forked from mirrors/gecko-dev
ef1a7cfa30
Depends on D199172 Differential Revision: https://phabricator.services.mozilla.com/D199173
97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "TemporaryAccessGrantObserver.h"
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#include "mozilla/PermissionManager.h"
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#include "mozilla/Services.h"
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#include "nsIObserverService.h"
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#include "nsTHashtable.h"
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#include "nsXULAppAPI.h"
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using namespace mozilla;
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StaticAutoPtr<TemporaryAccessGrantObserver::ObserversTable>
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TemporaryAccessGrantObserver::sObservers;
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TemporaryAccessGrantObserver::TemporaryAccessGrantObserver(
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PermissionManager* aPM, nsIPrincipal* aPrincipal, const nsACString& aType)
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: mPM(aPM), mPrincipal(aPrincipal), mType(aType) {
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MOZ_ASSERT(XRE_IsParentProcess(),
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"Enforcing temporary access grant lifetimes can only be done in "
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"the parent process");
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}
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NS_IMPL_ISUPPORTS(TemporaryAccessGrantObserver, nsIObserver, nsINamed)
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// static
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void TemporaryAccessGrantObserver::Create(PermissionManager* aPM,
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nsIPrincipal* aPrincipal,
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const nsACString& aType) {
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MOZ_ASSERT(XRE_IsParentProcess());
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if (!sObservers) {
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sObservers = new ObserversTable();
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}
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sObservers->LookupOrInsertWith(
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std::make_pair(nsCOMPtr<nsIPrincipal>(aPrincipal), nsCString(aType)),
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[&]() -> nsCOMPtr<nsITimer> {
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// Only create a new observer if we don't have a matching
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// entry in our hashtable.
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nsCOMPtr<nsITimer> timer;
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RefPtr<TemporaryAccessGrantObserver> observer =
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new TemporaryAccessGrantObserver(aPM, aPrincipal, aType);
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nsresult rv = NS_NewTimerWithObserver(getter_AddRefs(timer), observer,
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24 * 60 * 60 * 1000, // 24 hours
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nsITimer::TYPE_ONE_SHOT);
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if (NS_SUCCEEDED(rv)) {
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observer->SetTimer(timer);
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return timer;
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}
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timer->Cancel();
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return nullptr;
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});
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}
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void TemporaryAccessGrantObserver::SetTimer(nsITimer* aTimer) {
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mTimer = aTimer;
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (observerService) {
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observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
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}
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}
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NS_IMETHODIMP
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TemporaryAccessGrantObserver::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) {
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if (strcmp(aTopic, NS_TIMER_CALLBACK_TOPIC) == 0) {
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Unused << mPM->RemoveFromPrincipal(mPrincipal, mType);
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MOZ_ASSERT(sObservers);
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sObservers->Remove(std::make_pair(mPrincipal, mType));
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} else if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
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nsCOMPtr<nsIObserverService> observerService =
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mozilla::services::GetObserverService();
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if (observerService) {
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observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
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}
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if (mTimer) {
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mTimer->Cancel();
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mTimer = nullptr;
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}
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sObservers = nullptr;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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TemporaryAccessGrantObserver::GetName(nsACString& aName) {
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aName.AssignLiteral("TemporaryAccessGrantObserver");
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return NS_OK;
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}
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