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content / browser / permissions / permission_service_context.cc [blame]
// Copyright 2014 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/permissions/permission_service_context.h"
#include <optional>
#include <utility>
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/permissions/permission_controller_impl.h"
#include "content/browser/permissions/permission_service_impl.h"
#include "content/browser/permissions/permission_util.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/common/permissions/permission_utils.h"
#include "url/origin.h"
namespace content {
// A holder owning document-associated PermissionServiceContext. The holder is
// used as PermissionServiceContext itself can't inherit from
// DocumentUserData, as PermissionServiceContext (unlike
// DocumentUserData) can be created when RenderFrameHost doesn't exist
// (e.g. for service workers).
struct PermissionServiceContext::DocumentPermissionServiceContextHolder
: public DocumentUserData<DocumentPermissionServiceContextHolder> {
explicit DocumentPermissionServiceContextHolder(RenderFrameHost* rfh)
: DocumentUserData<DocumentPermissionServiceContextHolder>(rfh),
permission_service_context(rfh) {}
PermissionServiceContext permission_service_context;
DOCUMENT_USER_DATA_KEY_DECL();
};
DOCUMENT_USER_DATA_KEY_IMPL(
PermissionServiceContext::DocumentPermissionServiceContextHolder);
class PermissionServiceContext::PermissionSubscription {
public:
PermissionSubscription(
PermissionStatus last_known_status,
PermissionServiceContext* context,
mojo::PendingRemote<blink::mojom::PermissionObserver> observer)
: last_known_status_(last_known_status),
context_(context),
observer_(std::move(observer)) {
observer_.set_disconnect_handler(base::BindOnce(
&PermissionSubscription::OnConnectionError, base::Unretained(this)));
}
PermissionSubscription(const PermissionSubscription&) = delete;
PermissionSubscription& operator=(const PermissionSubscription&) = delete;
~PermissionSubscription() {
DCHECK(id_);
BrowserContext* browser_context = context_->GetBrowserContext();
if (browser_context) {
PermissionControllerImpl::FromBrowserContext(browser_context)
->UnsubscribeFromPermissionStatusChange(id_);
}
}
void OnConnectionError() {
DCHECK(id_);
context_->ObserverHadConnectionError(id_);
}
void StoreStatusAtBFCacheEntry() {
status_at_bf_cache_entry_ =
std::make_optional<PermissionStatus>(last_known_status_);
}
void NotifyPermissionStatusChangedIfNeeded() {
DCHECK(status_at_bf_cache_entry_.has_value());
if (status_at_bf_cache_entry_ != last_known_status_) {
observer_->OnPermissionStatusChange(last_known_status_);
}
status_at_bf_cache_entry_.reset();
}
void OnPermissionStatusChanged(PermissionStatus status) {
if (!observer_.is_connected()) {
return;
}
last_known_status_ = status;
// Dispatching events while in BFCache is redundant. Permissions code in
// renderer process would decide to drop the event by looking at document's
// active status.
if (!status_at_bf_cache_entry_.has_value()) {
observer_->OnPermissionStatusChange(status);
}
}
void set_id(PermissionController::SubscriptionId id) { id_ = id; }
base::WeakPtr<PermissionSubscription> GetWeakPtr() {
return weak_ptr_factory_.GetWeakPtr();
}
private:
PermissionStatus last_known_status_ = PermissionStatus::LAST;
const raw_ptr<PermissionServiceContext> context_;
mojo::Remote<blink::mojom::PermissionObserver> observer_;
PermissionController::SubscriptionId id_;
// Optional variable to store the last status before the corresponding
// RenderFrameHost enters BFCache, and will be cleared when the
// RenderFrameHost is restored from BFCache. Non-empty value indicates that
// the RenderFrameHost is in BFCache.
std::optional<PermissionStatus> status_at_bf_cache_entry_;
base::WeakPtrFactory<PermissionSubscription> weak_ptr_factory_{this};
};
// static
PermissionServiceContext*
PermissionServiceContext::GetOrCreateForCurrentDocument(
RenderFrameHost* render_frame_host) {
return &DocumentPermissionServiceContextHolder::GetOrCreateForCurrentDocument(
render_frame_host)
->permission_service_context;
}
// static
PermissionServiceContext* PermissionServiceContext::GetForCurrentDocument(
RenderFrameHost* render_frame_host) {
auto* holder = DocumentPermissionServiceContextHolder::GetForCurrentDocument(
render_frame_host);
return holder ? &holder->permission_service_context : nullptr;
}
PermissionServiceContext::PermissionServiceContext(
RenderFrameHost* render_frame_host)
: render_frame_host_(render_frame_host), render_process_host_(nullptr) {
render_frame_host->GetProcess()->AddObserver(this);
}
PermissionServiceContext::PermissionServiceContext(
RenderProcessHost* render_process_host)
: render_frame_host_(nullptr), render_process_host_(render_process_host) {}
PermissionServiceContext::~PermissionServiceContext() {
if (render_frame_host_) {
render_frame_host_->GetProcess()->RemoveObserver(this);
}
}
void PermissionServiceContext::CreateService(
mojo::PendingReceiver<blink::mojom::PermissionService> receiver) {
DCHECK(render_frame_host_);
services_.Add(
std::make_unique<PermissionServiceImpl>(
this, url::Origin::Create(PermissionUtil::GetLastCommittedOriginAsURL(
render_frame_host_))),
std::move(receiver));
}
void PermissionServiceContext::CreateServiceForWorker(
const url::Origin& origin,
mojo::PendingReceiver<blink::mojom::PermissionService> receiver) {
services_.Add(std::make_unique<PermissionServiceImpl>(this, origin),
std::move(receiver));
}
void PermissionServiceContext::CreateSubscription(
blink::PermissionType permission_type,
const url::Origin& origin,
PermissionStatus current_status,
PermissionStatus last_known_status,
bool should_include_device_status,
mojo::PendingRemote<blink::mojom::PermissionObserver> observer) {
BrowserContext* browser_context = GetBrowserContext();
if (!browser_context) {
return;
}
auto subscription = std::make_unique<PermissionSubscription>(
last_known_status, this, std::move(observer));
if (current_status != last_known_status) {
subscription->OnPermissionStatusChanged(current_status);
}
if (render_frame_host_ &&
render_frame_host_->IsInLifecycleState(
content::RenderFrameHost::LifecycleState::kInBackForwardCache)) {
subscription->StoreStatusAtBFCacheEntry();
}
GURL requesting_origin(origin.Serialize());
auto subscription_id =
PermissionControllerImpl::FromBrowserContext(browser_context)
->SubscribeToPermissionStatusChange(
permission_type, render_process_host_, render_frame_host_,
requesting_origin, should_include_device_status,
base::BindRepeating(
&PermissionSubscription::OnPermissionStatusChanged,
subscription->GetWeakPtr()));
subscription->set_id(subscription_id);
subscriptions_[subscription_id] = std::move(subscription);
}
void PermissionServiceContext::ObserverHadConnectionError(
PermissionController::SubscriptionId subscription_id) {
size_t erased = subscriptions_.erase(subscription_id);
DCHECK_EQ(1u, erased);
}
BrowserContext* PermissionServiceContext::GetBrowserContext() const {
if (render_frame_host_)
return render_frame_host_->GetBrowserContext();
if (render_process_host_)
return render_process_host_->GetBrowserContext();
return nullptr;
}
GURL PermissionServiceContext::GetEmbeddingOrigin() const {
return render_frame_host_ ? PermissionUtil::GetLastCommittedOriginAsURL(
render_frame_host_->GetMainFrame())
: GURL();
}
void PermissionServiceContext::RenderProcessHostDestroyed(
RenderProcessHost* host) {
DCHECK(host == render_frame_host_->GetProcess());
subscriptions_.clear();
// RenderProcessHostImpl will always outlive 'this', but it gets cleaned up
// earlier so we need to listen to this event so we can do our clean up as
// well.
host->RemoveObserver(this);
}
void PermissionServiceContext::StoreStatusAtBFCacheEntry() {
for (auto& iter : subscriptions_) {
iter.second->StoreStatusAtBFCacheEntry();
}
}
void PermissionServiceContext::NotifyPermissionStatusChangedIfNeeded() {
for (auto& iter : subscriptions_) {
iter.second->NotifyPermissionStatusChangedIfNeeded();
}
}
} // namespace content