or scheme factory.
state->Reset(handler, scheme_factory, requestPtr, request,
request_was_redirected, std::move(cancel_callback));
if (handler) {
state->cookie_filter_ = handler->GetCookieAccessFilter(
init_state_->browser_, init_state_->frame_, requestPtr.get());
}
auto exec_callback =
base::BindOnce(std::move(callback), maybe_intercept_request,
is_external ? true : intercept_only);
if (!maybe_intercept_request) {
// Cookies will be handled by the NetworkService.
std::move(exec_callback).Run();
return;
}
MaybeLoadCookies(request_id, state, std::move(exec_callback));
}
void MaybeLoadCookies(int32_t request_id,
RequestState* state,
base::OnceClosure callback) {
CEF_REQUIRE_IOT();
if (!cookie_helper::IsCookieableScheme(state->request_->url,
init_state_->cookieable_schemes_)) {
// The scheme does not support cookies.
std::move(callback).Run();
return;
}
// We need to load/save cookies ourselves for custom-handled requests, or
// if we're using a cookie filter.
auto allow_cookie_callback =
state->cookie_filter_
? base::BindRepeating(
&InterceptedRequestHandlerWrapper::AllowCookieLoad,
weak_ptr_factory_.GetWeakPtr(), request_id)
: base::BindRepeating(
&InterceptedRequestHandlerWrapper::AllowCookieAlways);
auto done_cookie_callback = base::BindOnce(
&InterceptedRequestHandlerWrapper::ContinueWithLoadedCookies,
weak_ptr_factory_.GetWeakPtr(), request_id, std::move(callback));
cookie_helper::LoadCookies(init_state_->browser_context_getter_,
*(state->request_), allow_cookie_callback,
std::move(done_cookie_callback));
}
static void AllowCookieAlways(const net::CanonicalCookie& cookie,
bool* allow) {
*allow = true;
}
void AllowCookieLoad(int32_t request_id,
const net::CanonicalCookie& cookie,
bool* allow) {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled while the async callback was
// pending.
return;
}
DCHECK(state->cookie_filter_);
CefCookie cef_cookie;
if (net_service::MakeCefCookie(cookie, cef_cookie)) {
*allow = state->cookie_filter_->CanSendCookie(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), cef_cookie);
}
}
void ContinueWithLoadedCookies(int32_t request_id,
base::OnceClosure callback,
int total_count,
net::CookieList allowed_cookies) {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled while the async callback was
// pending.
return;
}
if (state->cookie_filter_) {
// Also add/save cookies ourselves for default-handled network requests
// so that we can filter them. This will be a no-op for custom-handled
// requests.
state->request_->load_flags |= kLoadNoCookiesFlags;
}
if (!allowed_cookies.empty()) {
const std::string& cookie_line =
net::CanonicalCookie::BuildCookieLine(allowed_cookies);
state->request_->headers.SetHeader(net::HttpRequestHeaders::kCookie,
cookie_line);
state->pending_request_->SetReadOnly(false);
state->pending_request_->SetHeaderByName(net::HttpRequestHeaders::kCookie,
cookie_line, true);
state->pending_request_->SetReadOnly(true);
}
std::move(callback).Run();
}
void ShouldInterceptRequest(
int32_t request_id,
network::ResourceRequest* request,
ShouldInterceptRequestResultCallback callback) override {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled during destruction.
return;
}
// Must have a handler and/or scheme factory.
DCHECK(state->handler_ || state->scheme_factory_);
DCHECK(state->pending_request_);
if (state->handler_) {
// The client may modify |pending_request_| before executing the callback.
state->pending_request_->SetReadOnly(false);
state->pending_request_->SetTrackChanges(true,
true /* backup_on_change */);
CefRefPtr<RequestCallbackWrapper> callbackPtr =
new RequestCallbackWrapper(base::BindOnce(
&InterceptedRequestHandlerWrapper::ContinueShouldInterceptRequest,
weak_ptr_factory_.GetWeakPtr(), request_id, std::move(callback)));
cef_return_value_t retval = state->handler_->OnBeforeResourceLoad(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), callbackPtr.get());
if (retval != RV_CONTINUE_ASYNC) {
if (retval == RV_CONTINUE) {
// Continue the request immediately.
callbackPtr->Continue();
} else {
// Cancel the request immediately.
callbackPtr->Cancel();
}
}
} else {
// The scheme factory may choose to handle it.
ContinueShouldInterceptRequest(request_id, std::move(callback), true);
}
}
void ContinueShouldInterceptRequest(
int32_t request_id,
ShouldInterceptRequestResultCallback callback,
bool allow) {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled while the async callback was
// pending.
return;
}
// Must have a handler and/or scheme factory.
DCHECK(state->handler_ || state->scheme_factory_);
DCHECK(state->pending_request_);
if (state->handler_) {
if (allow) {
// Apply any |requestPtr| changes to |request|.
state->pending_request_->Get(state->request_, true /* changed_only */);
}
const bool redirect =
(state->pending_request_->GetChanges() & CefRequestImpl::kChangedUrl);
if (redirect) {
// Revert any changes for now. We'll get them back after the redirect.
state->pending_request_->RevertChanges();
}
state->pending_request_->SetReadOnly(true);
state->pending_request_->SetTrackChanges(false);
if (!allow) {
// Cancel the request.
if (state->cancel_callback_) {
std::move(state->cancel_callback_).Run(net::ERR_ABORTED);
}
return;
}
if (redirect) {
// Performing a redirect.
std::move(callback).Run(nullptr);
return;
}
}
CefRefPtr<CefResourceHandler> resource_handler;
if (state->handler_) {
// Does the client want to handle the request?
resource_handler = state->handler_->GetResourceHandler(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get());
}
if (!resource_handler && state->scheme_factory_) {
// Does the scheme factory want to handle the request?
resource_handler = state->scheme_factory_->Create(
init_state_->browser_, init_state_->frame_,
state->request_->url.scheme(), state->pending_request_.get());
}
std::unique_ptr<ResourceResponse> resource_response;
if (resource_handler) {
resource_response = CreateResourceResponse(request_id, resource_handler);
DCHECK(resource_response);
state->was_custom_handled_ = true;
} else if (state->accept_language_added_) {
// The request will be handled by the NetworkService. Remove the
// "Accept-Language" header here so that it can be re-added in
// URLRequestHttpJob::AddExtraHeaders with correct ordering applied.
state->request_->headers.RemoveHeader(
net::HttpRequestHeaders::kAcceptLanguage);
}
// Continue the request.
std::move(callback).Run(std::move(resource_response));
}
void ProcessResponseHeaders(int32_t request_id,
const network::ResourceRequest& request,
const GURL& redirect_url,
net::HttpResponseHeaders* headers) override {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled during destruction.
return;
}
if (!state->handler_) {
return;
}
if (!state->pending_response_) {
state->pending_response_ = new CefResponseImpl();
} else {
state->pending_response_->SetReadOnly(false);
}
if (headers) {
state->pending_response_->SetResponseHeaders(*headers);
}
state->pending_response_->SetReadOnly(true);
}
void OnRequestResponse(int32_t request_id,
network::ResourceRequest* request,
net::HttpResponseHeaders* headers,
std::optional<net::RedirectInfo> redirect_info,
OnRequestResponseResultCallback callback) override {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled during destruction.
return;
}
if (state->cookie_filter_) {
// Remove the flags that were added in ContinueWithLoadedCookies.
request->load_flags &= ~kLoadNoCookiesFlags;
}
if (!state->handler_) {
// Cookies may come from a scheme handler.
MaybeSaveCookies(
request_id, state, headers,
base::BindOnce(
std::move(callback), ResponseMode::CONTINUE, nullptr,
redirect_info.has_value() ? redirect_info->new_url : GURL()));
return;
}
DCHECK(state->pending_request_);
DCHECK(state->pending_response_);
if (redirect_info.has_value()) {
HandleRedirect(request_id, state, headers, *redirect_info,
std::move(callback));
} else {
HandleResponse(request_id, state, headers, std::move(callback));
}
}
void HandleRedirect(int32_t request_id,
RequestState* state,
net::HttpResponseHeaders* headers,
const net::RedirectInfo& redirect_info,
OnRequestResponseResultCallback callback) {
GURL new_url = redirect_info.new_url;
CefString newUrl = redirect_info.new_url.spec();
CefString oldUrl = newUrl;
bool url_changed = false;
state->handler_->OnResourceRedirect(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), state->pending_response_.get(), newUrl);
if (newUrl != oldUrl) {
// Also support relative URLs.
const GURL& url = redirect_info.new_url.Resolve(newUrl.ToString());
if (url.is_valid()) {
url_changed = true;
new_url = url;
}
}
// Update the |pending_request_| object with the new info.
state->pending_request_->SetReadOnly(false);
state->pending_request_->Set(redirect_info);
if (url_changed) {
state->pending_request_->SetURL(new_url.spec());
}
state->pending_request_->SetReadOnly(true);
auto exec_callback = base::BindOnce(
std::move(callback), ResponseMode::CONTINUE, nullptr, new_url);
MaybeSaveCookies(request_id, state, headers, std::move(exec_callback));
}
void HandleResponse(int32_t request_id,
RequestState* state,
net::HttpResponseHeaders* headers,
OnRequestResponseResultCallback callback) {
// The client may modify |pending_request_| in OnResourceResponse.
state->pending_request_->SetReadOnly(false);
state->pending_request_->SetTrackChanges(true, true /* backup_on_change */);
auto response_mode = ResponseMode::CONTINUE;
GURL new_url;
if (state->handler_->OnResourceResponse(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), state->pending_response_.get())) {
// The request may have been modified.
const auto changes = state->pending_request_->GetChanges();
if (changes) {
state->pending_request_->Get(state->request_, true /* changed_only */);
if (changes & CefRequestImpl::kChangedUrl) {
// Redirect to the new URL.
new_url = GURL(state->pending_request_->GetURL().ToString());
} else {
// Restart the request.
response_mode = ResponseMode::RESTART;
}
}
}
// Revert any changes for now. We'll get them back after the redirect or
// restart.
state->pending_request_->RevertChanges();
state->pending_request_->SetReadOnly(true);
state->pending_request_->SetTrackChanges(false);
auto exec_callback =
base::BindOnce(std::move(callback), response_mode, nullptr, new_url);
if (response_mode == ResponseMode::RESTART) {
// Get any cookies after the restart.
std::move(exec_callback).Run();
return;
}
MaybeSaveCookies(request_id, state, headers, std::move(exec_callback));
}
void MaybeSaveCookies(int32_t request_id,
RequestState* state,
net::HttpResponseHeaders* headers,
base::OnceClosure callback) {
CEF_REQUIRE_IOT();
if (!state->cookie_filter_ && !state->was_custom_handled_) {
// The NetworkService saves the cookies for default-handled requests.
std::move(callback).Run();
return;
}
if (!cookie_helper::IsCookieableScheme(state->request_->url,
init_state_->cookieable_schemes_)) {
// The scheme does not support cookies.
std::move(callback).Run();
return;
}
// We need to load/save cookies ourselves for custom-handled requests, or
// if we're using a cookie filter.
auto allow_cookie_callback =
state->cookie_filter_
? base::BindRepeating(
&InterceptedRequestHandlerWrapper::AllowCookieSave,
weak_ptr_factory_.GetWeakPtr(), request_id)
: base::BindRepeating(
&InterceptedRequestHandlerWrapper::AllowCookieAlways);
auto done_cookie_callback = base::BindOnce(
&InterceptedRequestHandlerWrapper::ContinueWithSavedCookies,
weak_ptr_factory_.GetWeakPtr(), request_id, std::move(callback));
cookie_helper::SaveCookies(
init_state_->browser_context_getter_, *(state->request_), headers,
allow_cookie_callback, std::move(done_cookie_callback));
}
void AllowCookieSave(int32_t request_id,
const net::CanonicalCookie& cookie,
bool* allow) {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled while the async callback was
// pending.
return;
}
DCHECK(state->cookie_filter_);
CefCookie cef_cookie;
if (net_service::MakeCefCookie(cookie, cef_cookie)) {
*allow = state->cookie_filter_->CanSaveCookie(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), state->pending_response_.get(),
cef_cookie);
}
}
void ContinueWithSavedCookies(int32_t request_id,
base::OnceClosure callback,
int total_count,
net::CookieList allowed_cookies) {
CEF_REQUIRE_IOT();
std::move(callback).Run();
}
mojo::ScopedDataPipeConsumerHandle OnFilterResponseBody(
int32_t request_id,
const network::ResourceRequest& request,
mojo::ScopedDataPipeConsumerHandle body) override {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled during destruction.
return body;
}
if (state->handler_) {
auto filter = state->handler_->GetResourceResponseFilter(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), state->pending_response_.get());
if (filter) {
return CreateResponseFilterHandler(
filter, std::move(body),
base::BindOnce(&InterceptedRequestHandlerWrapper::OnFilterError,
weak_ptr_factory_.GetWeakPtr(), request_id));
}
}
return body;
}
void OnFilterError(int32_t request_id) {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been canceled while the async callback was
// pending.
return;
}
if (state->cancel_callback_) {
std::move(state->cancel_callback_).Run(net::ERR_CONTENT_DECODING_FAILED);
}
}
void OnRequestComplete(
int32_t request_id,
const network::ResourceRequest& request,
const network::URLLoaderCompletionStatus& status) override {
CEF_REQUIRE_IOT();
RequestState* state = GetState(request_id);
if (!state) {
// The request may have been aborted during initialization or canceled
// during destruction. This method will always be called before a request
// is deleted, so if the request is currently pending also remove it from
// the list.
if (!pending_requests_.empty()) {
PendingRequests::iterator it = pending_requests_.begin();
for (; it != pending_requests_.end(); ++it) {
if ((*it)->id_ == request_id) {
pending_requests_.erase(it);
break;
}
}
}
return;
}
const bool is_external = IsExternalRequest(&request);
// Redirection of standard custom schemes is handled with a restart, so we
// get completion notifications for both the original (redirected) request
// and the final request. Don't report completion of the redirected request.
const bool ignore_result = is_external && request.url.IsStandard() &&
status.error_code == net::ERR_ABORTED &&
state->pending_response_.get() &&
net::HttpResponseHeaders::IsRedirectResponseCode(
state->pending_response_->GetStatus());
if (state->handler_ && !ignore_result) {
DCHECK(state->pending_request_);
CallHandlerOnComplete(state, status);
if (status.error_code != 0 && status.error_code != ERR_ABORTED &&
is_external) {
bool allow_os_execution = false;
state->handler_->OnProtocolExecution(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), allow_os_execution);
if (allow_os_execution && init_state_->unhandled_request_callback_) {
CEF_POST_TASK(TID_UI, init_state_->unhandled_request_callback_);
}
}
}
RemoveState(request_id);
}
private:
void CallHandlerOnComplete(RequestState* state,
const network::URLLoaderCompletionStatus& status) {
if (!state->handler_ || !state->pending_request_) {
return;
}
// The request object may be currently flagged as writable in cases where we
// abort a request that is waiting on a pending callack.
if (!state->pending_request_->IsReadOnly()) {
state->pending_request_->SetReadOnly(true);
}
if (!state->pending_response_) {
// If the request failed there may not be a response object yet.
state->pending_response_ = new CefResponseImpl();
} else {
state->pending_response_->SetReadOnly(false);
}
state->pending_response_->SetError(
static_cast<cef_errorcode_t>(status.error_code));
state->pending_response_->SetReadOnly(true);
state->handler_->OnResourceLoadComplete(
init_state_->browser_, init_state_->frame_,
state->pending_request_.get(), state->pending_response_.get(),
status.error_code == 0 ? UR_SUCCESS : UR_FAILED,
status.encoded_body_length);
}
// Returns the handler, if any, that should be used for this request.
CefRefPtr<CefResourceRequestHandler> GetHandler(
int32_t request_id,
network::ResourceRequest* request,
bool* intercept_only,
CefRefPtr<CefRequestImpl>& requestPtr) const {
CefRefPtr<CefResourceRequestHandler> handler;
if (init_state_->browser_) {
// Maybe the browser's client wants to handle it?
CefRefPtr<CefClient> client =
init_state_->browser_->GetHost()->GetClient();
if (client) {
CefRefPtr<CefRequestHandler> request_handler =
client->GetRequestHandler();
if (request_handler) {
requestPtr = MakeRequest(request, request_id, true);
handler = request_handler->GetResourceRequestHandler(
init_state_->browser_, init_state_->frame_, requestPtr.get(),
init_state_->is_navigation_, init_state_->is_download_,
init_state_->request_initiator_, *intercept_only);
}
}
}
if (!handler) {
// Maybe the request context wants to handle it?
CefRefPtr<CefRequestContextHandler> context_handler =
init_state_->iothread_state_->GetHandler(
init_state_->global_id_, /*require_frame_match=*/false);
if (context_handler) {
if (!requestPtr) {
requestPtr = MakeRequest(request, request_id, true);
}
handler = context_handler->GetResourceRequestHandler(
init_state_->browser_, init_state_->frame_, requestPtr.get(),
init_state_->is_navigation_, init_state_->is_download_,
init_state_->request_initiator_, *intercept_only);
}
}
return handler;
}
RequestState* GetOrCreateState(int32_t request_id) {
RequestState* state = GetState(request_id);
if (!state) {
state = new RequestState();
request_map_.insert(std::make_pair(request_id, base::WrapUnique(state)));
}
return state;
}
RequestState* GetState(int32_t request_id) const {
RequestMap::const_iterator it = request_map_.find(request_id);
if (it != request_map_.end()) {
return it->second.get();
}
return nullptr;
}
void RemoveState(int32_t request_id) {
RequestMap::iterator it = request_map_.find(request_id);
DCHECK(it != request_map_.end());
if (it != request_map_.end()) {
request_map_.erase(it);
}
}
// Stop accepting new requests and cancel pending/in-flight requests when the
// CEF context or associated browser is destroyed.
void OnDestroyed() {
CEF_REQUIRE_IOT();
DCHECK(init_state_);
init_state_->DeleteDestructionObserver();
// Stop accepting new requests.
shutting_down_ = true;
// Stop the delivery of pending callbacks.
weak_ptr_factory_.InvalidateWeakPtrs();
// Take ownership of any pending requests.
PendingRequests pending_requests;
pending_requests.swap(pending_requests_);
// Take ownership of any in-progress requests.
RequestMap request_map;
request_map.swap(request_map_);
// Notify handlers for in-progress requests.
for (const auto& pair : request_map) {
CallHandlerOnComplete(
pair.second.get(),
network::URLLoaderCompletionStatus(net::ERR_ABORTED));
}
if (init_state_->browser_) {
// Clear objects that reference the browser.
init_state_->browser_ = nullptr;
init_state_->frame_ = nullptr;
}
// Execute cancel callbacks and delete pending and in-progress requests.
// This may result in the request being torn down sooner, or it may be
// ignored if the request is already in the process of being torn down. When
// the last callback is executed it may result in |this| being deleted.
pending_requests.clear();
for (auto& pair : request_map) {
auto state = std::move(pair.second);
if (state->cancel_callback_) {
// The cancel callback may trigger a call to OnRequestComplete followed
// by destruction of the InterceptedRequest that owns the
// ResourceRequest. We therefore need to clear the
// raw_ptr<ResourceRequest> first to avoid dangling pointer errors.
state->request_ = nullptr;
std::move(state->cancel_callback_).Run(net::ERR_ABORTED);
}
}
}
static CefRefPtr<CefRequestImpl> MakeRequest(
const network::ResourceRequest* request,
int64_t request_id,
bool read_only) {
CefRefPtr<CefRequestImpl> requestPtr = new CefRequestImpl();
requestPtr->Set(request, request_id);
if (read_only) {
requestPtr->SetReadOnly(true);
} else {
requestPtr->SetTrackChanges(true);
}
return requestPtr;
}
// Returns true if |request| cannot be handled internally.
static bool IsExternalRequest(const network::ResourceRequest* request) {
return !scheme::IsInternalHandledScheme(request->url.scheme());
}
scoped_refptr<InitHelper> init_helper_;
std::unique_ptr<InitState> init_state_;
bool shutting_down_ = false;
using RequestMap = std::map<int32_t, std::unique_ptr<RequestState>>;
RequestMap request_map_;
using PendingRequests = std::vector<std::unique_ptr<PendingRequest>>;
PendingRequests pending_requests_;
base::WeakPtrFactory<InterceptedRequestHandlerWrapper> weak_ptr_factory_;
};
} // namespace
std::unique_ptr<InterceptedRequestHandler> CreateInterceptedRequestHandler(
content::BrowserContext* browser_context,
content::RenderFrameHost* frame,
int render_process_id,
bool is_navigation,
bool is_download,
const url::Origin& request_initiator) {
CEF_REQUIRE_UIT();
CHECK(browser_context);
CefRefPtr<CefBrowserHostBase> browserPtr;
CefRefPtr<CefFrame> framePtr;
// Default to handlers for the same process in case |frame| doesn't have an
// associated CefBrowserHost.
content::GlobalRenderFrameHostId global_id(render_process_id,
MSG_ROUTING_NONE);
// |frame| may be nullptr for service worker requests.
if (frame) {
browserPtr = CefBrowserHostBase::GetBrowserForHost(frame);
if (browserPtr) {
// May return nullptr for excluded view requests.
framePtr = browserPtr->GetFrameForHost(frame);
if (!framePtr) {
framePtr = browserPtr->GetMainFrame();
}
global_id = frame->GetGlobalId();
}
}
auto init_state =
std::make_unique<InterceptedRequestHandlerWrapper::InitState>();
init_state->Initialize(browser_context, browserPtr, framePtr, global_id,
is_navigation, is_download, request_initiator,
base::RepeatingClosure());
auto wrapper = std::make_unique<InterceptedRequestHandlerWrapper>();
wrapper->init_helper()->MaybeSetInitialized(std::move(init_state));
return wrapper;
}
std::unique_ptr<InterceptedRequestHandler> CreateInterceptedRequestHandler(
content::WebContents::Getter web_contents_getter,
content::FrameTreeNodeId frame_tree_node_id,
const network::ResourceRequest& request,
const base::RepeatingClosure& unhandled_request_callback) {
CEF_REQUIRE_UIT();
content::WebContents* web_contents = web_contents_getter.Run();
CHECK(web_contents);
content::BrowserContext* browser_context = web_contents->GetBrowserContext();
CHECK(browser_context);
content::RenderFrameHost* frame = nullptr;
if (request.is_outermost_main_frame ||
static_cast<blink::mojom::ResourceType>(request.resource_type) ==
blink::mojom::ResourceType::kMainFrame) {
frame = web_contents->GetPrimaryMainFrame();
CHECK(frame);
} else {
// May return nullptr for frames in inner WebContents.
auto node = content::FrameTreeNode::GloballyFindByID(frame_tree_node_id);
if (node) {
frame = node->current_frame_host();
// RFHs can move between FrameTreeNodes. Make sure this one hasn't. See
// documentation on RenderFrameHost::GetFrameTreeNodeId() for background.
if (content::WebContents::FromRenderFrameHost(frame) != web_contents) {
frame = nullptr;
}
}
if (!frame) {
// Use the main frame for the CefBrowserHost.
frame = web_contents->GetPrimaryMainFrame();
CHECK(frame);
}
}
CefRefPtr<CefBrowserHostBase> browserPtr;
CefRefPtr<CefFrame> framePtr;
// Default to handlers for the same process in case |frame| doesn't have an
// associated CefBrowserHost.
content::GlobalRenderFrameHostId global_id(frame->GetProcess()->GetID(),
MSG_ROUTING_NONE);
browserPtr = CefBrowserHostBase::GetBrowserForHost(frame);
if (browserPtr) {
// May return nullptr for excluded view requests.
framePtr = browserPtr->GetFrameForHost(frame);
if (!framePtr) {
framePtr = browserPtr->GetMainFrame();
}
global_id = frame->GetGlobalId();
}
const bool is_navigation = ui::PageTransitionIsNewNavigation(
static_cast<ui::PageTransition>(request.transition_type));
// TODO(navigation): Can we determine the |is_download| value?
const bool is_download = false;
url::Origin request_initiator;
if (request.request_initiator.has_value()) {
request_initiator = *request.request_initiator;
}
auto init_state =
std::make_unique<InterceptedRequestHandlerWrapper::InitState>();
init_state->Initialize(browser_context, browserPtr, framePtr, global_id,
is_navigation, is_download, request_initiator,
unhandled_request_callback);
auto wrapper = std::make_unique<InterceptedRequestHandlerWrapper>();
wrapper->init_helper()->MaybeSetInitialized(std::move(init_state));
return wrapper;
}
} // namespace net_service
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